./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe631736-26b3-4f8f-aaa4-7944ca0f22c5/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe631736-26b3-4f8f-aaa4-7944ca0f22c5/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe631736-26b3-4f8f-aaa4-7944ca0f22c5/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe631736-26b3-4f8f-aaa4-7944ca0f22c5/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe631736-26b3-4f8f-aaa4-7944ca0f22c5/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe631736-26b3-4f8f-aaa4-7944ca0f22c5/bin/uautomizer-DrprNOufMa --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 61a0aa66b71092ec74a73b9f534556f5bbb6f25851e8b5ad307fc7dd7f051667 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 20:52:16,209 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 20:52:16,211 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 20:52:16,242 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 20:52:16,242 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 20:52:16,243 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 20:52:16,245 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 20:52:16,247 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 20:52:16,249 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 20:52:16,250 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 20:52:16,252 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 20:52:16,253 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 20:52:16,253 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 20:52:16,255 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 20:52:16,256 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 20:52:16,258 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 20:52:16,259 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 20:52:16,260 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 20:52:16,262 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 20:52:16,264 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 20:52:16,266 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 20:52:16,268 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 20:52:16,269 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 20:52:16,270 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 20:52:16,273 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 20:52:16,274 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 20:52:16,274 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 20:52:16,275 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 20:52:16,276 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 20:52:16,277 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 20:52:16,277 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 20:52:16,278 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 20:52:16,279 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 20:52:16,279 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 20:52:16,280 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 20:52:16,281 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 20:52:16,281 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 20:52:16,281 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 20:52:16,282 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 20:52:16,282 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 20:52:16,283 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 20:52:16,284 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe631736-26b3-4f8f-aaa4-7944ca0f22c5/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 20:52:16,308 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 20:52:16,308 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 20:52:16,308 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 20:52:16,309 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 20:52:16,309 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 20:52:16,309 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 20:52:16,310 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 20:52:16,310 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 20:52:16,310 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 20:52:16,311 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 20:52:16,311 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 20:52:16,311 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 20:52:16,311 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 20:52:16,311 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 20:52:16,312 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 20:52:16,312 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 20:52:16,312 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 20:52:16,312 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 20:52:16,312 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 20:52:16,312 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 20:52:16,313 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 20:52:16,313 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 20:52:16,313 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 20:52:16,313 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 20:52:16,313 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 20:52:16,314 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 20:52:16,314 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 20:52:16,314 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 20:52:16,314 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 20:52:16,314 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 20:52:16,315 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 20:52:16,315 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 20:52:16,315 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 20:52:16,315 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 20:52:16,315 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_fe631736-26b3-4f8f-aaa4-7944ca0f22c5/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe631736-26b3-4f8f-aaa4-7944ca0f22c5/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 61a0aa66b71092ec74a73b9f534556f5bbb6f25851e8b5ad307fc7dd7f051667 [2021-12-06 20:52:16,516 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 20:52:16,532 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 20:52:16,534 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 20:52:16,535 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 20:52:16,536 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 20:52:16,537 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe631736-26b3-4f8f-aaa4-7944ca0f22c5/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-2.c [2021-12-06 20:52:16,580 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe631736-26b3-4f8f-aaa4-7944ca0f22c5/bin/uautomizer-DrprNOufMa/data/45f01af0d/2edc677db2a4425883a0af0472e11e95/FLAG892f7fb56 [2021-12-06 20:52:17,020 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 20:52:17,021 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe631736-26b3-4f8f-aaa4-7944ca0f22c5/sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-2.c [2021-12-06 20:52:17,036 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe631736-26b3-4f8f-aaa4-7944ca0f22c5/bin/uautomizer-DrprNOufMa/data/45f01af0d/2edc677db2a4425883a0af0472e11e95/FLAG892f7fb56 [2021-12-06 20:52:17,048 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe631736-26b3-4f8f-aaa4-7944ca0f22c5/bin/uautomizer-DrprNOufMa/data/45f01af0d/2edc677db2a4425883a0af0472e11e95 [2021-12-06 20:52:17,049 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 20:52:17,051 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 20:52:17,052 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 20:52:17,052 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 20:52:17,055 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 20:52:17,055 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 08:52:17" (1/1) ... [2021-12-06 20:52:17,056 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@390e60c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:52:17, skipping insertion in model container [2021-12-06 20:52:17,056 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 08:52:17" (1/1) ... [2021-12-06 20:52:17,061 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 20:52:17,099 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 20:52:17,390 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_fe631736-26b3-4f8f-aaa4-7944ca0f22c5/sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-2.c[78808,78821] [2021-12-06 20:52:17,400 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 20:52:17,411 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 20:52:17,478 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_fe631736-26b3-4f8f-aaa4-7944ca0f22c5/sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-2.c[78808,78821] [2021-12-06 20:52:17,479 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 20:52:17,491 INFO L208 MainTranslator]: Completed translation [2021-12-06 20:52:17,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:52:17 WrapperNode [2021-12-06 20:52:17,491 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 20:52:17,492 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 20:52:17,492 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 20:52:17,492 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 20:52:17,498 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:52:17" (1/1) ... [2021-12-06 20:52:17,514 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:52:17" (1/1) ... [2021-12-06 20:52:17,547 INFO L137 Inliner]: procedures = 31, calls = 223, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 816 [2021-12-06 20:52:17,547 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 20:52:17,548 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 20:52:17,548 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 20:52:17,548 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 20:52:17,554 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:52:17" (1/1) ... [2021-12-06 20:52:17,554 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:52:17" (1/1) ... [2021-12-06 20:52:17,561 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:52:17" (1/1) ... [2021-12-06 20:52:17,561 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:52:17" (1/1) ... [2021-12-06 20:52:17,591 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:52:17" (1/1) ... [2021-12-06 20:52:17,597 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:52:17" (1/1) ... [2021-12-06 20:52:17,599 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:52:17" (1/1) ... [2021-12-06 20:52:17,604 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 20:52:17,605 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 20:52:17,605 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 20:52:17,605 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 20:52:17,606 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:52:17" (1/1) ... [2021-12-06 20:52:17,611 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 20:52:17,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe631736-26b3-4f8f-aaa4-7944ca0f22c5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:52:17,632 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe631736-26b3-4f8f-aaa4-7944ca0f22c5/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 20:52:17,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe631736-26b3-4f8f-aaa4-7944ca0f22c5/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 20:52:17,669 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 20:52:17,669 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-06 20:52:17,670 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 20:52:17,670 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 20:52:17,670 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-06 20:52:17,670 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 20:52:17,670 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-06 20:52:17,670 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 20:52:17,670 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 20:52:17,794 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 20:52:17,796 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 20:52:17,816 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-06 20:52:20,323 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-12-06 20:52:20,323 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-12-06 20:52:20,323 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 20:52:20,331 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 20:52:20,331 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-06 20:52:20,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 08:52:20 BoogieIcfgContainer [2021-12-06 20:52:20,334 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 20:52:20,335 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 20:52:20,336 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 20:52:20,338 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 20:52:20,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 08:52:17" (1/3) ... [2021-12-06 20:52:20,339 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bec5cef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 08:52:20, skipping insertion in model container [2021-12-06 20:52:20,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:52:17" (2/3) ... [2021-12-06 20:52:20,340 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bec5cef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 08:52:20, skipping insertion in model container [2021-12-06 20:52:20,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 08:52:20" (3/3) ... [2021-12-06 20:52:20,341 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.06.i.cil-2.c [2021-12-06 20:52:20,346 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 20:52:20,347 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 20:52:20,383 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 20:52:20,388 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 [2021-12-06 20:52:20,389 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 20:52:20,407 INFO L276 IsEmpty]: Start isEmpty. Operand has 162 states, 160 states have (on average 1.7375) internal successors, (278), 161 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:52:20,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-06 20:52:20,415 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:52:20,415 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:52:20,416 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:52:20,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:52:20,419 INFO L85 PathProgramCache]: Analyzing trace with hash 271453869, now seen corresponding path program 1 times [2021-12-06 20:52:20,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:52:20,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296546063] [2021-12-06 20:52:20,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:52:20,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:52:20,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:52:20,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:52:20,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:52:20,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296546063] [2021-12-06 20:52:20,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296546063] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:52:20,788 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:52:20,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:52:20,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877503004] [2021-12-06 20:52:20,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:52:20,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:52:20,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:52:20,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:52:20,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:52:20,833 INFO L87 Difference]: Start difference. First operand has 162 states, 160 states have (on average 1.7375) internal successors, (278), 161 states have internal predecessors, (278), 0 states have call successors, (0), 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 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:52:22,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:52:22,156 INFO L93 Difference]: Finished difference Result 455 states and 784 transitions. [2021-12-06 20:52:22,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:52:22,158 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 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 47 [2021-12-06 20:52:22,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:52:22,168 INFO L225 Difference]: With dead ends: 455 [2021-12-06 20:52:22,168 INFO L226 Difference]: Without dead ends: 278 [2021-12-06 20:52:22,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:52:22,173 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 176 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:52:22,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 511 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-06 20:52:22,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-12-06 20:52:22,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 189. [2021-12-06 20:52:22,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 1.6329787234042554) internal successors, (307), 188 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:52:22,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 307 transitions. [2021-12-06 20:52:22,210 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 307 transitions. Word has length 47 [2021-12-06 20:52:22,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:52:22,211 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 307 transitions. [2021-12-06 20:52:22,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:52:22,211 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 307 transitions. [2021-12-06 20:52:22,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-06 20:52:22,213 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:52:22,213 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:52:22,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 20:52:22,214 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:52:22,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:52:22,214 INFO L85 PathProgramCache]: Analyzing trace with hash -72299220, now seen corresponding path program 1 times [2021-12-06 20:52:22,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:52:22,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474170151] [2021-12-06 20:52:22,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:52:22,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:52:22,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:52:22,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:52:22,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:52:22,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474170151] [2021-12-06 20:52:22,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474170151] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:52:22,334 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:52:22,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:52:22,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76477377] [2021-12-06 20:52:22,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:52:22,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:52:22,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:52:22,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:52:22,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:52:22,337 INFO L87 Difference]: Start difference. First operand 189 states and 307 transitions. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:52:24,346 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:52:24,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:52:24,547 INFO L93 Difference]: Finished difference Result 396 states and 641 transitions. [2021-12-06 20:52:24,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:52:24,547 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-12-06 20:52:24,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:52:24,549 INFO L225 Difference]: With dead ends: 396 [2021-12-06 20:52:24,549 INFO L226 Difference]: Without dead ends: 217 [2021-12-06 20:52:24,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:52:24,551 INFO L933 BasicCegarLoop]: 208 mSDtfsCounter, 22 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:52:24,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 541 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 150 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-06 20:52:24,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-12-06 20:52:24,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 200. [2021-12-06 20:52:24,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 1.6381909547738693) internal successors, (326), 199 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:52:24,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 326 transitions. [2021-12-06 20:52:24,563 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 326 transitions. Word has length 48 [2021-12-06 20:52:24,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:52:24,563 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 326 transitions. [2021-12-06 20:52:24,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:52:24,563 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 326 transitions. [2021-12-06 20:52:24,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-06 20:52:24,565 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:52:24,565 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:52:24,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 20:52:24,566 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:52:24,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:52:24,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1865586560, now seen corresponding path program 1 times [2021-12-06 20:52:24,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:52:24,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139136405] [2021-12-06 20:52:24,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:52:24,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:52:24,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:52:24,680 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:52:24,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:52:24,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139136405] [2021-12-06 20:52:24,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139136405] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:52:24,682 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:52:24,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:52:24,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52449901] [2021-12-06 20:52:24,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:52:24,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:52:24,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:52:24,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:52:24,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:52:24,684 INFO L87 Difference]: Start difference. First operand 200 states and 326 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:52:26,524 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:52:26,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:52:26,836 INFO L93 Difference]: Finished difference Result 546 states and 895 transitions. [2021-12-06 20:52:26,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:52:26,837 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-12-06 20:52:26,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:52:26,839 INFO L225 Difference]: With dead ends: 546 [2021-12-06 20:52:26,839 INFO L226 Difference]: Without dead ends: 367 [2021-12-06 20:52:26,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:52:26,841 INFO L933 BasicCegarLoop]: 303 mSDtfsCounter, 165 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:52:26,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 730 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-06 20:52:26,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-12-06 20:52:26,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 232. [2021-12-06 20:52:26,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 1.632034632034632) internal successors, (377), 231 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) [2021-12-06 20:52:26,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 377 transitions. [2021-12-06 20:52:26,859 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 377 transitions. Word has length 61 [2021-12-06 20:52:26,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:52:26,860 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 377 transitions. [2021-12-06 20:52:26,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:52:26,860 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 377 transitions. [2021-12-06 20:52:26,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-06 20:52:26,863 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:52:26,863 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:52:26,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 20:52:26,864 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:52:26,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:52:26,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1829403441, now seen corresponding path program 1 times [2021-12-06 20:52:26,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:52:26,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135187617] [2021-12-06 20:52:26,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:52:26,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:52:26,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:52:26,963 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:52:26,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:52:26,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135187617] [2021-12-06 20:52:26,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135187617] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:52:26,964 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:52:26,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:52:26,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660839055] [2021-12-06 20:52:26,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:52:26,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:52:26,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:52:26,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:52:26,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:52:26,966 INFO L87 Difference]: Start difference. First operand 232 states and 377 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:52:28,113 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:52:28,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:52:28,407 INFO L93 Difference]: Finished difference Result 554 states and 898 transitions. [2021-12-06 20:52:28,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:52:28,408 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-12-06 20:52:28,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:52:28,409 INFO L225 Difference]: With dead ends: 554 [2021-12-06 20:52:28,409 INFO L226 Difference]: Without dead ends: 343 [2021-12-06 20:52:28,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:52:28,411 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 170 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-06 20:52:28,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 406 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-06 20:52:28,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-12-06 20:52:28,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 232. [2021-12-06 20:52:28,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 1.6147186147186148) internal successors, (373), 231 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:52:28,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 373 transitions. [2021-12-06 20:52:28,422 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 373 transitions. Word has length 62 [2021-12-06 20:52:28,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:52:28,423 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 373 transitions. [2021-12-06 20:52:28,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:52:28,423 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 373 transitions. [2021-12-06 20:52:28,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-06 20:52:28,425 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:52:28,425 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:52:28,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 20:52:28,425 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:52:28,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:52:28,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1620873285, now seen corresponding path program 1 times [2021-12-06 20:52:28,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:52:28,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418877026] [2021-12-06 20:52:28,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:52:28,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:52:28,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:52:28,528 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:52:28,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:52:28,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418877026] [2021-12-06 20:52:28,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418877026] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:52:28,529 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:52:28,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:52:28,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45777847] [2021-12-06 20:52:28,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:52:28,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:52:28,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:52:28,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:52:28,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:52:28,530 INFO L87 Difference]: Start difference. First operand 232 states and 373 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:52:29,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:52:29,585 INFO L93 Difference]: Finished difference Result 459 states and 735 transitions. [2021-12-06 20:52:29,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:52:29,586 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-12-06 20:52:29,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:52:29,587 INFO L225 Difference]: With dead ends: 459 [2021-12-06 20:52:29,587 INFO L226 Difference]: Without dead ends: 248 [2021-12-06 20:52:29,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:52:29,588 INFO L933 BasicCegarLoop]: 210 mSDtfsCounter, 26 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:52:29,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 545 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-06 20:52:29,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-12-06 20:52:29,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 232. [2021-12-06 20:52:29,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 1.6103896103896105) internal successors, (372), 231 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:52:29,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 372 transitions. [2021-12-06 20:52:29,596 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 372 transitions. Word has length 62 [2021-12-06 20:52:29,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:52:29,596 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 372 transitions. [2021-12-06 20:52:29,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:52:29,596 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 372 transitions. [2021-12-06 20:52:29,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-06 20:52:29,597 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:52:29,597 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:52:29,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 20:52:29,597 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:52:29,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:52:29,598 INFO L85 PathProgramCache]: Analyzing trace with hash 519909764, now seen corresponding path program 1 times [2021-12-06 20:52:29,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:52:29,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159766649] [2021-12-06 20:52:29,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:52:29,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:52:29,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:52:29,675 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:52:29,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:52:29,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159766649] [2021-12-06 20:52:29,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159766649] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:52:29,676 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:52:29,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:52:29,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100233468] [2021-12-06 20:52:29,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:52:29,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:52:29,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:52:29,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:52:29,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:52:29,678 INFO L87 Difference]: Start difference. First operand 232 states and 372 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:52:31,029 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:52:31,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:52:31,216 INFO L93 Difference]: Finished difference Result 458 states and 733 transitions. [2021-12-06 20:52:31,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:52:31,217 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-12-06 20:52:31,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:52:31,219 INFO L225 Difference]: With dead ends: 458 [2021-12-06 20:52:31,219 INFO L226 Difference]: Without dead ends: 247 [2021-12-06 20:52:31,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:52:31,220 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 19 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-06 20:52:31,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 547 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-06 20:52:31,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-12-06 20:52:31,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 232. [2021-12-06 20:52:31,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 1.606060606060606) internal successors, (371), 231 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:52:31,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 371 transitions. [2021-12-06 20:52:31,229 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 371 transitions. Word has length 62 [2021-12-06 20:52:31,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:52:31,230 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 371 transitions. [2021-12-06 20:52:31,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:52:31,230 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 371 transitions. [2021-12-06 20:52:31,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-06 20:52:31,231 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:52:31,231 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:52:31,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 20:52:31,232 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:52:31,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:52:31,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1154887876, now seen corresponding path program 1 times [2021-12-06 20:52:31,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:52:31,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932151233] [2021-12-06 20:52:31,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:52:31,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:52:31,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:52:31,315 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:52:31,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:52:31,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932151233] [2021-12-06 20:52:31,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932151233] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:52:31,316 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:52:31,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:52:31,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90169971] [2021-12-06 20:52:31,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:52:31,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:52:31,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:52:31,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:52:31,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:52:31,317 