./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 64bit --witnessprinter.graph.data.programhash 4fce72e4c86270281dd05ead367908aebeea58cd11d1d4da51b0e6a5af67a67d --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 09:31:47,129 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 09:31:47,132 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 09:31:47,176 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 09:31:47,177 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 09:31:47,178 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 09:31:47,182 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 09:31:47,185 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 09:31:47,187 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 09:31:47,193 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 09:31:47,194 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 09:31:47,196 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 09:31:47,197 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 09:31:47,198 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 09:31:47,200 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 09:31:47,207 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 09:31:47,207 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 09:31:47,209 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 09:31:47,211 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 09:31:47,215 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 09:31:47,217 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 09:31:47,218 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 09:31:47,220 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 09:31:47,221 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 09:31:47,222 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 09:31:47,227 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 09:31:47,227 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 09:31:47,227 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 09:31:47,228 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 09:31:47,229 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 09:31:47,230 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 09:31:47,230 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 09:31:47,231 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 09:31:47,232 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 09:31:47,233 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 09:31:47,234 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 09:31:47,235 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 09:31:47,235 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 09:31:47,235 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 09:31:47,236 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 09:31:47,236 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 09:31:47,238 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 09:31:47,246 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-07-21 09:31:47,274 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 09:31:47,276 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 09:31:47,276 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 09:31:47,276 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 09:31:47,277 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 09:31:47,277 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 09:31:47,278 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 09:31:47,278 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 09:31:47,278 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 09:31:47,279 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 09:31:47,279 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 09:31:47,280 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 09:31:47,280 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 09:31:47,280 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 09:31:47,288 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 09:31:47,288 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 09:31:47,288 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 09:31:47,289 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 09:31:47,289 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 09:31:47,289 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 09:31:47,289 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 09:31:47,289 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 09:31:47,290 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 09:31:47,290 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 09:31:47,290 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 09:31:47,291 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 09:31:47,291 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 09:31:47,291 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 09:31:47,291 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 09:31:47,291 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 09:31:47,292 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4fce72e4c86270281dd05ead367908aebeea58cd11d1d4da51b0e6a5af67a67d [2022-07-21 09:31:47,598 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 09:31:47,627 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 09:31:47,629 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 09:31:47,630 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 09:31:47,632 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 09:31:47,634 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i [2022-07-21 09:31:47,686 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38f74c0e5/9868cfdc77fb4cf28ed5a02910b44701/FLAG06f8149ef [2022-07-21 09:31:48,450 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 09:31:48,450 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i [2022-07-21 09:31:48,494 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38f74c0e5/9868cfdc77fb4cf28ed5a02910b44701/FLAG06f8149ef [2022-07-21 09:31:48,661 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38f74c0e5/9868cfdc77fb4cf28ed5a02910b44701 [2022-07-21 09:31:48,663 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 09:31:48,665 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 09:31:48,666 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 09:31:48,666 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 09:31:48,669 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 09:31:48,670 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:31:48" (1/1) ... [2022-07-21 09:31:48,672 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7101be8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:31:48, skipping insertion in model container [2022-07-21 09:31:48,672 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:31:48" (1/1) ... [2022-07-21 09:31:48,688 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 09:31:48,782 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 09:31:49,071 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i[4503,4516] [2022-07-21 09:31:49,079 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i[4563,4576] [2022-07-21 09:31:49,787 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:31:49,789 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:31:49,790 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:31:49,792 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:31:49,792 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:31:49,803 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:31:49,804 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:31:49,805 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:31:49,805 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:31:50,051 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-07-21 09:31:50,052 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-07-21 09:31:50,053 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-07-21 09:31:50,054 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-07-21 09:31:50,055 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-07-21 09:31:50,056 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-07-21 09:31:50,056 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-07-21 09:31:50,057 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-07-21 09:31:50,057 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-07-21 09:31:50,058 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-07-21 09:31:50,158 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-07-21 09:31:50,166 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:31:50,167 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:31:50,232 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:31:50,233 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:31:50,314 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 09:31:50,369 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 09:31:50,390 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i[4503,4516] [2022-07-21 09:31:50,391 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i[4563,4576] [2022-07-21 09:31:50,440 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:31:50,440 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:31:50,441 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:31:50,442 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:31:50,444 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:31:50,451 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:31:50,451 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:31:50,453 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:31:50,454 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:31:50,524 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-07-21 09:31:50,525 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-07-21 09:31:50,525 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-07-21 09:31:50,526 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-07-21 09:31:50,527 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-07-21 09:31:50,527 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-07-21 09:31:50,527 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-07-21 09:31:50,528 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-07-21 09:31:50,529 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-07-21 09:31:50,529 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-07-21 09:31:50,555 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-07-21 09:31:50,561 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:31:50,562 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:31:50,613 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:31:50,613 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:31:50,657 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 09:31:50,924 INFO L208 MainTranslator]: Completed translation [2022-07-21 09:31:50,925 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:31:50 WrapperNode [2022-07-21 09:31:50,925 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 09:31:50,926 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 09:31:50,926 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 09:31:50,926 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 09:31:50,932 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:31:50" (1/1) ... [2022-07-21 09:31:51,037 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:31:50" (1/1) ... [2022-07-21 09:31:51,137 INFO L137 Inliner]: procedures = 692, calls = 2500, calls flagged for inlining = 57, calls inlined = 12, statements flattened = 1003 [2022-07-21 09:31:51,138 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 09:31:51,139 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 09:31:51,139 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 09:31:51,139 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 09:31:51,147 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:31:50" (1/1) ... [2022-07-21 09:31:51,147 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:31:50" (1/1) ... [2022-07-21 09:31:51,160 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:31:50" (1/1) ... [2022-07-21 09:31:51,161 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:31:50" (1/1) ... [2022-07-21 09:31:51,208 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:31:50" (1/1) ... [2022-07-21 09:31:51,215 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:31:50" (1/1) ... [2022-07-21 09:31:51,232 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:31:50" (1/1) ... [2022-07-21 09:31:51,247 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 09:31:51,248 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 09:31:51,249 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 09:31:51,249 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 09:31:51,249 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:31:50" (1/1) ... [2022-07-21 09:31:51,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 09:31:51,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:31:51,280 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-21 09:31:51,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-21 09:31:51,318 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2022-07-21 09:31:51,319 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2022-07-21 09:31:51,319 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 09:31:51,319 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2022-07-21 09:31:51,320 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2022-07-21 09:31:51,320 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 09:31:51,320 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2022-07-21 09:31:51,321 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2022-07-21 09:31:51,321 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-21 09:31:51,321 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-21 09:31:51,322 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-21 09:31:51,322 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 09:31:51,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-21 09:31:51,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 09:31:51,322 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 09:31:51,322 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2022-07-21 09:31:51,322 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2022-07-21 09:31:51,323 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_realloc [2022-07-21 09:31:51,323 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_realloc [2022-07-21 09:31:51,323 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_release [2022-07-21 09:31:51,323 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_release [2022-07-21 09:31:51,324 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-21 09:31:51,324 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-21 09:31:51,324 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 09:31:51,324 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_plus [2022-07-21 09:31:51,325 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_plus [2022-07-21 09:31:51,325 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-21 09:31:51,325 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-21 09:31:51,325 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2022-07-21 09:31:51,325 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2022-07-21 09:31:51,325 INFO L130 BoogieDeclarations]: Found specification of procedure aws_add_size_checked [2022-07-21 09:31:51,326 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_add_size_checked [2022-07-21 09:31:51,326 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 09:31:51,326 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 09:31:51,603 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 09:31:51,604 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 09:31:52,624 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 09:31:52,633 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 09:31:52,633 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2022-07-21 09:31:52,636 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:31:52 BoogieIcfgContainer [2022-07-21 09:31:52,636 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 09:31:52,638 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 09:31:52,638 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 09:31:52,641 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 09:31:52,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 09:31:48" (1/3) ... [2022-07-21 09:31:52,642 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36f45fff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:31:52, skipping insertion in model container [2022-07-21 09:31:52,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:31:50" (2/3) ... [2022-07-21 09:31:52,642 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36f45fff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:31:52, skipping insertion in model container [2022-07-21 09:31:52,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:31:52" (3/3) ... [2022-07-21 09:31:52,644 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_reserve_relative_harness.i [2022-07-21 09:31:52,656 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 09:31:52,657 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 09:31:52,712 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 09:31:52,722 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@79cd0207, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@270804cb [2022-07-21 09:31:52,723 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-21 09:31:52,729 INFO L276 IsEmpty]: Start isEmpty. Operand has 160 states, 111 states have (on average 1.3153153153153154) internal successors, (146), 110 states have internal predecessors, (146), 38 states have call successors, (38), 11 states have call predecessors, (38), 11 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2022-07-21 09:31:52,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-21 09:31:52,740 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:31:52,740 INFO L195 NwaCegarLoop]: 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] [2022-07-21 09:31:52,741 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:31:52,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:31:52,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1108355223, now seen corresponding path program 1 times [2022-07-21 09:31:52,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:31:52,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407493331] [2022-07-21 09:31:52,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:31:52,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:31:53,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:53,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:31:53,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:53,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 09:31:53,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:53,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:31:53,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:53,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-21 09:31:53,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:53,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-21 09:31:53,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:53,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-21 09:31:53,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:53,371 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 09:31:53,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:31:53,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407493331] [2022-07-21 09:31:53,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407493331] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:31:53,373 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:31:53,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 09:31:53,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171784120] [2022-07-21 09:31:53,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:31:53,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 09:31:53,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:31:53,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 09:31:53,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 09:31:53,404 INFO L87 Difference]: Start difference. First operand has 160 states, 111 states have (on average 1.3153153153153154) internal successors, (146), 110 states have internal predecessors, (146), 38 states have call successors, (38), 11 states have call predecessors, (38), 11 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 2 states have internal predecessors, (30), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-21 09:31:53,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:31:53,683 INFO L93 Difference]: Finished difference Result 320 states and 455 transitions. [2022-07-21 09:31:53,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 09:31:53,686 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 2 states have internal predecessors, (30), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 46 [2022-07-21 09:31:53,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:31:53,695 INFO L225 Difference]: With dead ends: 320 [2022-07-21 09:31:53,696 INFO L226 Difference]: Without dead ends: 165 [2022-07-21 09:31:53,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 09:31:53,702 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 122 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 09:31:53,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 333 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 09:31:53,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-07-21 09:31:53,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 155. [2022-07-21 09:31:53,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 105 states have (on average 1.2571428571428571) internal successors, (132), 106 states have internal predecessors, (132), 38 states have call successors, (38), 11 states have call predecessors, (38), 11 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-07-21 09:31:53,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 207 transitions. [2022-07-21 09:31:53,748 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 207 transitions. Word has length 46 [2022-07-21 09:31:53,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:31:53,749 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 207 transitions. [2022-07-21 09:31:53,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 2 states have internal predecessors, (30), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-21 09:31:53,750 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 207 transitions. [2022-07-21 09:31:53,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-21 09:31:53,752 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:31:53,752 INFO L195 NwaCegarLoop]: 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] [2022-07-21 09:31:53,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 09:31:53,753 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:31:53,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:31:53,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1165194515, now seen corresponding path program 1 times [2022-07-21 09:31:53,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:31:53,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402720953] [2022-07-21 09:31:53,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:31:53,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:31:53,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:53,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:31:53,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:53,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 09:31:53,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:53,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:31:53,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:53,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-21 09:31:53,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:53,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-21 09:31:53,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:54,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-21 09:31:54,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:54,018 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 09:31:54,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:31:54,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402720953] [2022-07-21 09:31:54,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402720953] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:31:54,019 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:31:54,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 09:31:54,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013076664] [2022-07-21 09:31:54,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:31:54,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 09:31:54,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:31:54,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 09:31:54,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-21 09:31:54,022 INFO L87 Difference]: Start difference. First operand 155 states and 207 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 5 states have internal predecessors, (30), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-21 09:31:54,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:31:54,486 INFO L93 Difference]: Finished difference Result 307 states and 413 transitions. [2022-07-21 09:31:54,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 09:31:54,487 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 5 states have internal predecessors, (30), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 46 [2022-07-21 09:31:54,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:31:54,489 INFO L225 Difference]: With dead ends: 307 [2022-07-21 09:31:54,490 INFO L226 Difference]: Without dead ends: 168 [2022-07-21 09:31:54,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 09:31:54,492 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 202 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 09:31:54,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 523 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 09:31:54,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-07-21 09:31:54,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 158. [2022-07-21 09:31:54,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 107 states have (on average 1.2523364485981308) internal successors, (134), 109 states have internal predecessors, (134), 38 states have call successors, (38), 11 states have call predecessors, (38), 12 states have return successors, (43), 37 states have call predecessors, (43), 37 states have call successors, (43) [2022-07-21 09:31:54,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 215 transitions. [2022-07-21 09:31:54,507 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 215 transitions. Word has length 46 [2022-07-21 09:31:54,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:31:54,508 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 215 transitions. [2022-07-21 09:31:54,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 5 states have internal predecessors, (30), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-21 09:31:54,508 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 215 transitions. [2022-07-21 09:31:54,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-21 09:31:54,510 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:31:54,510 INFO L195 NwaCegarLoop]: 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] [2022-07-21 09:31:54,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 09:31:54,510 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:31:54,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:31:54,511 INFO L85 PathProgramCache]: Analyzing trace with hash 862482782, now seen corresponding path program 1 times [2022-07-21 09:31:54,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:31:54,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096571873] [2022-07-21 09:31:54,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:31:54,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:31:54,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:54,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:31:54,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:54,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 09:31:54,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:54,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:31:54,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:54,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-21 09:31:54,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:54,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-21 09:31:54,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:54,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-21 09:31:54,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:54,784 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 09:31:54,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:31:54,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096571873] [2022-07-21 09:31:54,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096571873] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:31:54,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:31:54,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-21 09:31:54,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914001759] [2022-07-21 09:31:54,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:31:54,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 09:31:54,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:31:54,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 09:31:54,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-21 09:31:54,794 INFO L87 Difference]: Start difference. First operand 158 states and 215 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-21 09:31:55,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:31:55,304 INFO L93 Difference]: Finished difference Result 210 states and 276 transitions. [2022-07-21 09:31:55,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 09:31:55,307 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 52 [2022-07-21 09:31:55,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:31:55,309 INFO L225 Difference]: With dead ends: 210 [2022-07-21 09:31:55,309 INFO L226 Difference]: Without dead ends: 172 [2022-07-21 09:31:55,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-07-21 09:31:55,310 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 125 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 699 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 09:31:55,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 699 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-21 09:31:55,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-07-21 09:31:55,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 160. [2022-07-21 09:31:55,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 109 states have (on average 1.2477064220183487) internal successors, (136), 111 states have internal predecessors, (136), 38 states have call successors, (38), 11 states have call predecessors, (38), 12 states have return successors, (43), 37 states have call predecessors, (43), 37 states have call successors, (43) [2022-07-21 09:31:55,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 217 transitions. [2022-07-21 09:31:55,333 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 217 transitions. Word has length 52 [2022-07-21 09:31:55,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:31:55,333 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 217 transitions. [2022-07-21 09:31:55,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-21 09:31:55,334 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 217 transitions. [2022-07-21 09:31:55,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-21 09:31:55,342 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:31:55,342 INFO L195 NwaCegarLoop]: 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] [2022-07-21 09:31:55,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 09:31:55,343 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:31:55,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:31:55,343 INFO L85 PathProgramCache]: Analyzing trace with hash 877723525, now seen corresponding path program 1 times [2022-07-21 09:31:55,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:31:55,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145980434] [2022-07-21 09:31:55,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:31:55,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:31:55,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:55,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:31:55,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:55,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 09:31:55,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:55,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:31:55,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:55,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-21 09:31:55,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:55,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-21 09:31:55,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:55,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-21 09:31:55,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:55,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-21 09:31:55,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:55,672 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 09:31:55,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:31:55,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145980434] [2022-07-21 09:31:55,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145980434] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:31:55,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546474033] [2022-07-21 09:31:55,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:31:55,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:31:55,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:31:55,679 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:31:55,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 09:31:56,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:56,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 2471 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 09:31:56,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:31:56,203 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:31:56,203 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 09:31:56,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546474033] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:31:56,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 09:31:56,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 15 [2022-07-21 09:31:56,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578229218] [2022-07-21 09:31:56,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:31:56,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 09:31:56,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:31:56,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 09:31:56,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2022-07-21 09:31:56,206 INFO L87 Difference]: Start difference. First operand 160 states and 217 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-07-21 09:31:56,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:31:56,248 INFO L93 Difference]: Finished difference Result 204 states and 270 transitions. [2022-07-21 09:31:56,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 09:31:56,249 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 60 [2022-07-21 09:31:56,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:31:56,250 INFO L225 Difference]: With dead ends: 204 [2022-07-21 09:31:56,250 INFO L226 Difference]: Without dead ends: 166 [2022-07-21 09:31:56,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2022-07-21 09:31:56,252 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 3 mSDsluCounter, 815 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1024 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 09:31:56,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 1024 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 09:31:56,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-07-21 09:31:56,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 160. [2022-07-21 09:31:56,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 109 states have (on average 1.2477064220183487) internal successors, (136), 111 states have internal predecessors, (136), 38 states have call successors, (38), 11 states have call predecessors, (38), 12 states have return successors, (43), 37 states have call predecessors, (43), 37 states have call successors, (43) [2022-07-21 09:31:56,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 217 transitions. [2022-07-21 09:31:56,265 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 217 transitions. Word has length 60 [2022-07-21 09:31:56,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:31:56,265 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 217 transitions. [2022-07-21 09:31:56,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-07-21 09:31:56,266 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 217 transitions. [2022-07-21 09:31:56,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-21 09:31:56,267 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:31:56,267 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-21 09:31:56,299 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-21 09:31:56,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:31:56,485 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:31:56,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:31:56,486 INFO L85 PathProgramCache]: Analyzing trace with hash -268177860, now seen corresponding path program 1 times [2022-07-21 09:31:56,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:31:56,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809537798] [2022-07-21 09:31:56,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:31:56,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:31:56,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:56,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:31:56,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:56,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 09:31:56,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:56,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:31:56,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:56,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-21 09:31:56,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:56,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-21 09:31:56,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:56,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-21 09:31:56,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:56,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-21 09:31:56,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:56,791 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-21 09:31:56,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:31:56,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809537798] [2022-07-21 09:31:56,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809537798] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:31:56,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:31:56,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-21 09:31:56,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446122747] [2022-07-21 09:31:56,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:31:56,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 09:31:56,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:31:56,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 09:31:56,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-07-21 09:31:56,794 INFO L87 Difference]: Start difference. First operand 160 states and 217 transitions. Second operand has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-07-21 09:31:57,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:31:57,435 INFO L93 Difference]: Finished difference Result 181 states and 244 transitions. [2022-07-21 09:31:57,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 09:31:57,436 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 64 [2022-07-21 09:31:57,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:31:57,438 INFO L225 Difference]: With dead ends: 181 [2022-07-21 09:31:57,438 INFO L226 Difference]: Without dead ends: 174 [2022-07-21 09:31:57,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-07-21 09:31:57,439 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 144 mSDsluCounter, 717 mSDsCounter, 0 mSdLazyCounter, 816 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 921 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 09:31:57,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 921 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 816 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-21 09:31:57,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-07-21 09:31:57,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 164. [2022-07-21 09:31:57,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 112 states have (on average 1.2410714285714286) internal successors, (139), 115 states have internal predecessors, (139), 38 states have call successors, (38), 11 states have call predecessors, (38), 13 states have return successors, (50), 37 states have call predecessors, (50), 37 states have call successors, (50) [2022-07-21 09:31:57,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 227 transitions. [2022-07-21 09:31:57,451 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 227 transitions. Word has length 64 [2022-07-21 09:31:57,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:31:57,451 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 227 transitions. [2022-07-21 09:31:57,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-07-21 09:31:57,452 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 227 transitions. [2022-07-21 09:31:57,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-21 09:31:57,453 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:31:57,453 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-21 09:31:57,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 09:31:57,454 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:31:57,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:31:57,454 INFO L85 PathProgramCache]: Analyzing trace with hash 7549444, now seen corresponding path program 1 times [2022-07-21 09:31:57,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:31:57,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550564931] [2022-07-21 09:31:57,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:31:57,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:31:57,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:57,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:31:57,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:57,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 09:31:57,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:57,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:31:57,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:57,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-21 09:31:57,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:57,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-21 09:31:57,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:57,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-21 09:31:57,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:57,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-21 09:31:57,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:57,810 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 09:31:57,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:31:57,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550564931] [2022-07-21 09:31:57,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550564931] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:31:57,811 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:31:57,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 09:31:57,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346675929] [2022-07-21 09:31:57,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:31:57,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 09:31:57,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:31:57,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 09:31:57,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-21 09:31:57,813 INFO L87 Difference]: Start difference. First operand 164 states and 227 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-07-21 09:31:58,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:31:58,367 INFO L93 Difference]: Finished difference Result 347 states and 495 transitions. [2022-07-21 09:31:58,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 09:31:58,367 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 68 [2022-07-21 09:31:58,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:31:58,369 INFO L225 Difference]: With dead ends: 347 [2022-07-21 09:31:58,369 INFO L226 Difference]: Without dead ends: 199 [2022-07-21 09:31:58,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2022-07-21 09:31:58,370 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 201 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 09:31:58,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 599 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-21 09:31:58,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-07-21 09:31:58,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 169. [2022-07-21 09:31:58,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 117 states have (on average 1.2478632478632479) internal successors, (146), 120 states have internal predecessors, (146), 38 states have call successors, (38), 11 states have call predecessors, (38), 13 states have return successors, (50), 37 states have call predecessors, (50), 37 states have call successors, (50) [2022-07-21 09:31:58,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 234 transitions. [2022-07-21 09:31:58,381 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 234 transitions. Word has length 68 [2022-07-21 09:31:58,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:31:58,382 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 234 transitions. [2022-07-21 09:31:58,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-07-21 09:31:58,382 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 234 transitions. [2022-07-21 09:31:58,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-21 09:31:58,383 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:31:58,383 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-21 09:31:58,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-21 09:31:58,383 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:31:58,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:31:58,384 INFO L85 PathProgramCache]: Analyzing trace with hash 265714882, now seen corresponding path program 1 times [2022-07-21 09:31:58,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:31:58,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559218186] [2022-07-21 09:31:58,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:31:58,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:31:58,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:58,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:31:58,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:58,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 09:31:58,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:58,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:31:58,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:58,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-21 09:31:58,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:58,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-21 09:31:58,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:58,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-21 09:31:58,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:58,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-21 09:31:58,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:58,913 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 09:31:58,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:31:58,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559218186] [2022-07-21 09:31:58,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559218186] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:31:58,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365848341] [2022-07-21 09:31:58,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:31:58,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:31:58,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:31:58,916 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:31:58,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 09:31:59,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:59,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 2490 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-21 09:31:59,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:31:59,457 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 09:31:59,718 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 09:31:59,721 INFO L356 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-07-21 09:31:59,721 INFO L390 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 24 treesize of output 1 [2022-07-21 09:31:59,723 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:31:59,724 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 09:31:59,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365848341] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:31:59,724 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 09:31:59,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 17 [2022-07-21 09:31:59,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947887826] [2022-07-21 09:31:59,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:31:59,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-21 09:31:59,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:31:59,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-21 09:31:59,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-07-21 09:31:59,726 INFO L87 Difference]: Start difference. First operand 169 states and 234 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 9 states have internal predecessors, (53), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-21 09:31:59,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:31:59,831 INFO L93 Difference]: Finished difference Result 348 states and 478 transitions. [2022-07-21 09:31:59,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 09:31:59,832 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 9 states have internal predecessors, (53), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 68 [2022-07-21 09:31:59,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:31:59,833 INFO L225 Difference]: With dead ends: 348 [2022-07-21 09:31:59,833 INFO L226 Difference]: Without dead ends: 188 [2022-07-21 09:31:59,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-07-21 09:31:59,835 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 22 mSDsluCounter, 1282 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 1485 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 09:31:59,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 1485 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 75 Unchecked, 0.1s Time] [2022-07-21 09:31:59,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-07-21 09:31:59,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 185. [2022-07-21 09:31:59,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 133 states have (on average 1.255639097744361) internal successors, (167), 135 states have internal predecessors, (167), 38 states have call successors, (38), 12 states have call predecessors, (38), 13 states have return successors, (44), 37 states have call predecessors, (44), 37 states have call successors, (44) [2022-07-21 09:31:59,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 249 transitions. [2022-07-21 09:31:59,854 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 249 transitions. Word has length 68 [2022-07-21 09:31:59,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:31:59,854 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 249 transitions. [2022-07-21 09:31:59,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 9 states have internal predecessors, (53), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-21 09:31:59,855 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 249 transitions. [2022-07-21 09:31:59,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-21 09:31:59,855 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:31:59,856 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-21 09:31:59,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 09:32:00,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-07-21 09:32:00,085 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:00,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:00,085 INFO L85 PathProgramCache]: Analyzing trace with hash -631678396, now seen corresponding path program 1 times [2022-07-21 09:32:00,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:00,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783720882] [2022-07-21 09:32:00,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:00,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:00,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:00,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:32:00,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:00,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 09:32:00,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:00,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:00,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:00,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-21 09:32:00,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:00,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-21 09:32:00,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:00,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-21 09:32:00,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:00,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-21 09:32:00,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:00,274 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:32:00,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:00,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783720882] [2022-07-21 09:32:00,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783720882] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:32:00,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682012438] [2022-07-21 09:32:00,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:00,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:32:00,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:32:00,280 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:32:00,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 09:32:00,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:00,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 2485 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 09:32:00,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:32:00,694 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 09:32:00,694 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 09:32:00,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682012438] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:32:00,694 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 09:32:00,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 6 [2022-07-21 09:32:00,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894163713] [2022-07-21 09:32:00,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:32:00,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 09:32:00,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:32:00,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 09:32:00,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 09:32:00,697 INFO L87 Difference]: Start difference. First operand 185 states and 249 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-21 09:32:00,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:32:00,721 INFO L93 Difference]: Finished difference Result 348 states and 477 transitions. [2022-07-21 09:32:00,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 09:32:00,722 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 68 [2022-07-21 09:32:00,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:32:00,725 INFO L225 Difference]: With dead ends: 348 [2022-07-21 09:32:00,725 INFO L226 Difference]: Without dead ends: 194 [2022-07-21 09:32:00,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-21 09:32:00,726 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 20 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 09:32:00,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 613 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 09:32:00,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-07-21 09:32:00,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 177. [2022-07-21 09:32:00,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 126 states have (on average 1.253968253968254) internal successors, (158), 127 states have internal predecessors, (158), 38 states have call successors, (38), 12 states have call predecessors, (38), 12 states have return successors, (43), 37 states have call predecessors, (43), 37 states have call successors, (43) [2022-07-21 09:32:00,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 239 transitions. [2022-07-21 09:32:00,738 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 239 transitions. Word has length 68 [2022-07-21 09:32:00,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:32:00,738 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 239 transitions. [2022-07-21 09:32:00,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-21 09:32:00,739 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 239 transitions. [2022-07-21 09:32:00,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-21 09:32:00,744 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:32:00,744 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:32:00,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 09:32:00,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:32:00,956 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:00,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:00,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1530819000, now seen corresponding path program 1 times [2022-07-21 09:32:00,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:00,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490925248] [2022-07-21 09:32:00,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:00,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:01,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:01,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:32:01,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:01,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 09:32:01,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:01,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:01,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:01,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-21 09:32:01,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:01,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-21 09:32:01,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:01,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-21 09:32:01,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:01,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-21 09:32:01,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:01,209 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-21 09:32:01,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:01,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490925248] [2022-07-21 09:32:01,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490925248] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:32:01,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400651403] [2022-07-21 09:32:01,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:01,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:32:01,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:32:01,216 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:32:01,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 09:32:01,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:01,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 2497 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-21 09:32:01,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:32:01,680 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:32:01,681 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 09:32:01,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400651403] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:32:01,681 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 09:32:01,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 12 [2022-07-21 09:32:01,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548523519] [2022-07-21 09:32:01,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:32:01,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 09:32:01,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:32:01,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 09:32:01,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2022-07-21 09:32:01,683 INFO L87 Difference]: Start difference. First operand 177 states and 239 transitions. Second operand has 9 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-21 09:32:01,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:32:01,808 INFO L93 Difference]: Finished difference Result 339 states and 467 transitions. [2022-07-21 09:32:01,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 09:32:01,809 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 72 [2022-07-21 09:32:01,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:32:01,810 INFO L225 Difference]: With dead ends: 339 [2022-07-21 09:32:01,810 INFO L226 Difference]: Without dead ends: 185 [2022-07-21 09:32:01,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-07-21 09:32:01,812 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 12 mSDsluCounter, 1322 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1518 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 09:32:01,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 1518 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 09:32:01,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-07-21 09:32:01,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 182. [2022-07-21 09:32:01,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 130 states have (on average 1.2461538461538462) internal successors, (162), 132 states have internal predecessors, (162), 38 states have call successors, (38), 12 states have call predecessors, (38), 13 states have return successors, (50), 37 states have call predecessors, (50), 37 states have call successors, (50) [2022-07-21 09:32:01,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 250 transitions. [2022-07-21 09:32:01,820 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 250 transitions. Word has length 72 [2022-07-21 09:32:01,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:32:01,821 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 250 transitions. [2022-07-21 09:32:01,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-21 09:32:01,821 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 250 transitions. [2022-07-21 09:32:01,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-21 09:32:01,822 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:32:01,822 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:32:01,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 09:32:02,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:32:02,035 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:02,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:02,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1019185037, now seen corresponding path program 1 times [2022-07-21 09:32:02,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:02,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216513610] [2022-07-21 09:32:02,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:02,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:02,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:02,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:32:02,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:02,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 09:32:02,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:02,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:02,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:02,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-21 09:32:02,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:02,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-21 09:32:02,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:02,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-21 09:32:02,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:02,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-21 09:32:02,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:02,191 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-21 09:32:02,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:02,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216513610] [2022-07-21 09:32:02,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216513610] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:32:02,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739705508] [2022-07-21 09:32:02,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:02,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:32:02,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:32:02,193 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:32:02,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 09:32:02,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:02,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 2502 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 09:32:02,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:32:02,640 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 09:32:02,645 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 09:32:02,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739705508] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:32:02,645 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 09:32:02,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 6 [2022-07-21 