INFO L87 Difference]: Start difference. First operand 232 states and 371 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:52:32,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:52:32,256 INFO L93 Difference]: Finished difference Result 554 states and 889 transitions. [2021-12-06 20:52:32,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:52:32,256 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-12-06 20:52:32,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:52:32,258 INFO L225 Difference]: With dead ends: 554 [2021-12-06 20:52:32,258 INFO L226 Difference]: Without dead ends: 343 [2021-12-06 20:52:32,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:52:32,259 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 163 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 20:52:32,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 406 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-06 20:52:32,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-12-06 20:52:32,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 233. [2021-12-06 20:52:32,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 1.5948275862068966) internal successors, (370), 232 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:52:32,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 370 transitions. [2021-12-06 20:52:32,266 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 370 transitions. Word has length 62 [2021-12-06 20:52:32,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:52:32,266 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 370 transitions. [2021-12-06 20:52:32,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:52:32,266 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 370 transitions. [2021-12-06 20:52:32,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-06 20:52:32,267 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:52:32,267 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:52:32,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 20:52:32,267 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:52:32,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:52:32,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1662386487, now seen corresponding path program 1 times [2021-12-06 20:52:32,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:52:32,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893258503] [2021-12-06 20:52:32,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:52:32,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:52:32,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:52:32,337 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:52:32,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:52:32,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893258503] [2021-12-06 20:52:32,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893258503] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:52:32,338 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:52:32,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:52:32,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866793982] [2021-12-06 20:52:32,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:52:32,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:52:32,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:52:32,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:52:32,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:52:32,339 INFO L87 Difference]: Start difference. First operand 233 states and 370 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:52:33,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:52:33,292 INFO L93 Difference]: Finished difference Result 458 states and 729 transitions. [2021-12-06 20:52:33,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:52:33,293 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-12-06 20:52:33,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:52:33,294 INFO L225 Difference]: With dead ends: 458 [2021-12-06 20:52:33,294 INFO L226 Difference]: Without dead ends: 246 [2021-12-06 20:52:33,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:52:33,295 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 22 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 20:52:33,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 551 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-06 20:52:33,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-12-06 20:52:33,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 233. [2021-12-06 20:52:33,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 1.5905172413793103) internal successors, (369), 232 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:52:33,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 369 transitions. [2021-12-06 20:52:33,301 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 369 transitions. Word has length 63 [2021-12-06 20:52:33,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:52:33,301 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 369 transitions. [2021-12-06 20:52:33,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:52:33,302 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 369 transitions. [2021-12-06 20:52:33,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-06 20:52:33,302 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:52:33,302 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:52:33,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 20:52:33,302 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:52:33,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:52:33,303 INFO L85 PathProgramCache]: Analyzing trace with hash -838476330, now seen corresponding path program 1 times [2021-12-06 20:52:33,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:52:33,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813639113] [2021-12-06 20:52:33,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:52:33,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:52:33,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:52:33,391 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:52:33,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:52:33,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813639113] [2021-12-06 20:52:33,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813639113] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:52:33,392 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:52:33,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:52:33,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519818759] [2021-12-06 20:52:33,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:52:33,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:52:33,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:52:33,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:52:33,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:52:33,393 INFO L87 Difference]: Start difference. First operand 233 states and 369 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 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) [2021-12-06 20:52:34,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:52:34,465 INFO L93 Difference]: Finished difference Result 458 states and 728 transitions. [2021-12-06 20:52:34,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:52:34,466 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 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 64 [2021-12-06 20:52:34,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:52:34,467 INFO L225 Difference]: With dead ends: 458 [2021-12-06 20:52:34,467 INFO L226 Difference]: Without dead ends: 246 [2021-12-06 20:52:34,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:52:34,468 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 20 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:52:34,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 551 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-06 20:52:34,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-12-06 20:52:34,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 233. [2021-12-06 20:52:34,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 1.5862068965517242) internal successors, (368), 232 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:52:34,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 368 transitions. [2021-12-06 20:52:34,474 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 368 transitions. Word has length 64 [2021-12-06 20:52:34,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:52:34,474 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 368 transitions. [2021-12-06 20:52:34,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 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) [2021-12-06 20:52:34,474 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 368 transitions. [2021-12-06 20:52:34,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-06 20:52:34,475 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:52:34,475 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:52:34,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-06 20:52:34,475 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:52:34,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:52:34,476 INFO L85 PathProgramCache]: Analyzing trace with hash 2036454322, now seen corresponding path program 1 times [2021-12-06 20:52:34,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:52:34,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483216951] [2021-12-06 20:52:34,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:52:34,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:52:34,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:52:34,540 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:52:34,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:52:34,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483216951] [2021-12-06 20:52:34,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483216951] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:52:34,540 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:52:34,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:52:34,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409237113] [2021-12-06 20:52:34,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:52:34,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:52:34,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:52:34,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:52:34,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:52:34,541 INFO L87 Difference]: Start difference. First operand 233 states and 368 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:52:35,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:52:35,205 INFO L93 Difference]: Finished difference Result 448 states and 714 transitions. [2021-12-06 20:52:35,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:52:35,205 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-12-06 20:52:35,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:52:35,207 INFO L225 Difference]: With dead ends: 448 [2021-12-06 20:52:35,207 INFO L226 Difference]: Without dead ends: 236 [2021-12-06 20:52:35,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:52:35,208 INFO L933 BasicCegarLoop]: 220 mSDtfsCounter, 11 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 20:52:35,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 565 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 20:52:35,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-12-06 20:52:35,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 233. [2021-12-06 20:52:35,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 1.581896551724138) internal successors, (367), 232 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:52:35,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 367 transitions. [2021-12-06 20:52:35,213 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 367 transitions. Word has length 65 [2021-12-06 20:52:35,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:52:35,213 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 367 transitions. [2021-12-06 20:52:35,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:52:35,213 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 367 transitions. [2021-12-06 20:52:35,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-06 20:52:35,214 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:52:35,214 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:52:35,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-06 20:52:35,214 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:52:35,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:52:35,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1556245834, now seen corresponding path program 1 times [2021-12-06 20:52:35,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:52:35,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788493863] [2021-12-06 20:52:35,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:52:35,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:52:35,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:52:35,276 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:52:35,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:52:35,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788493863] [2021-12-06 20:52:35,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788493863] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:52:35,277 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:52:35,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:52:35,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539889884] [2021-12-06 20:52:35,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:52:35,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:52:35,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:52:35,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:52:35,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:52:35,279 INFO L87 Difference]: Start difference. First operand 233 states and 367 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:52:36,414 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:52:36,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:52:36,595 INFO L93 Difference]: Finished difference Result 485 states and 769 transitions. [2021-12-06 20:52:36,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:52:36,595 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-12-06 20:52:36,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:52:36,597 INFO L225 Difference]: With dead ends: 485 [2021-12-06 20:52:36,597 INFO L226 Difference]: Without dead ends: 273 [2021-12-06 20:52:36,597 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 [2021-12-06 20:52:36,598 INFO L933 BasicCegarLoop]: 219 mSDtfsCounter, 31 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:52:36,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 569 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-06 20:52:36,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-12-06 20:52:36,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 255. [2021-12-06 20:52:36,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 1.5826771653543308) internal successors, (402), 254 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:52:36,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 402 transitions. [2021-12-06 20:52:36,603 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 402 transitions. Word has length 65 [2021-12-06 20:52:36,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:52:36,604 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 402 transitions. [2021-12-06 20:52:36,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:52:36,604 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 402 transitions. [2021-12-06 20:52:36,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-06 20:52:36,604 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:52:36,605 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:52:36,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-06 20:52:36,605 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:52:36,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:52:36,605 INFO L85 PathProgramCache]: Analyzing trace with hash -120356007, now seen corresponding path program 1 times [2021-12-06 20:52:36,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:52:36,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303406096] [2021-12-06 20:52:36,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:52:36,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:52:36,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:52:36,665 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:52:36,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:52:36,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303406096] [2021-12-06 20:52:36,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303406096] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:52:36,665 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:52:36,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:52:36,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829330273] [2021-12-06 20:52:36,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:52:36,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:52:36,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:52:36,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:52:36,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:52:36,666 INFO L87 Difference]: Start difference. First operand 255 states and 402 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) [2021-12-06 20:52:38,148 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:52:38,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:52:38,424 INFO L93 Difference]: Finished difference Result 599 states and 953 transitions. [2021-12-06 20:52:38,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:52:38,424 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 79 [2021-12-06 20:52:38,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:52:38,426 INFO L225 Difference]: With dead ends: 599 [2021-12-06 20:52:38,426 INFO L226 Difference]: Without dead ends: 365 [2021-12-06 20:52:38,427 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 [2021-12-06 20:52:38,427 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 168 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-06 20:52:38,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 406 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-06 20:52:38,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-12-06 20:52:38,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 255. [2021-12-06 20:52:38,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 1.5669291338582678) internal successors, (398), 254 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:52:38,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 398 transitions. [2021-12-06 20:52:38,434 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 398 transitions. Word has length 79 [2021-12-06 20:52:38,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:52:38,434 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 398 transitions. [2021-12-06 20:52:38,434 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) [2021-12-06 20:52:38,434 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 398 transitions. [2021-12-06 20:52:38,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-06 20:52:38,435 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:52:38,435 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:52:38,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-06 20:52:38,435 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:52:38,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:52:38,435 INFO L85 PathProgramCache]: Analyzing trace with hash 2020427042, now seen corresponding path program 1 times [2021-12-06 20:52:38,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:52:38,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735219536] [2021-12-06 20:52:38,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:52:38,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:52:38,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:52:38,500 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:52:38,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:52:38,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735219536] [2021-12-06 20:52:38,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735219536] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:52:38,500 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:52:38,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:52:38,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737558173] [2021-12-06 20:52:38,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:52:38,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:52:38,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:52:38,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:52:38,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:52:38,502 INFO L87 Difference]: Start difference. First operand 255 states and 398 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) [2021-12-06 20:52:39,888 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:52:40,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:52:40,084 INFO L93 Difference]: Finished difference Result 506 states and 794 transitions. [2021-12-06 20:52:40,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:52:40,084 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 79 [2021-12-06 20:52:40,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:52:40,086 INFO L225 Difference]: With dead ends: 506 [2021-12-06 20:52:40,086 INFO L226 Difference]: Without dead ends: 272 [2021-12-06 20:52:40,086 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 [2021-12-06 20:52:40,087 INFO L933 BasicCegarLoop]: 221 mSDtfsCounter, 33 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 571 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 [2021-12-06 20:52:40,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 571 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-06 20:52:40,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-12-06 20:52:40,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 255. [2021-12-06 20:52:40,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 1.562992125984252) internal successors, (397), 254 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:52:40,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 397 transitions. [2021-12-06 20:52:40,092 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 397 transitions. Word has length 79 [2021-12-06 20:52:40,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:52:40,093 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 397 transitions. [2021-12-06 20:52:40,093 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) [2021-12-06 20:52:40,093 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 397 transitions. [2021-12-06 20:52:40,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-06 20:52:40,093 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:52:40,094 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:52:40,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-06 20:52:40,094 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:52:40,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:52:40,094 INFO L85 PathProgramCache]: Analyzing trace with hash 933781849, now seen corresponding path program 1 times [2021-12-06 20:52:40,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:52:40,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845885832] [2021-12-06 20:52:40,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:52:40,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:52:40,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:52:40,158 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:52:40,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:52:40,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845885832] [2021-12-06 20:52:40,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845885832] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:52:40,158 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:52:40,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:52:40,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475347361] [2021-12-06 20:52:40,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:52:40,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:52:40,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:52:40,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:52:40,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:52:40,159 INFO L87 Difference]: Start difference. First operand 255 states and 397 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) [2021-12-06 20:52:42,165 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:52:42,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:52:42,451 INFO L93 Difference]: Finished difference Result 599 states and 943 transitions. [2021-12-06 20:52:42,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:52:42,451 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 80 [2021-12-06 20:52:42,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:52:42,453 INFO L225 Difference]: With dead ends: 599 [2021-12-06 20:52:42,453 INFO L226 Difference]: Without dead ends: 365 [2021-12-06 20:52:42,453 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 [2021-12-06 20:52:42,454 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 166 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 61 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:52:42,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 406 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 259 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-06 20:52:42,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-12-06 20:52:42,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 255. [2021-12-06 20:52:42,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 1.547244094488189) internal successors, (393), 254 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:52:42,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 393 transitions. [2021-12-06 20:52:42,459 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 393 transitions. Word has length 80 [2021-12-06 20:52:42,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:52:42,459 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 393 transitions. [2021-12-06 20:52:42,459 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) [2021-12-06 20:52:42,460 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 393 transitions. [2021-12-06 20:52:42,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-06 20:52:42,460 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:52:42,460 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:52:42,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-06 20:52:42,460 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:52:42,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:52:42,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1950383628, now seen corresponding path program 1 times [2021-12-06 20:52:42,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:52:42,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865182275] [2021-12-06 20:52:42,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:52:42,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:52:42,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:52:42,533 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:52:42,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:52:42,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865182275] [2021-12-06 20:52:42,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865182275] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:52:42,533 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:52:42,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:52:42,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071227831] [2021-12-06 20:52:42,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:52:42,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:52:42,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:52:42,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:52:42,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:52:42,534 INFO L87 Difference]: Start difference. First operand 255 states and 393 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) [2021-12-06 20:52:43,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:52:43,592 INFO L93 Difference]: Finished difference Result 599 states and 935 transitions. [2021-12-06 20:52:43,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:52:43,593 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 81 [2021-12-06 20:52:43,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:52:43,595 INFO L225 Difference]: With dead ends: 599 [2021-12-06 20:52:43,595 INFO L226 Difference]: Without dead ends: 365 [2021-12-06 20:52:43,595 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 [2021-12-06 20:52:43,596 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 164 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:52:43,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 406 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-06 20:52:43,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-12-06 20:52:43,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 255. [2021-12-06 20:52:43,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 1.531496062992126) internal successors, (389), 254 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) [2021-12-06 20:52:43,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 389 transitions. [2021-12-06 20:52:43,605 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 389 transitions. Word has length 81 [2021-12-06 20:52:43,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:52:43,605 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 389 transitions. [2021-12-06 20:52:43,605 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) [2021-12-06 20:52:43,605 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 389 transitions. [2021-12-06 20:52:43,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-06 20:52:43,606 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:52:43,606 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:52:43,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-06 20:52:43,606 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:52:43,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:52:43,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1927066452, now seen corresponding path program 1 times [2021-12-06 20:52:43,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:52:43,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684003146] [2021-12-06 20:52:43,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:52:43,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:52:43,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:52:43,677 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:52:43,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:52:43,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684003146] [2021-12-06 20:52:43,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684003146] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:52:43,678 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:52:43,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:52:43,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180181873] [2021-12-06 20:52:43,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:52:43,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:52:43,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:52:43,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:52:43,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:52:43,680 INFO L87 Difference]: Start difference. First operand 255 states and 389 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) [2021-12-06 20:52:45,688 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:52:45,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:52:45,954 INFO L93 Difference]: Finished difference Result 589 states and 914 transitions. [2021-12-06 20:52:45,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:52:45,954 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 82 [2021-12-06 20:52:45,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:52:45,956 INFO L225 Difference]: With dead ends: 589 [2021-12-06 20:52:45,956 INFO L226 Difference]: Without dead ends: 355 [2021-12-06 20:52:45,956 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 [2021-12-06 20:52:45,957 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 155 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 54 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:52:45,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 426 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 245 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-06 20:52:45,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-12-06 20:52:45,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 255. [2021-12-06 20:52:45,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 1.515748031496063) internal successors, (385), 254 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) [2021-12-06 20:52:45,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 385 transitions. [2021-12-06 20:52:45,962 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 385 transitions. Word has length 82 [2021-12-06 20:52:45,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:52:45,962 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 385 transitions. [2021-12-06 20:52:45,962 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) [2021-12-06 20:52:45,962 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 385 transitions. [2021-12-06 20:52:45,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-06 20:52:45,963 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:52:45,963 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, 1, 1, 1, 1] [2021-12-06 20:52:45,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-06 20:52:45,963 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:52:45,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:52:45,963 INFO L85 PathProgramCache]: Analyzing trace with hash -2120868205, now seen corresponding path program 1 times [2021-12-06 20:52:45,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:52:45,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095343126] [2021-12-06 20:52:45,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:52:45,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:52:46,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:52:46,053 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-06 20:52:46,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:52:46,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095343126] [2021-12-06 20:52:46,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095343126] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:52:46,053 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:52:46,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:52:46,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627550079] [2021-12-06 20:52:46,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:52:46,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:52:46,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:52:46,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:52:46,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:52:46,054 INFO L87 Difference]: Start difference. First operand 255 states and 385 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:52:47,528 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:52:47,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:52:47,776 INFO L93 Difference]: Finished difference Result 589 states and 906 transitions. [2021-12-06 20:52:47,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:52:47,776 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 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 87 [2021-12-06 20:52:47,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:52:47,778 INFO L225 Difference]: With dead ends: 589 [2021-12-06 20:52:47,778 INFO L226 Difference]: Without dead ends: 355 [2021-12-06 20:52:47,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:52:47,779 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 129 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-06 20:52:47,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 456 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-06 20:52:47,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-12-06 20:52:47,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 278. [2021-12-06 20:52:47,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 1.552346570397112) internal successors, (430), 277 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:52:47,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 