09:32:02,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928462224] [2022-07-21 09:32:02,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:32:02,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 09:32:02,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:32:02,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 09:32:02,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 09:32:02,647 INFO L87 Difference]: Start difference. First operand 182 states and 250 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-21 09:32:02,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:32:02,678 INFO L93 Difference]: Finished difference Result 346 states and 483 transitions. [2022-07-21 09:32:02,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 09:32:02,679 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 74 [2022-07-21 09:32:02,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:32:02,682 INFO L225 Difference]: With dead ends: 346 [2022-07-21 09:32:02,682 INFO L226 Difference]: Without dead ends: 185 [2022-07-21 09:32:02,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-21 09:32:02,683 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 9 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 09:32:02,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 606 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 09:32:02,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-07-21 09:32:02,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 182. [2022-07-21 09:32:02,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 130 states have (on average 1.2307692307692308) internal successors, (160), 132 states have internal predecessors, (160), 38 states have call successors, (38), 12 states have call predecessors, (38), 13 states have return successors, (50), 37 states have call predecessors, (50), 37 states have call successors, (50) [2022-07-21 09:32:02,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 248 transitions. [2022-07-21 09:32:02,694 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 248 transitions. Word has length 74 [2022-07-21 09:32:02,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:32:02,694 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 248 transitions. [2022-07-21 09:32:02,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-21 09:32:02,695 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 248 transitions. [2022-07-21 09:32:02,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-21 09:32:02,696 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:32:02,696 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-21 09:32:02,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-21 09:32:02,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-21 09:32:02,916 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:02,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:02,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1357293521, now seen corresponding path program 1 times [2022-07-21 09:32:02,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:02,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59385534] [2022-07-21 09:32:02,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:02,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:02,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:03,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:32:03,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:03,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 09:32:03,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:03,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:03,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:03,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-21 09:32:03,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:03,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-21 09:32:03,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:03,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-21 09:32:03,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:03,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-21 09:32:03,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:03,060 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-21 09:32:03,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:03,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59385534] [2022-07-21 09:32:03,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59385534] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:32:03,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65160946] [2022-07-21 09:32:03,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:03,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:32:03,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:32:03,062 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:32:03,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 09:32:03,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:03,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 2504 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 09:32:03,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:32:03,510 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-21 09:32:03,510 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 09:32:03,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65160946] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:32:03,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 09:32:03,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 6 [2022-07-21 09:32:03,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311335729] [2022-07-21 09:32:03,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:32:03,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 09:32:03,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:32:03,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 09:32:03,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 09:32:03,513 INFO L87 Difference]: Start difference. First operand 182 states and 248 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-21 09:32:03,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:32:03,534 INFO L93 Difference]: Finished difference Result 352 states and 498 transitions. [2022-07-21 09:32:03,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 09:32:03,534 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 74 [2022-07-21 09:32:03,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:32:03,536 INFO L225 Difference]: With dead ends: 352 [2022-07-21 09:32:03,536 INFO L226 Difference]: Without dead ends: 191 [2022-07-21 09:32:03,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-21 09:32:03,537 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 34 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 09:32:03,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 604 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 09:32:03,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-07-21 09:32:03,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 178. [2022-07-21 09:32:03,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 126 states have (on average 1.2142857142857142) internal successors, (153), 128 states have internal predecessors, (153), 38 states have call successors, (38), 12 states have call predecessors, (38), 13 states have return successors, (50), 37 states have call predecessors, (50), 37 states have call successors, (50) [2022-07-21 09:32:03,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 241 transitions. [2022-07-21 09:32:03,545 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 241 transitions. Word has length 74 [2022-07-21 09:32:03,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:32:03,545 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 241 transitions. [2022-07-21 09:32:03,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-21 09:32:03,546 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 241 transitions. [2022-07-21 09:32:03,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-21 09:32:03,546 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:32:03,547 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-21 09:32:03,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-21 09:32:03,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:32:03,764 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:03,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:03,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1341774803, now seen corresponding path program 1 times [2022-07-21 09:32:03,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:03,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817840621] [2022-07-21 09:32:03,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:03,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:04,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:04,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:32:04,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:04,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 09:32:04,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:04,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:04,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:04,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-21 09:32:04,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:04,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-21 09:32:04,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:04,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-21 09:32:04,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:04,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-21 09:32:04,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:04,874 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 09:32:04,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:04,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817840621] [2022-07-21 09:32:04,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817840621] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:32:04,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775767696] [2022-07-21 09:32:04,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:04,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:32:04,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:32:04,877 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:32:04,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-21 09:32:05,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:05,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 2499 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-21 09:32:05,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:32:05,338 INFO L390 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 [2022-07-21 09:32:05,869 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 09:32:05,874 INFO L356 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-07-21 09:32:05,875 INFO L390 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 48 treesize of output 1 [2022-07-21 09:32:05,876 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:32:05,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:32:06,266 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 09:32:06,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775767696] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:32:06,267 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:32:06,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 9] total 28 [2022-07-21 09:32:06,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677345110] [2022-07-21 09:32:06,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:32:06,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-21 09:32:06,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:32:06,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-21 09:32:06,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2022-07-21 09:32:06,269 INFO L87 Difference]: Start difference. First operand 178 states and 241 transitions. Second operand has 28 states, 27 states have (on average 4.62962962962963) internal successors, (125), 26 states have internal predecessors, (125), 7 states have call successors, (19), 5 states have call predecessors, (19), 7 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-07-21 09:32:08,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:32:08,256 INFO L93 Difference]: Finished difference Result 263 states and 339 transitions. [2022-07-21 09:32:08,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-21 09:32:08,257 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 4.62962962962963) internal successors, (125), 26 states have internal predecessors, (125), 7 states have call successors, (19), 5 states have call predecessors, (19), 7 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 74 [2022-07-21 09:32:08,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:32:08,258 INFO L225 Difference]: With dead ends: 263 [2022-07-21 09:32:08,258 INFO L226 Difference]: Without dead ends: 235 [2022-07-21 09:32:08,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 141 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=309, Invalid=1497, Unknown=0, NotChecked=0, Total=1806 [2022-07-21 09:32:08,260 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 430 mSDsluCounter, 1196 mSDsCounter, 0 mSdLazyCounter, 1889 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 1408 SdHoareTripleChecker+Invalid, 2484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 481 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-21 09:32:08,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [457 Valid, 1408 Invalid, 2484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1889 Invalid, 0 Unknown, 481 Unchecked, 1.4s Time] [2022-07-21 09:32:08,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-07-21 09:32:08,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 208. [2022-07-21 09:32:08,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 152 states have (on average 1.1973684210526316) internal successors, (182), 155 states have internal predecessors, (182), 39 states have call successors, (39), 15 states have call predecessors, (39), 16 states have return successors, (51), 37 states have call predecessors, (51), 38 states have call successors, (51) [2022-07-21 09:32:08,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 272 transitions. [2022-07-21 09:32:08,286 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 272 transitions. Word has length 74 [2022-07-21 09:32:08,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:32:08,286 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 272 transitions. [2022-07-21 09:32:08,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 4.62962962962963) internal successors, (125), 26 states have internal predecessors, (125), 7 states have call successors, (19), 5 states have call predecessors, (19), 7 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-07-21 09:32:08,287 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 272 transitions. [2022-07-21 09:32:08,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-21 09:32:08,287 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:32:08,288 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:32:08,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-21 09:32:08,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:32:08,498 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:08,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:08,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1784602215, now seen corresponding path program 1 times [2022-07-21 09:32:08,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:08,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078802485] [2022-07-21 09:32:08,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:08,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:08,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:08,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:32:08,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:08,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 09:32:08,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:08,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:08,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:08,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-21 09:32:08,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:08,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-21 09:32:08,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:08,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-21 09:32:08,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:08,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-21 09:32:08,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:08,915 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-21 09:32:08,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:08,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078802485] [2022-07-21 09:32:08,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078802485] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:32:08,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340644147] [2022-07-21 09:32:08,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:08,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:32:08,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:32:08,920 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:32:08,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-21 09:32:09,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:09,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 2496 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-21 09:32:09,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:32:10,203 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:32:10,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:32:10,790 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-21 09:32:10,791 INFO L390 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 39 treesize of output 1 [2022-07-21 09:32:10,984 INFO L356 Elim1Store]: treesize reduction 18, result has 48.6 percent of original size [2022-07-21 09:32:10,984 INFO L390 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 39 treesize of output 35 [2022-07-21 09:32:11,078 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 09:32:11,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340644147] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:32:11,079 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:32:11,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 34 [2022-07-21 09:32:11,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994050792] [2022-07-21 09:32:11,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:32:11,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-21 09:32:11,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:32:11,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-21 09:32:11,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=981, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 09:32:11,081 INFO L87 Difference]: Start difference. First operand 208 states and 272 transitions. Second operand has 34 states, 34 states have (on average 3.588235294117647) internal successors, (122), 32 states have internal predecessors, (122), 6 states have call successors, (18), 5 states have call predecessors, (18), 7 states have return successors, (17), 6 states have call predecessors, (17), 5 states have call successors, (17) [2022-07-21 09:32:13,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:32:13,430 INFO L93 Difference]: Finished difference Result 305 states and 410 transitions. [2022-07-21 09:32:13,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-21 09:32:13,431 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.588235294117647) internal successors, (122), 32 states have internal predecessors, (122), 6 states have call successors, (18), 5 states have call predecessors, (18), 7 states have return successors, (17), 6 states have call predecessors, (17), 5 states have call successors, (17) Word has length 74 [2022-07-21 09:32:13,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:32:13,432 INFO L225 Difference]: With dead ends: 305 [2022-07-21 09:32:13,432 INFO L226 Difference]: Without dead ends: 293 [2022-07-21 09:32:13,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 138 SyntacticMatches, 5 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=542, Invalid=2880, Unknown=0, NotChecked=0, Total=3422 [2022-07-21 09:32:13,434 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 370 mSDsluCounter, 1183 mSDsCounter, 0 mSdLazyCounter, 1590 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 1380 SdHoareTripleChecker+Invalid, 2058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 1590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 342 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-21 09:32:13,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [415 Valid, 1380 Invalid, 2058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 1590 Invalid, 0 Unknown, 342 Unchecked, 1.3s Time] [2022-07-21 09:32:13,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-07-21 09:32:13,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 252. [2022-07-21 09:32:13,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 187 states have (on average 1.1764705882352942) internal successors, (220), 191 states have internal predecessors, (220), 44 states have call successors, (44), 18 states have call predecessors, (44), 20 states have return successors, (68), 42 states have call predecessors, (68), 43 states have call successors, (68) [2022-07-21 09:32:13,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 332 transitions. [2022-07-21 09:32:13,453 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 332 transitions. Word has length 74 [2022-07-21 09:32:13,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:32:13,454 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 332 transitions. [2022-07-21 09:32:13,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.588235294117647) internal successors, (122), 32 states have internal predecessors, (122), 6 states have call successors, (18), 5 states have call predecessors, (18), 7 states have return successors, (17), 6 states have call predecessors, (17), 5 states have call successors, (17) [2022-07-21 09:32:13,454 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 332 transitions. [2022-07-21 09:32:13,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-21 09:32:13,455 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:32:13,455 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-21 09:32:13,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-21 09:32:13,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-21 09:32:13,684 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:13,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:13,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1526436777, now seen corresponding path program 1 times [2022-07-21 09:32:13,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:13,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858232972] [2022-07-21 09:32:13,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:13,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:13,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:13,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:32:13,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:13,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 09:32:13,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:13,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:13,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:13,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-21 09:32:13,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:13,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-21 09:32:13,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:13,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-21 09:32:13,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:13,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-21 09:32:13,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:13,871 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 09:32:13,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:13,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858232972] [2022-07-21 09:32:13,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858232972] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:32:13,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:32:13,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 09:32:13,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559078197] [2022-07-21 09:32:13,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:32:13,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 09:32:13,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:32:13,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 09:32:13,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-21 09:32:13,874 INFO L87 Difference]: Start difference. First operand 252 states and 332 transitions. Second operand has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-07-21 09:32:14,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:32:14,314 INFO L93 Difference]: Finished difference Result 466 states and 627 transitions. [2022-07-21 09:32:14,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 09:32:14,315 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 74 [2022-07-21 09:32:14,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:32:14,317 INFO L225 Difference]: With dead ends: 466 [2022-07-21 09:32:14,317 INFO L226 Difference]: Without dead ends: 265 [2022-07-21 09:32:14,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-07-21 09:32:14,318 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 164 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 09:32:14,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 510 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 09:32:14,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-07-21 09:32:14,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 250. [2022-07-21 09:32:14,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 185 states have (on average 1.162162162162162) internal successors, (215), 189 states have internal predecessors, (215), 44 states have call successors, (44), 18 states have call predecessors, (44), 20 states have return successors, (68), 42 states have call predecessors, (68), 43 states have call successors, (68) [2022-07-21 09:32:14,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 327 transitions. [2022-07-21 09:32:14,336 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 327 transitions. Word has length 74 [2022-07-21 09:32:14,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:32:14,337 INFO L495 AbstractCegarLoop]: Abstraction has 250 states and 327 transitions. [2022-07-21 09:32:14,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-07-21 09:32:14,337 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 327 transitions. [2022-07-21 09:32:14,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-21 09:32:14,338 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:32:14,338 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:32:14,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-21 09:32:14,339 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:14,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:14,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1612971803, now seen corresponding path program 1 times [2022-07-21 09:32:14,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:14,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639440901] [2022-07-21 09:32:14,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:14,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:14,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:14,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:32:14,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:14,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 09:32:14,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:14,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:14,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:14,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-21 09:32:14,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:15,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-21 09:32:15,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:15,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-21 09:32:15,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:15,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-21 09:32:15,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:15,358 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-21 09:32:15,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:15,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639440901] [2022-07-21 09:32:15,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639440901] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:32:15,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870653479] [2022-07-21 09:32:15,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:15,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:32:15,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:32:15,364 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:32:15,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-21 09:32:15,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:15,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 2501 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-21 09:32:15,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:32:15,803 INFO L390 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 [2022-07-21 09:32:16,719 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 09:32:16,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:32:16,730 INFO L356 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2022-07-21 09:32:16,730 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 84 treesize of output 1 [2022-07-21 09:32:16,732 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:32:16,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:32:17,387 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 09:32:17,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870653479] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:32:17,388 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:32:17,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 11] total 33 [2022-07-21 09:32:17,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495650137] [2022-07-21 09:32:17,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:32:17,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-21 09:32:17,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:32:17,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-21 09:32:17,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2022-07-21 09:32:17,389 INFO L87 Difference]: Start difference. First operand 250 states and 327 transitions. Second operand has 33 states, 32 states have (on average 3.9375) internal successors, (126), 31 states have internal predecessors, (126), 7 states have call successors, (19), 5 states have call predecessors, (19), 7 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-07-21 09:32:20,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:32:20,183 INFO L93 Difference]: Finished difference Result 278 states and 361 transitions. [2022-07-21 09:32:20,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-21 09:32:20,183 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 3.9375) internal successors, (126), 31 states have internal predecessors, (126), 7 states have call successors, (19), 5 states have call predecessors, (19), 7 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 74 [2022-07-21 09:32:20,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:32:20,185 INFO L225 Difference]: With dead ends: 278 [2022-07-21 09:32:20,185 INFO L226 Difference]: Without dead ends: 266 [2022-07-21 09:32:20,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 137 SyntacticMatches, 8 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=475, Invalid=2281, Unknown=0, NotChecked=0, Total=2756 [2022-07-21 09:32:20,186 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 343 mSDsluCounter, 1425 mSDsCounter, 0 mSdLazyCounter, 2274 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 1610 SdHoareTripleChecker+Invalid, 2927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 2274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 539 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-21 09:32:20,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [371 Valid, 1610 Invalid, 2927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 2274 Invalid, 0 Unknown, 539 Unchecked, 1.8s Time] [2022-07-21 09:32:20,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-07-21 09:32:20,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 240. [2022-07-21 09:32:20,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 175 states have (on average 1.1657142857142857) internal successors, (204), 180 states have internal predecessors, (204), 44 states have call successors, (44), 17 states have call predecessors, (44), 20 states have return successors, (68), 42 states have call predecessors, (68), 43 states have call successors, (68) [2022-07-21 09:32:20,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 316 transitions. [2022-07-21 09:32:20,203 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 316 transitions. Word has length 74 [2022-07-21 09:32:20,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:32:20,203 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 316 transitions. [2022-07-21 09:32:20,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 3.9375) internal successors, (126), 31 states have internal predecessors, (126), 7 states have call successors, (19), 5 states have call predecessors, (19), 7 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-07-21 09:32:20,203 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 316 transitions. [2022-07-21 09:32:20,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-07-21 09:32:20,205 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:32:20,205 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:32:20,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-21 09:32:20,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-21 09:32:20,419 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:20,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:20,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1710014025, now seen corresponding path program 1 times [2022-07-21 09:32:20,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:20,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686967434] [2022-07-21 09:32:20,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:20,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:20,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:20,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:32:20,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:20,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 09:32:20,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:20,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:20,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:20,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-21 09:32:20,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:20,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-21 09:32:20,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:20,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-21 09:32:20,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:20,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-07-21 09:32:20,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:20,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:20,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:20,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-07-21 09:32:20,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:20,670 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-21 09:32:20,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:20,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686967434] [2022-07-21 09:32:20,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686967434] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:32:20,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674315777] [2022-07-21 09:32:20,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:20,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:32:20,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:32:20,672 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:32:20,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-21 09:32:21,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:21,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 2585 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-21 09:32:21,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:32:21,104 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:32:21,104 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 09:32:21,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674315777] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:32:21,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 09:32:21,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 14 [2022-07-21 09:32:21,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609940304] [2022-07-21 09:32:21,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:32:21,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 09:32:21,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:32:21,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 09:32:21,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-07-21 09:32:21,112 INFO L87 Difference]: Start difference. First operand 240 states and 316 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-21 09:32:21,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:32:21,154 INFO L93 Difference]: Finished difference Result 299 states and 385 transitions. [2022-07-21 09:32:21,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 09:32:21,155 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 78 [2022-07-21 09:32:21,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:32:21,157 INFO L225 Difference]: With dead ends: 299 [2022-07-21 09:32:21,157 INFO L226 Difference]: Without dead ends: 245 [2022-07-21 09:32:21,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2022-07-21 09:32:21,158 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 2 mSDsluCounter, 606 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 810 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 09:32:21,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 810 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 09:32:21,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-07-21 09:32:21,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 245. [2022-07-21 09:32:21,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 179 states have (on average 1.1620111731843576) internal successors, (208), 184 states have internal predecessors, (208), 44 states have call successors, (44), 17 states have call predecessors, (44), 21 states have return successors, (69), 43 states have call predecessors, (69), 43 states have call successors, (69) [2022-07-21 09:32:21,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 321 transitions. [2022-07-21 09:32:21,175 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 321 transitions. Word has length 78 [2022-07-21 09:32:21,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:32:21,176 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 321 transitions. [2022-07-21 09:32:21,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-21 09:32:21,176 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 321 transitions. [2022-07-21 09:32:21,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-21 09:32:21,178 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:32:21,178 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:32:21,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-21 09:32:21,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-21 09:32:21,395 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:21,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:21,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1707972510, now seen corresponding path program 1 times [2022-07-21 09:32:21,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:21,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376000340] [2022-07-21 09:32:21,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:21,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:21,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:21,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:32:21,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:21,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 09:32:21,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:21,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:21,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:21,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-21 09:32:21,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:21,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-21 09:32:21,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:21,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-21 09:32:21,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:21,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-21 09:32:21,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:21,652 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 09:32:21,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:21,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376000340] [2022-07-21 09:32:21,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376000340] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:32:21,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:32:21,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-21 09:32:21,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115806648] [2022-07-21 09:32:21,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:32:21,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-21 09:32:21,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:32:21,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-21 09:32:21,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-07-21 09:32:21,655 INFO L87 Difference]: Start difference. First operand 245 states and 321 transitions. Second operand has 12 states, 11 states have (on average 4.363636363636363) internal successors, (48), 8 states have internal predecessors, (48), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-07-21 09:32:22,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:32:22,399 INFO L93 Difference]: Finished difference Result 262 states and 343 transitions. [2022-07-21 09:32:22,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 09:32:22,400 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.363636363636363) internal successors, (48), 8 states have internal predecessors, (48), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 76 [2022-07-21 09:32:22,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:32:22,401 INFO L225 Difference]: With dead ends: 262 [2022-07-21 09:32:22,402 INFO L226 Difference]: Without dead ends: 238 [2022-07-21 09:32:22,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2022-07-21 09:32:22,403 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 154 mSDsluCounter, 917 mSDsCounter, 0 mSdLazyCounter, 1046 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 1118 SdHoareTripleChecker+Invalid, 1150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1046 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 09:32:22,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 1118 Invalid, 1150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1046 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-21 09:32:22,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-07-21 09:32:22,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 228. [2022-07-21 09:32:22,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 167 states have (on average 1.155688622754491) internal successors, (193), 170 states have internal predecessors, (193), 41 states have call successors, (41), 16 states have call predecessors, (41), 19 states have return successors, (64), 41 states have call predecessors, (64), 40 states have call successors, (64) [2022-07-21 09:32:22,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 298 transitions. [2022-07-21 09:32:22,418 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 298 transitions. Word has length 76 [2022-07-21 09:32:22,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:32:22,419 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 298 transitions. [2022-07-21 09:32:22,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.363636363636363) internal successors, (48), 8 states have internal predecessors, (48), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-07-21 09:32:22,419 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 298 transitions. [2022-07-21 09:32:22,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-21 09:32:22,421 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:32:22,421 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:32:22,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-21 09:32:22,422 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:22,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:22,422 INFO L85 PathProgramCache]: Analyzing trace with hash -992443870, now seen corresponding path program 1 times [2022-07-21 09:32:22,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:22,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687574445] [2022-07-21 09:32:22,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:22,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:22,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:22,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:32:22,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:22,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 09:32:22,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:22,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:22,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:22,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-21 09:32:22,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:22,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-21 09:32:22,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:22,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-21 09:32:22,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:22,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-21 09:32:22,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:23,044 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 09:32:23,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:23,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687574445] [2022-07-21 09:32:23,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687574445] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:32:23,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:32:23,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-07-21 09:32:23,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109797891] [2022-07-21 09:32:23,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:32:23,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-21 09:32:23,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:32:23,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-21 09:32:23,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2022-07-21 09:32:23,047 INFO L87 Difference]: Start difference. First operand 228 states and 298 transitions. Second operand has 17 states, 16 states have (on average 3.625) internal successors, (58), 12 states have internal predecessors, (58), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-21 09:32:24,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:32:24,340 INFO L93 Difference]: Finished difference Result 245 states and 320 transitions. [2022-07-21 09:32:24,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-21 09:32:24,340 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.625) internal successors, (58), 12 states have internal predecessors, (58), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 76 [2022-07-21 09:32:24,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:32:24,346 INFO L225 Difference]: With dead ends: 245 [2022-07-21 09:32:24,346 INFO L226 Difference]: Without dead ends: 210 [2022-07-21 09:32:24,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2022-07-21 09:32:24,347 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 228 mSDsluCounter, 1100 mSDsCounter, 0 mSdLazyCounter, 1864 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 1274 SdHoareTripleChecker+Invalid, 1984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-21 09:32:24,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 1274 Invalid, 1984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1864 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-21 09:32:24,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-07-21 09:32:24,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 189. [2022-07-21 09:32:24,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 136 states have (on average 1.1764705882352942) internal successors, (160), 139 states have internal predecessors, (160), 36 states have call successors, (36), 13 states have call predecessors, (36), 16 states have return successors, (56), 36 states have call predecessors, (56), 35 states have call successors, (56) [2022-07-21 09:32:24,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 252 transitions. [2022-07-21 09:32:24,360 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 252 transitions. Word has length 76 [2022-07-21 09:32:24,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:32:24,361 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 252 transitions. [2022-07-21 09:32:24,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.625) internal successors, (58), 12 states have internal predecessors, (58), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-21 09:32:24,361 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 252 transitions. [2022-07-21 09:32:24,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-07-21 09:32:24,363 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:32:24,363 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:32:24,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-21 09:32:24,363 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:24,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:24,364 INFO L85 PathProgramCache]: Analyzing trace with hash -907054334, now seen corresponding path program 1 times [2022-07-21 09:32:24,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:24,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253998012] [2022-07-21 09:32:24,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:24,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:24,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:24,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:32:24,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:24,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 09:32:24,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:24,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:24,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:24,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-21 09:32:24,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:24,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-21 09:32:24,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:24,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-21 09:32:24,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:24,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-07-21 09:32:24,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:24,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:24,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:24,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-21 09:32:24,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:24,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-07-21 09:32:24,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:24,614 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-21 09:32:24,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:24,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253998012] [2022-07-21 09:32:24,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253998012] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:32:24,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182373290] [2022-07-21 09:32:24,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:24,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:32:24,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:32:24,620 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:32:24,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-21 09:32:25,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:25,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 2589 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 09:32:25,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:32:25,221 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 09:32:25,221 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 09:32:25,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182373290] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:32:25,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 09:32:25,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [12] total 17 [2022-07-21 09:32:25,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144546973] [2022-07-21 09:32:25,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:32:25,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 09:32:25,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:32:25,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 09:32:25,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-07-21 09:32:25,224 INFO L87 Difference]: Start difference. First operand 189 states and 252 transitions. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-21 09:32:25,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:32:25,429 INFO L93 Difference]: Finished difference Result 352 states and 473 transitions. [2022-07-21 09:32:25,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 09:32:25,430 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) Word has length 84 [2022-07-21 09:32:25,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:32:25,432 INFO L225 Difference]: With dead ends: 352 [2022-07-21 09:32:25,432 INFO L226 Difference]: Without dead ends: 192 [2022-07-21 09:32:25,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-07-21 09:32:25,434 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 286 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 09:32:25,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 659 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 09:32:25,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-07-21 09:32:25,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2022-07-21 09:32:25,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 138 states have (on average 1.173913043478261) internal successors, (162), 142 states have internal predecessors, (162), 36 states have call successors, (36), 13 states have call predecessors, (36), 17 states have return successors, (60), 36 states have call predecessors, (60), 35 states have call successors, (60) [2022-07-21 09:32:25,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 258 transitions. [2022-07-21 09:32:25,446 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 258 transitions. Word has length 84 [2022-07-21 09:32:25,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:32:25,447 INFO L495 AbstractCegarLoop]: Abstraction has 192 states and 258 transitions. [2022-07-21 09:32:25,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-21 09:32:25,447 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 258 transitions. [2022-07-21 09:32:25,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-21 09:32:25,448 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:32:25,448 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:32:25,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-21 09:32:25,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:32:25,663 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:25,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:25,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1537117189, now seen corresponding path program 1 times [2022-07-21 09:32:25,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:25,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361190559] [2022-07-21 09:32:25,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:25,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:25,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:25,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:32:25,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:25,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 09:32:25,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:25,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:25,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:25,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-21 09:32:25,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:25,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-21 09:32:25,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:25,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-21 09:32:25,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:25,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-07-21 09:32:25,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:25,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:25,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:25,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-21 09:32:25,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:25,871 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 09:32:25,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:25,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361190559] [2022-07-21 09:32:25,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361190559] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:32:25,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:32:25,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-21 09:32:25,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191552767] [2022-07-21 09:32:25,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:32:25,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 09:32:25,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:32:25,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 09:32:25,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-07-21 09:32:25,873 INFO L87 Difference]: Start difference. First operand 192 states and 258 transitions. Second operand has 10 states, 10 states have (on average 6.0) internal successors, (60), 6 states have internal predecessors, (60), 2 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2022-07-21 09:32:26,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:32:26,401 INFO L93 Difference]: Finished difference Result 268 states and 343 transitions. [2022-07-21 09:32:26,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 09:32:26,401 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 6 states have internal predecessors, (60), 2 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) Word has length 89 [2022-07-21 09:32:26,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:32:26,403 INFO L225 Difference]: With dead ends: 268 [2022-07-21 09:32:26,403 INFO L226 Difference]: Without dead ends: 206 [2022-07-21 09:32:26,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-07-21 09:32:26,404 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 132 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 736 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 09:32:26,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 736 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 680 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-21 09:32:26,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-07-21 09:32:26,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 193. [2022-07-21 09:32:26,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 139 states have (on average 1.1726618705035972) internal successors, (163), 143 states have internal predecessors, (163), 36 states have call successors, (36), 13 states have call predecessors, (36), 17 states have return successors, (60), 36 states have call predecessors, (60), 35 states have call successors, (60) [2022-07-21 09:32:26,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 259 transitions. [2022-07-21 09:32:26,415 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 259 transitions. Word has length 89 [2022-07-21 09:32:26,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:32:26,415 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 259 transitions. [2022-07-21 09:32:26,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 6 states have internal predecessors, (60), 2 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2022-07-21 09:32:26,416 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 259 transitions. [2022-07-21 09:32:26,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-07-21 09:32:26,416 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:32:26,417 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:32:26,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-21 09:32:26,417 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:26,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:26,417 INFO L85 PathProgramCache]: Analyzing trace with hash -381488286, now seen corresponding path program 1 times [2022-07-21 09:32:26,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:26,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357072751] [2022-07-21 09:32:26,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:26,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:26,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:26,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:32:26,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:26,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 09:32:26,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:26,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:26,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:26,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-21 09:32:26,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:26,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-21 09:32:26,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:26,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-21 09:32:26,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:26,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-07-21 09:32:26,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:26,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:26,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:26,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-21 09:32:26,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:26,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-07-21 09:32:26,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:26,696 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-07-21 09:32:26,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:26,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357072751] [2022-07-21 09:32:26,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357072751] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:32:26,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:32:26,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-21 09:32:26,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629069221] [2022-07-21 09:32:26,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:32:26,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-21 09:32:26,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:32:26,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-21 09:32:26,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-07-21 09:32:26,699 INFO L87 Difference]: Start difference. First operand 193 states and 259 transitions. Second operand has 11 states, 10 states have (on average 5.9) internal successors, (59), 6 states have internal predecessors, (59), 2 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2022-07-21 09:32:27,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:32:27,398 INFO L93 Difference]: Finished difference Result 208 states and 274 transitions. [2022-07-21 09:32:27,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 09:32:27,398 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.9) internal successors, (59), 6 states have internal predecessors, (59), 2 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) Word has length 96 [2022-07-21 09:32:27,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:32:27,400 INFO L225 Difference]: With dead ends: 208 [2022-07-21 09:32:27,400 INFO L226 Difference]: Without dead ends: 206 [2022-07-21 09:32:27,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-07-21 09:32:27,401 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 91 mSDsluCounter, 710 mSDsCounter, 0 mSdLazyCounter, 882 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 897 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 09:32:27,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 897 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 882 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-21 09:32:27,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-07-21 09:32:27,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 198. [2022-07-21 09:32:27,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 142 states have (on average 1.1690140845070423) internal successors, (166), 146 states have internal predecessors, (166), 37 states have call successors, (37), 14 states have call predecessors, (37), 18 states have return successors, (61), 37 states have call predecessors, (61), 36 states have call successors, (61) [2022-07-21 09:32:27,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 264 transitions. [2022-07-21 09:32:27,413 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 264 transitions. Word has length 96 [2022-07-21 09:32:27,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:32:27,413 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 264 transitions. [2022-07-21 09:32:27,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.9) internal successors, (59), 6 states have internal predecessors, (59), 2 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2022-07-21 09:32:27,413 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 264 transitions. [2022-07-21 09:32:27,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-07-21 09:32:27,414 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:32:27,415 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2022-07-21 09:32:27,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-21 09:32:27,415 