430 transitions. [2021-12-06 20:52:47,784 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 430 transitions. Word has length 87 [2021-12-06 20:52:47,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:52:47,784 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 430 transitions. [2021-12-06 20:52:47,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:52:47,784 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 430 transitions. [2021-12-06 20:52:47,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-12-06 20:52:47,785 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:52:47,785 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:52:47,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-06 20:52:47,785 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:52:47,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:52:47,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1055569381, now seen corresponding path program 1 times [2021-12-06 20:52:47,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:52:47,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144888832] [2021-12-06 20:52:47,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:52:47,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:52:47,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:52:47,858 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-06 20:52:47,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:52:47,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144888832] [2021-12-06 20:52:47,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144888832] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:52:47,858 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:52:47,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:52:47,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810622698] [2021-12-06 20:52:47,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:52:47,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:52:47,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:52:47,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:52:47,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:52:47,859 INFO L87 Difference]: Start difference. First operand 278 states and 430 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 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) [2021-12-06 20:52:49,866 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:52:50,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:52:50,120 INFO L93 Difference]: Finished difference Result 625 states and 974 transitions. [2021-12-06 20:52:50,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:52:50,121 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 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 115 [2021-12-06 20:52:50,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:52:50,122 INFO L225 Difference]: With dead ends: 625 [2021-12-06 20:52:50,122 INFO L226 Difference]: Without dead ends: 368 [2021-12-06 20:52:50,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:52:50,123 INFO L933 BasicCegarLoop]: 208 mSDtfsCounter, 90 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:52:50,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 547 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 236 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-06 20:52:50,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-12-06 20:52:50,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 312. [2021-12-06 20:52:50,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 1.5530546623794212) internal successors, (483), 311 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:52:50,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 483 transitions. [2021-12-06 20:52:50,129 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 483 transitions. Word has length 115 [2021-12-06 20:52:50,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:52:50,129 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 483 transitions. [2021-12-06 20:52:50,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 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) [2021-12-06 20:52:50,129 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 483 transitions. [2021-12-06 20:52:50,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-12-06 20:52:50,130 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:52:50,130 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:52:50,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-06 20:52:50,131 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:52:50,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:52:50,131 INFO L85 PathProgramCache]: Analyzing trace with hash -978668583, now seen corresponding path program 1 times [2021-12-06 20:52:50,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:52:50,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507399196] [2021-12-06 20:52:50,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:52:50,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:52:50,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:52:50,202 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-06 20:52:50,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:52:50,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507399196] [2021-12-06 20:52:50,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507399196] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:52:50,202 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:52:50,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:52:50,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754070971] [2021-12-06 20:52:50,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:52:50,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:52:50,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:52:50,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:52:50,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:52:50,203 INFO L87 Difference]: Start difference. First operand 312 states and 483 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 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) [2021-12-06 20:52:51,953 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:52:52,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:52:52,221 INFO L93 Difference]: Finished difference Result 756 states and 1184 transitions. [2021-12-06 20:52:52,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:52:52,222 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 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 115 [2021-12-06 20:52:52,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:52:52,224 INFO L225 Difference]: With dead ends: 756 [2021-12-06 20:52:52,224 INFO L226 Difference]: Without dead ends: 465 [2021-12-06 20:52:52,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:52:52,225 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 135 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:52:52,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 436 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-06 20:52:52,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-12-06 20:52:52,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 342. [2021-12-06 20:52:52,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 1.5601173020527859) internal successors, (532), 341 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:52:52,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 532 transitions. [2021-12-06 20:52:52,231 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 532 transitions. Word has length 115 [2021-12-06 20:52:52,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:52:52,232 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 532 transitions. [2021-12-06 20:52:52,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 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) [2021-12-06 20:52:52,232 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 532 transitions. [2021-12-06 20:52:52,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-12-06 20:52:52,233 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:52:52,233 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:52:52,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-06 20:52:52,233 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:52:52,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:52:52,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1185621468, now seen corresponding path program 1 times [2021-12-06 20:52:52,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:52:52,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116107872] [2021-12-06 20:52:52,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:52:52,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:52:52,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:52:52,305 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-06 20:52:52,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:52:52,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116107872] [2021-12-06 20:52:52,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116107872] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:52:52,306 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:52:52,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:52:52,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505920110] [2021-12-06 20:52:52,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:52:52,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:52:52,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:52:52,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:52:52,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:52:52,307 INFO L87 Difference]: Start difference. First operand 342 states and 532 transitions. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:52:53,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:52:53,112 INFO L93 Difference]: Finished difference Result 780 states and 1219 transitions. [2021-12-06 20:52:53,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:52:53,113 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 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 121 [2021-12-06 20:52:53,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:52:53,115 INFO L225 Difference]: With dead ends: 780 [2021-12-06 20:52:53,115 INFO L226 Difference]: Without dead ends: 459 [2021-12-06 20:52:53,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:52:53,116 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 131 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 20:52:53,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 424 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 20:52:53,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-12-06 20:52:53,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 379. [2021-12-06 20:52:53,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 1.5634920634920635) internal successors, (591), 378 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:52:53,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 591 transitions. [2021-12-06 20:52:53,124 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 591 transitions. Word has length 121 [2021-12-06 20:52:53,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:52:53,124 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 591 transitions. [2021-12-06 20:52:53,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:52:53,124 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 591 transitions. [2021-12-06 20:52:53,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-12-06 20:52:53,125 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:52:53,125 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:52:53,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-06 20:52:53,125 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:52:53,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:52:53,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1466195913, now seen corresponding path program 1 times [2021-12-06 20:52:53,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:52:53,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384744471] [2021-12-06 20:52:53,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:52:53,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:52:53,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:52:53,200 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-06 20:52:53,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:52:53,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384744471] [2021-12-06 20:52:53,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384744471] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:52:53,200 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:52:53,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:52:53,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434083135] [2021-12-06 20:52:53,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:52:53,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:52:53,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:52:53,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:52:53,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:52:53,202 INFO L87 Difference]: Start difference. First operand 379 states and 591 transitions. Second operand has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:52:54,803 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:52:55,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:52:55,033 INFO L93 Difference]: Finished difference Result 824 states and 1290 transitions. [2021-12-06 20:52:55,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:52:55,033 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 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 122 [2021-12-06 20:52:55,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:52:55,035 INFO L225 Difference]: With dead ends: 824 [2021-12-06 20:52:55,035 INFO L226 Difference]: Without dead ends: 466 [2021-12-06 20:52:55,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:52:55,036 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 79 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-06 20:52:55,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 549 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-06 20:52:55,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-12-06 20:52:55,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 419. [2021-12-06 20:52:55,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 1.5645933014354068) internal successors, (654), 418 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:52:55,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 654 transitions. [2021-12-06 20:52:55,044 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 654 transitions. Word has length 122 [2021-12-06 20:52:55,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:52:55,044 INFO L470 AbstractCegarLoop]: Abstraction has 419 states and 654 transitions. [2021-12-06 20:52:55,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:52:55,045 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 654 transitions. [2021-12-06 20:52:55,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-12-06 20:52:55,045 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:52:55,045 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:52:55,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-06 20:52:55,046 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:52:55,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:52:55,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1225956167, now seen corresponding path program 1 times [2021-12-06 20:52:55,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:52:55,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473848698] [2021-12-06 20:52:55,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:52:55,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:52:55,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:52:55,123 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-06 20:52:55,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:52:55,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473848698] [2021-12-06 20:52:55,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473848698] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:52:55,123 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:52:55,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:52:55,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800475367] [2021-12-06 20:52:55,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:52:55,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:52:55,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:52:55,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:52:55,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:52:55,124 INFO L87 Difference]: Start difference. First operand 419 states and 654 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:52:56,510 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:52:56,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:52:56,697 INFO L93 Difference]: Finished difference Result 854 states and 1337 transitions. [2021-12-06 20:52:56,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:52:56,698 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 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 122 [2021-12-06 20:52:56,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:52:56,700 INFO L225 Difference]: With dead ends: 854 [2021-12-06 20:52:56,700 INFO L226 Difference]: Without dead ends: 456 [2021-12-06 20:52:56,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:52:56,701 INFO L933 BasicCegarLoop]: 260 mSDtfsCounter, 28 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-06 20:52:56,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 649 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-06 20:52:56,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-12-06 20:52:56,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 443. [2021-12-06 20:52:56,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 1.5588235294117647) internal successors, (689), 442 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:52:56,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 689 transitions. [2021-12-06 20:52:56,708 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 689 transitions. Word has length 122 [2021-12-06 20:52:56,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:52:56,708 INFO L470 AbstractCegarLoop]: Abstraction has 443 states and 689 transitions. [2021-12-06 20:52:56,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:52:56,709 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 689 transitions. [2021-12-06 20:52:56,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-06 20:52:56,709 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:52:56,710 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, 1, 1, 1, 1, 1, 1] [2021-12-06 20:52:56,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-06 20:52:56,710 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:52:56,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:52:56,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1414034971, now seen corresponding path program 1 times [2021-12-06 20:52:56,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:52:56,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728071144] [2021-12-06 20:52:56,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:52:56,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:52:56,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:52:56,777 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-06 20:52:56,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:52:56,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728071144] [2021-12-06 20:52:56,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728071144] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:52:56,777 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:52:56,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:52:56,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155512229] [2021-12-06 20:52:56,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:52:56,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:52:56,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:52:56,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:52:56,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:52:56,779 INFO L87 Difference]: Start difference. First operand 443 states and 689 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) [2021-12-06 20:52:58,785 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:52:59,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:52:59,032 INFO L93 Difference]: Finished difference Result 903 states and 1407 transitions. [2021-12-06 20:52:59,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:52:59,032 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 129 [2021-12-06 20:52:59,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:52:59,035 INFO L225 Difference]: With dead ends: 903 [2021-12-06 20:52:59,035 INFO L226 Difference]: Without dead ends: 481 [2021-12-06 20:52:59,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:52:59,036 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 61 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:52:59,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 555 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 228 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-06 20:52:59,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-12-06 20:52:59,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 446. [2021-12-06 20:52:59,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 445 states have (on average 1.5550561797752809) internal successors, (692), 445 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:52:59,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 692 transitions. [2021-12-06 20:52:59,044 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 692 transitions. Word has length 129 [2021-12-06 20:52:59,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:52:59,044 INFO L470 AbstractCegarLoop]: Abstraction has 446 states and 692 transitions. [2021-12-06 20:52:59,045 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) [2021-12-06 20:52:59,045 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 692 transitions. [2021-12-06 20:52:59,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-06 20:52:59,046 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:52:59,046 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:52:59,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-06 20:52:59,046 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:52:59,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:52:59,046 INFO L85 PathProgramCache]: Analyzing trace with hash 417072415, now seen corresponding path program 1 times [2021-12-06 20:52:59,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:52:59,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816173360] [2021-12-06 20:52:59,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:52:59,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:52:59,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:52:59,146 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-06 20:52:59,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:52:59,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816173360] [2021-12-06 20:52:59,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816173360] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:52:59,147 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:52:59,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:52:59,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051454471] [2021-12-06 20:52:59,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:52:59,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:52:59,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:52:59,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:52:59,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:52:59,148 INFO L87 Difference]: Start difference. First operand 446 states and 692 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:52:59,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:52:59,801 INFO L93 Difference]: Finished difference Result 905 states and 1408 transitions. [2021-12-06 20:52:59,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:52:59,801 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 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 136 [2021-12-06 20:52:59,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:52:59,803 INFO L225 Difference]: With dead ends: 905 [2021-12-06 20:52:59,803 INFO L226 Difference]: Without dead ends: 480 [2021-12-06 20:52:59,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:52:59,804 INFO L933 BasicCegarLoop]: 214 mSDtfsCounter, 83 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 20:52:59,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 557 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 20:52:59,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2021-12-06 20:52:59,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 446. [2021-12-06 20:52:59,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 445 states have (on average 1.552808988764045) internal successors, (691), 445 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:52:59,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 691 transitions. [2021-12-06 20:52:59,815 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 691 transitions. Word has length 136 [2021-12-06 20:52:59,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:52:59,815 INFO L470 AbstractCegarLoop]: Abstraction has 446 states and 691 transitions. [2021-12-06 20:52:59,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:52:59,816 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 691 transitions. [2021-12-06 20:52:59,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-06 20:52:59,817 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:52:59,817 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:52:59,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-06 20:52:59,817 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:52:59,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:52:59,818 INFO L85 PathProgramCache]: Analyzing trace with hash -466436575, now seen corresponding path program 1 times [2021-12-06 20:52:59,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:52:59,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573274622] [2021-12-06 20:52:59,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:52:59,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:52:59,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:52:59,908 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-06 20:52:59,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:52:59,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573274622] [2021-12-06 20:52:59,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573274622] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:52:59,908 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:52:59,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:52:59,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888887730] [2021-12-06 20:52:59,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:52:59,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:52:59,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:52:59,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:52:59,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:52:59,910 INFO L87 Difference]: Start difference. First operand 446 states and 691 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:00,997 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:53:01,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:53:01,183 INFO L93 Difference]: Finished difference Result 883 states and 1374 transitions. [2021-12-06 20:53:01,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:53:01,183 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 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 136 [2021-12-06 20:53:01,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:53:01,185 INFO L225 Difference]: With dead ends: 883 [2021-12-06 20:53:01,185 INFO L226 Difference]: Without dead ends: 458 [2021-12-06 20:53:01,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:53:01,186 INFO L933 BasicCegarLoop]: 260 mSDtfsCounter, 33 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:53:01,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 649 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-06 20:53:01,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-12-06 20:53:01,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 446. [2021-12-06 20:53:01,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 445 states have (on average 1.550561797752809) internal successors, (690), 445 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:01,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 690 transitions. [2021-12-06 20:53:01,201 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 690 transitions. Word has length 136 [2021-12-06 20:53:01,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:53:01,201 INFO L470 AbstractCegarLoop]: Abstraction has 446 states and 690 transitions. [2021-12-06 20:53:01,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:01,201 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 690 transitions. [2021-12-06 20:53:01,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-12-06 20:53:01,202 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:53:01,202 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, 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] [2021-12-06 20:53:01,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-06 20:53:01,202 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:53:01,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:53:01,203 INFO L85 PathProgramCache]: Analyzing trace with hash 204789508, now seen corresponding path program 1 times [2021-12-06 20:53:01,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:53:01,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607694909] [2021-12-06 20:53:01,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:53:01,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:53:01,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:53:01,275 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-06 20:53:01,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:53:01,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607694909] [2021-12-06 20:53:01,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607694909] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:53:01,276 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:53:01,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:53:01,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056528073] [2021-12-06 20:53:01,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:53:01,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:53:01,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:53:01,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:53:01,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:53:01,277 INFO L87 Difference]: Start difference. First operand 446 states and 690 transitions. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:03,284 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:53:03,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:53:03,552 INFO L93 Difference]: Finished difference Result 988 states and 1534 transitions. [2021-12-06 20:53:03,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:53:03,552 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 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 142 [2021-12-06 20:53:03,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:53:03,555 INFO L225 Difference]: With dead ends: 988 [2021-12-06 20:53:03,555 INFO L226 Difference]: Without dead ends: 563 [2021-12-06 20:53:03,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:53:03,556 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 138 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 45 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:53:03,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 456 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 248 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-06 20:53:03,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-12-06 20:53:03,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 476. [2021-12-06 20:53:03,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 1.5410526315789475) internal successors, (732), 475 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:03,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 732 transitions. [2021-12-06 20:53:03,563 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 732 transitions. Word has length 142 [2021-12-06 20:53:03,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:53:03,564 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 732 transitions. [2021-12-06 20:53:03,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:03,564 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 732 transitions. [2021-12-06 20:53:03,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-12-06 20:53:03,565 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:53:03,565 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, 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] [2021-12-06 20:53:03,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-06 20:53:03,565 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:53:03,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:53:03,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1261572010, now seen corresponding path program 1 times [2021-12-06 20:53:03,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:53:03,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122120166] [2021-12-06 20:53:03,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:53:03,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:53:03,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:53:03,641 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-06 20:53:03,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:53:03,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122120166] [2021-12-06 20:53:03,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122120166] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:53:03,642 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:53:03,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:53:03,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015569168] [2021-12-06 20:53:03,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:53:03,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:53:03,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:53:03,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:53:03,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:53:03,643 INFO L87 Difference]: Start difference. First operand 476 states and 732 transitions. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:04,670 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:53:04,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:53:04,934 INFO L93 Difference]: Finished difference Result 1008 states and 1554 transitions. [2021-12-06 20:53:04,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:53:04,935 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 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 [2021-12-06 20:53:04,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:53:04,937 INFO L225 Difference]: With dead ends: 1008 [2021-12-06 20:53:04,937 INFO L226 Difference]: Without dead ends: 553 [2021-12-06 20:53:04,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:53:04,938 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 137 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:53:04,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 424 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-06 20:53:04,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-12-06 20:53:04,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 476. [2021-12-06 20:53:04,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 1.528421052631579) internal successors, (726), 475 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:04,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 726 transitions. [2021-12-06 20:53:04,946 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 726 transitions. Word has length 143 [2021-12-06 20:53:04,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:53:04,946 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 726 transitions. [2021-12-06 20:53:04,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:04,946 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 726 transitions. [2021-12-06 20:53:04,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-12-06 20:53:04,947 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:53:04,947 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, 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] [2021-12-06 20:53:04,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-06 20:53:04,947 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:53:04,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:53:04,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1455297220, now seen corresponding path program 1 times [2021-12-06 20:53:04,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:53:04,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489413604] [2021-12-06 20:53:04,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:53:04,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:53:04,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:53:05,033 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-06 20:53:05,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:53:05,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489413604] [2021-12-06 20:53:05,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489413604] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:53:05,033 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:53:05,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:53:05,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84730384] [2021-12-06 20:53:05,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:53:05,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:53:05,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:53:05,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:53:05,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:53:05,034 INFO L87 Difference]: Start difference. First operand 476 states and 726 transitions. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:06,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:53:06,102 INFO L93 Difference]: Finished difference Result 963 states and 1474 transitions. [2021-12-06 20:53:06,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:53:06,102 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 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 144 [2021-12-06 20:53:06,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:53:06,104 INFO L225 Difference]: With dead ends: 963 [2021-12-06 20:53:06,104 INFO L226 Difference]: Without dead ends: 508 [2021-12-06 20:53:06,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:53:06,105 INFO L933 BasicCegarLoop]: 222 mSDtfsCounter, 73 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:53:06,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 575 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-06 20:53:06,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-12-06 20:53:06,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 476. [2021-12-06 20:53:06,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 1.5263157894736843) internal successors, (725), 475 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:06,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 725 transitions. [2021-12-06 20:53:06,113 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 725 transitions. Word has length 144 [2021-12-06 20:53:06,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:53:06,113 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 725 transitions. [2021-12-06 20:53:06,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:06,113 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 725 transitions. [2021-12-06 20:53:06,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-12-06 20:53:06,114 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:53:06,114 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, 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] [2021-12-06 20:53:06,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-06 20:53:06,114 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:53:06,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:53:06,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1532527678, now seen corresponding path program 1 times [2021-12-06 20:53:06,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:53:06,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507348655] [2021-12-06 20:53:06,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:53:06,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:53:06,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:53:06,186 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-06 20:53:06,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:53:06,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507348655] [2021-12-06 20:53:06,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507348655] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:53:06,186 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:53:06,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:53:06,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596368810] [2021-12-06 20:53:06,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:53:06,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:53:06,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:53:06,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:53:06,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:53:06,187 INFO L87 Difference]: Start difference. First operand 476 states and 725 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:06,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:53:06,248 INFO L93 Difference]: Finished difference Result 1383 states and 2123 transitions. [2021-12-06 20:53:06,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:53:06,248 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 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 144 [2021-12-06 20:53:06,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:53:06,252 INFO L225 Difference]: With dead ends: 1383 [2021-12-06 20:53:06,252 INFO L226 Difference]: Without dead ends: 928 [2021-12-06 20:53:06,252 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 [2021-12-06 20:53:06,253 INFO L933 BasicCegarLoop]: 257 mSDtfsCounter, 154 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:53:06,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 446 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:53:06,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2021-12-06 20:53:06,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 928. [2021-12-06 20:53:06,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 927 states have (on average 1.5113268608414239) internal successors, (1401), 927 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:06,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 1401 transitions. [2021-12-06 20:53:06,266 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 1401 transitions. Word has length 144 [2021-12-06 20:53:06,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:53:06,267 INFO L470 AbstractCegarLoop]: Abstraction has 928 states and 1401 transitions. [2021-12-06 20:53:06,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:06,267 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 1401 transitions. [2021-12-06 20:53:06,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-12-06 20:53:06,268 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:53:06,268 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, 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] [2021-12-06 20:53:06,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-06 20:53:06,269 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:53:06,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:53:06,269 INFO L85 PathProgramCache]: Analyzing trace with hash -500866368, now seen corresponding path program 1 times [2021-12-06 20:53:06,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:53:06,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486061447] [2021-12-06 20:53:06,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:53:06,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:53:06,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:53:06,331 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-06 20:53:06,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:53:06,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486061447] [2021-12-06 20:53:06,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486061447] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:53:06,331 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:53:06,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:53:06,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745539910] [2021-12-06 20:53:06,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:53:06,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:53:06,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:53:06,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:53:06,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:53:06,332 INFO L87 Difference]: Start difference. First operand 928 states and 1401 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:06,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:53:06,374 INFO L93 Difference]: Finished difference Result 1862 states and 2814 transitions. [2021-12-06 20:53:06,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:53:06,375 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 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 144 [2021-12-06 20:53:06,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:53:06,379 INFO L225 Difference]: With dead ends: 1862 [2021-12-06 20:53:06,379 INFO L226 Difference]: Without dead ends: 955 [2021-12-06 20:53:06,380 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 [2021-12-06 20:53:06,380 INFO L933 BasicCegarLoop]: 245 mSDtfsCounter, 15 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:53:06,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 434 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:53:06,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2021-12-06 20:53:06,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 955. [2021-12-06 20:53:06,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 955 states, 954 states have (on average 1.5052410901467506) internal successors, (1436), 954 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:06,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 1436 transitions. [2021-12-06 20:53:06,404 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 1436 transitions. Word has length 144 [2021-12-06 20:53:06,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:53:06,404 INFO L470 AbstractCegarLoop]: Abstraction has 955 states and 1436 transitions. [2021-12-06 20:53:06,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:06,405 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 1436 transitions. [2021-12-06 20:53:06,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-12-06 20:53:06,407 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:53:06,407 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, 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] [2021-12-06 20:53:06,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-06 20:53:06,407 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:53:06,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:53:06,408 INFO L85 PathProgramCache]: Analyzing trace with hash 360967234, now seen corresponding path program 1 times [2021-12-06 20:53:06,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:53:06,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89941382] [2021-12-06 20:53:06,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:53:06,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:53:06,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:53:06,477 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2021-12-06 20:53:06,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:53:06,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89941382] [2021-12-06 20:53:06,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89941382] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:53:06,477 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:53:06,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:53:06,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595390044] [2021-12-06 20:53:06,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:53:06,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:53:06,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:53:06,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:53:06,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:53:06,478 INFO L87 Difference]: Start difference. First operand 955 states and 1436 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 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) [2021-12-06 20:53:06,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:53:06,516 INFO L93 Difference]: Finished difference Result 1891 states and 2850 transitions. [2021-12-06 20:53:06,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:53:06,516 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 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 144 [2021-12-06 20:53:06,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:53:06,521 INFO L225 Difference]: With dead ends: 1891 [2021-12-06 20:53:06,521 INFO L226 Difference]: Without dead ends: 957 [2021-12-06 20:53:06,523 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 [2021-12-06 20:53:06,523 INFO L933 BasicCegarLoop]: 233 mSDtfsCounter, 4 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:53:06,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 413 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:53:06,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2021-12-06 20:53:06,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 957. [2021-12-06 20:53:06,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 1.50418410041841) internal successors, (1438), 956 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:06,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 1438 transitions. [2021-12-06 20:53:06,545 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 1438 transitions. Word has length 144 [2021-12-06 20:53:06,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:53:06,546 INFO L470 AbstractCegarLoop]: Abstraction has 957 states and 1438 transitions. [2021-12-06 20:53:06,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 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) [2021-12-06 20:53:06,546 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 1438 transitions. [2021-12-06 20:53:06,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-06 20:53:06,548 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:53:06,548 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, 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] [2021-12-06 20:53:06,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-06 20:53:06,548 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:53:06,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:53:06,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1469229848, now seen corresponding path program 1 times [2021-12-06 20:53:06,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:53:06,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506887139] [2021-12-06 20:53:06,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:53:06,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:53:06,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:53:06,642 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-06 20:53:06,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:53:06,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506887139] [2021-12-06 20:53:06,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506887139] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:53:06,643 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:53:06,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:53:06,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129448139] [2021-12-06 20:53:06,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:53:06,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:53:06,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:53:06,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:53:06,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:53:06,644 INFO L87 Difference]: Start difference. First operand 957 states and 1438 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 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) [2021-12-06 20:53:06,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:53:06,721 INFO L93 Difference]: Finished difference Result 2343 states and 3547 transitions. [2021-12-06 20:53:06,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:53:06,721 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 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 146 [2021-12-06 20:53:06,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:53:06,727 INFO L225 Difference]: With dead ends: 2343 [2021-12-06 20:53:06,727 INFO L226 Difference]: Without dead ends: 1409 [2021-12-06 20:53:06,728 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 [2021-12-06 20:53:06,728 INFO L933 BasicCegarLoop]: 405 mSDtfsCounter, 159 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 594 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:53:06,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 594 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:53:06,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1409 states. [2021-12-06 20:53:06,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1409 to 1409. [2021-12-06 20:53:06,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1409 states, 1408 states have (on average 1.5014204545454546) internal successors, (2114), 1408 states have internal predecessors, (2114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:06,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1409 states to 1409 states and 2114 transitions. [2021-12-06 20:53:06,750 INFO L78 Accepts]: Start accepts. Automaton has 1409 states and 2114 transitions. Word has length 146 [2021-12-06 20:53:06,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:53:06,750 INFO L470 AbstractCegarLoop]: Abstraction has 1409 states and 2114 transitions. [2021-12-06 20:53:06,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 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) [2021-12-06 20:53:06,751 INFO L276 IsEmpty]: Start isEmpty. Operand 1409 states and 2114 transitions. [2021-12-06 20:53:06,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-12-06 20:53:06,752 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:53:06,753 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, 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] [2021-12-06 20:53:06,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-12-06 20:53:06,753 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:53:06,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:53:06,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1434763751, now seen corresponding path program 1 times [2021-12-06 20:53:06,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:53:06,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839379363] [2021-12-06 20:53:06,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:53:06,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:53:06,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:53:06,834 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 159 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-12-06 20:53:06,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:53:06,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839379363] [2021-12-06 20:53:06,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839379363] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:53:06,835 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:53:06,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:53:06,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028991477] [2021-12-06 20:53:06,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:53:06,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:53:06,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:53:06,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:53:06,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:53:06,836 INFO L87 Difference]: Start difference. First operand 1409 states and 2114 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) [2021-12-06 20:53:07,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:53:07,947 INFO L93 Difference]: Finished difference Result 2948 states and 4429 transitions. [2021-12-06 20:53:07,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:53:07,947 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 175 [2021-12-06 20:53:07,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:53:07,953 INFO L225 Difference]: With dead ends: 2948 [2021-12-06 20:53:07,953 INFO L226 Difference]: Without dead ends: 1562 [2021-12-06 20:53:07,954 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 [2021-12-06 20:53:07,955 INFO L933 BasicCegarLoop]: 268 mSDtfsCounter, 42 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 665 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:53:07,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 665 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-06 20:53:07,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1562 states. [2021-12-06 20:53:07,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1562 to 1493. [2021-12-06 20:53:07,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1493 states, 1492 states have (on average 1.5033512064343164) internal successors, (2243), 1492 states have internal predecessors, (2243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:07,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1493 states to 1493 states and 2243 transitions. [2021-12-06 20:53:07,982 INFO L78 Accepts]: Start accepts. Automaton has 1493 states and 2243 transitions. Word has length 175 [2021-12-06 20:53:07,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:53:07,982 INFO L470 AbstractCegarLoop]: Abstraction has 1493 states and 2243 transitions. [2021-12-06 20:53:07,982 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) [2021-12-06 20:53:07,982 INFO L276 IsEmpty]: Start isEmpty. Operand 1493 states and 2243 transitions. [2021-12-06 20:53:07,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-12-06 20:53:07,984 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:53:07,984 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, 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] [2021-12-06 20:53:07,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-06 20:53:07,985 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:53:07,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:53:07,985 INFO L85 PathProgramCache]: Analyzing trace with hash -866603135, now seen corresponding path program 1 times [2021-12-06 20:53:07,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:53:07,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864865924] [2021-12-06 20:53:07,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:53:07,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:53:08,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:53:08,063 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 211 proven. 0 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2021-12-06 20:53:08,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:53:08,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864865924] [2021-12-06 20:53:08,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864865924] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:53:08,064 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:53:08,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:53:08,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931858619] [2021-12-06 20:53:08,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:53:08,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:53:08,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:53:08,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:53:08,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:53:08,065 INFO L87 Difference]: Start difference. First operand 1493 states and 2243 transitions. Second operand has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:09,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:53:09,306 INFO L93 Difference]: Finished difference Result 3186 states and 4762 transitions. [2021-12-06 20:53:09,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:53:09,306 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 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 [2021-12-06 20:53:09,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:53:09,312 INFO L225 Difference]: With dead ends: 3186 [2021-12-06 20:53:09,312 INFO L226 Difference]: Without dead ends: 1716 [2021-12-06 20:53:09,314 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 [2021-12-06 20:53:09,314 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 149 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:53:09,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 426 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-06 20:53:09,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2021-12-06 20:53:09,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1493. [2021-12-06 20:53:09,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1493 states, 1492 states have (on average 1.4892761394101877) internal successors, (2222), 1492 states have internal predecessors, (2222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:09,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1493 states to 1493 states and 2222 transitions. [2021-12-06 20:53:09,346 INFO L78 Accepts]: Start accepts. Automaton has 1493 states and 2222 transitions. Word has length 189 [2021-12-06 20:53:09,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:53:09,346 INFO L470 AbstractCegarLoop]: Abstraction has 1493 states and 2222 transitions. [2021-12-06 20:53:09,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:09,346 INFO L276 IsEmpty]: Start isEmpty. Operand 1493 states and 2222 transitions. [2021-12-06 20:53:09,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-12-06 20:53:09,348 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:53:09,348 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:53:09,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-12-06 20:53:09,349 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:53:09,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:53:09,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1420236190, now seen corresponding path program 1 times [2021-12-06 20:53:09,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:53:09,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550174382] [2021-12-06 20:53:09,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:53:09,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:53:09,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:53:09,444 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 252 proven. 38 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-06 20:53:09,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:53:09,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550174382] [2021-12-06 20:53:09,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550174382] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:53:09,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914227774] [2021-12-06 20:53:09,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:53:09,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:53:09,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe631736-26b3-4f8f-aaa4-7944ca0f22c5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:53:09,445 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe631736-26b3-4f8f-aaa4-7944ca0f22c5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:53:09,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe631736-26b3-4f8f-aaa4-7944ca0f22c5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 20:53:09,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:53:09,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 1185 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 20:53:09,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:53:10,016 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 257 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-12-06 20:53:10,016 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:53:10,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914227774] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:53:10,017 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 20:53:10,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-06 20:53:10,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442699671] [2021-12-06 20:53:10,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:53:10,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:53:10,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:53:10,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:53:10,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 20:53:10,018 INFO L87 Difference]: Start difference. First operand 1493 states and 2222 transitions. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 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) [2021-12-06 20:53:10,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:53:10,088 INFO L93 Difference]: Finished difference Result 3444 states and 5152 transitions. [2021-12-06 20:53:10,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:53:10,088 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 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 197 [2021-12-06 20:53:10,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:53:10,095 INFO L225 Difference]: With dead ends: 3444 [2021-12-06 20:53:10,096 INFO L226 Difference]: Without dead ends: 1974 [2021-12-06 20:53:10,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 20:53:10,097 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 166 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:53:10,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 387 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:53:10,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1974 states. [2021-12-06 20:53:10,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1974 to 1974. [2021-12-06 20:53:10,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1974 states, 1973 states have (on average 1.490116573745565) internal successors, (2940), 1973 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:10,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1974 states to 1974 states and 2940 transitions. [2021-12-06 20:53:10,128 INFO L78 Accepts]: Start accepts. Automaton has 1974 states and 2940 transitions. Word has length 197 [2021-12-06 20:53:10,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:53:10,128 INFO L470 AbstractCegarLoop]: Abstraction has 1974 states and 2940 transitions. [2021-12-06 20:53:10,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 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) [2021-12-06 20:53:10,129 INFO L276 IsEmpty]: Start isEmpty. Operand 1974 states and 2940 transitions. [2021-12-06 20:53:10,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-12-06 20:53:10,131 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:53:10,131 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:53:10,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe631736-26b3-4f8f-aaa4-7944ca0f22c5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 20:53:10,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe631736-26b3-4f8f-aaa4-7944ca0f22c5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-12-06 20:53:10,333 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:53:10,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:53:10,334 INFO L85 PathProgramCache]: Analyzing trace with hash 2107016587, now seen corresponding path program 1 times [2021-12-06 20:53:10,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:53:10,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213120880] [2021-12-06 20:53:10,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:53:10,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:53:10,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:53:10,465 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 182 proven. 