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:27,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:27,415 INFO L85 PathProgramCache]: Analyzing trace with hash -2050117184, now seen corresponding path program 1 times [2022-07-21 09:32:27,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:27,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010520978] [2022-07-21 09:32:27,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:27,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:27,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:27,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:32:27,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:27,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 09:32:27,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:27,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:27,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:27,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-21 09:32:27,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:27,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-21 09:32:27,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:27,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-21 09:32:27,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:27,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-07-21 09:32:27,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:27,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:27,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:27,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-07-21 09:32:27,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:27,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-21 09:32:27,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:27,693 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-21 09:32:27,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:27,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010520978] [2022-07-21 09:32:27,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010520978] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:32:27,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92820702] [2022-07-21 09:32:27,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:27,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:32:27,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:32:27,695 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:32:27,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-21 09:32:28,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:28,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 2645 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-21 09:32:28,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:32:28,279 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-21 09:32:28,279 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 09:32:28,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92820702] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:32:28,280 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 09:32:28,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 18 [2022-07-21 09:32:28,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035622146] [2022-07-21 09:32:28,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:32:28,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 09:32:28,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:32:28,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 09:32:28,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2022-07-21 09:32:28,281 INFO L87 Difference]: Start difference. First operand 198 states and 264 transitions. Second operand has 8 states, 8 states have (on average 8.25) internal successors, (66), 8 states have internal predecessors, (66), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-21 09:32:28,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:32:28,538 INFO L93 Difference]: Finished difference Result 335 states and 444 transitions. [2022-07-21 09:32:28,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 09:32:28,539 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.25) internal successors, (66), 8 states have internal predecessors, (66), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 97 [2022-07-21 09:32:28,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:32:28,540 INFO L225 Difference]: With dead ends: 335 [2022-07-21 09:32:28,540 INFO L226 Difference]: Without dead ends: 199 [2022-07-21 09:32:28,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2022-07-21 09:32:28,542 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 324 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 757 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 09:32:28,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 757 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 09:32:28,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-07-21 09:32:28,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 195. [2022-07-21 09:32:28,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 140 states have (on average 1.1642857142857144) internal successors, (163), 143 states have internal predecessors, (163), 37 states have call successors, (37), 14 states have call predecessors, (37), 17 states have return successors, (57), 37 states have call predecessors, (57), 36 states have call successors, (57) [2022-07-21 09:32:28,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 257 transitions. [2022-07-21 09:32:28,558 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 257 transitions. Word has length 97 [2022-07-21 09:32:28,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:32:28,558 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 257 transitions. [2022-07-21 09:32:28,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.25) internal successors, (66), 8 states have internal predecessors, (66), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-21 09:32:28,559 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 257 transitions. [2022-07-21 09:32:28,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-07-21 09:32:28,560 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:32:28,560 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:32:28,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-21 09:32:28,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-07-21 09:32:28,775 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:28,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:28,776 INFO L85 PathProgramCache]: Analyzing trace with hash -37945624, now seen corresponding path program 1 times [2022-07-21 09:32:28,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:28,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890680916] [2022-07-21 09:32:28,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:28,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:28,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:29,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:32:29,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:29,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 09:32:29,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:29,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:29,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:29,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-21 09:32:29,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:29,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-21 09:32:29,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:29,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-21 09:32:29,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:29,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-07-21 09:32:29,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:29,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:29,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:29,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-21 09:32:29,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:29,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-07-21 09:32:29,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:29,213 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-21 09:32:29,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:29,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890680916] [2022-07-21 09:32:29,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890680916] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:32:29,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768656891] [2022-07-21 09:32:29,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:29,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:32:29,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:32:29,216 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:32:29,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-21 09:32:29,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:29,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 2630 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-21 09:32:29,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:32:29,757 INFO L390 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 11 treesize of output 7 [2022-07-21 09:32:30,382 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:32:30,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:32:30,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768656891] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:32:30,652 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 09:32:30,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2022-07-21 09:32:30,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026374023] [2022-07-21 09:32:30,652 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 09:32:30,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-21 09:32:30,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:32:30,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-21 09:32:30,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=838, Unknown=0, NotChecked=0, Total=930 [2022-07-21 09:32:30,654 INFO L87 Difference]: Start difference. First operand 195 states and 257 transitions. Second operand has 26 states, 25 states have (on average 5.24) internal successors, (131), 21 states have internal predecessors, (131), 10 states have call successors, (19), 7 states have call predecessors, (19), 7 states have return successors, (18), 8 states have call predecessors, (18), 10 states have call successors, (18) [2022-07-21 09:32:33,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:32:33,573 INFO L93 Difference]: Finished difference Result 573 states and 836 transitions. [2022-07-21 09:32:33,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-21 09:32:33,573 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 5.24) internal successors, (131), 21 states have internal predecessors, (131), 10 states have call successors, (19), 7 states have call predecessors, (19), 7 states have return successors, (18), 8 states have call predecessors, (18), 10 states have call successors, (18) Word has length 100 [2022-07-21 09:32:33,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:32:33,576 INFO L225 Difference]: With dead ends: 573 [2022-07-21 09:32:33,576 INFO L226 Difference]: Without dead ends: 407 [2022-07-21 09:32:33,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 129 SyntacticMatches, 5 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=377, Invalid=2929, Unknown=0, NotChecked=0, Total=3306 [2022-07-21 09:32:33,578 INFO L413 NwaCegarLoop]: 364 mSDtfsCounter, 303 mSDsluCounter, 3625 mSDsCounter, 0 mSdLazyCounter, 3002 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 3989 SdHoareTripleChecker+Invalid, 4168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 3002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1016 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-21 09:32:33,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [357 Valid, 3989 Invalid, 4168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 3002 Invalid, 0 Unknown, 1016 Unchecked, 2.1s Time] [2022-07-21 09:32:33,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-07-21 09:32:33,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 221. [2022-07-21 09:32:33,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 163 states have (on average 1.1595092024539877) internal successors, (189), 168 states have internal predecessors, (189), 37 states have call successors, (37), 15 states have call predecessors, (37), 20 states have return successors, (62), 37 states have call predecessors, (62), 36 states have call successors, (62) [2022-07-21 09:32:33,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 288 transitions. [2022-07-21 09:32:33,597 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 288 transitions. Word has length 100 [2022-07-21 09:32:33,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:32:33,597 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 288 transitions. [2022-07-21 09:32:33,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 5.24) internal successors, (131), 21 states have internal predecessors, (131), 10 states have call successors, (19), 7 states have call predecessors, (19), 7 states have return successors, (18), 8 states have call predecessors, (18), 10 states have call successors, (18) [2022-07-21 09:32:33,598 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 288 transitions. [2022-07-21 09:32:33,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-07-21 09:32:33,599 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:32:33,599 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:32:33,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-21 09:32:33,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-07-21 09:32:33,815 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:33,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:33,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1945195624, now seen corresponding path program 1 times [2022-07-21 09:32:33,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:33,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566924237] [2022-07-21 09:32:33,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:33,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:33,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:33,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:32:33,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:33,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 09:32:33,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:33,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:33,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:33,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-21 09:32:33,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:33,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-21 09:32:33,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:33,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-21 09:32:33,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:34,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-07-21 09:32:34,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:34,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:34,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:34,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-21 09:32:34,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:34,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-07-21 09:32:34,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:34,045 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-21 09:32:34,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:34,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566924237] [2022-07-21 09:32:34,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566924237] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:32:34,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739590721] [2022-07-21 09:32:34,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:34,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:32:34,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:32:34,047 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:32:34,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-21 09:32:34,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:34,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 2634 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-21 09:32:34,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:32:35,312 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 27 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:32:35,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:32:47,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739590721] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:32:47,225 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 09:32:47,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16] total 24 [2022-07-21 09:32:47,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358102963] [2022-07-21 09:32:47,226 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 09:32:47,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-21 09:32:47,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:32:47,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-21 09:32:47,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=886, Unknown=3, NotChecked=0, Total=992 [2022-07-21 09:32:47,228 INFO L87 Difference]: Start difference. First operand 221 states and 288 transitions. Second operand has 24 states, 24 states have (on average 5.416666666666667) internal successors, (130), 19 states have internal predecessors, (130), 6 states have call successors, (20), 7 states have call predecessors, (20), 6 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) [2022-07-21 09:32:50,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:32:50,032 INFO L93 Difference]: Finished difference Result 592 states and 828 transitions. [2022-07-21 09:32:50,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-07-21 09:32:50,033 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.416666666666667) internal successors, (130), 19 states have internal predecessors, (130), 6 states have call successors, (20), 7 states have call predecessors, (20), 6 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) Word has length 104 [2022-07-21 09:32:50,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:32:50,035 INFO L225 Difference]: With dead ends: 592 [2022-07-21 09:32:50,035 INFO L226 Difference]: Without dead ends: 374 [2022-07-21 09:32:50,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 130 SyntacticMatches, 5 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=600, Invalid=3687, Unknown=3, NotChecked=0, Total=4290 [2022-07-21 09:32:50,038 INFO L413 NwaCegarLoop]: 277 mSDtfsCounter, 315 mSDsluCounter, 2024 mSDsCounter, 0 mSdLazyCounter, 2672 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 2301 SdHoareTripleChecker+Invalid, 3876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 2672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 995 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-21 09:32:50,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [353 Valid, 2301 Invalid, 3876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 2672 Invalid, 0 Unknown, 995 Unchecked, 1.6s Time] [2022-07-21 09:32:50,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-07-21 09:32:50,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 246. [2022-07-21 09:32:50,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 183 states have (on average 1.1420765027322404) internal successors, (209), 187 states have internal predecessors, (209), 41 states have call successors, (41), 17 states have call predecessors, (41), 21 states have return successors, (68), 41 states have call predecessors, (68), 40 states have call successors, (68) [2022-07-21 09:32:50,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 318 transitions. [2022-07-21 09:32:50,060 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 318 transitions. Word has length 104 [2022-07-21 09:32:50,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:32:50,061 INFO L495 AbstractCegarLoop]: Abstraction has 246 states and 318 transitions. [2022-07-21 09:32:50,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.416666666666667) internal successors, (130), 19 states have internal predecessors, (130), 6 states have call successors, (20), 7 states have call predecessors, (20), 6 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) [2022-07-21 09:32:50,061 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 318 transitions. [2022-07-21 09:32:50,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-07-21 09:32:50,062 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:32:50,063 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-21 09:32:50,091 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-07-21 09:32:50,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:32:50,279 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:50,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:50,279 INFO L85 PathProgramCache]: Analyzing trace with hash 180097083, now seen corresponding path program 1 times [2022-07-21 09:32:50,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:50,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927259150] [2022-07-21 09:32:50,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:50,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:50,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:50,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:32:50,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:50,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 09:32:50,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:50,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:50,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:50,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-21 09:32:50,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:50,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-21 09:32:50,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:50,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-21 09:32:50,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:50,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-07-21 09:32:50,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:50,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:50,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:50,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-21 09:32:50,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:50,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-07-21 09:32:50,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:50,757 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 14 proven. 23 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-21 09:32:50,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:50,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927259150] [2022-07-21 09:32:50,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927259150] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:32:50,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861445665] [2022-07-21 09:32:50,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:50,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:32:50,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:32:50,760 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:32:50,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-21 09:32:51,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:51,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 2641 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-21 09:32:51,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:32:51,644 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 45 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:32:51,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:32:51,898 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-07-21 09:32:51,973 INFO L356 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-07-21 09:32:51,974 INFO L390 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 30 treesize of output 25 [2022-07-21 09:32:52,010 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-21 09:32:52,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861445665] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:32:52,011 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:32:52,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 11] total 27 [2022-07-21 09:32:52,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443842490] [2022-07-21 09:32:52,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:32:52,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-21 09:32:52,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:32:52,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-21 09:32:52,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2022-07-21 09:32:52,018 INFO L87 Difference]: Start difference. First operand 246 states and 318 transitions. Second operand has 27 states, 27 states have (on average 5.925925925925926) internal successors, (160), 22 states have internal predecessors, (160), 8 states have call successors, (25), 6 states have call predecessors, (25), 7 states have return successors, (24), 7 states have call predecessors, (24), 8 states have call successors, (24) [2022-07-21 09:32:55,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:32:55,577 INFO L93 Difference]: Finished difference Result 583 states and 811 transitions. [2022-07-21 09:32:55,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-21 09:32:55,578 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.925925925925926) internal successors, (160), 22 states have internal predecessors, (160), 8 states have call successors, (25), 6 states have call predecessors, (25), 7 states have return successors, (24), 7 states have call predecessors, (24), 8 states have call successors, (24) Word has length 106 [2022-07-21 09:32:55,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:32:55,580 INFO L225 Difference]: With dead ends: 583 [2022-07-21 09:32:55,581 INFO L226 Difference]: Without dead ends: 395 [2022-07-21 09:32:55,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 217 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=503, Invalid=2341, Unknown=18, NotChecked=0, Total=2862 [2022-07-21 09:32:55,583 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 438 mSDsluCounter, 1741 mSDsCounter, 0 mSdLazyCounter, 3353 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 1984 SdHoareTripleChecker+Invalid, 4016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 3353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 411 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-21 09:32:55,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [474 Valid, 1984 Invalid, 4016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 3353 Invalid, 0 Unknown, 411 Unchecked, 2.5s Time] [2022-07-21 09:32:55,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2022-07-21 09:32:55,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 314. [2022-07-21 09:32:55,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 230 states have (on average 1.1608695652173913) internal successors, (267), 233 states have internal predecessors, (267), 61 states have call successors, (61), 19 states have call predecessors, (61), 22 states have return successors, (102), 61 states have call predecessors, (102), 60 states have call successors, (102) [2022-07-21 09:32:55,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 430 transitions. [2022-07-21 09:32:55,615 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 430 transitions. Word has length 106 [2022-07-21 09:32:55,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:32:55,615 INFO L495 AbstractCegarLoop]: Abstraction has 314 states and 430 transitions. [2022-07-21 09:32:55,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.925925925925926) internal successors, (160), 22 states have internal predecessors, (160), 8 states have call successors, (25), 6 states have call predecessors, (25), 7 states have return successors, (24), 7 states have call predecessors, (24), 8 states have call successors, (24) [2022-07-21 09:32:55,615 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 430 transitions. [2022-07-21 09:32:55,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-07-21 09:32:55,617 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:32:55,617 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:32:55,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-21 09:32:55,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:32:55,839 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:55,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:55,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1914201533, now seen corresponding path program 1 times [2022-07-21 09:32:55,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:55,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660726449] [2022-07-21 09:32:55,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:55,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:56,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:56,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:32:56,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:56,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 09:32:56,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:56,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:56,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:56,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-21 09:32:56,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:56,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-21 09:32:56,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:56,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-21 09:32:56,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:56,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-07-21 09:32:56,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:56,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:56,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:56,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-21 09:32:56,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:56,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-07-21 09:32:56,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:56,272 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-21 09:32:56,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:56,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660726449] [2022-07-21 09:32:56,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660726449] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:32:56,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:32:56,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-21 09:32:56,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326971244] [2022-07-21 09:32:56,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:32:56,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-21 09:32:56,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:32:56,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-21 09:32:56,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-07-21 09:32:56,276 INFO L87 Difference]: Start difference. First operand 314 states and 430 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 8 states have internal predecessors, (53), 5 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-21 09:32:56,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:32:56,896 INFO L93 Difference]: Finished difference Result 613 states and 845 transitions. [2022-07-21 09:32:56,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 09:32:56,896 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 8 states have internal predecessors, (53), 5 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 106 [2022-07-21 09:32:56,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:32:56,898 INFO L225 Difference]: With dead ends: 613 [2022-07-21 09:32:56,898 INFO L226 Difference]: Without dead ends: 321 [2022-07-21 09:32:56,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-07-21 09:32:56,900 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 235 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 622 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 09:32:56,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 622 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 680 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-21 09:32:56,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-07-21 09:32:56,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 314. [2022-07-21 09:32:56,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 230 states have (on average 1.1565217391304348) internal successors, (266), 233 states have internal predecessors, (266), 61 states have call successors, (61), 19 states have call predecessors, (61), 22 states have return successors, (102), 61 states have call predecessors, (102), 60 states have call successors, (102) [2022-07-21 09:32:56,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 429 transitions. [2022-07-21 09:32:56,931 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 429 transitions. Word has length 106 [2022-07-21 09:32:56,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:32:56,931 INFO L495 AbstractCegarLoop]: Abstraction has 314 states and 429 transitions. [2022-07-21 09:32:56,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 8 states have internal predecessors, (53), 5 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-21 09:32:56,931 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 429 transitions. [2022-07-21 