0 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2021-12-06 20:53:10,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:53:10,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213120880] [2021-12-06 20:53:10,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213120880] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:53:10,465 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:53:10,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:53:10,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911008153] [2021-12-06 20:53:10,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:53:10,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:53:10,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:53:10,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:53:10,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:53:10,466 INFO L87 Difference]: Start difference. First operand 1974 states and 2940 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) [2021-12-06 20:53:10,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:53:10,538 INFO L93 Difference]: Finished difference Result 4406 states and 6588 transitions. [2021-12-06 20:53:10,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:53:10,538 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 199 [2021-12-06 20:53:10,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:53:10,547 INFO L225 Difference]: With dead ends: 4406 [2021-12-06 20:53:10,547 INFO L226 Difference]: Without dead ends: 2455 [2021-12-06 20:53:10,548 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 [2021-12-06 20:53:10,549 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 163 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:53:10,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 386 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:53:10,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2455 states. [2021-12-06 20:53:10,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2455 to 2455. [2021-12-06 20:53:10,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2455 states, 2454 states have (on average 1.4910350448247758) internal successors, (3659), 2454 states have internal predecessors, (3659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:10,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2455 states to 2455 states and 3659 transitions. [2021-12-06 20:53:10,598 INFO L78 Accepts]: Start accepts. Automaton has 2455 states and 3659 transitions. Word has length 199 [2021-12-06 20:53:10,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:53:10,598 INFO L470 AbstractCegarLoop]: Abstraction has 2455 states and 3659 transitions. [2021-12-06 20:53:10,598 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) [2021-12-06 20:53:10,598 INFO L276 IsEmpty]: Start isEmpty. Operand 2455 states and 3659 transitions. [2021-12-06 20:53:10,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-12-06 20:53:10,601 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:53:10,602 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:53:10,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-12-06 20:53:10,602 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:53:10,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:53:10,602 INFO L85 PathProgramCache]: Analyzing trace with hash 447893990, now seen corresponding path program 1 times [2021-12-06 20:53:10,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:53:10,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631223825] [2021-12-06 20:53:10,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:53:10,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:53:10,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:53:10,706 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 271 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-12-06 20:53:10,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:53:10,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631223825] [2021-12-06 20:53:10,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631223825] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:53:10,707 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:53:10,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:53:10,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913959834] [2021-12-06 20:53:10,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:53:10,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:53:10,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:53:10,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:53:10,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:53:10,708 INFO L87 Difference]: Start difference. First operand 2455 states and 3659 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 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) [2021-12-06 20:53:10,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:53:10,797 INFO L93 Difference]: Finished difference Result 5368 states and 8026 transitions. [2021-12-06 20:53:10,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:53:10,797 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 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 [2021-12-06 20:53:10,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:53:10,808 INFO L225 Difference]: With dead ends: 5368 [2021-12-06 20:53:10,808 INFO L226 Difference]: Without dead ends: 2936 [2021-12-06 20:53:10,810 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 [2021-12-06 20:53:10,810 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 170 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:53:10,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 385 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:53:10,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2936 states. [2021-12-06 20:53:10,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2936 to 2936. [2021-12-06 20:53:10,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2936 states, 2935 states have (on average 1.4919931856899489) internal successors, (4379), 2935 states have internal predecessors, (4379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:10,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2936 states to 2936 states and 4379 transitions. [2021-12-06 20:53:10,856 INFO L78 Accepts]: Start accepts. Automaton has 2936 states and 4379 transitions. Word has length 238 [2021-12-06 20:53:10,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:53:10,857 INFO L470 AbstractCegarLoop]: Abstraction has 2936 states and 4379 transitions. [2021-12-06 20:53:10,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 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) [2021-12-06 20:53:10,857 INFO L276 IsEmpty]: Start isEmpty. Operand 2936 states and 4379 transitions. [2021-12-06 20:53:10,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-12-06 20:53:10,860 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:53:10,860 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:53:10,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-12-06 20:53:10,861 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:53:10,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:53:10,861 INFO L85 PathProgramCache]: Analyzing trace with hash 230867452, now seen corresponding path program 1 times [2021-12-06 20:53:10,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:53:10,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911682985] [2021-12-06 20:53:10,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:53:10,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:53:10,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:53:10,966 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 271 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-12-06 20:53:10,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:53:10,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911682985] [2021-12-06 20:53:10,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911682985] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:53:10,966 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:53:10,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:53:10,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444916863] [2021-12-06 20:53:10,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:53:10,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:53:10,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:53:10,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:53:10,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:53:10,967 INFO L87 Difference]: Start difference. First operand 2936 states and 4379 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 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) [2021-12-06 20:53:11,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:53:11,049 INFO L93 Difference]: Finished difference Result 6330 states and 9466 transitions. [2021-12-06 20:53:11,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:53:11,049 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 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 240 [2021-12-06 20:53:11,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:53:11,056 INFO L225 Difference]: With dead ends: 6330 [2021-12-06 20:53:11,056 INFO L226 Difference]: Without dead ends: 3417 [2021-12-06 20:53:11,059 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 [2021-12-06 20:53:11,059 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 171 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:53:11,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 384 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:53:11,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3417 states. [2021-12-06 20:53:11,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3417 to 3417. [2021-12-06 20:53:11,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3417 states, 3416 states have (on average 1.4929742388758782) internal successors, (5100), 3416 states have internal predecessors, (5100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:11,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3417 states to 3417 states and 5100 transitions. [2021-12-06 20:53:11,117 INFO L78 Accepts]: Start accepts. Automaton has 3417 states and 5100 transitions. Word has length 240 [2021-12-06 20:53:11,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:53:11,117 INFO L470 AbstractCegarLoop]: Abstraction has 3417 states and 5100 transitions. [2021-12-06 20:53:11,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 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) [2021-12-06 20:53:11,117 INFO L276 IsEmpty]: Start isEmpty. Operand 3417 states and 5100 transitions. [2021-12-06 20:53:11,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2021-12-06 20:53:11,121 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:53:11,121 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:53:11,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-12-06 20:53:11,122 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:53:11,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:53:11,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1840467843, now seen corresponding path program 1 times [2021-12-06 20:53:11,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:53:11,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056496551] [2021-12-06 20:53:11,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:53:11,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:53:11,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:53:11,249 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 181 proven. 0 refuted. 0 times theorem prover too weak. 513 trivial. 0 not checked. [2021-12-06 20:53:11,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:53:11,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056496551] [2021-12-06 20:53:11,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056496551] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:53:11,250 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:53:11,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:53:11,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048424752] [2021-12-06 20:53:11,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:53:11,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:53:11,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:53:11,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:53:11,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:53:11,251 INFO L87 Difference]: Start difference. First operand 3417 states and 5100 transitions. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 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) [2021-12-06 20:53:11,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:53:11,325 INFO L93 Difference]: Finished difference Result 7284 states and 10895 transitions. [2021-12-06 20:53:11,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:53:11,326 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 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 272 [2021-12-06 20:53:11,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:53:11,331 INFO L225 Difference]: With dead ends: 7284 [2021-12-06 20:53:11,331 INFO L226 Difference]: Without dead ends: 3890 [2021-12-06 20:53:11,334 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 [2021-12-06 20:53:11,334 INFO L933 BasicCegarLoop]: 404 mSDtfsCounter, 152 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:53:11,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 593 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:53:11,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3890 states. [2021-12-06 20:53:11,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3890 to 3890. [2021-12-06 20:53:11,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3890 states, 3889 states have (on average 1.4924145024427873) internal successors, (5804), 3889 states have internal predecessors, (5804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:11,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3890 states to 3890 states and 5804 transitions. [2021-12-06 20:53:11,392 INFO L78 Accepts]: Start accepts. Automaton has 3890 states and 5804 transitions. Word has length 272 [2021-12-06 20:53:11,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:53:11,392 INFO L470 AbstractCegarLoop]: Abstraction has 3890 states and 5804 transitions. [2021-12-06 20:53:11,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 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) [2021-12-06 20:53:11,393 INFO L276 IsEmpty]: Start isEmpty. Operand 3890 states and 5804 transitions. [2021-12-06 20:53:11,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2021-12-06 20:53:11,397 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:53:11,397 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:53:11,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-12-06 20:53:11,398 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:53:11,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:53:11,398 INFO L85 PathProgramCache]: Analyzing trace with hash 943074565, now seen corresponding path program 1 times [2021-12-06 20:53:11,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:53:11,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242104695] [2021-12-06 20:53:11,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:53:11,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:53:11,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:53:11,512 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 330 proven. 0 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-12-06 20:53:11,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:53:11,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242104695] [2021-12-06 20:53:11,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242104695] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:53:11,512 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:53:11,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:53:11,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946087507] [2021-12-06 20:53:11,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:53:11,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:53:11,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:53:11,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:53:11,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:53:11,514 INFO L87 Difference]: Start difference. First operand 3890 states and 5804 transitions. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:11,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:53:11,621 INFO L93 Difference]: Finished difference Result 8205 states and 12267 transitions. [2021-12-06 20:53:11,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:53:11,622 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 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 [2021-12-06 20:53:11,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:53:11,628 INFO L225 Difference]: With dead ends: 8205 [2021-12-06 20:53:11,628 INFO L226 Difference]: Without dead ends: 4338 [2021-12-06 20:53:11,631 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 [2021-12-06 20:53:11,632 INFO L933 BasicCegarLoop]: 407 mSDtfsCounter, 161 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:53:11,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 596 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:53:11,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4338 states. [2021-12-06 20:53:11,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4338 to 4338. [2021-12-06 20:53:11,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4338 states, 4337 states have (on average 1.4913534701406501) internal successors, (6468), 4337 states have internal predecessors, (6468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:11,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4338 states to 4338 states and 6468 transitions. [2021-12-06 20:53:11,696 INFO L78 Accepts]: Start accepts. Automaton has 4338 states and 6468 transitions. Word has length 272 [2021-12-06 20:53:11,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:53:11,697 INFO L470 AbstractCegarLoop]: Abstraction has 4338 states and 6468 transitions. [2021-12-06 20:53:11,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:11,697 INFO L276 IsEmpty]: Start isEmpty. Operand 4338 states and 6468 transitions. [2021-12-06 20:53:11,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2021-12-06 20:53:11,703 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:53:11,703 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 9, 9, 8, 8, 7, 7, 6, 6, 6, 6, 6, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:53:11,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-12-06 20:53:11,703 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:53:11,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:53:11,703 INFO L85 PathProgramCache]: Analyzing trace with hash 727620858, now seen corresponding path program 1 times [2021-12-06 20:53:11,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:53:11,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524476483] [2021-12-06 20:53:11,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:53:11,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:53:11,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:53:11,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1161 backedges. 434 proven. 0 refuted. 0 times theorem prover too weak. 727 trivial. 0 not checked. [2021-12-06 20:53:11,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:53:11,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524476483] [2021-12-06 20:53:11,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524476483] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:53:11,847 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:53:11,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:53:11,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661038782] [2021-12-06 20:53:11,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:53:11,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:53:11,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:53:11,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:53:11,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:53:11,848 INFO L87 Difference]: Start difference. First operand 4338 states and 6468 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 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) [2021-12-06 20:53:11,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:53:11,941 INFO L93 Difference]: Finished difference Result 9134 states and 13644 transitions. [2021-12-06 20:53:11,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:53:11,941 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 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 347 [2021-12-06 20:53:11,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:53:11,947 INFO L225 Difference]: With dead ends: 9134 [2021-12-06 20:53:11,947 INFO L226 Difference]: Without dead ends: 4819 [2021-12-06 20:53:11,950 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 [2021-12-06 20:53:11,950 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 160 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:53:11,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 381 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:53:11,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4819 states. [2021-12-06 20:53:12,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4819 to 4819. [2021-12-06 20:53:12,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4819 states, 4818 states have (on average 1.4927355749273556) internal successors, (7192), 4818 states have internal predecessors, (7192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:12,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4819 states to 4819 states and 7192 transitions. [2021-12-06 20:53:12,031 INFO L78 Accepts]: Start accepts. Automaton has 4819 states and 7192 transitions. Word has length 347 [2021-12-06 20:53:12,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:53:12,031 INFO L470 AbstractCegarLoop]: Abstraction has 4819 states and 7192 transitions. [2021-12-06 20:53:12,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 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) [2021-12-06 20:53:12,031 INFO L276 IsEmpty]: Start isEmpty. Operand 4819 states and 7192 transitions. [2021-12-06 20:53:12,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2021-12-06 20:53:12,040 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:53:12,040 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 10, 10, 9, 9, 8, 8, 7, 7, 7, 7, 7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:53:12,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-12-06 20:53:12,040 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:53:12,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:53:12,041 INFO L85 PathProgramCache]: Analyzing trace with hash 54456075, now seen corresponding path program 1 times [2021-12-06 20:53:12,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:53:12,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249357507] [2021-12-06 20:53:12,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:53:12,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:53:12,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:53:12,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1443 backedges. 501 proven. 0 refuted. 0 times theorem prover too weak. 942 trivial. 0 not checked. [2021-12-06 20:53:12,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:53:12,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249357507] [2021-12-06 20:53:12,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249357507] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:53:12,236 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:53:12,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:53:12,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156578440] [2021-12-06 20:53:12,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:53:12,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:53:12,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:53:12,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:53:12,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:53:12,238 INFO L87 Difference]: Start difference. First operand 4819 states and 7192 transitions. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 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) [2021-12-06 20:53:12,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:53:12,331 INFO L93 Difference]: Finished difference Result 10096 states and 15092 transitions. [2021-12-06 20:53:12,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:53:12,331 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 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 388 [2021-12-06 20:53:12,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:53:12,340 INFO L225 Difference]: With dead ends: 10096 [2021-12-06 20:53:12,340 INFO L226 Difference]: Without dead ends: 5300 [2021-12-06 20:53:12,345 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 [2021-12-06 20:53:12,345 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 161 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:53:12,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 380 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:53:12,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5300 states. [2021-12-06 20:53:12,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5300 to 5300. [2021-12-06 20:53:12,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5300 states, 5299 states have (on average 1.4940554821664465) internal successors, (7917), 5299 states have internal predecessors, (7917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:12,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5300 states to 5300 states and 7917 transitions. [2021-12-06 20:53:12,444 INFO L78 Accepts]: Start accepts. Automaton has 5300 states and 7917 transitions. Word has length 388 [2021-12-06 20:53:12,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:53:12,444 INFO L470 AbstractCegarLoop]: Abstraction has 5300 states and 7917 transitions. [2021-12-06 20:53:12,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 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) [2021-12-06 20:53:12,445 INFO L276 IsEmpty]: Start isEmpty. Operand 5300 states and 7917 transitions. [2021-12-06 20:53:12,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2021-12-06 20:53:12,451 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:53:12,452 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 10, 10, 9, 9, 8, 8, 7, 7, 7, 7, 7, 6, 6, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:53:12,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-12-06 20:53:12,452 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:53:12,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:53:12,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1652971603, now seen corresponding path program 1 times [2021-12-06 20:53:12,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:53:12,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639582380] [2021-12-06 20:53:12,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:53:12,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:53:12,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:53:12,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 285 proven. 0 refuted. 0 times theorem prover too weak. 1160 trivial. 0 not checked. [2021-12-06 20:53:12,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:53:12,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639582380] [2021-12-06 20:53:12,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639582380] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:53:12,609 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:53:12,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:53:12,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109624938] [2021-12-06 20:53:12,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:53:12,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:53:12,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:53:12,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:53:12,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:53:12,610 INFO L87 Difference]: Start difference. First operand 5300 states and 7917 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 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) [2021-12-06 20:53:12,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:53:12,707 INFO L93 Difference]: Finished difference Result 11051 states and 16531 transitions. [2021-12-06 20:53:12,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:53:12,708 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 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 395 [2021-12-06 20:53:12,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:53:12,713 INFO L225 Difference]: With dead ends: 11051 [2021-12-06 20:53:12,713 INFO L226 Difference]: Without dead ends: 5774 [2021-12-06 20:53:12,717 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 [2021-12-06 20:53:12,717 INFO L933 BasicCegarLoop]: 404 mSDtfsCounter, 150 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:53:12,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 593 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:53:12,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5774 states. [2021-12-06 20:53:12,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5774 to 5774. [2021-12-06 20:53:12,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5774 states, 5773 states have (on average 1.4935042438939892) internal successors, (8622), 5773 states have internal predecessors, (8622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:12,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5774 states to 5774 states and 8622 transitions. [2021-12-06 20:53:12,830 INFO L78 Accepts]: Start accepts. Automaton has 5774 states and 8622 transitions. Word has length 395 [2021-12-06 20:53:12,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:53:12,830 INFO L470 AbstractCegarLoop]: Abstraction has 5774 states and 8622 transitions. [2021-12-06 20:53:12,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 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) [2021-12-06 20:53:12,830 INFO L276 IsEmpty]: Start isEmpty. Operand 5774 states and 8622 transitions. [2021-12-06 20:53:12,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2021-12-06 20:53:12,840 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:53:12,840 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 12, 12, 11, 11, 10, 10, 9, 9, 9, 9, 9, 8, 8, 7, 7, 6, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:53:12,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-12-06 20:53:12,841 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:53:12,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:53:12,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1960737092, now seen corresponding path program 1 times [2021-12-06 20:53:12,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:53:12,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515191709] [2021-12-06 20:53:12,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:53:12,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:53:12,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:53:13,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2119 backedges. 641 proven. 0 refuted. 0 times theorem prover too weak. 1478 trivial. 0 not checked. [2021-12-06 20:53:13,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:53:13,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515191709] [2021-12-06 20:53:13,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515191709] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:53:13,040 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:53:13,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:53:13,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754826708] [2021-12-06 20:53:13,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:53:13,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:53:13,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:53:13,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:53:13,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:53:13,042 INFO L87 Difference]: Start difference. First operand 5774 states and 8622 transitions. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:13,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:53:13,178 INFO L93 Difference]: Finished difference Result 12006 states and 17952 transitions. [2021-12-06 20:53:13,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:53:13,178 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 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 471 [2021-12-06 20:53:13,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:53:13,182 INFO L225 Difference]: With dead ends: 12006 [2021-12-06 20:53:13,182 INFO L226 Difference]: Without dead ends: 6255 [2021-12-06 20:53:13,186 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 [2021-12-06 20:53:13,186 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 160 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:53:13,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 378 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:53:13,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6255 states. [2021-12-06 20:53:13,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6255 to 6255. [2021-12-06 20:53:13,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6255 states, 6254 states have (on average 1.4948832747041894) internal successors, (9349), 6254 states have internal predecessors, (9349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:13,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6255 states to 6255 states and 9349 transitions. [2021-12-06 20:53:13,263 INFO L78 Accepts]: Start accepts. Automaton has 6255 states and 9349 transitions. Word has length 471 [2021-12-06 20:53:13,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:53:13,263 INFO L470 AbstractCegarLoop]: Abstraction has 6255 states and 9349 transitions. [2021-12-06 20:53:13,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:13,263 INFO L276 IsEmpty]: Start isEmpty. Operand 6255 states and 9349 transitions. [2021-12-06 20:53:13,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 514 [2021-12-06 20:53:13,272 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:53:13,272 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 13, 13, 12, 12, 11, 11, 10, 10, 10, 10, 10, 9, 9, 8, 8, 7, 6, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:53:13,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-12-06 20:53:13,272 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:53:13,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:53:13,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1847595616, now seen corresponding path program 1 times [2021-12-06 20:53:13,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:53:13,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137302824] [2021-12-06 20:53:13,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:53:13,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:53:13,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:53:13,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2512 backedges. 744 proven. 7 refuted. 0 times theorem prover too weak. 1761 trivial. 0 not checked. [2021-12-06 20:53:13,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:53:13,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137302824] [2021-12-06 20:53:13,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137302824] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:53:13,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262275555] [2021-12-06 20:53:13,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:53:13,460 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:53:13,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe631736-26b3-4f8f-aaa4-7944ca0f22c5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:53:13,460 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe631736-26b3-4f8f-aaa4-7944ca0f22c5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:53:13,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe631736-26b3-4f8f-aaa4-7944ca0f22c5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 20:53:14,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:53:14,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 2354 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 20:53:14,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:53:14,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2512 backedges. 707 proven. 0 refuted. 0 times theorem prover too weak. 1805 trivial. 0 not checked. [2021-12-06 20:53:14,422 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:53:14,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262275555] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:53:14,422 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 20:53:14,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-06 20:53:14,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506078977] [2021-12-06 20:53:14,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:53:14,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:53:14,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:53:14,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:53:14,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 20:53:14,424 INFO L87 Difference]: Start difference. First operand 6255 states and 9349 transitions. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:14,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:53:14,528 INFO L93 Difference]: Finished difference Result 12968 states and 19406 transitions. [2021-12-06 20:53:14,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:53:14,528 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 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 513 [2021-12-06 20:53:14,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:53:14,534 INFO L225 Difference]: With dead ends: 12968 [2021-12-06 20:53:14,534 INFO L226 Difference]: Without dead ends: 6736 [2021-12-06 20:53:14,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 515 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 20:53:14,539 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 161 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:53:14,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 377 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:53:14,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6736 states. [2021-12-06 20:53:14,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6736 to 6736. [2021-12-06 20:53:14,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6736 states, 6735 states have (on average 1.4962138084632517) internal successors, (10077), 6735 states have internal predecessors, (10077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:14,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6736 states to 6736 states and 10077 transitions. [2021-12-06 20:53:14,627 INFO L78 Accepts]: Start accepts. Automaton has 6736 states and 10077 transitions. Word has length 513 [2021-12-06 20:53:14,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:53:14,627 INFO L470 AbstractCegarLoop]: Abstraction has 6736 states and 10077 transitions. [2021-12-06 20:53:14,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:14,627 INFO L276 IsEmpty]: Start isEmpty. Operand 6736 states and 10077 transitions. [2021-12-06 20:53:14,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 522 [2021-12-06 20:53:14,637 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:53:14,637 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 13, 13, 12, 12, 11, 11, 10, 10, 10, 10, 10, 9, 9, 8, 8, 7, 7, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:53:14,661 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe631736-26b3-4f8f-aaa4-7944ca0f22c5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 20:53:14,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe631736-26b3-4f8f-aaa4-7944ca0f22c5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-12-06 20:53:14,839 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:53:14,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:53:14,840 INFO L85 PathProgramCache]: Analyzing trace with hash -138901474, now seen corresponding path program 1 times [2021-12-06 20:53:14,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:53:14,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865340512] [2021-12-06 20:53:14,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:53:14,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:53:14,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:53:15,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2528 backedges. 1473 proven. 0 refuted. 0 times theorem prover too weak. 1055 trivial. 