09:32:56,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-07-21 09:32:56,946 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:32:56,946 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:32:56,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-21 09:32:56,947 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:56,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:56,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1339854717, now seen corresponding path program 1 times [2022-07-21 09:32:56,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:56,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253647282] [2022-07-21 09:32:56,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:56,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:57,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:57,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:32:57,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:57,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-21 09:32:57,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:57,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-21 09:32:57,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:57,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:57,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:57,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-21 09:32:57,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:57,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-21 09:32:57,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:57,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-21 09:32:57,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:57,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-07-21 09:32:57,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:57,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:57,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:57,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-21 09:32:57,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:57,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-07-21 09:32:57,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:58,055 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 30 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-21 09:32:58,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:58,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253647282] [2022-07-21 09:32:58,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253647282] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:32:58,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911693733] [2022-07-21 09:32:58,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:58,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:32:58,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:32:58,060 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:32:58,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-21 09:32:58,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:58,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 2659 conjuncts, 72 conjunts are in the unsatisfiable core [2022-07-21 09:32:58,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:32:58,649 INFO L390 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 [2022-07-21 09:32:58,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:32:58,864 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:32:58,865 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 18 [2022-07-21 09:32:59,446 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 09:32:59,452 INFO L356 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2022-07-21 09:32:59,452 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 84 treesize of output 1 [2022-07-21 09:32:59,454 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 34 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-21 09:32:59,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:33:02,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911693733] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:33:02,024 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 09:33:02,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 28 [2022-07-21 09:33:02,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272492711] [2022-07-21 09:33:02,024 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 09:33:02,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-21 09:33:02,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:33:02,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-21 09:33:02,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1002, Unknown=1, NotChecked=0, Total=1122 [2022-07-21 09:33:02,026 INFO L87 Difference]: Start difference. First operand 314 states and 429 transitions. Second operand has 28 states, 27 states have (on average 4.407407407407407) internal successors, (119), 24 states have internal predecessors, (119), 8 states have call successors, (19), 7 states have call predecessors, (19), 6 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) [2022-07-21 09:33:05,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:33:05,059 INFO L93 Difference]: Finished difference Result 454 states and 617 transitions. [2022-07-21 09:33:05,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-21 09:33:05,060 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 4.407407407407407) internal successors, (119), 24 states have internal predecessors, (119), 8 states have call successors, (19), 7 states have call predecessors, (19), 6 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) Word has length 111 [2022-07-21 09:33:05,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:33:05,062 INFO L225 Difference]: With dead ends: 454 [2022-07-21 09:33:05,062 INFO L226 Difference]: Without dead ends: 391 [2022-07-21 09:33:05,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 148 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=515, Invalid=2449, Unknown=6, NotChecked=0, Total=2970 [2022-07-21 09:33:05,064 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 446 mSDsluCounter, 1245 mSDsCounter, 0 mSdLazyCounter, 2033 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 1463 SdHoareTripleChecker+Invalid, 2616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 2033 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 352 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-21 09:33:05,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [454 Valid, 1463 Invalid, 2616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 2033 Invalid, 0 Unknown, 352 Unchecked, 1.7s Time] [2022-07-21 09:33:05,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2022-07-21 09:33:05,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 324. [2022-07-21 09:33:05,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 240 states have (on average 1.1541666666666666) internal successors, (277), 242 states have internal predecessors, (277), 61 states have call successors, (61), 20 states have call predecessors, (61), 22 states have return successors, (101), 61 states have call predecessors, (101), 60 states have call successors, (101) [2022-07-21 09:33:05,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 439 transitions. [2022-07-21 09:33:05,102 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 439 transitions. Word has length 111 [2022-07-21 09:33:05,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:33:05,102 INFO L495 AbstractCegarLoop]: Abstraction has 324 states and 439 transitions. [2022-07-21 09:33:05,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 4.407407407407407) internal successors, (119), 24 states have internal predecessors, (119), 8 states have call successors, (19), 7 states have call predecessors, (19), 6 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) [2022-07-21 09:33:05,102 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 439 transitions. [2022-07-21 09:33:05,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-07-21 09:33:05,104 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:33:05,104 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:33:05,126 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-07-21 09:33:05,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-21 09:33:05,315 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:33:05,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:33:05,316 INFO L85 PathProgramCache]: Analyzing trace with hash 562499652, now seen corresponding path program 1 times [2022-07-21 09:33:05,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:33:05,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832662322] [2022-07-21 09:33:05,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:33:05,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:33:05,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:05,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:33:05,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:05,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-21 09:33:05,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:05,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-21 09:33:05,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:05,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:33:05,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:05,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-21 09:33:05,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:05,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-21 09:33:05,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:05,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-21 09:33:05,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:05,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-07-21 09:33:05,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:05,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:33:05,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:05,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-21 09:33:05,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:05,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-07-21 09:33:05,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:05,596 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-07-21 09:33:05,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:33:05,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832662322] [2022-07-21 09:33:05,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832662322] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:33:05,597 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:33:05,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-21 09:33:05,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120626011] [2022-07-21 09:33:05,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:33:05,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-21 09:33:05,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:33:05,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-21 09:33:05,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-07-21 09:33:05,599 INFO L87 Difference]: Start difference. First operand 324 states and 439 transitions. Second operand has 13 states, 12 states have (on average 5.166666666666667) internal successors, (62), 8 states have internal predecessors, (62), 2 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2022-07-21 09:33:06,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:33:06,312 INFO L93 Difference]: Finished difference Result 339 states and 455 transitions. [2022-07-21 09:33:06,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 09:33:06,312 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 5.166666666666667) internal successors, (62), 8 states have internal predecessors, (62), 2 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) Word has length 113 [2022-07-21 09:33:06,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:33:06,315 INFO L225 Difference]: With dead ends: 339 [2022-07-21 09:33:06,315 INFO L226 Difference]: Without dead ends: 337 [2022-07-21 09:33:06,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2022-07-21 09:33:06,316 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 147 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 998 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 1030 SdHoareTripleChecker+Invalid, 1093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 998 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 09:33:06,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 1030 Invalid, 1093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 998 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-21 09:33:06,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2022-07-21 09:33:06,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 323. [2022-07-21 09:33:06,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 240 states have (on average 1.1541666666666666) internal successors, (277), 242 states have internal predecessors, (277), 60 states have call successors, (60), 20 states have call predecessors, (60), 22 states have return successors, (100), 60 states have call predecessors, (100), 59 states have call successors, (100) [2022-07-21 09:33:06,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 437 transitions. [2022-07-21 09:33:06,352 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 437 transitions. Word has length 113 [2022-07-21 09:33:06,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:33:06,353 INFO L495 AbstractCegarLoop]: Abstraction has 323 states and 437 transitions. [2022-07-21 09:33:06,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 5.166666666666667) internal successors, (62), 8 states have internal predecessors, (62), 2 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2022-07-21 09:33:06,353 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 437 transitions. [2022-07-21 09:33:06,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-07-21 09:33:06,354 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:33:06,354 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-21 09:33:06,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-21 09:33:06,355 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:33:06,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:33:06,355 INFO L85 PathProgramCache]: Analyzing trace with hash 782483972, now seen corresponding path program 1 times [2022-07-21 09:33:06,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:33:06,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994411012] [2022-07-21 09:33:06,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:33:06,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:33:06,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:06,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:33:06,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:06,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-21 09:33:06,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:07,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-21 09:33:07,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:07,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:33:07,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:07,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-21 09:33:07,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:07,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-21 09:33:07,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:07,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-21 09:33:07,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:07,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-07-21 09:33:07,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:07,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:33:07,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:07,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-21 09:33:07,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:07,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-07-21 09:33:07,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:07,289 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-21 09:33:07,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:33:07,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994411012] [2022-07-21 09:33:07,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994411012] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:33:07,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:33:07,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-21 09:33:07,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401650573] [2022-07-21 09:33:07,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:33:07,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 09:33:07,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:33:07,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 09:33:07,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2022-07-21 09:33:07,291 INFO L87 Difference]: Start difference. First operand 323 states and 437 transitions. Second operand has 20 states, 19 states have (on average 3.736842105263158) internal successors, (71), 14 states have internal predecessors, (71), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2022-07-21 09:33:08,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:33:09,000 INFO L93 Difference]: Finished difference Result 386 states and 542 transitions. [2022-07-21 09:33:09,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-21 09:33:09,000 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.736842105263158) internal successors, (71), 14 states have internal predecessors, (71), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) Word has length 113 [2022-07-21 09:33:09,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:33:09,002 INFO L225 Difference]: With dead ends: 386 [2022-07-21 09:33:09,002 INFO L226 Difference]: Without dead ends: 384 [2022-07-21 09:33:09,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=185, Invalid=1005, Unknown=0, NotChecked=0, Total=1190 [2022-07-21 09:33:09,003 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 347 mSDsluCounter, 1513 mSDsCounter, 0 mSdLazyCounter, 2551 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 1720 SdHoareTripleChecker+Invalid, 2776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 2551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-21 09:33:09,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [378 Valid, 1720 Invalid, 2776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 2551 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-21 09:33:09,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2022-07-21 09:33:09,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 327. [2022-07-21 09:33:09,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 243 states have (on average 1.1522633744855968) internal successors, (280), 245 states have internal predecessors, (280), 60 states have call successors, (60), 21 states have call predecessors, (60), 23 states have return successors, (100), 60 states have call predecessors, (100), 59 states have call successors, (100) [2022-07-21 09:33:09,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 440 transitions. [2022-07-21 09:33:09,039 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 440 transitions. Word has length 113 [2022-07-21 09:33:09,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:33:09,039 INFO L495 AbstractCegarLoop]: Abstraction has 327 states and 440 transitions. [2022-07-21 09:33:09,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.736842105263158) internal successors, (71), 14 states have internal predecessors, (71), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2022-07-21 09:33:09,040 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 440 transitions. [2022-07-21 09:33:09,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-07-21 09:33:09,041 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:33:09,041 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-21 09:33:09,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-07-21 09:33:09,041 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:33:09,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:33:09,042 INFO L85 PathProgramCache]: Analyzing trace with hash 886573656, now seen corresponding path program 1 times [2022-07-21 09:33:09,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:33:09,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801706509] [2022-07-21 09:33:09,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:33:09,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:33:09,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:09,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:33:09,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:09,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-21 09:33:09,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:09,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-21 09:33:09,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:09,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:33:09,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:09,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-21 09:33:09,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:09,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-21 09:33:09,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:09,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-21 09:33:09,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:09,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-07-21 09:33:09,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:09,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:33:09,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:09,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-07-21 09:33:09,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:09,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-07-21 09:33:09,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:09,239 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-07-21 09:33:09,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:33:09,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801706509] [2022-07-21 09:33:09,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801706509] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:33:09,240 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:33:09,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-21 09:33:09,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291019151] [2022-07-21 09:33:09,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:33:09,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 09:33:09,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:33:09,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 09:33:09,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-07-21 09:33:09,242 INFO L87 Difference]: Start difference. First operand 327 states and 440 transitions. Second operand has 10 states, 10 states have (on average 6.6) internal successors, (66), 6 states have internal predecessors, (66), 2 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2022-07-21 09:33:09,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:33:09,790 INFO L93 Difference]: Finished difference Result 439 states and 572 transitions. [2022-07-21 09:33:09,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 09:33:09,790 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 6 states have internal predecessors, (66), 2 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) Word has length 114 [2022-07-21 09:33:09,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:33:09,792 INFO L225 Difference]: With dead ends: 439 [2022-07-21 09:33:09,792 INFO L226 Difference]: Without dead ends: 356 [2022-07-21 09:33:09,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-07-21 09:33:09,793 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 77 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 767 SdHoareTripleChecker+Invalid, 801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 09:33:09,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 767 Invalid, 801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-21 09:33:09,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2022-07-21 09:33:09,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 327. [2022-07-21 09:33:09,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 243 states have (on average 1.1522633744855968) internal successors, (280), 245 states have internal predecessors, (280), 60 states have call successors, (60), 21 states have call predecessors, (60), 23 states have return successors, (100), 60 states have call predecessors, (100), 59 states have call successors, (100) [2022-07-21 09:33:09,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 440 transitions. [2022-07-21 09:33:09,831 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 440 transitions. Word has length 114 [2022-07-21 09:33:09,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:33:09,832 INFO L495 AbstractCegarLoop]: Abstraction has 327 states and 440 transitions. [2022-07-21 09:33:09,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 6 states have internal predecessors, (66), 2 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2022-07-21 09:33:09,832 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 440 transitions. [2022-07-21 09:33:09,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-07-21 09:33:09,833 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:33:09,834 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:33:09,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-07-21 09:33:09,834 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:33:09,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:33:09,834 INFO L85 PathProgramCache]: Analyzing trace with hash 2002003192, now seen corresponding path program 1 times [2022-07-21 09:33:09,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:33:09,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78421690] [2022-07-21 09:33:09,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:33:09,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:33:09,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:09,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:33:09,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:09,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-21 09:33:09,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:10,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-21 09:33:10,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:10,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:33:10,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:10,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-21 09:33:10,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:10,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-21 09:33:10,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:10,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-21 09:33:10,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:10,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-07-21 09:33:10,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:10,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:33:10,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:10,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-21 09:33:10,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:10,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-21 09:33:10,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:10,246 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-21 09:33:10,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:33:10,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78421690] [2022-07-21 09:33:10,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78421690] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:33:10,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133470154] [2022-07-21 09:33:10,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:33:10,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:33:10,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:33:10,248 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:33:10,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-21 09:33:10,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:10,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 2711 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-21 09:33:10,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:33:11,121 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 45 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:33:11,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:33:11,338 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-07-21 09:33:11,431 INFO L356 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-07-21 09:33:11,431 INFO L390 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 31 treesize of output 26 [2022-07-21 09:33:11,462 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-21 09:33:11,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133470154] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:33:11,463 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:33:11,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 11] total 25 [2022-07-21 09:33:11,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748186418] [2022-07-21 09:33:11,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:33:11,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-21 09:33:11,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:33:11,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-21 09:33:11,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2022-07-21 09:33:11,465 INFO L87 Difference]: Start difference. First operand 327 states and 440 transitions. Second operand has 25 states, 25 states have (on average 6.2) internal successors, (155), 20 states have internal predecessors, (155), 7 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (21), 5 states have call predecessors, (21), 7 states have call successors, (21) [2022-07-21 09:33:13,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:33:13,201 INFO L93 Difference]: Finished difference Result 543 states and 707 transitions. [2022-07-21 09:33:13,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-21 09:33:13,202 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 6.2) internal successors, (155), 20 states have internal predecessors, (155), 7 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (21), 5 states have call predecessors, (21), 7 states have call successors, (21) Word has length 116 [2022-07-21 09:33:13,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:33:13,203 INFO L225 Difference]: With dead ends: 543 [2022-07-21 09:33:13,204 INFO L226 Difference]: Without dead ends: 339 [2022-07-21 09:33:13,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 247 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=288, Invalid=1272, Unknown=0, NotChecked=0, Total=1560 [2022-07-21 09:33:13,206 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 235 mSDsluCounter, 1111 mSDsCounter, 0 mSdLazyCounter, 1641 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 1319 SdHoareTripleChecker+Invalid, 2204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 496 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-21 09:33:13,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 1319 Invalid, 2204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1641 Invalid, 0 Unknown, 496 Unchecked, 1.2s Time] [2022-07-21 09:33:13,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-07-21 09:33:13,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 325. [2022-07-21 09:33:13,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 243 states have (on average 1.1440329218106995) internal successors, (278), 246 states have internal predecessors, (278), 58 states have call successors, (58), 20 states have call predecessors, (58), 23 states have return successors, (95), 58 states have call predecessors, (95), 57 states have call successors, (95) [2022-07-21 09:33:13,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 431 transitions. [2022-07-21 09:33:13,245 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 431 transitions. Word has length 116 [2022-07-21 09:33:13,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:33:13,246 INFO L495 AbstractCegarLoop]: Abstraction has 325 states and 431 transitions. [2022-07-21 09:33:13,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.2) internal successors, (155), 20 states have internal predecessors, (155), 7 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (21), 5 states have call predecessors, (21), 7 states have call successors, (21) [2022-07-21 09:33:13,246 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 431 transitions. [2022-07-21 09:33:13,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-07-21 09:33:13,247 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:33:13,248 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:33:13,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-21 09:33:13,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:33:13,471 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:33:13,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:33:13,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1849063430, now seen corresponding path program 1 times [2022-07-21 09:33:13,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:33:13,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267450418] [2022-07-21 09:33:13,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:33:13,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:33:13,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:13,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:33:13,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:13,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-21 