0 not checked. [2021-12-06 20:53:15,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:53:15,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865340512] [2021-12-06 20:53:15,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865340512] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:53:15,063 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:53:15,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:53:15,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089088466] [2021-12-06 20:53:15,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:53:15,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:53:15,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:53:15,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:53:15,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:53:15,064 INFO L87 Difference]: Start difference. First operand 6736 states and 10077 transitions. Second operand has 4 states, 4 states have (on average 49.5) internal successors, (198), 4 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:16,742 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:53:17,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:53:17,047 INFO L93 Difference]: Finished difference Result 14638 states and 21839 transitions. [2021-12-06 20:53:17,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:53:17,048 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 49.5) internal successors, (198), 4 states have internal predecessors, (198), 0 states have call successors, (0), 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 521 [2021-12-06 20:53:17,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:53:17,054 INFO L225 Difference]: With dead ends: 14638 [2021-12-06 20:53:17,054 INFO L226 Difference]: Without dead ends: 7925 [2021-12-06 20:53:17,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:53:17,061 INFO L933 BasicCegarLoop]: 298 mSDtfsCounter, 75 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-06 20:53:17,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 725 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-06 20:53:17,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7925 states. [2021-12-06 20:53:17,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7925 to 7310. [2021-12-06 20:53:17,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7310 states, 7309 states have (on average 1.49746887399097) internal successors, (10945), 7309 states have internal predecessors, (10945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:17,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7310 states to 7310 states and 10945 transitions. [2021-12-06 20:53:17,159 INFO L78 Accepts]: Start accepts. Automaton has 7310 states and 10945 transitions. Word has length 521 [2021-12-06 20:53:17,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:53:17,159 INFO L470 AbstractCegarLoop]: Abstraction has 7310 states and 10945 transitions. [2021-12-06 20:53:17,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.5) internal successors, (198), 4 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:17,159 INFO L276 IsEmpty]: Start isEmpty. Operand 7310 states and 10945 transitions. [2021-12-06 20:53:17,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 522 [2021-12-06 20:53:17,166 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:53:17,166 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 13, 13, 12, 12, 11, 11, 10, 10, 10, 10, 10, 9, 9, 8, 8, 7, 7, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:53:17,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-12-06 20:53:17,166 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:53:17,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:53:17,167 INFO L85 PathProgramCache]: Analyzing trace with hash -930711262, now seen corresponding path program 1 times [2021-12-06 20:53:17,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:53:17,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759803528] [2021-12-06 20:53:17,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:53:17,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:53:17,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:53:17,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2528 backedges. 393 proven. 0 refuted. 0 times theorem prover too weak. 2135 trivial. 0 not checked. [2021-12-06 20:53:17,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:53:17,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759803528] [2021-12-06 20:53:17,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759803528] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:53:17,384 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:53:17,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:53:17,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819747641] [2021-12-06 20:53:17,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:53:17,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:53:17,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:53:17,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:53:17,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:53:17,386 INFO L87 Difference]: Start difference. First operand 7310 states and 10945 transitions. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:17,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:53:17,538 INFO L93 Difference]: Finished difference Result 15113 states and 22651 transitions. [2021-12-06 20:53:17,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:53:17,539 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 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 521 [2021-12-06 20:53:17,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:53:17,546 INFO L225 Difference]: With dead ends: 15113 [2021-12-06 20:53:17,546 INFO L226 Difference]: Without dead ends: 7826 [2021-12-06 20:53:17,550 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 [2021-12-06 20:53:17,550 INFO L933 BasicCegarLoop]: 404 mSDtfsCounter, 150 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:53:17,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 593 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:53:17,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7826 states. [2021-12-06 20:53:17,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7826 to 7826. [2021-12-06 20:53:17,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7826 states, 7825 states have (on average 1.4968690095846646) internal successors, (11713), 7825 states have internal predecessors, (11713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:17,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7826 states to 7826 states and 11713 transitions. [2021-12-06 20:53:17,684 INFO L78 Accepts]: Start accepts. Automaton has 7826 states and 11713 transitions. Word has length 521 [2021-12-06 20:53:17,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:53:17,684 INFO L470 AbstractCegarLoop]: Abstraction has 7826 states and 11713 transitions. [2021-12-06 20:53:17,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:17,684 INFO L276 IsEmpty]: Start isEmpty. Operand 7826 states and 11713 transitions. [2021-12-06 20:53:17,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 599 [2021-12-06 20:53:17,695 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:53:17,695 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 15, 15, 14, 14, 13, 13, 12, 12, 12, 12, 12, 11, 11, 10, 10, 9, 8, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:53:17,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-12-06 20:53:17,695 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:53:17,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:53:17,696 INFO L85 PathProgramCache]: Analyzing trace with hash -296644096, now seen corresponding path program 1 times [2021-12-06 20:53:17,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:53:17,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088399008] [2021-12-06 20:53:17,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:53:17,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:53:17,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:53:17,951 INFO L134 CoverageAnalysis]: Checked inductivity of 3410 backedges. 849 proven. 0 refuted. 0 times theorem prover too weak. 2561 trivial. 0 not checked. [2021-12-06 20:53:17,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:53:17,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088399008] [2021-12-06 20:53:17,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088399008] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:53:17,951 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:53:17,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:53:17,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422486877] [2021-12-06 20:53:17,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:53:17,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:53:17,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:53:17,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:53:17,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:53:17,953 INFO L87 Difference]: Start difference. First operand 7826 states and 11713 transitions. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:18,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:53:18,102 INFO L93 Difference]: Finished difference Result 16151 states and 24196 transitions. [2021-12-06 20:53:18,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:53:18,102 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 598 [2021-12-06 20:53:18,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:53:18,110 INFO L225 Difference]: With dead ends: 16151 [2021-12-06 20:53:18,110 INFO L226 Difference]: Without dead ends: 8348 [2021-12-06 20:53:18,114 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 [2021-12-06 20:53:18,115 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 160 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:53:18,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 375 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:53:18,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8348 states. [2021-12-06 20:53:18,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8348 to 8348. [2021-12-06 20:53:18,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8348 states, 8347 states have (on average 1.498143045405535) internal successors, (12505), 8347 states have internal predecessors, (12505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:18,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8348 states to 8348 states and 12505 transitions. [2021-12-06 20:53:18,242 INFO L78 Accepts]: Start accepts. Automaton has 8348 states and 12505 transitions. Word has length 598 [2021-12-06 20:53:18,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:53:18,243 INFO L470 AbstractCegarLoop]: Abstraction has 8348 states and 12505 transitions. [2021-12-06 20:53:18,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:18,243 INFO L276 IsEmpty]: Start isEmpty. Operand 8348 states and 12505 transitions. [2021-12-06 20:53:18,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 642 [2021-12-06 20:53:18,251 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:53:18,251 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 16, 16, 15, 15, 14, 14, 13, 13, 13, 13, 13, 12, 12, 11, 11, 10, 9, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:53:18,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-12-06 20:53:18,251 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:53:18,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:53:18,252 INFO L85 PathProgramCache]: Analyzing trace with hash -764735426, now seen corresponding path program 1 times [2021-12-06 20:53:18,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:53:18,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383824159] [2021-12-06 20:53:18,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:53:18,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:53:18,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:53:18,503 INFO L134 CoverageAnalysis]: Checked inductivity of 3915 backedges. 914 proven. 0 refuted. 0 times theorem prover too weak. 3001 trivial. 0 not checked. [2021-12-06 20:53:18,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:53:18,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383824159] [2021-12-06 20:53:18,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383824159] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:53:18,504 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:53:18,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:53:18,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331826428] [2021-12-06 20:53:18,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:53:18,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:53:18,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:53:18,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:53:18,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:53:18,505 INFO L87 Difference]: Start difference. First operand 8348 states and 12505 transitions. Second operand has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:18,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:53:18,627 INFO L93 Difference]: Finished difference Result 17195 states and 25780 transitions. [2021-12-06 20:53:18,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:53:18,627 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 641 [2021-12-06 20:53:18,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:53:18,635 INFO L225 Difference]: With dead ends: 17195 [2021-12-06 20:53:18,635 INFO L226 Difference]: Without dead ends: 8870 [2021-12-06 20:53:18,639 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 [2021-12-06 20:53:18,639 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 161 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:53:18,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 374 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:53:18,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8870 states. [2021-12-06 20:53:18,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8870 to 8870. [2021-12-06 20:53:18,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8870 states, 8869 states have (on average 1.4993798624422146) internal successors, (13298), 8869 states have internal predecessors, (13298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:18,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8870 states to 8870 states and 13298 transitions. [2021-12-06 20:53:18,756 INFO L78 Accepts]: Start accepts. Automaton has 8870 states and 13298 transitions. Word has length 641 [2021-12-06 20:53:18,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:53:18,757 INFO L470 AbstractCegarLoop]: Abstraction has 8870 states and 13298 transitions. [2021-12-06 20:53:18,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:18,757 INFO L276 IsEmpty]: Start isEmpty. Operand 8870 states and 13298 transitions. [2021-12-06 20:53:18,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 651 [2021-12-06 20:53:18,765 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:53:18,765 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 16, 16, 15, 15, 14, 14, 13, 13, 13, 13, 13, 12, 12, 11, 11, 10, 10, 6, 6, 4, 4, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:53:18,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-12-06 20:53:18,765 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:53:18,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:53:18,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1181033531, now seen corresponding path program 1 times [2021-12-06 20:53:18,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:53:18,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392433037] [2021-12-06 20:53:18,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:53:18,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:53:18,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:53:18,991 INFO L134 CoverageAnalysis]: Checked inductivity of 3946 backedges. 502 proven. 0 refuted. 0 times theorem prover too weak. 3444 trivial. 0 not checked. [2021-12-06 20:53:18,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:53:18,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392433037] [2021-12-06 20:53:18,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392433037] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:53:18,992 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:53:18,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:53:18,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069525567] [2021-12-06 20:53:18,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:53:18,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:53:18,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:53:18,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:53:18,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:53:18,993 INFO L87 Difference]: Start difference. First operand 8870 states and 13298 transitions. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:19,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:53:19,123 INFO L93 Difference]: Finished difference Result 18234 states and 27359 transitions. [2021-12-06 20:53:19,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:53:19,124 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 650 [2021-12-06 20:53:19,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:53:19,131 INFO L225 Difference]: With dead ends: 18234 [2021-12-06 20:53:19,131 INFO L226 Difference]: Without dead ends: 9387 [2021-12-06 20:53:19,136 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 [2021-12-06 20:53:19,136 INFO L933 BasicCegarLoop]: 404 mSDtfsCounter, 150 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:53:19,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 593 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:53:19,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9387 states. [2021-12-06 20:53:19,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9387 to 9387. [2021-12-06 20:53:19,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9387 states, 9386 states have (on average 1.4987215001065417) internal successors, (14067), 9386 states have internal predecessors, (14067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:19,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9387 states to 9387 states and 14067 transitions. [2021-12-06 20:53:19,260 INFO L78 Accepts]: Start accepts. Automaton has 9387 states and 14067 transitions. Word has length 650 [2021-12-06 20:53:19,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:53:19,261 INFO L470 AbstractCegarLoop]: Abstraction has 9387 states and 14067 transitions. [2021-12-06 20:53:19,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:19,261 INFO L276 IsEmpty]: Start isEmpty. Operand 9387 states and 14067 transitions. [2021-12-06 20:53:19,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 729 [2021-12-06 20:53:19,270 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:53:19,271 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 18, 18, 17, 17, 16, 16, 15, 15, 15, 15, 15, 14, 14, 13, 13, 12, 11, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:53:19,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-12-06 20:53:19,271 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:53:19,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:53:19,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1426739437, now seen corresponding path program 1 times [2021-12-06 20:53:19,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:53:19,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497196392] [2021-12-06 20:53:19,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:53:19,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:53:19,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:53:19,541 INFO L134 CoverageAnalysis]: Checked inductivity of 5037 backedges. 1058 proven. 0 refuted. 0 times theorem prover too weak. 3979 trivial. 0 not checked. [2021-12-06 20:53:19,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:53:19,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497196392] [2021-12-06 20:53:19,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497196392] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:53:19,541 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:53:19,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:53:19,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533259484] [2021-12-06 20:53:19,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:53:19,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:53:19,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:53:19,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:53:19,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:53:19,542 INFO L87 Difference]: Start difference. First operand 9387 states and 14067 transitions. Second operand has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:19,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:53:19,673 INFO L93 Difference]: Finished difference Result 19273 states and 28904 transitions. [2021-12-06 20:53:19,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:53:19,674 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 728 [2021-12-06 20:53:19,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:53:19,681 INFO L225 Difference]: With dead ends: 19273 [2021-12-06 20:53:19,681 INFO L226 Difference]: Without dead ends: 9909 [2021-12-06 20:53:19,686 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 [2021-12-06 20:53:19,686 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 160 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:53:19,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 372 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:53:19,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9909 states. [2021-12-06 20:53:19,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9909 to 9909. [2021-12-06 20:53:19,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9909 states, 9908 states have (on average 1.5) internal successors, (14862), 9908 states have internal predecessors, (14862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:19,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9909 states to 9909 states and 14862 transitions. [2021-12-06 20:53:19,815 INFO L78 Accepts]: Start accepts. Automaton has 9909 states and 14862 transitions. Word has length 728 [2021-12-06 20:53:19,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:53:19,816 INFO L470 AbstractCegarLoop]: Abstraction has 9909 states and 14862 transitions. [2021-12-06 20:53:19,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:19,816 INFO L276 IsEmpty]: Start isEmpty. Operand 9909 states and 14862 transitions. [2021-12-06 20:53:19,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 773 [2021-12-06 20:53:19,826 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:53:19,827 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 20, 20, 20, 20, 20, 20, 19, 19, 18, 18, 17, 17, 16, 16, 16, 16, 16, 15, 15, 14, 14, 13, 12, 7, 7, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:53:19,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-12-06 20:53:19,827 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:53:19,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:53:19,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1609533332, now seen corresponding path program 1 times [2021-12-06 20:53:19,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:53:19,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762527103] [2021-12-06 20:53:19,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:53:19,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:53:19,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:53:20,105 INFO L134 CoverageAnalysis]: Checked inductivity of 5655 backedges. 1122 proven. 0 refuted. 0 times theorem prover too weak. 4533 trivial. 0 not checked. [2021-12-06 20:53:20,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:53:20,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762527103] [2021-12-06 20:53:20,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762527103] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:53:20,105 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:53:20,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:53:20,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121552782] [2021-12-06 20:53:20,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:53:20,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:53:20,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:53:20,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:53:20,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:53:20,107 INFO L87 Difference]: Start difference. First operand 9909 states and 14862 transitions. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:20,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:53:20,228 INFO L93 Difference]: Finished difference Result 10433 states and 15660 transitions. [2021-12-06 20:53:20,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:53:20,229 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 772 [2021-12-06 20:53:20,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:53:20,237 INFO L225 Difference]: With dead ends: 10433 [2021-12-06 20:53:20,237 INFO L226 Difference]: Without dead ends: 10431 [2021-12-06 20:53:20,239 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 [2021-12-06 20:53:20,239 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 161 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:53:20,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 371 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:53:20,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10431 states. [2021-12-06 20:53:20,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10431 to 10431. [2021-12-06 20:53:20,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10431 states, 10430 states have (on average 1.5012464046021092) internal successors, (15658), 10430 states have internal predecessors, (15658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:20,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10431 states to 10431 states and 15658 transitions. [2021-12-06 20:53:20,392 INFO L78 Accepts]: Start accepts. Automaton has 10431 states and 15658 transitions. Word has length 772 [2021-12-06 20:53:20,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:53:20,392 INFO L470 AbstractCegarLoop]: Abstraction has 10431 states and 15658 transitions. [2021-12-06 20:53:20,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:20,392 INFO L276 IsEmpty]: Start isEmpty. Operand 10431 states and 15658 transitions. [2021-12-06 20:53:20,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 783 [2021-12-06 20:53:20,402 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:53:20,403 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 20, 20, 20, 20, 20, 20, 19, 19, 18, 18, 17, 17, 16, 16, 16, 16, 16, 15, 15, 14, 14, 13, 13, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:53:20,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-12-06 20:53:20,403 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:53:20,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:53:20,403 INFO L85 PathProgramCache]: Analyzing trace with hash -903556745, now seen corresponding path program 1 times [2021-12-06 20:53:20,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:53:20,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947166999] [2021-12-06 20:53:20,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:53:20,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:53:20,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:53:20,802 INFO L134 CoverageAnalysis]: Checked inductivity of 5702 backedges. 3371 proven. 81 refuted. 0 times theorem prover too weak. 2250 trivial. 0 not checked. [2021-12-06 20:53:20,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:53:20,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947166999] [2021-12-06 20:53:20,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947166999] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:53:20,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347589892] [2021-12-06 20:53:20,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:53:20,802 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:53:20,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe631736-26b3-4f8f-aaa4-7944ca0f22c5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:53:20,803 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe631736-26b3-4f8f-aaa4-7944ca0f22c5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:53:20,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe631736-26b3-4f8f-aaa4-7944ca0f22c5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 20:53:21,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:53:21,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 3303 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-06 20:53:21,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:53:21,705 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-06 20:53:21,705 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 1 case distinctions, treesize of input 18 treesize of output 19 [2021-12-06 20:53:21,767 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-12-06 20:53:21,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 10 [2021-12-06 20:53:21,915 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 [2021-12-06 20:53:21,956 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-06 20:53:21,956 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 1 case distinctions, treesize of input 18 treesize of output 19 [2021-12-06 20:53:22,019 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 24 treesize of output 20 [2021-12-06 20:53:22,024 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-06 20:53:22,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 36 treesize of output 28 [2021-12-06 20:53:22,197 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 [2021-12-06 20:53:22,224 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 19 [2021-12-06 20:53:22,229 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 19 treesize of output 13 [2021-12-06 20:53:22,264 INFO L354 Elim1Store]: treesize reduction 60, result has 39.4 percent of original size [2021-12-06 20:53:22,265 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 33 treesize of output 55 [2021-12-06 20:53:22,326 INFO L354 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2021-12-06 20:53:22,326 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 34 treesize of output 36 [2021-12-06 20:53:22,547 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-06 20:53:22,548 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 29 treesize of output 11 [2021-12-06 20:53:22,649 INFO L134 CoverageAnalysis]: Checked inductivity of 5702 backedges. 2342 proven. 586 refuted. 0 times theorem prover too weak. 2774 trivial. 0 not checked. [2021-12-06 20:53:22,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:53:22,919 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 77 treesize of output 53 [2021-12-06 20:53:22,922 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 53 treesize of output 41 [2021-12-06 20:53:25,005 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 105 treesize of output 101 [2021-12-06 20:53:25,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 20:53:25,303 INFO L134 CoverageAnalysis]: Checked inductivity of 5702 backedges. 2152 proven. 0 refuted. 0 times theorem prover too weak. 3550 trivial. 0 not checked. [2021-12-06 20:53:25,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347589892] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 20:53:25,304 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:53:25,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 13] total 20 [2021-12-06 20:53:25,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306052030] [2021-12-06 20:53:25,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:53:25,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 20:53:25,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:53:25,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 20:53:25,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-12-06 20:53:25,306 INFO L87 Difference]: Start difference. First operand 10431 states and 15658 transitions. Second operand has 7 states, 7 states have (on average 33.285714285714285) internal successors, (233), 7 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:27,155 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:53:29,186 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:53:34,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:53:34,183 INFO L93 Difference]: Finished difference Result 30466 states and 45757 transitions. [2021-12-06 20:53:34,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 20:53:34,183 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 33.285714285714285) internal successors, (233), 7 states have internal predecessors, (233), 0 states have call successors, (0), 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 782 [2021-12-06 20:53:34,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:53:34,202 INFO L225 Difference]: With dead ends: 30466 [2021-12-06 20:53:34,202 INFO L226 Difference]: Without dead ends: 20058 [2021-12-06 20:53:34,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1577 GetRequests, 1554 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-12-06 20:53:34,211 INFO L933 BasicCegarLoop]: 267 mSDtfsCounter, 471 mSDsluCounter, 768 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 116 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 1035 SdHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 262 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-12-06 20:53:34,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [471 Valid, 1035 Invalid, 906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 527 Invalid, 1 Unknown, 262 Unchecked, 4.5s Time] [2021-12-06 20:53:34,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20058 states. [2021-12-06 20:53:34,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20058 to 17355. [2021-12-06 20:53:34,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17355 states, 17354 states have (on average 1.5145211478621643) internal successors, (26283), 17354 states have internal predecessors, (26283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:34,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17355 states to 17355 states and 26283 transitions. [2021-12-06 20:53:34,515 INFO L78 Accepts]: Start accepts. Automaton has 17355 states and 26283 transitions. Word has length 782 [2021-12-06 20:53:34,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:53:34,515 INFO L470 AbstractCegarLoop]: Abstraction has 17355 states and 26283 transitions. [2021-12-06 20:53:34,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 33.285714285714285) internal successors, (233), 7 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:34,516 INFO L276 IsEmpty]: Start isEmpty. Operand 17355 states and 26283 transitions. [2021-12-06 20:53:34,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 786 [2021-12-06 20:53:34,530 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:53:34,531 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 20, 20, 20, 20, 20, 20, 19, 19, 18, 18, 17, 17, 16, 16, 16, 16, 16, 15, 15, 14, 14, 13, 13, 8, 8, 7, 5, 5, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:53:34,557 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe631736-26b3-4f8f-aaa4-7944ca0f22c5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 20:53:34,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe631736-26b3-4f8f-aaa4-7944ca0f22c5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-12-06 20:53:34,732 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:53:34,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:53:34,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1153034768, now seen corresponding path program 1 times [2021-12-06 20:53:34,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:53:34,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224369256] [2021-12-06 20:53:34,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:53:34,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:53:34,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:53:35,040 INFO L134 CoverageAnalysis]: Checked inductivity of 5717 backedges. 3231 proven. 0 refuted. 0 times theorem prover too weak. 2486 trivial. 0 not checked. [2021-12-06 20:53:35,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:53:35,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224369256] [2021-12-06 20:53:35,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224369256] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:53:35,041 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:53:35,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:53:35,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726452220] [2021-12-06 20:53:35,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:53:35,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:53:35,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:53:35,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:53:35,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:53:35,042 INFO L87 Difference]: Start difference. First operand 17355 states and 26283 transitions. Second operand has 4 states, 4 states have (on average 56.5) internal successors, (226), 4 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) [2021-12-06 20:53:36,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:53:36,309 INFO L93 Difference]: Finished difference Result 36123 states and 54530 transitions. [2021-12-06 20:53:36,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:53:36,310 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.5) internal successors, (226), 4 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) Word has length 785 [2021-12-06 20:53:36,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:53:36,326 INFO L225 Difference]: With dead ends: 36123 [2021-12-06 20:53:36,326 INFO L226 Difference]: Without dead ends: 18791 [2021-12-06 20:53:36,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:53:36,336 INFO L933 BasicCegarLoop]: 297 mSDtfsCounter, 73 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 723 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:53:36,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 723 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-06 20:53:36,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18791 states. [2021-12-06 20:53:36,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18791 to 17375. [2021-12-06 20:53:36,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17375 states, 17374 states have (on average 1.513928859214919) internal successors, (26303), 17374 states have internal predecessors, (26303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:36,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17375 states to 17375 states and 26303 transitions. [2021-12-06 20:53:36,625 INFO L78 Accepts]: Start accepts. Automaton has 17375 states and 26303 transitions. Word has length 785 [2021-12-06 20:53:36,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:53:36,625 INFO L470 AbstractCegarLoop]: Abstraction has 17375 states and 26303 transitions. [2021-12-06 20:53:36,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.5) internal successors, (226), 4 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) [2021-12-06 20:53:36,625 INFO L276 IsEmpty]: Start isEmpty. Operand 17375 states and 26303 transitions. [2021-12-06 20:53:36,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 849 [2021-12-06 20:53:36,640 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:53:36,641 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 23, 23, 23, 23, 23, 23, 19, 19, 18, 18, 17, 17, 16, 16, 16, 16, 16, 15, 15, 14, 14, 13, 13, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:53:36,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-12-06 20:53:36,641 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:53:36,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:53:36,641 INFO L85 PathProgramCache]: Analyzing trace with hash 855496686, now seen corresponding path program 1 times [2021-12-06 20:53:36,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:53:36,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647078429] [2021-12-06 20:53:36,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:53:36,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:53:36,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:53:36,927 INFO L134 CoverageAnalysis]: Checked inductivity of 6836 backedges. 3737 proven. 0 refuted. 0 times theorem prover too weak. 3099 trivial. 0 not checked. [2021-12-06 20:53:36,927 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:53:36,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647078429] [2021-12-06 20:53:36,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647078429] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:53:36,928 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:53:36,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:53:36,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941075918] [2021-12-06 20:53:36,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:53:36,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:53:36,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:53:36,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:53:36,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:53:36,929 INFO L87 Difference]: Start difference. First operand 17375 states and 26303 transitions. Second operand has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:38,761 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:53:39,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:53:39,214 INFO L93 Difference]: Finished difference Result 36143 states and 54530 transitions. [2021-12-06 20:53:39,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:53:39,215 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 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 848 [2021-12-06 20:53:39,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:53:39,231 INFO L225 Difference]: With dead ends: 36143 [2021-12-06 20:53:39,231 INFO L226 Difference]: Without dead ends: 18791 [2021-12-06 20:53:39,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:53:39,240 INFO L933 BasicCegarLoop]: 296 mSDtfsCounter, 92 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:53:39,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 721 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-06 20:53:39,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18791 states. [2021-12-06 20:53:39,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18791 to 17375. [2021-12-06 20:53:39,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17375 states, 17374 states have (on average 1.5117992402440428) internal successors, (26266), 17374 states have internal predecessors, (26266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:39,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17375 states to 17375 states and 26266 transitions. [2021-12-06 20:53:39,537 INFO L78 Accepts]: Start accepts. Automaton has 17375 states and 26266 transitions. Word has length 848 [2021-12-06 20:53:39,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:53:39,537 INFO L470 AbstractCegarLoop]: Abstraction has 17375 states and 26266 transitions. [2021-12-06 20:53:39,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:39,537 INFO L276 IsEmpty]: Start isEmpty. Operand 17375 states and 26266 transitions. [2021-12-06 20:53:39,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 849 [2021-12-06 20:53:39,552 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:53:39,552 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 23, 23, 23, 23, 23, 23, 22, 22, 18, 18, 17, 17, 16, 16, 16, 16, 16, 15, 15, 14, 14, 13, 13, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:53:39,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-12-06 20:53:39,552 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:53:39,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:53:39,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1255240550, now seen corresponding path program 1 times [2021-12-06 20:53:39,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:53:39,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932250639] [2021-12-06 20:53:39,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:53:39,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:53:39,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:53:39,852 INFO L134 CoverageAnalysis]: Checked inductivity of 6944 backedges. 3949 proven. 46 refuted. 0 times theorem prover too weak. 2949 trivial. 0 not checked. [2021-12-06 20:53:39,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:53:39,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932250639] [2021-12-06 20:53:39,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932250639] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:53:39,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324918084] [2021-12-06 20:53:39,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:53:39,852 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:53:39,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe631736-26b3-4f8f-aaa4-7944ca0f22c5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:53:39,853 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe631736-26b3-4f8f-aaa4-7944ca0f22c5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:53:39,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe631736-26b3-4f8f-aaa4-7944ca0f22c5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 20:53:40,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:53:40,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 3570 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-06 20:53:40,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:53:40,787 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-06 20:53:40,787 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 1 case distinctions, treesize of input 18 treesize of output 19 [2021-12-06 20:53:40,814 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-06 20:53:40,815 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 19 treesize of output 7 [2021-12-06 20:53:40,987 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 [2021-12-06 20:53:41,065 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-06 20:53:41,065 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 1 case distinctions, treesize of input 18 treesize of output 19 [2021-12-06 20:53:41,118 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 19 treesize of output 7 [2021-12-06 20:53:41,387 INFO L134 CoverageAnalysis]: Checked inductivity of 6944 backedges. 3944 proven. 238 refuted. 0 times theorem prover too weak. 2762 trivial. 0 not checked. [2021-12-06 20:53:41,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:53:41,757 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 [2021-12-06 20:53:41,969 INFO L134 CoverageAnalysis]: Checked inductivity of 6944 backedges. 3917 proven. 0 refuted. 0 times theorem prover too weak. 3027 trivial. 0 not checked. [2021-12-06 20:53:41,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324918084] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 20:53:41,969 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:53:41,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 8] total 10 [2021-12-06 20:53:41,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104613089] [2021-12-06 20:53:41,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:53:41,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:53:41,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:53:41,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:53:41,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-06 20:53:41,971 INFO L87 Difference]: Start difference. First operand 17375 states and 26266 transitions. Second operand has 4 states, 4 states have (on average 57.5) internal successors, (230), 4 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:43,556 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:53:44,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:53:44,086 INFO L93 Difference]: Finished difference Result 37176 states and 55941 transitions. [2021-12-06 20:53:44,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:53:44,086 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 57.5) internal successors, (230), 4 states have internal predecessors, (230), 0 states have call successors, (0), 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 848 [2021-12-06 20:53:44,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:53:44,101 INFO L225 Difference]: With dead ends: 37176 [2021-12-06 20:53:44,101 INFO L226 Difference]: Without dead ends: 19824 [2021-12-06 20:53:44,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1703 GetRequests, 1694 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-12-06 20:53:44,106 INFO L933 BasicCegarLoop]: 230 mSDtfsCounter, 125 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-06 20:53:44,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 583 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-06 20:53:44,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19824 states. [2021-12-06 20:53:44,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19824 to 17395. [2021-12-06 20:53:44,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17395 states, 17394 states have (on average 1.5112107623318385) internal successors, (26286), 17394 states have internal predecessors, (26286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:44,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17395 states to 17395 states and 26286 transitions. [2021-12-06 20:53:44,378 INFO L78 Accepts]: Start accepts. Automaton has 17395 states and 26286 transitions. Word has length 848 [2021-12-06 20:53:44,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:53:44,378 INFO L470 AbstractCegarLoop]: Abstraction has 17395 states and 26286 transitions. [2021-12-06 20:53:44,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 57.5) internal successors, (230), 4 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:44,378 INFO L276 IsEmpty]: Start isEmpty. Operand 17395 states and 26286 transitions. [2021-12-06 20:53:44,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 852 [2021-12-06 20:53:44,393 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:53:44,394 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 23, 23, 23, 23, 23, 23, 22, 19, 18, 18, 17, 17, 16, 16, 16, 16, 16, 15, 15, 14, 14, 13, 13, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:53:44,420 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe631736-26b3-4f8f-aaa4-7944ca0f22c5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 20:53:44,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe631736-26b3-4f8f-aaa4-7944ca0f22c5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:53:44,596 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:53:44,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:53:44,597 INFO L85 PathProgramCache]: Analyzing trace with hash -653887438, now seen corresponding path program 1 times [2021-12-06 20:53:44,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:53:44,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131676001] [2021-12-06 20:53:44,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:53:44,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:53:44,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:53:44,882 INFO L134 CoverageAnalysis]: Checked inductivity of 6896 backedges. 3778 proven. 0 refuted. 0 times theorem prover too weak. 3118 trivial. 0 not checked. [2021-12-06 20:53:44,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:53:44,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131676001] [2021-12-06 20:53:44,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131676001] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:53:44,883 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:53:44,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:53:44,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27797882] [2021-12-06 20:53:44,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:53:44,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:53:44,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:53:44,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:53:44,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:53:44,884 INFO L87 Difference]: Start difference. First operand 17395 states and 26286 transitions. Second operand has 4 states, 4 states have (on average 53.25) internal successors, (213), 4 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:46,889 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:53:47,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:53:47,370 INFO L93 Difference]: Finished difference Result 36035 states and 54285 transitions. [2021-12-06 20:53:47,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:53:47,371 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 53.25) internal successors, (213), 4 states have internal predecessors, (213), 0 states have call successors, (0), 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 851 [2021-12-06 20:53:47,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:53:47,388 INFO L225 Difference]: With dead ends: 36035 [2021-12-06 20:53:47,388 INFO L226 Difference]: Without dead ends: 18663 [2021-12-06 20:53:47,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:53:47,398 INFO L933 BasicCegarLoop]: 292 mSDtfsCounter, 86 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:53:47,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 713 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 234 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-06 20:53:47,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18663 states. [2021-12-06 20:53:47,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18663 to 17395. [2021-12-06 20:53:47,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17395 states, 17394 states have (on average 1.5090835920432333) internal successors, (26249), 17394 states have internal predecessors, (26249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:47,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17395 states to 17395 states and 26249 transitions. [2021-12-06 20:53:47,709 INFO L78 Accepts]: Start accepts. Automaton has 17395 states and 26249 transitions. Word has length 851 [2021-12-06 20:53:47,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:53:47,709 INFO L470 AbstractCegarLoop]: Abstraction has 17395 states and 26249 transitions. [2021-12-06 20:53:47,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 53.25) internal successors, (213), 4 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:47,709 INFO L276 IsEmpty]: Start isEmpty. Operand 17395 states and 26249 transitions. [2021-12-06 20:53:47,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 852 [2021-12-06 20:53:47,724 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:53:47,725 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 23, 23, 23, 23, 23, 23, 22, 22, 18, 18, 17, 17, 16, 16, 16, 16, 16, 15, 15, 14, 14, 13, 13, 8, 8, 7, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:53:47,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-12-06 20:53:47,725 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:53:47,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:53:47,725 INFO L85 PathProgramCache]: Analyzing trace with hash -570468491, now seen corresponding path program 1 times [2021-12-06 20:53:47,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:53:47,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337812716] [2021-12-06 20:53:47,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:53:47,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:53:47,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:53:48,001 INFO L134 CoverageAnalysis]: Checked inductivity of 6959 backedges. 3806 proven. 0 refuted. 0 times theorem prover too weak. 3153 trivial. 0 not checked. [2021-12-06 20:53:48,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:53:48,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337812716] [2021-12-06 20:53:48,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337812716] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:53:48,001 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:53:48,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:53:48,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618463510] [2021-12-06 20:53:48,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:53:48,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:53:48,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:53:48,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:53:48,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:53:48,002 INFO L87 Difference]: Start difference. First operand 17395 states and 26249 transitions. Second operand has 4 states, 4 states have (on average 53.75) internal successors, (215), 4 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:50,008 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:53:50,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:53:50,423 INFO L93 Difference]: Finished difference Result 36247 states and 54621 transitions. [2021-12-06 20:53:50,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:53:50,424 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 53.75) internal successors, (215), 4 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 851 [2021-12-06 20:53:50,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:53:50,439 INFO L225 Difference]: With dead ends: 36247 [2021-12-06 20:53:50,439 INFO L226 Difference]: Without dead ends: 18875 [2021-12-06 20:53:50,448 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 [2021-12-06 20:53:50,448 INFO L933 BasicCegarLoop]: 260 mSDtfsCounter, 30 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:53:50,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 649 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 169 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-06 20:53:50,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18875 states. [2021-12-06 20:53:50,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18875 to 18357. [2021-12-06 20:53:50,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18357 states, 18356 states have (on average 1.5065918500762694) internal successors, (27655), 18356 states have internal predecessors, (27655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:50,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18357 states to 18357 states and 27655 transitions. [2021-12-06 20:53:50,779 INFO L78 Accepts]: Start accepts. Automaton has 18357 states and 27655 transitions. Word has length 851 [2021-12-06 20:53:50,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:53:50,780 INFO L470 AbstractCegarLoop]: Abstraction has 18357 states and 27655 transitions. [2021-12-06 20:53:50,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 53.75) internal successors, (215), 4 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:50,780 INFO L276 IsEmpty]: Start isEmpty. Operand 18357 states and 27655 transitions. [2021-12-06 20:53:50,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 861 [2021-12-06 20:53:50,795 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:53:50,795 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 23, 23, 23, 23, 23, 23, 22, 22, 21, 21, 20, 20, 16, 16, 16, 16, 16, 15, 15, 14, 14, 13, 13, 8, 8, 7, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:53:50,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-12-06 20:53:50,795 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:53:50,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:53:50,796 INFO L85 PathProgramCache]: Analyzing trace with hash 407021035, now seen corresponding path program 1 times [2021-12-06 20:53:50,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:53:50,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663629485] [2021-12-06 20:53:50,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:53:50,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:53:50,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:53:51,081 INFO L134 CoverageAnalysis]: Checked inductivity of 7175 backedges. 3954 proven. 0 refuted. 0 times theorem prover too weak. 3221 trivial. 0 not checked. [2021-12-06 20:53:51,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:53:51,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663629485] [2021-12-06 20:53:51,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663629485] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:53:51,081 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:53:51,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:53:51,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496070066] [2021-12-06 20:53:51,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:53:51,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:53:51,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:53:51,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:53:51,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:53:51,082 INFO L87 Difference]: Start difference. First operand 18357 states and 27655 transitions. Second operand has 4 states, 4 states have (on average 54.25) internal successors, (217), 4 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:53,089 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:53:53,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:53:53,539 INFO L93 Difference]: Finished difference Result 37171 states and 55962 transitions. [2021-12-06 20:53:53,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:53:53,540 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 54.25) internal successors, (217), 4 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 860 [2021-12-06 20:53:53,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:53:53,555 INFO L225 Difference]: With dead ends: 37171 [2021-12-06 20:53:53,555 INFO L226 Difference]: Without dead ends: 18837 [2021-12-06 20:53:53,565 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 [2021-12-06 20:53:53,565 INFO L933 BasicCegarLoop]: 267 mSDtfsCounter, 44 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:53:53,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 664 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 196 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-06 20:53:53,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18837 states. [2021-12-06 20:53:53,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18837 to 18357. [2021-12-06 20:53:53,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18357 states, 18356 states have (on average 1.5055022880801918) internal successors, (27635), 18356 states have internal predecessors, (27635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:53,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18357 states to 18357 states and 27635 transitions. [2021-12-06 20:53:53,862 INFO L78 Accepts]: Start accepts. Automaton has 18357 states and 27635 transitions. Word has length 860 [2021-12-06 20:53:53,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:53:53,862 INFO L470 AbstractCegarLoop]: Abstraction has 18357 states and 27635 transitions. [2021-12-06 20:53:53,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.25) internal successors, (217), 4 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:53:53,863 INFO L276 IsEmpty]: Start isEmpty. Operand 18357 states and 27635 transitions. [2021-12-06 20:53:53,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 870 [2021-12-06 20:53:53,879 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:53:53,879 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 23, 23, 23, 23, 23, 23, 22, 22, 21, 21, 20, 20, 19, 19, 19, 19, 16, 15, 15, 14, 14, 13, 13, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:53:53,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-12-06 20:53:53,880 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:53:53,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:53:53,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1326089202, now seen corresponding path program 1 times [2021-12-06 20:53:53,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:53:53,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361016534] [2021-12-06 20:53:53,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:53:53,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:53:54,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:53:59,164 INFO L134 CoverageAnalysis]: Checked inductivity of 7358 backedges. 1936 proven. 5010 refuted. 0 times theorem prover too weak. 412 trivial. 0 not checked. [2021-12-06 20:53:59,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:53:59,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361016534] [2021-12-06 20:53:59,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361016534] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:53:59,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156674275] [2021-12-06 20:53:59,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:53:59,165 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:53:59,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe631736-26b3-4f8f-aaa4-7944ca0f22c5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:53:59,166 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe631736-26b3-4f8f-aaa4-7944ca0f22c5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:53:59,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe631736-26b3-4f8f-aaa4-7944ca0f22c5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 20:54:00,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:54:00,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 3582 conjuncts, 93 conjunts are in the unsatisfiable core [2021-12-06 20:54:00,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:54:00,229 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-06 20:54:00,229 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 1 case distinctions, treesize of input 18 treesize of output 19 [2021-12-06 20:54:00,334 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-12-06 20:54:00,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 10 [2021-12-06 20:54:00,508 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 [2021-12-06 20:54:00,761 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 6 treesize of output 5 [2021-12-06 20:54:00,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:54:00,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 44 [2021-12-06 20:54:00,836 INFO L354 Elim1Store]: treesize reduction 72, result has 40.0 percent of original size [2021-12-06 20:54:00,836 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 2 case distinctions, treesize of input 41 treesize of output 60 [2021-12-06 20:54:00,842 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-06 20:54:00,843 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 73 treesize of output 66 [2021-12-06 20:54:01,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:54:01,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 57 [2021-12-06 20:54:01,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:54:01,291 INFO L354 Elim1Store]: treesize reduction 127, result has 14.2 percent of original size [2021-12-06 20:54:01,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 49 [2021-12-06 20:54:01,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:54:01,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 51 [2021-12-06 20:54:01,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:54:01,369 INFO L354 Elim1Store]: treesize reduction 77, result has 35.8 percent of original size [2021-12-06 20:54:01,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 68 [2021-12-06 20:54:01,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:54:01,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 67 [2021-12-06 20:54:01,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:54:01,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 67 [2021-12-06 20:54:01,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:54:01,992 INFO L354 Elim1Store]: treesize reduction 60, result has 45.9 percent of original size [2021-12-06 20:54:01,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 160 treesize of output 155 [2021-12-06 20:54:01,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:54:02,025 INFO L354 Elim1Store]: treesize reduction 40, result has 49.4 percent of original size [2021-12-06 20:54:02,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 137 treesize of output 132 [2021-12-06 20:54:02,064 INFO L354 Elim1Store]: treesize reduction 53, result has 48.5 percent of original size [2021-12-06 20:54:02,065 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 75 [2021-12-06 20:54:03,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:54:03,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:54:03,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:54:03,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:54:03,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:54:03,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:54:03,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 326 treesize of output 266 [2021-12-06 20:54:03,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:54:03,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:54:03,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:54:03,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:54:03,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:54:03,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:54:03,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 326 treesize of output 266 [2021-12-06 20:54:03,232 INFO L354 Elim1Store]: treesize reduction 231, result has 26.4 percent of original size [2021-12-06 20:54:03,232 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 4 case distinctions, treesize of input 326 treesize of output 363 [2021-12-06 20:54:09,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:54:09,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:54:09,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:54:09,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 321 treesize of output 257 [2021-12-06 20:54:09,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:54:09,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:54:09,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:54:09,562 INFO L354 Elim1Store]: treesize reduction 105, result has 29.1 percent of original size [2021-12-06 20:54:09,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 330 treesize of output 345 [2021-12-06 20:54:09,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:54:09,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:54:09,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:54:09,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 346 treesize of output 276 [2021-12-06 20:54:09,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:54:09,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 184 treesize of output 124 [2021-12-06 20:54:09,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:54:09,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 76 [2021-12-06 20:54:09,905 INFO L354 Elim1Store]: treesize reduction 151, result has 29.4 percent of original size [2021-12-06 20:54:09,905 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 9 case distinctions, treesize of input 104 treesize of output 138 [2021-12-06 20:54:09,984 INFO L354 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2021-12-06 20:54:09,985 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 33 treesize of output 35 [2021-12-06 20:54:10,085 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-06 20:54:10,085 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 29 treesize of output 11 [2021-12-06 20:54:10,120 INFO L134 CoverageAnalysis]: Checked inductivity of 7358 backedges. 2322 proven. 666 refuted. 0 times theorem prover too weak. 4370 trivial. 0 not checked. [2021-12-06 20:54:10,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:54:15,097 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 456 treesize of output 430 [2021-12-06 20:54:15,107 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-06 20:54:15,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 671 treesize of output 619 [2021-12-06 20:54:15,114 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 1483 treesize of output 1403 [2021-12-06 20:54:15,129 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-06 20:54:15,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2081 treesize of output 1921 [2021-12-06 20:54:19,557 INFO L134 CoverageAnalysis]: Checked inductivity of 7358 backedges. 2453 proven. 141 refuted. 0 times theorem prover too weak. 4764 trivial. 0 not checked. [2021-12-06 20:54:19,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156674275] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:54:19,558 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:54:19,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 20, 13] total 51 [2021-12-06 20:54:19,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153328601] [2021-12-06 20:54:19,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:54:19,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-06 20:54:19,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:54:19,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-06 20:54:19,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=2251, Unknown=0, NotChecked=0, Total=2550 [2021-12-06 20:54:19,561 INFO L87 Difference]: Start difference. First operand 18357 states and 27635 transitions. Second operand has 51 states, 51 states have (on average 18.96078431372549) internal successors, (967), 51 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:54:21,575 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:54:23,082 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:54:25,106 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:54:27,134 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:54:28,936 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:54:30,833 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:54:32,864 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:54:34,892 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:54:36,923 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:54:38,951 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:54:40,616 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:54:41,743 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:59:51,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:59:51,148 INFO L93 Difference]: Finished difference Result 897993 states and 1322015 transitions. [2021-12-06 20:59:51,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1446 states. [2021-12-06 20:59:51,149 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 18.96078431372549) internal successors, (967), 51 states have internal predecessors, (967), 0 states have call successors, (0), 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 869 [2021-12-06 20:59:51,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:59:52,421 INFO L225 Difference]: With dead ends: 897993 [2021-12-06 20:59:52,421 INFO L226 Difference]: Without dead ends: 879427 [2021-12-06 20:59:52,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4145 GetRequests, 2644 SyntacticMatches, 22 SemanticMatches, 1479 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1050632 ImplicationChecksByTransitivity, 187.2s TimeCoverageRelationStatistics Valid=141202, Invalid=2050678, Unknown=0, NotChecked=0, Total=2191880 [2021-12-06 20:59:52,923 INFO L933 BasicCegarLoop]: 2855 mSDtfsCounter, 24462 mSDsluCounter, 62532 mSDsCounter, 0 mSdLazyCounter, 56455 mSolverCounterSat, 4053 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 103.