09:33:13,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:13,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-21 09:33:13,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:13,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:33:13,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:13,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-21 09:33:13,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:13,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-21 09:33:13,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:13,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-21 09:33:13,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:13,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-07-21 09:33:13,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:14,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:33:14,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:14,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-21 09:33:14,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:14,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-21 09:33:14,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:14,193 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:33:14,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:33:14,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267450418] [2022-07-21 09:33:14,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267450418] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:33:14,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135044277] [2022-07-21 09:33:14,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:33:14,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:33:14,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:33:14,195 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:33:14,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-21 09:33:14,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:14,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 2716 conjuncts, 57 conjunts are in the unsatisfiable core [2022-07-21 09:33:14,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:33:14,601 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 [2022-07-21 09:33:14,811 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-21 09:33:14,812 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 17 treesize of output 21 [2022-07-21 09:33:15,229 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-21 09:33:15,229 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 17 treesize of output 21 [2022-07-21 09:33:15,453 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 09:33:15,453 INFO L390 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 11 treesize of output 11 [2022-07-21 09:33:15,542 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1468 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_aws_add_size_checked_#in~r#1.base| v_ArrVal_1468))) is different from true [2022-07-21 09:33:15,552 INFO L390 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 17 treesize of output 19 [2022-07-21 09:33:24,096 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 5 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:33:24,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:33:24,361 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1471 (Array Int Int))) (let ((.cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_aws_byte_buf_reserve_relative_~#requested_capacity~0#1.base| v_ArrVal_1471) |c_ULTIMATE.start_aws_byte_buf_reserve_relative_harness_~#buf~3#1.base|) |c_ULTIMATE.start_aws_byte_buf_reserve_relative_harness_~#buf~3#1.offset|))) (<= .cse0 (+ 18446744073709551615 (* (div (+ (- 1) .cse0) 18446744073709551616) 18446744073709551616))))) is different from false [2022-07-21 09:33:24,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135044277] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:33:24,362 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 09:33:24,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 21] total 44 [2022-07-21 09:33:24,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767821856] [2022-07-21 09:33:24,363 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 09:33:24,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-21 09:33:24,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:33:24,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-21 09:33:24,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1894, Unknown=5, NotChecked=178, Total=2256 [2022-07-21 09:33:24,365 INFO L87 Difference]: Start difference. First operand 325 states and 431 transitions. Second operand has 44 states, 42 states have (on average 4.119047619047619) internal successors, (173), 39 states have internal predecessors, (173), 15 states have call successors, (22), 10 states have call predecessors, (22), 12 states have return successors, (21), 12 states have call predecessors, (21), 14 states have call successors, (21) [2022-07-21 09:33:34,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:33:34,977 INFO L93 Difference]: Finished difference Result 572 states and 777 transitions. [2022-07-21 09:33:34,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-07-21 09:33:34,978 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 42 states have (on average 4.119047619047619) internal successors, (173), 39 states have internal predecessors, (173), 15 states have call successors, (22), 10 states have call predecessors, (22), 12 states have return successors, (21), 12 states have call predecessors, (21), 14 states have call successors, (21) Word has length 116 [2022-07-21 09:33:34,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:33:34,981 INFO L225 Difference]: With dead ends: 572 [2022-07-21 09:33:34,981 INFO L226 Difference]: Without dead ends: 475 [2022-07-21 09:33:34,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 158 SyntacticMatches, 13 SemanticMatches, 91 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2499 ImplicationChecksByTransitivity, 17.7s TimeCoverageRelationStatistics Valid=952, Invalid=7205, Unknown=41, NotChecked=358, Total=8556 [2022-07-21 09:33:34,984 INFO L413 NwaCegarLoop]: 254 mSDtfsCounter, 631 mSDsluCounter, 2224 mSDsCounter, 0 mSdLazyCounter, 2878 mSolverCounterSat, 437 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 640 SdHoareTripleChecker+Valid, 2478 SdHoareTripleChecker+Invalid, 5354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 437 IncrementalHoareTripleChecker+Valid, 2878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2039 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-21 09:33:34,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [640 Valid, 2478 Invalid, 5354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [437 Valid, 2878 Invalid, 0 Unknown, 2039 Unchecked, 2.2s Time] [2022-07-21 09:33:34,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2022-07-21 09:33:35,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 409. [2022-07-21 09:33:35,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 306 states have (on average 1.1405228758169934) internal successors, (349), 310 states have internal predecessors, (349), 74 states have call successors, (74), 24 states have call predecessors, (74), 28 states have return successors, (137), 74 states have call predecessors, (137), 73 states have call successors, (137) [2022-07-21 09:33:35,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 560 transitions. [2022-07-21 09:33:35,037 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 560 transitions. Word has length 116 [2022-07-21 09:33:35,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:33:35,038 INFO L495 AbstractCegarLoop]: Abstraction has 409 states and 560 transitions. [2022-07-21 09:33:35,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 42 states have (on average 4.119047619047619) internal successors, (173), 39 states have internal predecessors, (173), 15 states have call successors, (22), 10 states have call predecessors, (22), 12 states have return successors, (21), 12 states have call predecessors, (21), 14 states have call successors, (21) [2022-07-21 09:33:35,038 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 560 transitions. [2022-07-21 09:33:35,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-07-21 09:33:35,040 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:33:35,040 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:33:35,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-21 09:33:35,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:33:35,254 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:33:35,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:33:35,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1166040188, now seen corresponding path program 1 times [2022-07-21 09:33:35,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:33:35,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110873793] [2022-07-21 09:33:35,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:33:35,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:33:35,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:35,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:33:35,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:35,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-21 09:33:35,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:35,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-21 09:33:35,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:35,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:33:35,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:35,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-21 09:33:35,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:35,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-21 09:33:35,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:35,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-21 09:33:35,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:35,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-07-21 09:33:35,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:35,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:33:35,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:35,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-21 09:33:35,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:35,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-21 09:33:35,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:35,915 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-21 09:33:35,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:33:35,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110873793] [2022-07-21 09:33:35,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110873793] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:33:35,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:33:35,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-07-21 09:33:35,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687010524] [2022-07-21 09:33:35,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:33:35,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 09:33:35,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:33:35,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 09:33:35,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2022-07-21 09:33:35,918 INFO L87 Difference]: Start difference. First operand 409 states and 560 transitions. Second operand has 18 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 15 states have internal predecessors, (63), 7 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2022-07-21 09:33:37,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:33:37,576 INFO L93 Difference]: Finished difference Result 580 states and 811 transitions. [2022-07-21 09:33:37,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-21 09:33:37,576 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 15 states have internal predecessors, (63), 7 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) Word has length 116 [2022-07-21 09:33:37,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:33:37,579 INFO L225 Difference]: With dead ends: 580 [2022-07-21 09:33:37,579 INFO L226 Difference]: Without dead ends: 477 [2022-07-21 09:33:37,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=170, Invalid=886, Unknown=0, NotChecked=0, Total=1056 [2022-07-21 09:33:37,580 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 343 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 1791 mSolverCounterSat, 279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 2070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 1791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-21 09:33:37,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [350 Valid, 595 Invalid, 2070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 1791 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-21 09:33:37,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2022-07-21 09:33:37,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 399. [2022-07-21 09:33:37,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 300 states have (on average 1.1333333333333333) internal successors, (340), 304 states have internal predecessors, (340), 71 states have call successors, (71), 23 states have call predecessors, (71), 27 states have return successors, (134), 71 states have call predecessors, (134), 70 states have call successors, (134) [2022-07-21 09:33:37,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 545 transitions. [2022-07-21 09:33:37,662 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 545 transitions. Word has length 116 [2022-07-21 09:33:37,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:33:37,663 INFO L495 AbstractCegarLoop]: Abstraction has 399 states and 545 transitions. [2022-07-21 09:33:37,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 15 states have internal predecessors, (63), 7 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2022-07-21 09:33:37,663 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 545 transitions. [2022-07-21 09:33:37,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-07-21 09:33:37,665 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:33:37,665 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:33:37,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-07-21 09:33:37,665 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:33:37,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:33:37,666 INFO L85 PathProgramCache]: Analyzing trace with hash -828439065, now seen corresponding path program 1 times [2022-07-21 09:33:37,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:33:37,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236129247] [2022-07-21 09:33:37,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:33:37,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:33:37,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:37,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:33:37,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:37,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-21 09:33:37,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:37,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-21 09:33:37,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:37,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:33:37,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:37,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-21 09:33:37,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:37,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-21 09:33:37,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:37,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-21 09:33:37,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:37,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-07-21 09:33:37,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:37,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:33:37,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:37,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-07-21 09:33:37,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:37,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-07-21 09:33:37,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:37,909 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-07-21 09:33:37,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:33:37,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236129247] [2022-07-21 09:33:37,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236129247] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:33:37,911 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:33:37,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-21 09:33:37,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535205305] [2022-07-21 09:33:37,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:33:37,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 09:33:37,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:33:37,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 09:33:37,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-07-21 09:33:37,913 INFO L87 Difference]: Start difference. First operand 399 states and 545 transitions. Second operand has 10 states, 9 states have (on average 7.222222222222222) internal successors, (65), 6 states have internal predecessors, (65), 2 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2022-07-21 09:33:38,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:33:38,472 INFO L93 Difference]: Finished difference Result 418 states and 568 transitions. [2022-07-21 09:33:38,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 09:33:38,473 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 7.222222222222222) internal successors, (65), 6 states have internal predecessors, (65), 2 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) Word has length 120 [2022-07-21 09:33:38,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:33:38,474 INFO L225 Difference]: With dead ends: 418 [2022-07-21 09:33:38,474 INFO L226 Difference]: Without dead ends: 416 [2022-07-21 09:33:38,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-07-21 09:33:38,475 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 78 mSDsluCounter, 675 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 854 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 09:33:38,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 854 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 750 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 09:33:38,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2022-07-21 09:33:38,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 406. [2022-07-21 09:33:38,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 303 states have (on average 1.132013201320132) internal successors, (343), 307 states have internal predecessors, (343), 74 states have call successors, (74), 24 states have call predecessors, (74), 28 states have return successors, (137), 74 states have call predecessors, (137), 73 states have call successors, (137) [2022-07-21 09:33:38,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 554 transitions. [2022-07-21 09:33:38,533 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 554 transitions. Word has length 120 [2022-07-21 09:33:38,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:33:38,533 INFO L495 AbstractCegarLoop]: Abstraction has 406 states and 554 transitions. [2022-07-21 09:33:38,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 7.222222222222222) internal successors, (65), 6 states have internal predecessors, (65), 2 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2022-07-21 09:33:38,534 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 554 transitions. [2022-07-21 09:33:38,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-07-21 09:33:38,535 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:33:38,536 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 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] [2022-07-21 09:33:38,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-07-21 09:33:38,536 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:33:38,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:33:38,536 INFO L85 PathProgramCache]: Analyzing trace with hash 19637997, now seen corresponding path program 1 times [2022-07-21 09:33:38,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:33:38,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341266363] [2022-07-21 09:33:38,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:33:38,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:33:38,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:38,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:33:38,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:38,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-21 09:33:38,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:38,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-21 09:33:38,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:38,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:33:38,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:38,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-21 09:33:38,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:39,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-21 09:33:39,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:39,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-21 09:33:39,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:39,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-07-21 09:33:39,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:39,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:33:39,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:39,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-07-21 09:33:39,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:39,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-07-21 09:33:39,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:39,316 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 26 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-21 09:33:39,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:33:39,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341266363] [2022-07-21 09:33:39,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341266363] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:33:39,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054553845] [2022-07-21 09:33:39,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:33:39,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:33:39,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:33:39,320 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:33:39,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-21 09:33:39,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:39,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 2718 conjuncts, 84 conjunts are in the unsatisfiable core [2022-07-21 09:33:39,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:33:39,754 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 [2022-07-21 09:33:40,010 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-21 09:33:40,010 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 17 treesize of output 21 [2022-07-21 09:33:40,021 INFO L390 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 [2022-07-21 09:33:40,497 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-21 09:33:40,497 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 17 treesize of output 21 [2022-07-21 09:33:40,788 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 09:33:40,789 INFO L390 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 11 treesize of output 11 [2022-07-21 09:33:40,884 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1656 (Array Int Int))) (= (store |c_old(#memory_int)| |c_aws_add_size_checked_#in~r#1.base| v_ArrVal_1656) |c_#memory_int|)) is different from true [2022-07-21 09:33:40,894 INFO L390 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 17 treesize of output 19 [2022-07-21 09:33:49,484 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 14 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:33:49,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:33:49,796 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1659 (Array Int Int))) (not (= 0 (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_aws_byte_buf_reserve_relative_~#requested_capacity~0#1.base| v_ArrVal_1659) |c_ULTIMATE.start_aws_byte_buf_reserve_relative_~buffer#1.base|) (+ |c_ULTIMATE.start_aws_byte_buf_reserve_relative_~buffer#1.offset| 16)) 18446744073709551616)))) is different from false [2022-07-21 09:33:49,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054553845] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:33:49,797 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 09:33:49,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 46 [2022-07-21 09:33:49,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134671324] [2022-07-21 09:33:49,798 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 09:33:49,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-21 09:33:49,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:33:49,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-21 09:33:49,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=2271, Unknown=4, NotChecked=194, Total=2652 [2022-07-21 09:33:49,800 INFO L87 Difference]: Start difference. First operand 406 states and 554 transitions. Second operand has 46 states, 43 states have (on average 4.232558139534884) internal successors, (182), 41 states have internal predecessors, (182), 17 states have call successors, (22), 9 states have call predecessors, (22), 12 states have return successors, (21), 14 states have call predecessors, (21), 16 states have call successors, (21) [2022-07-21 09:33:59,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:33:59,668 INFO L93 Difference]: Finished difference Result 844 states and 1260 transitions. [2022-07-21 09:33:59,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-07-21 09:33:59,669 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 43 states have (on average 4.232558139534884) internal successors, (182), 41 states have internal predecessors, (182), 17 states have call successors, (22), 9 states have call predecessors, (22), 12 states have return successors, (21), 14 states have call predecessors, (21), 16 states have call successors, (21) Word has length 124 [2022-07-21 09:33:59,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:33:59,672 INFO L225 Difference]: With dead ends: 844 [2022-07-21 09:33:59,672 INFO L226 Difference]: Without dead ends: 631 [2022-07-21 09:33:59,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 164 SyntacticMatches, 12 SemanticMatches, 105 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 3129 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=855, Invalid=10040, Unknown=33, NotChecked=414, Total=11342 [2022-07-21 09:33:59,675 INFO L413 NwaCegarLoop]: 317 mSDtfsCounter, 409 mSDsluCounter, 3350 mSDsCounter, 0 mSdLazyCounter, 4329 mSolverCounterSat, 338 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 3667 SdHoareTripleChecker+Invalid, 7341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 338 IncrementalHoareTripleChecker+Valid, 4329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2674 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-07-21 09:33:59,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [459 Valid, 3667 Invalid, 7341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [338 Valid, 4329 Invalid, 0 Unknown, 2674 Unchecked, 3.1s Time] [2022-07-21 09:33:59,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2022-07-21 09:33:59,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 472. [2022-07-21 09:33:59,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 352 states have (on average 1.1619318181818181) internal successors, (409), 360 states have internal predecessors, (409), 90 states have call successors, (90), 25 states have call predecessors, (90), 29 states have return successors, (171), 86 states have call predecessors, (171), 89 states have call successors, (171) [2022-07-21 09:33:59,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 670 transitions. [2022-07-21 09:33:59,747 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 670 transitions. Word has length 124 [2022-07-21 09:33:59,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:33:59,748 INFO L495 AbstractCegarLoop]: Abstraction has 472 states and 670 transitions. [2022-07-21 09:33:59,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 43 states have (on average 4.232558139534884) internal successors, (182), 41 states have internal predecessors, (182), 17 states have call successors, (22), 9 states have call predecessors, (22), 12 states have return successors, (21), 14 states have call predecessors, (21), 16 states have call successors, (21) [2022-07-21 09:33:59,748 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 670 transitions. [2022-07-21 09:33:59,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-07-21 09:33:59,750 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:33:59,750 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:33:59,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-21 09:33:59,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:33:59,963 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:33:59,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:33:59,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1260225681, now seen corresponding path program 2 times [2022-07-21 09:33:59,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:33:59,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675888036] [2022-07-21 09:33:59,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:33:59,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:34:00,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:00,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:34:00,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:00,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-21 09:34:00,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:00,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-21 09:34:00,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:00,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:34:00,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:00,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-21 09:34:00,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:00,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-21 09:34:00,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:00,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-21 09:34:00,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:00,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-07-21 09:34:00,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:00,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:34:00,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:00,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-07-21 09:34:00,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:00,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-07-21 09:34:00,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:00,350 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 48 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-21 09:34:00,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:34:00,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675888036] [2022-07-21 09:34:00,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675888036] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:34:00,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386997701] [2022-07-21 09:34:00,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:34:00,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:34:00,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:34:00,356 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:34:00,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-21 09:34:01,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:34:01,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:34:01,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 2713 conjuncts, 85 conjunts are in the unsatisfiable core [2022-07-21 09:34:01,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:34:01,330 INFO L390 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 [2022-07-21 09:34:01,779 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1744 (Array Int Int))) (= (store |c_old(#memory_int)| |c_aws_add_size_checked_#in~r#1.base| v_ArrVal_1744) |c_#memory_int|)) is different from true [2022-07-21 09:34:01,796 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 09:34:01,797 INFO L390 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 17 treesize of output 23 [2022-07-21 09:34:07,764 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 18 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:34:07,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:34:10,478 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1747 (Array Int Int)) (|ULTIMATE.start_aws_byte_buf_reserve_relative_~#requested_capacity~0#1.base| Int)) (let ((.cse0 (select (store |c_#memory_int| |ULTIMATE.start_aws_byte_buf_reserve_relative_~#requested_capacity~0#1.base| v_ArrVal_1747) |c_ULTIMATE.start_aws_byte_buf_reserve_relative_~buffer#1.base|))) (let ((.cse1 (mod (select .cse0 (+ |c_ULTIMATE.start_aws_byte_buf_reserve_relative_~buffer#1.offset| 16)) 18446744073709551616))) (or (= (mod (select .cse0 |c_ULTIMATE.start_aws_byte_buf_reserve_relative_~buffer#1.offset|) 18446744073709551616) 0) (not (<= .cse1 0)) (not (<= (mod (select v_ArrVal_1747 |c_ULTIMATE.start_aws_byte_buf_reserve_relative_~#requested_capacity~0#1.offset|) 18446744073709551616) .cse1)))))) is different from false [2022-07-21 09:34:10,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386997701] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:34:10,480 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 09:34:10,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 26] total 36 [2022-07-21 09:34:10,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536097688] [2022-07-21 09:34:10,480 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 09:34:10,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-21 09:34:10,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:34:10,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-21 09:34:10,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1798, Unknown=7, NotChecked=174, Total=2162 [2022-07-21 09:34:10,481 INFO L87 Difference]: Start difference. First operand 472 states and 670 transitions. Second operand has 36 states, 33 states have (on average 4.818181818181818) internal successors, (159), 31 states have internal predecessors, (159), 12 states have call successors, (22), 7 states have call predecessors, (22), 7 states have return successors, (21), 9 states have call predecessors, (21), 11 states have call successors, (21) [2022-07-21 09:34:48,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:34:48,276 INFO L93 Difference]: Finished difference Result 705 states and 981 transitions. [2022-07-21 09:34:48,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-07-21 09:34:48,277 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 33 states have (on average 4.818181818181818) internal successors, (159), 31 states have internal predecessors, (159), 12 states have call successors, (22), 7 states have call predecessors, (22), 7 states have return successors, (21), 9 states have call predecessors, (21), 11 states have call successors, (21) Word has length 124 [2022-07-21 09:34:48,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:34:48,279 INFO L225 Difference]: With dead ends: 705 [2022-07-21 09:34:48,279 INFO L226 Difference]: Without dead ends: 574 [2022-07-21 09:34:48,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 153 SyntacticMatches, 7 SemanticMatches, 80 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1645 ImplicationChecksByTransitivity, 44.6s TimeCoverageRelationStatistics Valid=724, Invalid=5560, Unknown=44, NotChecked=314, Total=6642 [2022-07-21 09:34:48,285 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 250 mSDsluCounter, 1292 mSDsCounter, 0 mSdLazyCounter, 2557 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 1473 SdHoareTripleChecker+Invalid, 4154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 2557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1526 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-21 09:34:48,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 1473 Invalid, 4154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 2557 Invalid, 0 Unknown, 1526 Unchecked, 1.5s Time] [2022-07-21 09:34:48,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2022-07-21 09:34:48,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 497. [2022-07-21 09:34:48,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 376 states have (on average 1.1569148936170213) internal successors, (435), 382 states have internal predecessors, (435), 90 states have call successors, (90), 28 states have call predecessors, (90), 30 states have return successors, (165), 86 states have call predecessors, (165), 89 states have call successors, (165) [2022-07-21 09:34:48,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 690 transitions. [2022-07-21 09:34:48,352 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 690 transitions. Word has length 124 [2022-07-21 09:34:48,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:34:48,352 INFO L495 AbstractCegarLoop]: Abstraction has 497 states and 690 transitions. [2022-07-21 09:34:48,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 33 states have (on average 4.818181818181818) internal successors, (159), 31 states have internal predecessors, (159), 12 states have call successors, (22), 7 states have call predecessors, (22), 7 states have return successors, (21), 9 states have call predecessors, (21), 11 states have call successors, (21) [2022-07-21 09:34:48,353 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 690 transitions. [2022-07-21 09:34:48,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-07-21 09:34:48,355 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:34:48,355 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:34:48,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-21 09:34:48,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-07-21 09:34:48,571 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:34:48,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:34:48,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1188228275, now seen corresponding path program 1 times [2022-07-21 09:34:48,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:34:48,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906912634] [2022-07-21 09:34:48,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:34:48,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:34:48,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:48,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:34:48,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:48,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-21 09:34:48,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:48,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-21 09:34:48,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:48,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:34:48,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:48,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-21 09:34:48,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:48,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-21 09:34:48,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:48,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-21 09:34:48,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:48,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-07-21 09:34:48,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:48,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:34:48,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:48,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-07-21 09:34:48,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:48,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-07-21 09:34:48,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:48,937 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 48 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-21 09:34:48,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:34:48,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906912634] [2022-07-21 09:34:48,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906912634] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:34:48,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449232210] [2022-07-21 09:34:48,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:34:48,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:34:48,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:34:48,939 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:34:48,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-21 09:34:49,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:49,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 2715 conjuncts, 106 conjunts are in the unsatisfiable core [2022-07-21 09:34:49,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:34:49,404 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 [2022-07-21 09:34:49,614 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 09:34:49,614 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-07-21 09:34:49,637 INFO L390 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 [2022-07-21 09:34:49,824 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-21 09:34:49,825 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 17 treesize of output 21 [2022-07-21 09:34:50,328 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-21 09:34:50,328 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-07-21 09:34:50,405 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1835 (Array Int Int))) (= (store |c_old(#memory_int)| |c_aws_add_size_checked_#in~r#1.base| v_ArrVal_1835) |c_#memory_int|)) is different from true [2022-07-21 09:34:50,412 INFO L390 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 24 treesize of output 24 [2022-07-21 09:34:55,064 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 30 proven. 53 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:34:55,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:34:55,477 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1838 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_aws_byte_buf_reserve_relative_~#requested_capacity~0#1.base| v_ArrVal_1838) |c_ULTIMATE.start_aws_byte_buf_reserve_relative_~buffer#1.base|))) (<= (mod (select .cse0 |c_ULTIMATE.start_aws_byte_buf_reserve_relative_~buffer#1.offset|) 18446744073709551616) (mod (select .cse0 (+ |c_ULTIMATE.start_aws_byte_buf_reserve_relative_~buffer#1.offset| 16)) 18446744073709551616)))) is different from false [2022-07-21 09:34:55,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449232210] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:34:55,479 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 09:34:55,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 28] total 38 [2022-07-21 09:34:55,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631066121] [2022-07-21 09:34:55,479 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 09:34:55,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-21 09:34:55,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:34:55,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-21 09:34:55,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1641, Unknown=6, NotChecked=166, Total=1980 [2022-07-21 09:34:55,480 INFO L87 Difference]: Start difference. First operand 497 states and 690 transitions. Second operand has 38 states, 36 states have (on average 4.805555555555555) internal successors, (173), 34 states have internal predecessors, (173), 11 states have call successors, (23), 9 states have call predecessors, (23), 9 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) [2022-07-21 09:35:03,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:35:03,040 INFO L93 Difference]: Finished difference Result 828 states and 1176 transitions. [2022-07-21 09:35:03,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-07-21 09:35:03,040 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 4.805555555555555) internal successors, (173), 34 states have internal predecessors, (173), 11 states have call successors, (23), 9 states have call predecessors, (23), 9 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) Word has length 124 [2022-07-21 09:35:03,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:35:03,044 INFO L225 Difference]: With dead ends: 828 [2022-07-21 09:35:03,044 INFO L226 Difference]: Without dead ends: 692 [2022-07-21 09:35:03,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 150 SyntacticMatches, 12 SemanticMatches, 66 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1392 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=412, Invalid=3848, Unknown=38, NotChecked=258, Total=4556 [2022-07-21 09:35:03,046 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 253 mSDsluCounter, 1631 mSDsCounter, 0 mSdLazyCounter, 992 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 1847 SdHoareTripleChecker+Invalid, 2241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1131 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-21 09:35:03,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 1847 Invalid, 2241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 992 Invalid, 0 Unknown, 1131 Unchecked, 0.7s Time] [2022-07-21 09:35:03,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2022-07-21 09:35:03,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 612. [2022-07-21 09:35:03,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 463 states have (on average 1.1857451403887689) internal successors, (549), 474 states have internal predecessors, (549), 114 states have call successors, (114), 31 states have call predecessors, (114), 34 states have return successors, (217), 106 states have call predecessors, (217), 113 states have call successors, (217) [2022-07-21 09:35:03,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 880 transitions. [2022-07-21 09:35:03,141 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 880 transitions. Word has length 124 [2022-07-21 09:35:03,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:35:03,141 INFO L495 AbstractCegarLoop]: Abstraction has 612 states and 880 transitions. [2022-07-21 09:35:03,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 4.805555555555555) internal successors, (173), 34 states have internal predecessors, (173), 11 states have call successors, (23), 9 states have call predecessors, (23), 9 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) [2022-07-21 09:35:03,142 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 880 transitions. [2022-07-21 09:35:03,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-07-21 09:35:03,143 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:35:03,144 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 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] [2022-07-21 09:35:03,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-21 09:35:03,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-07-21 09:35:03,351 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:35:03,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:35:03,352 INFO L85 PathProgramCache]: Analyzing trace with hash -947242963, now seen corresponding path program 1 times [2022-07-21 09:35:03,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:35:03,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306772153] [2022-07-21 09:35:03,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:35:03,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:35:03,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:03,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:35:03,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:03,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-21 09:35:03,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:03,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-21 09:35:03,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:03,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:35:03,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:03,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-21 09:35:03,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:03,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-21 09:35:03,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:03,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-21 09:35:03,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:03,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-07-21 09:35:03,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:03,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:35:03,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:03,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-07-21 09:35:03,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:03,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-07-21 09:35:03,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:03,939 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-07-21 09:35:03,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:35:03,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306772153] [2022-07-21 09:35:03,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306772153] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:35:03,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366779271] [2022-07-21 09:35:03,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:35:03,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:35:03,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:35:03,944 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:35:03,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-21 09:35:04,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:04,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 2708 conjuncts, 76 conjunts are in the unsatisfiable core [2022-07-21 09:35:04,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:35:04,487 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-21 09:35:10,749 INFO L390 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 8 treesize of output 4 [2022-07-21 09:35:11,615 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1924 Int)) (= (store |c_old(#memory_$Pointer$.base)| |c_aws_add_size_checked_#in~r#1.base| (store (select |c_old(#memory_$Pointer$.base)| |c_aws_add_size_checked_#in~r#1.base|) |c_aws_add_size_checked_#in~r#1.offset| v_ArrVal_1924)) |c_#memory_$Pointer$.base|)) is different from true [2022-07-21 09:35:11,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:35:11,623 INFO L390 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 20 treesize of output 19 [2022-07-21 09:35:13,837 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 09:35:13,839 INFO L356 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-07-21 09:35:13,839 INFO L390 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 24 treesize of output 1 [2022-07-21 09:35:13,840 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-21 09:35:13,840 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 09:35:13,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366779271] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:35:13,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 09:35:13,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [19] total 32 [2022-07-21 09:35:13,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474270895] [2022-07-21 09:35:13,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:35:13,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-21 09:35:13,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:35:13,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-21 09:35:13,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=829, Unknown=2, NotChecked=58, Total=992 [2022-07-21 09:35:13,842 INFO L87 Difference]: Start difference. First operand 612 states and 880 transitions. Second operand has 17 states, 16 states have (on average 5.3125) internal successors, (85), 15 states have internal predecessors, (85), 8 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (11), 7 states have call predecessors, (11), 8 states have call successors, (11) [2022-07-21 09:35:14,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:35:14,326 INFO L93 Difference]: Finished difference Result 898 states and 1261 transitions. [2022-07-21 09:35:14,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 09:35:14,326 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 5.3125) internal successors, (85), 15 states have internal predecessors, (85), 8 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (11), 7 states have call predecessors, (11), 8 states have call successors, (11) Word has length 124 [2022-07-21 09:35:14,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:35:14,328 INFO L225 Difference]: With dead ends: 898 [2022-07-21 09:35:14,329 INFO L226 Difference]: Without dead ends: 703 [2022-07-21 09:35:14,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 124 SyntacticMatches, 7 SemanticMatches, 36 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=136, Invalid=1198, Unknown=2, NotChecked=70, Total=1406 [2022-07-21 09:35:14,330 INFO L413 NwaCegarLoop]: 288 mSDtfsCounter, 143 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 1035 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 611 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 09:35:14,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 1035 Invalid, 1109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 451 Invalid, 0 Unknown, 611 Unchecked, 0.3s Time] [2022-07-21 09:35:14,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2022-07-21 09:35:14,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 616. [2022-07-21 09:35:14,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 471 states have (on average 1.1719745222929936) internal successors, (552), 484 states have internal predecessors, (552), 108 states have call successors, (108), 31 states have call predecessors, (108), 36 states have return successors, (203), 100 states have call predecessors, (203), 107 states have call successors, (203) [2022-07-21 09:35:14,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 863 transitions. [2022-07-21 09:35:14,422 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 863 transitions. Word has length 124 [2022-07-21 09:35:14,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:35:14,423 INFO L495 AbstractCegarLoop]: Abstraction has 616 states and 863 transitions. [2022-07-21 09:35:14,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 5.3125) internal successors, (85), 15 states have internal predecessors, (85), 8 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (11), 7 states have call predecessors, (11), 8 states have call successors, (11) [2022-07-21 09:35:14,423 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 863 transitions. [2022-07-21 09:35:14,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-07-21 09:35:14,425 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:35:14,425 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:35:14,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-21 09:35:14,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-07-21 09:35:14,639 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:35:14,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:35:14,640 INFO L85 PathProgramCache]: Analyzing trace with hash -164563912, now seen corresponding path program 1 times [2022-07-21 09:35:14,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:35:14,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506653376] [2022-07-21 09:35:14,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:35:14,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:35:14,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:14,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:35:14,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:14,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-21 09:35:14,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:14,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-21 09:35:14,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:14,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:35:14,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:14,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-21 09:35:14,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:14,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-21 09:35:14,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:14,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-21 09:35:14,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:14,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-07-21 09:35:14,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:14,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:35:14,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:14,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-07-21 09:35:14,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:14,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-07-21 09:35:14,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:14,894 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-07-21 09:35:14,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:35:14,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506653376] [2022-07-21 09:35:14,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506653376] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:35:14,894 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:35:14,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-21 09:35:14,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598575833] [2022-07-21 09:35:14,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:35:14,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-21 09:35:14,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:35:14,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-21 09:35:14,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2022-07-21 09:35:14,895 INFO L87 Difference]: Start difference. First operand 616 states and 863 transitions. Second operand has 12 states, 11 states have (on average 6.090909090909091) internal successors, (67), 8 states have internal predecessors, (67), 2 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2022-07-21 09:35:15,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:35:15,528 INFO L93 Difference]: Finished difference Result 640 states and 895 transitions. [2022-07-21 09:35:15,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 09:35:15,529 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 6.090909090909091) internal successors, (67), 8 states have internal predecessors, (67), 2 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) Word has length 126 [2022-07-21 09:35:15,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:35:15,532 INFO L225 Difference]: With dead ends: 640 [2022-07-21 09:35:15,532 INFO L226 Difference]: Without dead ends: 638 [2022-07-21 09:35:15,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-07-21 09:35:15,533 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 140 mSDsluCounter, 831 mSDsCounter, 0 mSdLazyCounter, 866 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 1004 SdHoareTripleChecker+Invalid, 955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 09:35:15,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 1004 Invalid, 955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 866 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 09:35:15,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2022-07-21 09:35:15,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 623. [2022-07-21 09:35:15,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 623 states, 474 states have (on average 1.1708860759493671) internal successors, (555), 487 states have internal predecessors, (555), 111 states have call successors, (111), 32 states have call predecessors, (111), 37 states have return successors, (206), 103 states have call predecessors, (206), 110 states have call successors, (206) [2022-07-21 09:35:15,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 872 transitions. [2022-07-21 09:35:15,622 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 872 transitions. Word has length 126 [2022-07-21 09:35:15,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:35:15,623 INFO L495 AbstractCegarLoop]: Abstraction has 623 states and 872 transitions. [2022-07-21 09:35:15,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 6.090909090909091) internal successors, (67), 8 states have internal predecessors, (67), 2 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2022-07-21 09:35:15,623 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 872 transitions. [2022-07-21 09:35:15,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-07-21 09:35:15,625 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:35:15,625 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:35:15,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-07-21 09:35:15,625 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:35:15,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:35:15,626 INFO L85 PathProgramCache]: Analyzing trace with hash 536500666, now seen corresponding path program 2 times [2022-07-21 09:35:15,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:35:15,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926793377] [2022-07-21 09:35:15,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:35:15,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:35:15,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:15,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:35:15,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:15,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-21 09:35:15,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:15,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-21 09:35:15,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:15,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:35:15,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:15,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-21 09:35:15,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:15,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-21 09:35:15,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:15,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-21 09:35:15,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:15,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-07-21 09:35:15,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:15,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:35:15,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:15,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-07-21 09:35:15,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:15,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-07-21 09:35:15,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:35:16,062 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 52 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-21 09:35:16,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:35:16,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926793377] [2022-07-21 09:35:16,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926793377] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:35:16,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056160420] [2022-07-21 09:35:16,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:35:16,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:35:16,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:35:16,064 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:35:16,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-21 09:35:16,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:35:16,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:35:16,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 2725 conjuncts, 84 conjunts are in the unsatisfiable core [2022-07-21 09:35:16,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:35:16,644 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 [2022-07-21 09:35:16,832 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-21 09:35:16,832 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 17 treesize of output 21 [2022-07-21 09:35:16,863 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 [2022-07-21 09:35:17,090 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 09:35:17,090 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-07-21 09:35:17,284 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 09:35:17,284 INFO L390 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 11 treesize of output 11 [2022-07-21 09:35:17,346 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2060 (Array Int Int))) (= (store |c_old(#memory_$Pointer$.base)| |c_aws_add_size_checked_#in~r#1.base| v_ArrVal_2060) |c_#memory_$Pointer$.base|)) is different from true [2022-07-21 09:35:17,357 INFO L390 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 23 treesize of output 23 [2022-07-21 09:35:29,713 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 14 proven. 56 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-21 09:35:29,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:35:32,399 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2063 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_aws_byte_buf_reserve_relative_~#requested_capacity~0#1.base| v_ArrVal_2063) |c_ULTIMATE.start_aws_byte_buf_reserve_relative_~buffer#1.base|) (+ |c_ULTIMATE.start_aws_byte_buf_reserve_relative_~buffer#1.offset| 8)) 0))) is different from false [2022-07-21 09:35:32,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056160420] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:35:32,400 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 09:35:32,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 26] total 37 [2022-07-21 09:35:32,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957176383] [2022-07-21 09:35:32,401 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 09:35:32,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-21 09:35:32,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:35:32,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-21 09:35:32,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=2017, Unknown=4, NotChecked=182, Total=2352 [2022-07-21 09:35:32,402 INFO L87 Difference]: Start difference. First operand 623 states and 872 transitions. Second operand has 37 states, 35 states have (on average 4.6571428571428575) internal successors, (163), 31 states have internal predecessors, (163), 11 states have call successors, (24), 10 states have call predecessors, (24), 9 states have return successors, (22), 12 states have call predecessors, (22), 9 states have call successors, (22)