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24462 SdHoareTripleChecker+Valid, 65387 SdHoareTripleChecker+Invalid, 90117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 4053 IncrementalHoareTripleChecker+Valid, 56455 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 29602 IncrementalHoareTripleChecker+Unchecked, 116.9s IncrementalHoareTripleChecker+Time [2021-12-06 20:59:52,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24462 Valid, 65387 Invalid, 90117 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [4053 Valid, 56455 Invalid, 7 Unknown, 29602 Unchecked, 116.9s Time] [2021-12-06 20:59:53,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879427 states. [2021-12-06 21:00:07,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879427 to 466103. [2021-12-06 21:00:07,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466103 states, 466102 states have (on average 1.4928213137896855) internal successors, (695807), 466102 states have internal predecessors, (695807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:00:08,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466103 states to 466103 states and 695807 transitions. [2021-12-06 21:00:08,480 INFO L78 Accepts]: Start accepts. Automaton has 466103 states and 695807 transitions. Word has length 869 [2021-12-06 21:00:08,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:00:08,481 INFO L470 AbstractCegarLoop]: Abstraction has 466103 states and 695807 transitions. [2021-12-06 21:00:08,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 18.96078431372549) internal successors, (967), 51 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:00:08,481 INFO L276 IsEmpty]: Start isEmpty. Operand 466103 states and 695807 transitions. [2021-12-06 21:00:09,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 872 [2021-12-06 21:00:09,037 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:00:09,037 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 23, 23, 23, 23, 23, 23, 22, 22, 21, 21, 20, 20, 19, 19, 19, 19, 16, 16, 15, 14, 14, 13, 13, 9, 8, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:00:09,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe631736-26b3-4f8f-aaa4-7944ca0f22c5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-06 21:00:09,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe631736-26b3-4f8f-aaa4-7944ca0f22c5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-12-06 21:00:09,239 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:00:09,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:00:09,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1445801576, now seen corresponding path program 1 times [2021-12-06 21:00:09,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:00:09,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876858535] [2021-12-06 21:00:09,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:00:09,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:00:09,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:00:09,729 INFO L134 CoverageAnalysis]: Checked inductivity of 7381 backedges. 2245 proven. 0 refuted. 0 times theorem prover too weak. 5136 trivial. 0 not checked. [2021-12-06 21:00:09,729 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:00:09,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876858535] [2021-12-06 21:00:09,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876858535] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:00:09,729 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:00:09,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 21:00:09,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220072918] [2021-12-06 21:00:09,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:00:09,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 21:00:09,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:00:09,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 21:00:09,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:00:09,731 INFO L87 Difference]: Start difference. First operand 466103 states and 695807 transitions. Second operand has 5 states, 5 states have (on average 37.8) internal successors, (189), 5 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:00:21,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:00:21,902 INFO L93 Difference]: Finished difference Result 928172 states and 1383473 transitions. [2021-12-06 21:00:21,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 21:00:21,903 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 37.8) internal successors, (189), 5 states have internal predecessors, (189), 0 states have call successors, (0), 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 871 [2021-12-06 21:00:21,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:00:22,564 INFO L225 Difference]: With dead ends: 928172 [2021-12-06 21:00:22,564 INFO L226 Difference]: Without dead ends: 462092 [2021-12-06 21:00:22,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-06 21:00:22,907 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 291 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 21:00:22,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 445 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-06 21:00:23,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462092 states. [2021-12-06 21:00:33,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462092 to 443855. [2021-12-06 21:00:33,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443855 states, 443854 states have (on average 1.4800429871083736) internal successors, (656923), 443854 states have internal predecessors, (656923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:00:34,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443855 states to 443855 states and 656923 transitions. [2021-12-06 21:00:34,867 INFO L78 Accepts]: Start accepts. Automaton has 443855 states and 656923 transitions. Word has length 871 [2021-12-06 21:00:34,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:00:34,867 INFO L470 AbstractCegarLoop]: Abstraction has 443855 states and 656923 transitions. [2021-12-06 21:00:34,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 37.8) internal successors, (189), 5 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:00:34,867 INFO L276 IsEmpty]: Start isEmpty. Operand 443855 states and 656923 transitions. [2021-12-06 21:00:35,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 874 [2021-12-06 21:00:35,395 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:00:35,396 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 23, 23, 23, 23, 23, 23, 22, 22, 21, 21, 20, 20, 18, 18, 18, 18, 16, 15, 15, 14, 14, 13, 13, 9, 8, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-06 21:00:35,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-12-06 21:00:35,396 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:00:35,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:00:35,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1785072653, now seen corresponding path program 1 times [2021-12-06 21:00:35,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:00:35,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985653129] [2021-12-06 21:00:35,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:00:35,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:00:35,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:00:35,843 INFO L134 CoverageAnalysis]: Checked inductivity of 7302 backedges. 4017 proven. 0 refuted. 0 times theorem prover too weak. 3285 trivial. 0 not checked. [2021-12-06 21:00:35,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:00:35,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985653129] [2021-12-06 21:00:35,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985653129] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:00:35,843 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:00:35,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 21:00:35,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744744554] [2021-12-06 21:00:35,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:00:35,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:00:35,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:00:35,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:00:35,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:00:35,844 INFO L87 Difference]: Start difference. First operand 443855 states and 656923 transitions. Second operand has 4 states, 4 states have (on average 56.5) internal successors, (226), 4 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) [2021-12-06 21:00:37,087 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 21:00:48,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:00:48,019 INFO L93 Difference]: Finished difference Result 907351 states and 1339695 transitions. [2021-12-06 21:00:48,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 21:00:48,020 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.5) internal successors, (226), 4 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) Word has length 873 [2021-12-06 21:00:48,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:00:48,636 INFO L225 Difference]: With dead ends: 907351 [2021-12-06 21:00:48,636 INFO L226 Difference]: Without dead ends: 463519 [2021-12-06 21:00:48,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:00:48,791 INFO L933 BasicCegarLoop]: 290 mSDtfsCounter, 79 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 709 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-06 21:00:48,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 709 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-06 21:00:49,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463519 states. [2021-12-06 21:01:00,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463519 to 443855. [2021-12-06 21:01:00,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443855 states, 443854 states have (on average 1.478136954944644) internal successors, (656077), 443854 states have internal predecessors, (656077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:01:01,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443855 states to 443855 states and 656077 transitions. [2021-12-06 21:01:01,179 INFO L78 Accepts]: Start accepts. Automaton has 443855 states and 656077 transitions. Word has length 873 [2021-12-06 21:01:01,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:01:01,180 INFO L470 AbstractCegarLoop]: Abstraction has 443855 states and 656077 transitions. [2021-12-06 21:01:01,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.5) internal successors, (226), 4 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) [2021-12-06 21:01:01,180 INFO L276 IsEmpty]: Start isEmpty. Operand 443855 states and 656077 transitions. [2021-12-06 21:01:01,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 875 [2021-12-06 21:01:01,718 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:01:01,719 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 23, 23, 23, 23, 23, 23, 22, 22, 21, 21, 20, 20, 19, 18, 18, 18, 16, 15, 15, 14, 14, 13, 13, 9, 8, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-06 21:01:01,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-12-06 21:01:01,719 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:01:01,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:01:01,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1575509163, now seen corresponding path program 1 times [2021-12-06 21:01:01,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:01:01,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269731129] [2021-12-06 21:01:01,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:01:01,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:01:01,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:01:02,153 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 4035 proven. 0 refuted. 0 times theorem prover too weak. 3285 trivial. 0 not checked. [2021-12-06 21:01:02,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:01:02,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269731129] [2021-12-06 21:01:02,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269731129] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:01:02,154 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:01:02,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 21:01:02,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585268892] [2021-12-06 21:01:02,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:01:02,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:01:02,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:01:02,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:01:02,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:01:02,155 INFO L87 Difference]: Start difference. First operand 443855 states and 656077 transitions. Second operand has 4 states, 4 states have (on average 56.75) internal successors, (227), 4 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) [2021-12-06 21:01:03,308 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 21:01:14,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:01:14,170 INFO L93 Difference]: Finished difference Result 904867 states and 1333954 transitions. [2021-12-06 21:01:14,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 21:01:14,171 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.75) internal successors, (227), 4 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) Word has length 874 [2021-12-06 21:01:14,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:01:14,801 INFO L225 Difference]: With dead ends: 904867 [2021-12-06 21:01:14,801 INFO L226 Difference]: Without dead ends: 461035 [2021-12-06 21:01:15,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:01:15,058 INFO L933 BasicCegarLoop]: 285 mSDtfsCounter, 68 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 699 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-06 21:01:15,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 699 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-06 21:01:15,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461035 states. [2021-12-06 21:01:26,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461035 to 443855. [2021-12-06 21:01:26,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443855 states, 443854 states have (on average 1.4762309227809145) internal successors, (655231), 443854 states have internal predecessors, (655231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:01:27,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443855 states to 443855 states and 655231 transitions. [2021-12-06 21:01:27,407 INFO L78 Accepts]: Start accepts. Automaton has 443855 states and 655231 transitions. Word has length 874 [2021-12-06 21:01:27,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:01:27,408 INFO L470 AbstractCegarLoop]: Abstraction has 443855 states and 655231 transitions. [2021-12-06 21:01:27,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.75) internal successors, (227), 4 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) [2021-12-06 21:01:27,408 INFO L276 IsEmpty]: Start isEmpty. Operand 443855 states and 655231 transitions. [2021-12-06 21:01:27,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 876 [2021-12-06 21:01:27,970 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:01:27,970 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 23, 23, 23, 23, 23, 23, 22, 22, 21, 21, 20, 20, 19, 19, 19, 19, 17, 16, 16, 14, 14, 13, 13, 9, 8, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:01:27,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-12-06 21:01:27,971 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:01:27,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:01:27,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1065359527, now seen corresponding path program 1 times [2021-12-06 21:01:27,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:01:27,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517987211] [2021-12-06 21:01:27,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:01:27,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:01:28,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:01:28,257 INFO L134 CoverageAnalysis]: Checked inductivity of 7415 backedges. 4137 proven. 0 refuted. 0 times theorem prover too weak. 3278 trivial. 0 not checked. [2021-12-06 21:01:28,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:01:28,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517987211] [2021-12-06 21:01:28,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517987211] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:01:28,257 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:01:28,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 21:01:28,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559927812] [2021-12-06 21:01:28,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:01:28,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:01:28,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:01:28,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:01:28,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:01:28,259 INFO L87 Difference]: Start difference. First operand 443855 states and 655231 transitions. Second operand has 4 states, 4 states have (on average 57.0) internal successors, (228), 4 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) [2021-12-06 21:01:30,265 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 21:01:41,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:01:41,950 INFO L93 Difference]: Finished difference Result 906313 states and 1333991 transitions. [2021-12-06 21:01:41,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 21:01:41,951 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 57.0) internal successors, (228), 4 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) Word has length 875 [2021-12-06 21:01:41,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:01:42,700 INFO L225 Difference]: With dead ends: 906313 [2021-12-06 21:01:42,700 INFO L226 Difference]: Without dead ends: 462481 [2021-12-06 21:01:42,859 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 [2021-12-06 21:01:42,859 INFO L933 BasicCegarLoop]: 283 mSDtfsCounter, 59 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 696 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-06 21:01:42,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 696 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 224 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-06 21:01:43,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462481 states. [2021-12-06 21:01:54,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462481 to 435561. [2021-12-06 21:01:54,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435561 states, 435560 states have (on average 1.4730209385618513) internal successors, (641589), 435560 states have internal predecessors, (641589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:01:55,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435561 states to 435561 states and 641589 transitions. [2021-12-06 21:01:55,195 INFO L78 Accepts]: Start accepts. Automaton has 435561 states and 641589 transitions. Word has length 875 [2021-12-06 21:01:55,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:01:55,196 INFO L470 AbstractCegarLoop]: Abstraction has 435561 states and 641589 transitions. [2021-12-06 21:01:55,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 57.0) internal successors, (228), 4 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) [2021-12-06 21:01:55,196 INFO L276 IsEmpty]: Start isEmpty. Operand 435561 states and 641589 transitions. [2021-12-06 21:01:55,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 878 [2021-12-06 21:01:55,647 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:01:55,648 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 23, 23, 23, 23, 23, 23, 22, 22, 21, 21, 20, 20, 19, 19, 19, 19, 17, 16, 16, 15, 15, 14, 13, 9, 8, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:01:55,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-12-06 21:01:55,648 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:01:55,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:01:55,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1770516363, now seen corresponding path program 1 times [2021-12-06 21:01:55,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:01:55,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939200733] [2021-12-06 21:01:55,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:01:55,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:01:55,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:01:56,229 INFO L134 CoverageAnalysis]: Checked inductivity of 7452 backedges. 4082 proven. 0 refuted. 0 times theorem prover too weak. 3370 trivial. 0 not checked. [2021-12-06 21:01:56,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:01:56,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939200733] [2021-12-06 21:01:56,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939200733] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:01:56,229 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:01:56,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 21:01:56,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264157471] [2021-12-06 21:01:56,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:01:56,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 21:01:56,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:01:56,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 21:01:56,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:01:56,230 INFO L87 Difference]: Start difference. First operand 435561 states and 641589 transitions. Second operand has 7 states, 7 states have (on average 32.42857142857143) internal successors, (227), 7 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) [2021-12-06 21:01:59,125 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 21:02:01,152 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 21:02:15,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:02:15,194 INFO L93 Difference]: Finished difference Result 956715 states and 1402938 transitions. [2021-12-06 21:02:15,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 21:02:15,195 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 32.42857142857143) internal successors, (227), 7 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) Word has length 877 [2021-12-06 21:02:15,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:02:16,028 INFO L225 Difference]: With dead ends: 956715 [2021-12-06 21:02:16,028 INFO L226 Difference]: Without dead ends: 521177 [2021-12-06 21:02:16,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-12-06 21:02:16,183 INFO L933 BasicCegarLoop]: 386 mSDtfsCounter, 353 mSDsluCounter, 984 mSDsCounter, 0 mSdLazyCounter, 940 mSolverCounterSat, 37 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 1370 SdHoareTripleChecker+Invalid, 979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 940 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-12-06 21:02:16,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [353 Valid, 1370 Invalid, 979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 940 Invalid, 2 Unknown, 0 Unchecked, 5.7s Time] [2021-12-06 21:02:16,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521177 states. [2021-12-06 21:02:27,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521177 to 440377. [2021-12-06 21:02:28,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440377 states, 440376 states have (on average 1.4724939597071594) internal successors, (648451), 440376 states have internal predecessors, (648451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:02:28,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440377 states to 440377 states and 648451 transitions. [2021-12-06 21:02:28,947 INFO L78 Accepts]: Start accepts. Automaton has 440377 states and 648451 transitions. Word has length 877 [2021-12-06 21:02:28,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:02:28,947 INFO L470 AbstractCegarLoop]: Abstraction has 440377 states and 648451 transitions. [2021-12-06 21:02:28,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 32.42857142857143) internal successors, (227), 7 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) [2021-12-06 21:02:28,947 INFO L276 IsEmpty]: Start isEmpty. Operand 440377 states and 648451 transitions. [2021-12-06 21:02:29,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 878 [2021-12-06 21:02:29,377 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:02:29,377 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 23, 23, 23, 23, 23, 23, 22, 22, 21, 21, 20, 20, 19, 19, 19, 19, 17, 16, 16, 15, 15, 14, 13, 9, 8, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:02:29,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-12-06 21:02:29,378 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:02:29,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:02:29,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1714789751, now seen corresponding path program 2 times [2021-12-06 21:02:29,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:02:29,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292410905] [2021-12-06 21:02:29,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:02:29,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:02:29,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:02:29,934 INFO L134 CoverageAnalysis]: Checked inductivity of 7452 backedges. 4449 proven. 0 refuted. 0 times theorem prover too weak. 3003 trivial. 0 not checked. [2021-12-06 21:02:29,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:02:29,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292410905] [2021-12-06 21:02:29,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292410905] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:02:29,934 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:02:29,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 21:02:29,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587362657] [2021-12-06 21:02:29,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:02:29,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 21:02:29,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:02:29,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 21:02:29,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:02:29,935 INFO L87 Difference]: Start difference. First operand 440377 states and 648451 transitions. Second operand has 7 states, 7 states have (on average 37.142857142857146) internal successors, (260), 7 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:02:31,934 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 21:02:33,967 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 21:02:35,997 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 21:02:52,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:02:52,103 INFO L93 Difference]: Finished difference Result 1064907 states and 1565310 transitions. [2021-12-06 21:02:52,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 21:02:52,105 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 37.142857142857146) internal successors, (260), 7 states have internal predecessors, (260), 0 states have call successors, (0), 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 877 [2021-12-06 21:02:52,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:02:53,018 INFO L225 Difference]: With dead ends: 1064907 [2021-12-06 21:02:53,018 INFO L226 Difference]: Without dead ends: 624169 [2021-12-06 21:02:53,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-12-06 21:02:53,178 INFO L933 BasicCegarLoop]: 440 mSDtfsCounter, 546 mSDsluCounter, 1018 mSDsCounter, 0 mSdLazyCounter, 951 mSolverCounterSat, 114 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 546 SdHoareTripleChecker+Valid, 1458 SdHoareTripleChecker+Invalid, 1067 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 951 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2021-12-06 21:02:53,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [546 Valid, 1458 Invalid, 1067 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 951 Invalid, 2 Unknown, 0 Unchecked, 7.2s Time] [2021-12-06 21:02:53,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624169 states. [2021-12-06 21:03:06,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624169 to 502053. [2021-12-06 21:03:07,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502053 states, 502052 states have (on average 1.4726303251456025) internal successors, (739337), 502052 states have internal predecessors, (739337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:03:08,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502053 states to 502053 states and 739337 transitions. [2021-12-06 21:03:08,170 INFO L78 Accepts]: Start accepts. Automaton has 502053 states and 739337 transitions. Word has length 877 [2021-12-06 21:03:08,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:03:08,170 INFO L470 AbstractCegarLoop]: Abstraction has 502053 states and 739337 transitions. [2021-12-06 21:03:08,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 37.142857142857146) internal successors, (260), 7 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:03:08,171 INFO L276 IsEmpty]: Start isEmpty. Operand 502053 states and 739337 transitions. [2021-12-06 21:03:08,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 881 [2021-12-06 21:03:08,697 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:03:08,698 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 24, 24, 24, 23, 23, 23, 21, 21, 20, 20, 19, 19, 18, 18, 18, 18, 16, 15, 15, 14, 14, 13, 13, 9, 8, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-06 21:03:08,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-12-06 21:03:08,698 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:03:08,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:03:08,699 INFO L85 PathProgramCache]: Analyzing trace with hash 842827957, now seen corresponding path program 1 times [2021-12-06 21:03:08,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:03:08,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550113352] [2021-12-06 21:03:08,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:03:08,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:03:08,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:03:09,143 INFO L134 CoverageAnalysis]: Checked inductivity of 7511 backedges. 4042 proven. 0 refuted. 0 times theorem prover too weak. 3469 trivial. 0 not checked. [2021-12-06 21:03:09,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:03:09,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550113352] [2021-12-06 21:03:09,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550113352] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:03:09,144 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:03:09,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 21:03:09,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782022547] [2021-12-06 21:03:09,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:03:09,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:03:09,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:03:09,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:03:09,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:03:09,145 INFO L87 Difference]: Start difference. First operand 502053 states and 739337 transitions. Second operand has 4 states, 4 states have (on average 54.25) internal successors, (217), 4 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:03:10,727 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 21:03:24,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:03:24,035 INFO L93 Difference]: Finished difference Result 1021041 states and 1500410 transitions. [2021-12-06 21:03:24,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 21:03:24,036 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 54.25) internal successors, (217), 4 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 880 [2021-12-06 21:03:24,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:03:24,719 INFO L225 Difference]: With dead ends: 1021041 [2021-12-06 21:03:24,719 INFO L226 Difference]: Without dead ends: 519011 [2021-12-06 21:03:24,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:03:24,988 INFO L933 BasicCegarLoop]: 280 mSDtfsCounter, 73 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 689 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-06 21:03:24,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 689 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-06 21:03:25,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519011 states. [2021-12-06 21:03:38,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519011 to 502053. [2021-12-06 21:03:38,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502053 states, 502052 states have (on average 1.4709173551743644) internal successors, (738477), 502052 states have internal predecessors, (738477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:03:39,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502053 states to 502053 states and 738477 transitions. [2021-12-06 21:03:39,519 INFO L78 Accepts]: Start accepts. Automaton has 502053 states and 738477 transitions. Word has length 880 [2021-12-06 21:03:39,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:03:39,519 INFO L470 AbstractCegarLoop]: Abstraction has 502053 states and 738477 transitions. [2021-12-06 21:03:39,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.25) internal successors, (217), 4 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:03:39,519 INFO L276 IsEmpty]: Start isEmpty. Operand 502053 states and 738477 transitions. [2021-12-06 21:03:40,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 882 [2021-12-06 21:03:40,209 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:03:40,210 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 24, 24, 24, 24, 23, 23, 21, 21, 20, 20, 19, 19, 18, 18, 18, 18, 16, 15, 15, 14, 14, 13, 13, 9, 8, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1] [2021-12-06 21:03:40,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2021-12-06 21:03:40,210 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:03:40,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:03:40,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1261195118, now seen corresponding path program 1 times [2021-12-06 21:03:40,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:03:40,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114903994] [2021-12-06 21:03:40,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:03:40,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:03:40,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:03:40,498 INFO L134 CoverageAnalysis]: Checked inductivity of 7534 backedges. 4065 proven. 0 refuted. 0 times theorem prover too weak. 3469 trivial. 0 not checked. [2021-12-06 21:03:40,498 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:03:40,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114903994] [2021-12-06 21:03:40,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114903994] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:03:40,498 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:03:40,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 21:03:40,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078933838] [2021-12-06 21:03:40,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:03:40,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:03:40,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:03:40,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:03:40,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:03:40,499 INFO L87 Difference]: Start difference. First operand 502053 states and 738477 transitions. Second operand has 4 states, 4 states have (on average 54.5) internal successors, (218), 4 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:03:42,505 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []