./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be16_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b 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_write_be16_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 e59944759baac4a78b3b5460ff6f3a8abaec03123fb9537d86aeca785269fb41 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 17:02:02,041 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 17:02:02,042 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 17:02:02,131 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 17:02:02,132 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 17:02:02,134 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 17:02:02,136 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 17:02:02,138 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 17:02:02,140 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 17:02:02,142 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 17:02:02,142 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 17:02:02,143 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 17:02:02,144 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 17:02:02,147 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 17:02:02,149 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 17:02:02,150 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 17:02:02,153 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 17:02:02,154 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 17:02:02,155 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 17:02:02,157 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 17:02:02,160 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 17:02:02,161 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 17:02:02,162 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 17:02:02,163 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 17:02:02,164 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 17:02:02,166 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 17:02:02,166 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 17:02:02,167 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 17:02:02,168 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 17:02:02,168 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 17:02:02,168 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 17:02:02,169 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 17:02:02,170 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 17:02:02,171 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 17:02:02,171 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 17:02:02,172 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 17:02:02,173 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 17:02:02,173 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 17:02:02,173 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 17:02:02,174 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 17:02:02,174 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 17:02:02,175 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-14 17:02:02,195 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 17:02:02,195 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 17:02:02,196 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 17:02:02,196 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 17:02:02,197 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 17:02:02,197 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 17:02:02,197 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 17:02:02,197 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 17:02:02,197 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 17:02:02,198 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 17:02:02,198 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 17:02:02,198 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 17:02:02,199 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 17:02:02,199 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 17:02:02,199 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 17:02:02,199 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 17:02:02,199 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 17:02:02,199 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 17:02:02,200 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 17:02:02,200 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 17:02:02,200 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 17:02:02,200 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 17:02:02,200 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 17:02:02,200 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 17:02:02,200 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 17:02:02,201 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 17:02:02,201 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 17:02:02,201 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 17:02:02,201 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 17:02:02,201 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 17:02:02,201 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 17:02:02,202 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e59944759baac4a78b3b5460ff6f3a8abaec03123fb9537d86aeca785269fb41 [2021-12-14 17:02:02,403 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 17:02:02,426 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 17:02:02,428 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 17:02:02,429 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 17:02:02,430 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 17:02:02,431 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be16_harness.i [2021-12-14 17:02:02,481 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fd135351/efd702af5461425dadedbe81f4573739/FLAGc9fe91611 [2021-12-14 17:02:03,110 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 17:02:03,110 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be16_harness.i [2021-12-14 17:02:03,140 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fd135351/efd702af5461425dadedbe81f4573739/FLAGc9fe91611 [2021-12-14 17:02:03,472 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fd135351/efd702af5461425dadedbe81f4573739 [2021-12-14 17:02:03,475 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 17:02:03,492 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 17:02:03,493 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 17:02:03,493 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 17:02:03,495 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 17:02:03,496 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:02:03" (1/1) ... [2021-12-14 17:02:03,496 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b410562 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:02:03, skipping insertion in model container [2021-12-14 17:02:03,497 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:02:03" (1/1) ... [2021-12-14 17:02:03,501 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 17:02:03,601 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 17:02:03,852 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_write_be16_harness.i[4497,4510] [2021-12-14 17:02:03,859 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_write_be16_harness.i[4557,4570] [2021-12-14 17:02:04,328 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:02:04,330 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:02:04,331 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:02:04,333 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:02:04,334 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:02:04,349 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:02:04,349 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:02:04,350 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:02:04,351 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:02:04,674 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-14 17:02:04,682 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-14 17:02:04,683 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-14 17:02:04,684 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-14 17:02:04,692 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-14 17:02:04,693 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-14 17:02:04,693 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-14 17:02:04,694 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-14 17:02:04,694 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-14 17:02:04,694 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-14 17:02:04,883 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-14 17:02:04,963 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:02:04,963 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:02:05,072 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 17:02:05,126 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 17:02:05,142 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_write_be16_harness.i[4497,4510] [2021-12-14 17:02:05,144 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_write_be16_harness.i[4557,4570] [2021-12-14 17:02:05,175 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:02:05,176 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:02:05,177 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:02:05,177 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:02:05,177 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:02:05,187 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:02:05,188 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:02:05,189 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:02:05,189 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:02:05,221 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-14 17:02:05,222 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-14 17:02:05,222 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-14 17:02:05,222 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-14 17:02:05,223 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-14 17:02:05,223 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-14 17:02:05,224 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-14 17:02:05,224 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-14 17:02:05,225 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-14 17:02:05,225 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-14 17:02:05,245 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-14 17:02:05,293 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:02:05,294 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:02:05,316 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 17:02:05,483 INFO L208 MainTranslator]: Completed translation [2021-12-14 17:02:05,483 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:02:05 WrapperNode [2021-12-14 17:02:05,483 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 17:02:05,484 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 17:02:05,484 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 17:02:05,484 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 17:02:05,489 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:02:05" (1/1) ... [2021-12-14 17:02:05,549 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:02:05" (1/1) ... [2021-12-14 17:02:05,621 INFO L137 Inliner]: procedures = 691, calls = 2619, calls flagged for inlining = 62, calls inlined = 10, statements flattened = 866 [2021-12-14 17:02:05,621 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 17:02:05,622 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 17:02:05,622 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 17:02:05,622 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 17:02:05,628 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:02:05" (1/1) ... [2021-12-14 17:02:05,628 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:02:05" (1/1) ... [2021-12-14 17:02:05,639 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:02:05" (1/1) ... [2021-12-14 17:02:05,640 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:02:05" (1/1) ... [2021-12-14 17:02:05,670 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:02:05" (1/1) ... [2021-12-14 17:02:05,686 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:02:05" (1/1) ... [2021-12-14 17:02:05,693 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:02:05" (1/1) ... [2021-12-14 17:02:05,706 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 17:02:05,710 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 17:02:05,710 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 17:02:05,710 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 17:02:05,711 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:02:05" (1/1) ... [2021-12-14 17:02:05,716 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 17:02:05,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:02:05,756 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) [2021-12-14 17:02:05,787 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 [2021-12-14 17:02:05,798 INFO L130 BoogieDeclarations]: Found specification of procedure htons [2021-12-14 17:02:05,799 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2021-12-14 17:02:05,799 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2021-12-14 17:02:05,799 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 17:02:05,799 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-12-14 17:02:05,799 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-12-14 17:02:05,799 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-14 17:02:05,800 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-14 17:02:05,800 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-14 17:02:05,800 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-14 17:02:05,801 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 17:02:05,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-14 17:02:05,801 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_impl [2021-12-14 17:02:05,802 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_impl [2021-12-14 17:02:05,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 17:02:05,802 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 17:02:05,802 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-12-14 17:02:05,802 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-12-14 17:02:05,802 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-12-14 17:02:05,802 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-12-14 17:02:05,803 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-14 17:02:05,803 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-14 17:02:05,803 INFO L130 BoogieDeclarations]: Found specification of procedure my_memcpy [2021-12-14 17:02:05,803 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memcpy [2021-12-14 17:02:05,803 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-14 17:02:05,804 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-14 17:02:05,804 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_write [2021-12-14 17:02:05,804 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_write [2021-12-14 17:02:05,804 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-14 17:02:05,805 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-12-14 17:02:05,805 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-12-14 17:02:05,805 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-14 17:02:05,805 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 17:02:06,089 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 17:02:06,104 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 17:02:06,880 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 17:02:06,887 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 17:02:06,887 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-14 17:02:06,889 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:02:06 BoogieIcfgContainer [2021-12-14 17:02:06,889 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 17:02:06,891 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 17:02:06,891 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 17:02:06,894 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 17:02:06,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 05:02:03" (1/3) ... [2021-12-14 17:02:06,894 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2599aa21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:02:06, skipping insertion in model container [2021-12-14 17:02:06,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:02:05" (2/3) ... [2021-12-14 17:02:06,895 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2599aa21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:02:06, skipping insertion in model container [2021-12-14 17:02:06,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:02:06" (3/3) ... [2021-12-14 17:02:06,896 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_write_be16_harness.i [2021-12-14 17:02:06,899 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 17:02:06,900 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 17:02:06,927 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 17:02:06,937 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-14 17:02:06,938 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 17:02:06,953 INFO L276 IsEmpty]: Start isEmpty. Operand has 132 states, 86 states have (on average 1.2325581395348837) internal successors, (106), 87 states have internal predecessors, (106), 34 states have call successors, (34), 10 states have call predecessors, (34), 10 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-12-14 17:02:06,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-14 17:02:06,962 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:02:06,962 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:02:06,963 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:02:06,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:02:06,966 INFO L85 PathProgramCache]: Analyzing trace with hash 239952465, now seen corresponding path program 1 times [2021-12-14 17:02:06,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:02:06,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975549099] [2021-12-14 17:02:06,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:02:06,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:02:07,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:07,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:02:07,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:07,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:02:07,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:07,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:02:07,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:07,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:02:07,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:07,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 17:02:07,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:07,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-14 17:02:07,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:07,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 17:02:07,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:07,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 17:02:07,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:07,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-14 17:02:07,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:07,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-14 17:02:07,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:07,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-14 17:02:07,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:07,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-14 17:02:07,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:07,471 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-14 17:02:07,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:02:07,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975549099] [2021-12-14 17:02:07,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975549099] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:02:07,472 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:02:07,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 17:02:07,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085393890] [2021-12-14 17:02:07,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:02:07,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 17:02:07,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:02:07,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 17:02:07,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 17:02:07,512 INFO L87 Difference]: Start difference. First operand has 132 states, 86 states have (on average 1.2325581395348837) internal successors, (106), 87 states have internal predecessors, (106), 34 states have call successors, (34), 10 states have call predecessors, (34), 10 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-14 17:02:07,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:02:07,656 INFO L93 Difference]: Finished difference Result 260 states and 369 transitions. [2021-12-14 17:02:07,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 17:02:07,658 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) Word has length 86 [2021-12-14 17:02:07,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:02:07,664 INFO L225 Difference]: With dead ends: 260 [2021-12-14 17:02:07,664 INFO L226 Difference]: Without dead ends: 127 [2021-12-14 17:02:07,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 17:02:07,669 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 62 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:02:07,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 191 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 17:02:07,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-12-14 17:02:07,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2021-12-14 17:02:07,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 82 states have (on average 1.2073170731707317) internal successors, (99), 83 states have internal predecessors, (99), 34 states have call successors, (34), 10 states have call predecessors, (34), 10 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2021-12-14 17:02:07,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 166 transitions. [2021-12-14 17:02:07,698 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 166 transitions. Word has length 86 [2021-12-14 17:02:07,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:02:07,698 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 166 transitions. [2021-12-14 17:02:07,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-14 17:02:07,699 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 166 transitions. [2021-12-14 17:02:07,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-14 17:02:07,701 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:02:07,701 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:02:07,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 17:02:07,702 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:02:07,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:02:07,702 INFO L85 PathProgramCache]: Analyzing trace with hash 89659733, now seen corresponding path program 1 times [2021-12-14 17:02:07,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:02:07,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134925985] [2021-12-14 17:02:07,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:02:07,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:02:07,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:07,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:02:07,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:07,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:02:07,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:07,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:02:07,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:07,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:02:07,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:07,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 17:02:07,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:07,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-14 17:02:07,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:07,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 17:02:07,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:07,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 17:02:07,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:07,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-14 17:02:07,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:07,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-14 17:02:07,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:07,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-14 17:02:07,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:07,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-14 17:02:07,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:07,936 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-14 17:02:07,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:02:07,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134925985] [2021-12-14 17:02:07,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134925985] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:02:07,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737962367] [2021-12-14 17:02:07,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:02:07,938 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:02:07,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:02:07,939 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) [2021-12-14 17:02:07,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 17:02:08,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:08,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 2620 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-14 17:02:08,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:02:08,524 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-14 17:02:08,524 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:02:08,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737962367] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:02:08,525 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:02:08,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-12-14 17:02:08,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395611191] [2021-12-14 17:02:08,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:02:08,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 17:02:08,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:02:08,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 17:02:08,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-14 17:02:08,527 INFO L87 Difference]: Start difference. First operand 127 states and 166 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-14 17:02:08,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:02:08,644 INFO L93 Difference]: Finished difference Result 232 states and 311 transitions. [2021-12-14 17:02:08,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 17:02:08,645 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 86 [2021-12-14 17:02:08,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:02:08,647 INFO L225 Difference]: With dead ends: 232 [2021-12-14 17:02:08,647 INFO L226 Difference]: Without dead ends: 130 [2021-12-14 17:02:08,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-12-14 17:02:08,649 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 195 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:02:08,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 473 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 17:02:08,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-12-14 17:02:08,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2021-12-14 17:02:08,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 84 states have (on average 1.2023809523809523) internal successors, (101), 86 states have internal predecessors, (101), 34 states have call successors, (34), 10 states have call predecessors, (34), 11 states have return successors, (37), 33 states have call predecessors, (37), 33 states have call successors, (37) [2021-12-14 17:02:08,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 172 transitions. [2021-12-14 17:02:08,659 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 172 transitions. Word has length 86 [2021-12-14 17:02:08,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:02:08,660 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 172 transitions. [2021-12-14 17:02:08,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-14 17:02:08,660 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 172 transitions. [2021-12-14 17:02:08,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-14 17:02:08,662 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:02:08,662 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:02:08,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-14 17:02:08,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:02:08,882 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:02:08,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:02:08,883 INFO L85 PathProgramCache]: Analyzing trace with hash -171255798, now seen corresponding path program 1 times [2021-12-14 17:02:08,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:02:08,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142096693] [2021-12-14 17:02:08,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:02:08,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:02:08,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:09,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:02:09,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:09,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:02:09,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:09,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:02:09,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:09,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:02:09,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:09,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 17:02:09,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:09,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 17:02:09,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:09,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 17:02:09,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:09,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 17:02:09,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:09,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-14 17:02:09,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:09,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-14 17:02:09,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:09,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-14 17:02:09,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:09,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-14 17:02:09,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:09,187 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-14 17:02:09,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:02:09,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142096693] [2021-12-14 17:02:09,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142096693] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:02:09,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844951746] [2021-12-14 17:02:09,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:02:09,190 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:02:09,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:02:09,198 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) [2021-12-14 17:02:09,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 17:02:09,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:09,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 2637 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-14 17:02:09,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:02:09,872 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-14 17:02:09,872 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:02:09,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844951746] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:02:09,873 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:02:09,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-12-14 17:02:09,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696029619] [2021-12-14 17:02:09,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:02:09,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 17:02:09,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:02:09,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 17:02:09,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-12-14 17:02:09,874 INFO L87 Difference]: Start difference. First operand 130 states and 172 transitions. Second operand has 7 states, 6 states have (on average 8.333333333333334) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-14 17:02:10,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:02:10,006 INFO L93 Difference]: Finished difference Result 227 states and 302 transitions. [2021-12-14 17:02:10,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 17:02:10,007 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 8.333333333333334) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) Word has length 92 [2021-12-14 17:02:10,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:02:10,008 INFO L225 Difference]: With dead ends: 227 [2021-12-14 17:02:10,008 INFO L226 Difference]: Without dead ends: 130 [2021-12-14 17:02:10,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-12-14 17:02:10,009 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 212 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:02:10,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 591 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 17:02:10,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-12-14 17:02:10,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2021-12-14 17:02:10,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 84 states have (on average 1.2023809523809523) internal successors, (101), 86 states have internal predecessors, (101), 34 states have call successors, (34), 10 states have call predecessors, (34), 11 states have return successors, (36), 33 states have call predecessors, (36), 33 states have call successors, (36) [2021-12-14 17:02:10,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 171 transitions. [2021-12-14 17:02:10,018 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 171 transitions. Word has length 92 [2021-12-14 17:02:10,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:02:10,018 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 171 transitions. [2021-12-14 17:02:10,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 8.333333333333334) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-14 17:02:10,018 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 171 transitions. [2021-12-14 17:02:10,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-14 17:02:10,020 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:02:10,020 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2021-12-14 17:02:10,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-14 17:02:10,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-12-14 17:02:10,240 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:02:10,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:02:10,241 INFO L85 PathProgramCache]: Analyzing trace with hash -358018689, now seen corresponding path program 2 times [2021-12-14 17:02:10,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:02:10,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149556806] [2021-12-14 17:02:10,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:02:10,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:02:10,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:10,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:02:10,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:10,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:02:10,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:10,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:02:10,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:10,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:02:10,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:10,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 17:02:10,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:10,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 17:02:10,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:10,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 17:02:10,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:10,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-14 17:02:10,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:10,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-14 17:02:10,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:10,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-14 17:02:10,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:10,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-14 17:02:10,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:10,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-14 17:02:10,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:10,455 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-14 17:02:10,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:02:10,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149556806] [2021-12-14 17:02:10,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149556806] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:02:10,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161993490] [2021-12-14 17:02:10,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 17:02:10,456 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:02:10,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:02:10,457 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) [2021-12-14 17:02:10,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 17:02:10,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 17:02:10,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 17:02:10,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 2654 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-14 17:02:10,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:02:11,055 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-14 17:02:11,056 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:02:11,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161993490] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:02:11,056 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:02:11,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 16 [2021-12-14 17:02:11,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129873539] [2021-12-14 17:02:11,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:02:11,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 17:02:11,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:02:11,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 17:02:11,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-12-14 17:02:11,058 INFO L87 Difference]: Start difference. First operand 130 states and 171 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-14 17:02:11,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:02:11,245 INFO L93 Difference]: Finished difference Result 221 states and 292 transitions. [2021-12-14 17:02:11,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 17:02:11,245 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 98 [2021-12-14 17:02:11,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:02:11,246 INFO L225 Difference]: With dead ends: 221 [2021-12-14 17:02:11,246 INFO L226 Difference]: Without dead ends: 127 [2021-12-14 17:02:11,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-12-14 17:02:11,248 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 218 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 675 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:02:11,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 675 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 17:02:11,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-12-14 17:02:11,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2021-12-14 17:02:11,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 82 states have (on average 1.1951219512195121) internal successors, (98), 83 states have internal predecessors, (98), 34 states have call successors, (34), 10 states have call predecessors, (34), 10 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2021-12-14 17:02:11,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 165 transitions. [2021-12-14 17:02:11,254 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 165 transitions. Word has length 98 [2021-12-14 17:02:11,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:02:11,255 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 165 transitions. [2021-12-14 17:02:11,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-14 17:02:11,255 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 165 transitions. [2021-12-14 17:02:11,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-14 17:02:11,256 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:02:11,256 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:02:11,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-14 17:02:11,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:02:11,477 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:02:11,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:02:11,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1323939499, now seen corresponding path program 1 times [2021-12-14 17:02:11,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:02:11,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518775037] [2021-12-14 17:02:11,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:02:11,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:02:11,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:11,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:02:11,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:11,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:02:11,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:11,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:02:11,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:11,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:02:11,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:11,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 17:02:11,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:11,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 17:02:11,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:11,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 17:02:11,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:11,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-14 17:02:11,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:11,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-14 17:02:11,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:11,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-14 17:02:11,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:11,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-14 17:02:11,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:11,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-14 17:02:11,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:11,990 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-12-14 17:02:11,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:02:11,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518775037] [2021-12-14 17:02:11,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518775037] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:02:11,990 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:02:11,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-14 17:02:11,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418317380] [2021-12-14 17:02:11,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:02:11,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 17:02:11,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:02:11,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 17:02:11,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-14 17:02:11,992 INFO L87 Difference]: Start difference. First operand 127 states and 165 transitions. Second operand has 9 states, 8 states have (on average 5.375) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2021-12-14 17:02:12,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:02:12,309 INFO L93 Difference]: Finished difference Result 139 states and 182 transitions. [2021-12-14 17:02:12,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 17:02:12,310 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.375) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) Word has length 110 [2021-12-14 17:02:12,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:02:12,311 INFO L225 Difference]: With dead ends: 139 [2021-12-14 17:02:12,311 INFO L226 Difference]: Without dead ends: 137 [2021-12-14 17:02:12,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-12-14 17:02:12,311 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 88 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 707 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 17:02:12,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 707 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 17:02:12,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-12-14 17:02:12,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2021-12-14 17:02:12,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 88 states have (on average 1.1818181818181819) internal successors, (104), 90 states have internal predecessors, (104), 35 states have call successors, (35), 11 states have call predecessors, (35), 12 states have return successors, (40), 34 states have call predecessors, (40), 34 states have call successors, (40) [2021-12-14 17:02:12,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 179 transitions. [2021-12-14 17:02:12,318 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 179 transitions. Word has length 110 [2021-12-14 17:02:12,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:02:12,318 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 179 transitions. [2021-12-14 17:02:12,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.375) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2021-12-14 17:02:12,319 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 179 transitions. [2021-12-14 17:02:12,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-14 17:02:12,320 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:02:12,320 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:02:12,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 17:02:12,321 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:02:12,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:02:12,322 INFO L85 PathProgramCache]: Analyzing trace with hash 2136545501, now seen corresponding path program 1 times [2021-12-14 17:02:12,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:02:12,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141951133] [2021-12-14 17:02:12,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:02:12,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:02:12,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:12,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:02:12,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:12,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:02:12,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:12,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:02:12,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:12,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:02:12,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:12,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 17:02:12,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:12,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 17:02:12,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:12,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 17:02:12,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:12,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-14 17:02:12,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:12,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-14 17:02:12,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:12,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-14 17:02:12,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:12,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-14 17:02:12,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:12,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-14 17:02:12,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:12,643 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 42 proven. 6 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-14 17:02:12,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:02:12,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141951133] [2021-12-14 17:02:12,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141951133] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:02:12,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558191531] [2021-12-14 17:02:12,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:02:12,644 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:02:12,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:02:12,645 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) [2021-12-14 17:02:12,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 17:02:13,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:13,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 2700 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-14 17:02:13,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:02:17,356 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-12-14 17:02:17,356 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:02:17,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558191531] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:02:17,356 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:02:17,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 13 [2021-12-14 17:02:17,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355567748] [2021-12-14 17:02:17,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:02:17,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 17:02:17,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:02:17,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 17:02:17,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=126, Unknown=2, NotChecked=0, Total=156 [2021-12-14 17:02:17,357 INFO L87 Difference]: Start difference. First operand 136 states and 179 transitions. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2021-12-14 17:02:17,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:02:17,501 INFO L93 Difference]: Finished difference Result 263 states and 361 transitions. [2021-12-14 17:02:17,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:02:17,502 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) Word has length 114 [2021-12-14 17:02:17,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:02:17,503 INFO L225 Difference]: With dead ends: 263 [2021-12-14 17:02:17,503 INFO L226 Difference]: Without dead ends: 152 [2021-12-14 17:02:17,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=34, Invalid=146, Unknown=2, NotChecked=0, Total=182 [2021-12-14 17:02:17,504 INFO L933 BasicCegarLoop]: 170 mSDtfsCounter, 23 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:02:17,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 565 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 84 Invalid, 0 Unknown, 44 Unchecked, 0.1s Time] [2021-12-14 17:02:17,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-12-14 17:02:17,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 141. [2021-12-14 17:02:17,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 93 states have (on average 1.1935483870967742) internal successors, (111), 95 states have internal predecessors, (111), 35 states have call successors, (35), 11 states have call predecessors, (35), 12 states have return successors, (40), 34 states have call predecessors, (40), 34 states have call successors, (40) [2021-12-14 17:02:17,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 186 transitions. [2021-12-14 17:02:17,511 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 186 transitions. Word has length 114 [2021-12-14 17:02:17,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:02:17,512 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 186 transitions. [2021-12-14 17:02:17,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2021-12-14 17:02:17,512 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 186 transitions. [2021-12-14 17:02:17,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-14 17:02:17,513 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:02:17,513 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:02:17,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-14 17:02:17,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:02:17,732 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:02:17,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:02:17,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1900256357, now seen corresponding path program 1 times [2021-12-14 17:02:17,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:02:17,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838135282] [2021-12-14 17:02:17,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:02:17,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:02:17,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:18,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:02:18,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:18,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:02:18,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:18,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:02:18,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:18,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:02:18,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:18,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 17:02:18,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:18,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 17:02:18,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:18,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 17:02:18,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:18,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-14 17:02:18,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:18,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-14 17:02:18,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:18,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-14 17:02:18,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:18,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-14 17:02:18,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:18,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-14 17:02:18,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:18,182 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-12-14 17:02:18,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:02:18,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838135282] [2021-12-14 17:02:18,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838135282] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:02:18,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354330044] [2021-12-14 17:02:18,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:02:18,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:02:18,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:02:18,200 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) [2021-12-14 17:02:18,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-14 17:02:18,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:18,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 2695 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-14 17:02:18,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:02:18,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-14 17:02:19,084 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-14 17:02:19,084 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:02:19,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354330044] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:02:19,084 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:02:19,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [11] total 21 [2021-12-14 17:02:19,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246321488] [2021-12-14 17:02:19,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:02:19,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-14 17:02:19,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:02:19,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-14 17:02:19,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-12-14 17:02:19,085 INFO L87 Difference]: Start difference. First operand 141 states and 186 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 10 states have internal predecessors, (57), 5 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-12-14 17:02:19,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:02:19,127 INFO L93 Difference]: Finished difference Result 280 states and 371 transitions. [2021-12-14 17:02:19,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-14 17:02:19,128 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 10 states have internal predecessors, (57), 5 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 114 [2021-12-14 17:02:19,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:02:19,129 INFO L225 Difference]: With dead ends: 280 [2021-12-14 17:02:19,129 INFO L226 Difference]: Without dead ends: 160 [2021-12-14 17:02:19,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-12-14 17:02:19,130 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 32 mSDsluCounter, 735 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 895 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 17:02:19,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 895 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 29 Invalid, 0 Unknown, 64 Unchecked, 0.0s Time] [2021-12-14 17:02:19,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-12-14 17:02:19,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2021-12-14 17:02:19,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 111 states have (on average 1.2072072072072073) internal successors, (134), 113 states have internal predecessors, (134), 35 states have call successors, (35), 12 states have call predecessors, (35), 13 states have return successors, (40), 34 states have call predecessors, (40), 34 states have call successors, (40) [2021-12-14 17:02:19,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 209 transitions. [2021-12-14 17:02:19,136 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 209 transitions. Word has length 114 [2021-12-14 17:02:19,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:02:19,137 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 209 transitions. [2021-12-14 17:02:19,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 10 states have internal predecessors, (57), 5 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-12-14 17:02:19,137 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 209 transitions. [2021-12-14 17:02:19,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-14 17:02:19,138 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:02:19,138 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:02:19,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-14 17:02:19,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:02:19,358 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:02:19,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:02:19,358 INFO L85 PathProgramCache]: Analyzing trace with hash -333498407, now seen corresponding path program 1 times [2021-12-14 17:02:19,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:02:19,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710933742] [2021-12-14 17:02:19,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:02:19,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:02:19,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:19,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:02:19,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:19,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:02:19,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:19,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:02:19,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:19,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:02:19,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:19,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 17:02:19,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:19,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 17:02:19,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:19,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 17:02:19,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:19,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-14 17:02:19,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:19,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-14 17:02:19,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:19,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-14 17:02:19,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:19,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-14 17:02:19,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:19,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-14 17:02:19,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:19,584 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-12-14 17:02:19,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:02:19,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710933742] [2021-12-14 17:02:19,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710933742] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:02:19,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139227810] [2021-12-14 17:02:19,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:02:19,585 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:02:19,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:02:19,598 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) [2021-12-14 17:02:19,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-14 17:02:19,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:19,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 2690 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 17:02:19,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:02:20,132 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-12-14 17:02:20,132 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:02:20,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139227810] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:02:20,133 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:02:20,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2021-12-14 17:02:20,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593838158] [2021-12-14 17:02:20,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:02:20,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 17:02:20,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:02:20,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 17:02:20,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:02:20,134 INFO L87 Difference]: Start difference. First operand 160 states and 209 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-14 17:02:20,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:02:20,153 INFO L93 Difference]: Finished difference Result 289 states and 389 transitions. [2021-12-14 17:02:20,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:02:20,154 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 114 [2021-12-14 17:02:20,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:02:20,155 INFO L225 Difference]: With dead ends: 289 [2021-12-14 17:02:20,155 INFO L226 Difference]: Without dead ends: 169 [2021-12-14 17:02:20,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-14 17:02:20,156 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 20 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 487 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 [2021-12-14 17:02:20,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 487 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 17:02:20,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-12-14 17:02:20,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 152. [2021-12-14 17:02:20,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 104 states have (on average 1.2019230769230769) internal successors, (125), 105 states have internal predecessors, (125), 35 states have call successors, (35), 12 states have call predecessors, (35), 12 states have return successors, (39), 34 states have call predecessors, (39), 34 states have call successors, (39) [2021-12-14 17:02:20,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 199 transitions. [2021-12-14 17:02:20,162 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 199 transitions. Word has length 114 [2021-12-14 17:02:20,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:02:20,162 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 199 transitions. [2021-12-14 17:02:20,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-14 17:02:20,162 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 199 transitions. [2021-12-14 17:02:20,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-14 17:02:20,163 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:02:20,163 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-12-14 17:02:20,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-14 17:02:20,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:02:20,377 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:02:20,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:02:20,378 INFO L85 PathProgramCache]: Analyzing trace with hash -320167147, now seen corresponding path program 2 times [2021-12-14 17:02:20,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:02:20,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784805740] [2021-12-14 17:02:20,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:02:20,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:02:20,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:20,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:02:20,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:20,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:02:20,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:20,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:02:20,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:20,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:02:20,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:20,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 17:02:20,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:20,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 17:02:20,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:20,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-14 17:02:20,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:20,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-14 17:02:20,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:20,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-14 17:02:20,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:20,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-14 17:02:20,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:20,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-14 17:02:20,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:20,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-14 17:02:20,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:20,776 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-14 17:02:20,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:02:20,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784805740] [2021-12-14 17:02:20,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784805740] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:02:20,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289683663] [2021-12-14 17:02:20,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 17:02:20,777 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:02:20,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:02:20,792 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) [2021-12-14 17:02:20,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-14 17:02:21,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 17:02:21,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 17:02:21,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 2702 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-14 17:02:21,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:02:21,427 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-12-14 17:02:21,427 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:02:21,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289683663] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:02:21,427 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:02:21,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 11 [2021-12-14 17:02:21,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109387410] [2021-12-14 17:02:21,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:02:21,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 17:02:21,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:02:21,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 17:02:21,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-14 17:02:21,429 INFO L87 Difference]: Start difference. First operand 152 states and 199 transitions. Second operand has 9 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-14 17:02:21,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:02:21,535 INFO L93 Difference]: Finished difference Result 277 states and 369 transitions. [2021-12-14 17:02:21,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 17:02:21,535 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 118 [2021-12-14 17:02:21,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:02:21,536 INFO L225 Difference]: With dead ends: 277 [2021-12-14 17:02:21,536 INFO L226 Difference]: Without dead ends: 157 [2021-12-14 17:02:21,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-12-14 17:02:21,537 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 12 mSDsluCounter, 1050 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1206 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:02:21,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1206 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 17:02:21,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-12-14 17:02:21,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2021-12-14 17:02:21,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 108 states have (on average 1.1944444444444444) internal successors, (129), 110 states have internal predecessors, (129), 35 states have call successors, (35), 12 states have call predecessors, (35), 13 states have return successors, (44), 34 states have call predecessors, (44), 34 states have call successors, (44) [2021-12-14 17:02:21,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 208 transitions. [2021-12-14 17:02:21,546 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 208 transitions. Word has length 118 [2021-12-14 17:02:21,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:02:21,546 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 208 transitions. [2021-12-14 17:02:21,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-14 17:02:21,546 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 208 transitions. [2021-12-14 17:02:21,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-14 17:02:21,548 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:02:21,548 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:02:21,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-14 17:02:21,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:02:21,769 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:02:21,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:02:21,770 INFO L85 PathProgramCache]: Analyzing trace with hash 363409424, now seen corresponding path program 1 times [2021-12-14 17:02:21,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:02:21,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879210946] [2021-12-14 17:02:21,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:02:21,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:02:21,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:21,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:02:21,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:21,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:02:21,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:21,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:02:21,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:21,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:02:21,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:21,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 17:02:21,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:21,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 17:02:21,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:21,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 17:02:21,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:21,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 17:02:21,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:21,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-14 17:02:21,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:21,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-14 17:02:21,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:21,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-14 17:02:21,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:21,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-14 17:02:21,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:21,898 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-12-14 17:02:21,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:02:21,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879210946] [2021-12-14 17:02:21,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879210946] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:02:21,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431565918] [2021-12-14 17:02:21,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:02:21,898 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:02:21,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:02:21,899 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) [2021-12-14 17:02:21,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-14 17:02:22,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:22,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 2707 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 17:02:22,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:02:22,445 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-12-14 17:02:22,446 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:02:22,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431565918] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:02:22,446 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:02:22,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2021-12-14 17:02:22,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912512964] [2021-12-14 17:02:22,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:02:22,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 17:02:22,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:02:22,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 17:02:22,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:02:22,447 INFO L87 Difference]: Start difference. First operand 157 states and 208 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-14 17:02:22,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:02:22,467 INFO L93 Difference]: Finished difference Result 287 states and 390 transitions. [2021-12-14 17:02:22,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:02:22,468 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 120 [2021-12-14 17:02:22,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:02:22,469 INFO L225 Difference]: With dead ends: 287 [2021-12-14 17:02:22,469 INFO L226 Difference]: Without dead ends: 160 [2021-12-14 17:02:22,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-14 17:02:22,470 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 9 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 480 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 [2021-12-14 17:02:22,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 480 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 17:02:22,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-12-14 17:02:22,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 157. [2021-12-14 17:02:22,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 108 states have (on average 1.1759259259259258) internal successors, (127), 110 states have internal predecessors, (127), 35 states have call successors, (35), 12 states have call predecessors, (35), 13 states have return successors, (44), 34 states have call predecessors, (44), 34 states have call successors, (44) [2021-12-14 17:02:22,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 206 transitions. [2021-12-14 17:02:22,475 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 206 transitions. Word has length 120 [2021-12-14 17:02:22,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:02:22,476 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 206 transitions. [2021-12-14 17:02:22,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-14 17:02:22,476 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 206 transitions. [2021-12-14 17:02:22,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-14 17:02:22,477 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:02:22,477 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:02:22,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-14 17:02:22,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-14 17:02:22,699 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:02:22,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:02:22,700 INFO L85 PathProgramCache]: Analyzing trace with hash 363989836, now seen corresponding path program 1 times [2021-12-14 17:02:22,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:02:22,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285647775] [2021-12-14 17:02:22,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:02:22,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:02:22,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:22,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:02:22,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:22,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:02:22,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:22,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:02:22,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:22,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:02:22,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:22,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 17:02:22,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:22,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 17:02:22,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:22,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 17:02:22,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:22,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 17:02:22,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:22,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-14 17:02:22,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:22,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-14 17:02:22,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:22,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-14 17:02:22,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:22,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-14 17:02:22,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:22,938 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-14 17:02:22,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:02:22,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285647775] [2021-12-14 17:02:22,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285647775] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:02:22,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563108493] [2021-12-14 17:02:22,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:02:22,939 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:02:22,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:02:22,956 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) [2021-12-14 17:02:23,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-14 17:02:23,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:23,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 2709 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 17:02:23,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:02:23,561 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-12-14 17:02:23,561 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:02:23,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563108493] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:02:23,562 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:02:23,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2021-12-14 17:02:23,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615865529] [2021-12-14 17:02:23,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:02:23,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 17:02:23,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:02:23,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 17:02:23,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:02:23,564 INFO L87 Difference]: Start difference. First operand 157 states and 206 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-14 17:02:23,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:02:23,584 INFO L93 Difference]: Finished difference Result 293 states and 402 transitions. [2021-12-14 17:02:23,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:02:23,584 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 120 [2021-12-14 17:02:23,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:02:23,585 INFO L225 Difference]: With dead ends: 293 [2021-12-14 17:02:23,586 INFO L226 Difference]: Without dead ends: 166 [2021-12-14 17:02:23,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-14 17:02:23,587 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 34 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 478 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 [2021-12-14 17:02:23,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 478 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 17:02:23,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-12-14 17:02:23,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 153. [2021-12-14 17:02:23,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 104 states have (on average 1.1538461538461537) internal successors, (120), 106 states have internal predecessors, (120), 35 states have call successors, (35), 12 states have call predecessors, (35), 13 states have return successors, (44), 34 states have call predecessors, (44), 34 states have call successors, (44) [2021-12-14 17:02:23,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 199 transitions. [2021-12-14 17:02:23,596 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 199 transitions. Word has length 120 [2021-12-14 17:02:23,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:02:23,596 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 199 transitions. [2021-12-14 17:02:23,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-14 17:02:23,596 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 199 transitions. [2021-12-14 17:02:23,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-14 17:02:23,597 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:02:23,598 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:02:23,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-14 17:02:23,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:02:23,817 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:02:23,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:02:23,817 INFO L85 PathProgramCache]: Analyzing trace with hash -630703862, now seen corresponding path program 1 times [2021-12-14 17:02:23,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:02:23,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546624190] [2021-12-14 17:02:23,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:02:23,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:02:23,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:24,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:02:24,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:24,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:02:24,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:24,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:02:24,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:24,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:02:24,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:24,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 17:02:24,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:24,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 17:02:24,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:24,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 17:02:24,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:24,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 17:02:24,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:24,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-14 17:02:24,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:24,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-14 17:02:24,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:24,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-14 17:02:24,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:24,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-14 17:02:24,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:24,261 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-14 17:02:24,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:02:24,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546624190] [2021-12-14 17:02:24,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546624190] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:02:24,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626230340] [2021-12-14 17:02:24,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:02:24,262 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:02:24,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:02:24,263 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) [2021-12-14 17:02:24,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-14 17:02:24,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:24,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 2704 conjuncts, 90 conjunts are in the unsatisfiable core [2021-12-14 17:02:24,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:02:24,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-14 17:02:25,217 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 17:02:25,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2021-12-14 17:02:25,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 7 treesize of output 3 [2021-12-14 17:02:25,237 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 17:02:25,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 25 [2021-12-14 17:02:25,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 6 [2021-12-14 17:02:25,360 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 17:02:25,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 29 [2021-12-14 17:02:25,372 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 17:02:25,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 26 [2021-12-14 17:02:26,470 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 63 proven. 50 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-14 17:02:26,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 17:02:27,294 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-12-14 17:02:27,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2021-12-14 17:02:27,491 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 44 proven. 10 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-12-14 17:02:27,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626230340] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 17:02:27,492 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 17:02:27,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 30, 13] total 49 [2021-12-14 17:02:27,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760023011] [2021-12-14 17:02:27,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 17:02:27,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-14 17:02:27,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:02:27,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-14 17:02:27,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=2152, Unknown=0, NotChecked=0, Total=2352 [2021-12-14 17:02:27,494 INFO L87 Difference]: Start difference. First operand 153 states and 199 transitions. Second operand has 49 states, 46 states have (on average 3.3260869565217392) internal successors, (153), 44 states have internal predecessors, (153), 13 states have call successors, (32), 8 states have call predecessors, (32), 10 states have return successors, (27), 10 states have call predecessors, (27), 12 states have call successors, (27) [2021-12-14 17:02:31,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:02:31,497 INFO L93 Difference]: Finished difference Result 439 states and 612 transitions. [2021-12-14 17:02:31,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-12-14 17:02:31,498 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 46 states have (on average 3.3260869565217392) internal successors, (153), 44 states have internal predecessors, (153), 13 states have call successors, (32), 8 states have call predecessors, (32), 10 states have return successors, (27), 10 states have call predecessors, (27), 12 states have call successors, (27) Word has length 120 [2021-12-14 17:02:31,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:02:31,502 INFO L225 Difference]: With dead ends: 439 [2021-12-14 17:02:31,503 INFO L226 Difference]: Without dead ends: 326 [2021-12-14 17:02:31,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 224 SyntacticMatches, 5 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2430 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=683, Invalid=7873, Unknown=0, NotChecked=0, Total=8556 [2021-12-14 17:02:31,506 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 374 mSDsluCounter, 2241 mSDsCounter, 0 mSdLazyCounter, 3502 mSolverCounterSat, 383 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 2420 SdHoareTripleChecker+Invalid, 4642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 383 IncrementalHoareTripleChecker+Valid, 3502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 757 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-14 17:02:31,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [393 Valid, 2420 Invalid, 4642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [383 Valid, 3502 Invalid, 0 Unknown, 757 Unchecked, 2.4s Time] [2021-12-14 17:02:31,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-12-14 17:02:31,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 236. [2021-12-14 17:02:31,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 159 states have (on average 1.1383647798742138) internal successors, (181), 161 states have internal predecessors, (181), 58 states have call successors, (58), 15 states have call predecessors, (58), 18 states have return successors, (78), 59 states have call predecessors, (78), 57 states have call successors, (78) [2021-12-14 17:02:31,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 317 transitions. [2021-12-14 17:02:31,536 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 317 transitions. Word has length 120 [2021-12-14 17:02:31,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:02:31,536 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 317 transitions. [2021-12-14 17:02:31,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 46 states have (on average 3.3260869565217392) internal successors, (153), 44 states have internal predecessors, (153), 13 states have call successors, (32), 8 states have call predecessors, (32), 10 states have return successors, (27), 10 states have call predecessors, (27), 12 states have call successors, (27) [2021-12-14 17:02:31,537 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 317 transitions. [2021-12-14 17:02:31,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-14 17:02:31,538 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:02:31,538 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 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] [2021-12-14 17:02:31,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-14 17:02:31,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-14 17:02:31,759 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:02:31,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:02:31,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1691712822, now seen corresponding path program 1 times [2021-12-14 17:02:31,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:02:31,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3441304] [2021-12-14 17:02:31,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:02:31,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:02:31,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:31,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:02:31,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:31,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:02:31,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:31,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:02:31,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:31,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:02:31,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:31,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 17:02:31,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:31,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 17:02:31,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:31,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 17:02:31,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:31,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 17:02:31,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:32,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-14 17:02:32,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:32,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-14 17:02:32,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:32,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-14 17:02:32,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:32,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-14 17:02:32,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:32,185 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 44 proven. 8 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-14 17:02:32,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:02:32,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3441304] [2021-12-14 17:02:32,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3441304] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:02:32,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526874098] [2021-12-14 17:02:32,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:02:32,186 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:02:32,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:02:32,200 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) [2021-12-14 17:02:32,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-14 17:02:32,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:32,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 2704 conjuncts, 59 conjunts are in the unsatisfiable core [2021-12-14 17:02:32,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:02:32,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-14 17:02:32,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:02:32,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2021-12-14 17:02:33,168 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-14 17:02:33,168 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:02:33,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526874098] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:02:33,169 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:02:33,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 24 [2021-12-14 17:02:33,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733699032] [2021-12-14 17:02:33,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:02:33,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-14 17:02:33,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:02:33,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-14 17:02:33,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-12-14 17:02:33,170 INFO L87 Difference]: Start difference. First operand 236 states and 317 transitions. Second operand has 13 states, 12 states have (on average 6.416666666666667) internal successors, (77), 12 states have internal predecessors, (77), 6 states have call successors, (14), 3 states have call predecessors, (14), 5 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-12-14 17:02:33,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:02:33,309 INFO L93 Difference]: Finished difference Result 443 states and 590 transitions. [2021-12-14 17:02:33,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 17:02:33,310 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 6.416666666666667) internal successors, (77), 12 states have internal predecessors, (77), 6 states have call successors, (14), 3 states have call predecessors, (14), 5 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 120 [2021-12-14 17:02:33,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:02:33,311 INFO L225 Difference]: With dead ends: 443 [2021-12-14 17:02:33,311 INFO L226 Difference]: Without dead ends: 303 [2021-12-14 17:02:33,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 129 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-12-14 17:02:33,312 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 47 mSDsluCounter, 1258 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 1456 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:02:33,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 1456 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 102 Invalid, 0 Unknown, 165 Unchecked, 0.1s Time] [2021-12-14 17:02:33,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-12-14 17:02:33,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 260. [2021-12-14 17:02:33,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 182 states have (on average 1.1483516483516483) internal successors, (209), 184 states have internal predecessors, (209), 58 states have call successors, (58), 16 states have call predecessors, (58), 19 states have return successors, (77), 59 states have call predecessors, (77), 57 states have call successors, (77) [2021-12-14 17:02:33,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 344 transitions. [2021-12-14 17:02:33,325 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 344 transitions. Word has length 120 [2021-12-14 17:02:33,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:02:33,326 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 344 transitions. [2021-12-14 17:02:33,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 6.416666666666667) internal successors, (77), 12 states have internal predecessors, (77), 6 states have call successors, (14), 3 states have call predecessors, (14), 5 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-12-14 17:02:33,326 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 344 transitions. [2021-12-14 17:02:33,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-14 17:02:33,328 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:02:33,328 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 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] [2021-12-14 17:02:33,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-14 17:02:33,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-14 17:02:33,540 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:02:33,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:02:33,540 INFO L85 PathProgramCache]: Analyzing trace with hash -124954872, now seen corresponding path program 1 times [2021-12-14 17:02:33,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:02:33,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285834247] [2021-12-14 17:02:33,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:02:33,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:02:33,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:33,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:02:33,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:33,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:02:33,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:33,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:02:33,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:33,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:02:33,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:33,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 17:02:33,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:33,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 17:02:33,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:33,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 17:02:33,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:33,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 17:02:33,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:33,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-14 17:02:33,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:33,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-14 17:02:33,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:33,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-14 17:02:33,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:33,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-14 17:02:33,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:33,903 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 44 proven. 8 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-14 17:02:33,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:02:33,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285834247] [2021-12-14 17:02:33,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285834247] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:02:33,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024399127] [2021-12-14 17:02:33,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:02:33,904 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:02:33,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:02:33,905 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) [2021-12-14 17:02:33,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-14 17:02:34,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:34,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 2709 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-14 17:02:34,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:02:34,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-14 17:02:35,139 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-14 17:02:35,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-12-14 17:02:35,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-12-14 17:02:35,276 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-14 17:02:35,277 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:02:35,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024399127] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:02:35,277 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:02:35,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [12] total 25 [2021-12-14 17:02:35,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232798433] [2021-12-14 17:02:35,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:02:35,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-14 17:02:35,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:02:35,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-14 17:02:35,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-12-14 17:02:35,278 INFO L87 Difference]: Start difference. First operand 260 states and 344 transitions. Second operand has 15 states, 15 states have (on average 4.466666666666667) internal successors, (67), 11 states have internal predecessors, (67), 6 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-12-14 17:02:35,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:02:35,725 INFO L93 Difference]: Finished difference Result 431 states and 580 transitions. [2021-12-14 17:02:35,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-14 17:02:35,726 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.466666666666667) internal successors, (67), 11 states have internal predecessors, (67), 6 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 120 [2021-12-14 17:02:35,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:02:35,727 INFO L225 Difference]: With dead ends: 431 [2021-12-14 17:02:35,727 INFO L226 Difference]: Without dead ends: 297 [2021-12-14 17:02:35,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2021-12-14 17:02:35,729 INFO L933 BasicCegarLoop]: 171 mSDtfsCounter, 282 mSDsluCounter, 749 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 920 SdHoareTripleChecker+Invalid, 1193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 555 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 17:02:35,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 920 Invalid, 1193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 528 Invalid, 0 Unknown, 555 Unchecked, 0.4s Time] [2021-12-14 17:02:35,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-12-14 17:02:35,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 264. [2021-12-14 17:02:35,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 185 states have (on average 1.1405405405405404) internal successors, (211), 187 states have internal predecessors, (211), 58 states have call successors, (58), 17 states have call predecessors, (58), 20 states have return successors, (77), 59 states have call predecessors, (77), 57 states have call successors, (77) [2021-12-14 17:02:35,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 346 transitions. [2021-12-14 17:02:35,741 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 346 transitions. Word has length 120 [2021-12-14 17:02:35,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:02:35,741 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 346 transitions. [2021-12-14 17:02:35,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.466666666666667) internal successors, (67), 11 states have internal predecessors, (67), 6 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-12-14 17:02:35,741 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 346 transitions. [2021-12-14 17:02:35,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-14 17:02:35,743 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:02:35,743 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 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] [2021-12-14 17:02:35,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-14 17:02:35,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-14 17:02:35,963 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:02:35,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:02:35,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1302212668, now seen corresponding path program 2 times [2021-12-14 17:02:35,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:02:35,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519551528] [2021-12-14 17:02:35,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:02:35,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:02:36,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:36,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:02:36,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:36,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:02:36,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:36,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:02:36,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:36,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:02:36,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:36,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 17:02:36,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:36,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 17:02:36,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:36,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 17:02:36,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:36,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-14 17:02:36,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:36,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-14 17:02:36,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:36,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-14 17:02:36,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:36,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-14 17:02:36,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:36,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-14 17:02:36,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:36,188 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-12-14 17:02:36,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:02:36,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519551528] [2021-12-14 17:02:36,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519551528] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:02:36,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970007279] [2021-12-14 17:02:36,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 17:02:36,189 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:02:36,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:02:36,190 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) [2021-12-14 17:02:36,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-14 17:02:36,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 17:02:36,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 17:02:36,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 2711 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-14 17:02:36,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:02:36,764 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-14 17:02:36,765 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:02:36,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970007279] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:02:36,765 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:02:36,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 11 [2021-12-14 17:02:36,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000806890] [2021-12-14 17:02:36,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:02:36,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 17:02:36,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:02:36,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 17:02:36,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-14 17:02:36,766 INFO L87 Difference]: Start difference. First operand 264 states and 346 transitions. Second operand has 9 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-14 17:02:36,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:02:36,900 INFO L93 Difference]: Finished difference Result 445 states and 603 transitions. [2021-12-14 17:02:36,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 17:02:36,901 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 124 [2021-12-14 17:02:36,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:02:36,902 INFO L225 Difference]: With dead ends: 445 [2021-12-14 17:02:36,902 INFO L226 Difference]: Without dead ends: 262 [2021-12-14 17:02:36,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 146 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-12-14 17:02:36,906 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 12 mSDsluCounter, 1061 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1220 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:02:36,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1220 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 17:02:36,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-12-14 17:02:36,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 262. [2021-12-14 17:02:36,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 182 states have (on average 1.120879120879121) internal successors, (204), 185 states have internal predecessors, (204), 58 states have call successors, (58), 17 states have call predecessors, (58), 21 states have return successors, (85), 59 states have call predecessors, (85), 57 states have call successors, (85) [2021-12-14 17:02:36,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 347 transitions. [2021-12-14 17:02:36,920 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 347 transitions. Word has length 124 [2021-12-14 17:02:36,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:02:36,920 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 347 transitions. [2021-12-14 17:02:36,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-14 17:02:36,920 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 347 transitions. [2021-12-14 17:02:36,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-12-14 17:02:36,922 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:02:36,922 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 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] [2021-12-14 17:02:36,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-14 17:02:37,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-14 17:02:37,142 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:02:37,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:02:37,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1114575085, now seen corresponding path program 1 times [2021-12-14 17:02:37,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:02:37,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839854714] [2021-12-14 17:02:37,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:02:37,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:02:37,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:37,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:02:37,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:37,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:02:37,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:37,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:02:37,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:37,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:02:37,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:37,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 17:02:37,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:37,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 17:02:37,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:37,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 17:02:37,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:37,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-14 17:02:37,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:37,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-14 17:02:37,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:37,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-14 17:02:37,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:37,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-14 17:02:37,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:37,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-14 17:02:37,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:37,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-14 17:02:37,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:37,573 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-12-14 17:02:37,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:02:37,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839854714] [2021-12-14 17:02:37,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839854714] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:02:37,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728110047] [2021-12-14 17:02:37,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:02:37,574 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:02:37,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:02:37,592 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) [2021-12-14 17:02:37,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-14 17:02:38,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:38,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 2749 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-14 17:02:38,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:02:38,277 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-14 17:02:38,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 14 [2021-12-14 17:02:38,384 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-14 17:02:38,384 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:02:38,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728110047] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:02:38,385 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:02:38,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [16] total 21 [2021-12-14 17:02:38,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48154923] [2021-12-14 17:02:38,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:02:38,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 17:02:38,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:02:38,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 17:02:38,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-12-14 17:02:38,386 INFO L87 Difference]: Start difference. First operand 262 states and 347 transitions. Second operand has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 8 states have internal predecessors, (69), 4 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-12-14 17:02:38,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:02:38,649 INFO L93 Difference]: Finished difference Result 434 states and 594 transitions. [2021-12-14 17:02:38,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-14 17:02:38,650 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 8 states have internal predecessors, (69), 4 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 127 [2021-12-14 17:02:38,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:02:38,651 INFO L225 Difference]: With dead ends: 434 [2021-12-14 17:02:38,651 INFO L226 Difference]: Without dead ends: 292 [2021-12-14 17:02:38,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 147 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2021-12-14 17:02:38,652 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 92 mSDsluCounter, 779 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 934 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 17:02:38,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 934 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 212 Invalid, 0 Unknown, 47 Unchecked, 0.2s Time] [2021-12-14 17:02:38,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-12-14 17:02:38,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 268. [2021-12-14 17:02:38,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 187 states have (on average 1.1122994652406417) internal successors, (208), 191 states have internal predecessors, (208), 58 states have call successors, (58), 17 states have call predecessors, (58), 22 states have return successors, (95), 59 states have call predecessors, (95), 57 states have call successors, (95) [2021-12-14 17:02:38,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 361 transitions. [2021-12-14 17:02:38,667 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 361 transitions. Word has length 127 [2021-12-14 17:02:38,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:02:38,667 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 361 transitions. [2021-12-14 17:02:38,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 8 states have internal predecessors, (69), 4 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-12-14 17:02:38,667 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 361 transitions. [2021-12-14 17:02:38,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-12-14 17:02:38,668 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:02:38,668 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 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] [2021-12-14 17:02:38,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-14 17:02:38,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:02:38,888 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:02:38,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:02:38,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1677762439, now seen corresponding path program 3 times [2021-12-14 17:02:38,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:02:38,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600006194] [2021-12-14 17:02:38,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:02:38,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:02:38,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:39,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:02:39,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:39,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:02:39,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:39,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:02:39,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:39,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:02:39,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:39,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 17:02:39,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:39,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 17:02:39,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:39,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 17:02:39,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:39,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-14 17:02:39,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:39,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-14 17:02:39,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:39,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-14 17:02:39,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:39,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-14 17:02:39,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:39,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-14 17:02:39,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:39,258 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 48 proven. 8 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-14 17:02:39,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:02:39,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600006194] [2021-12-14 17:02:39,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600006194] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:02:39,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024201201] [2021-12-14 17:02:39,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 17:02:39,258 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:02:39,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:02:39,272 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) [2021-12-14 17:02:39,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-14 17:02:39,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-14 17:02:39,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 17:02:39,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 2418 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-14 17:02:39,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:02:40,355 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 87 proven. 6 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-12-14 17:02:40,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 17:02:40,682 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-12-14 17:02:40,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2021-12-14 17:02:40,779 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 48 proven. 10 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-14 17:02:40,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024201201] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 17:02:40,779 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 17:02:40,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 11] total 25 [2021-12-14 17:02:40,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787851291] [2021-12-14 17:02:40,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 17:02:40,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-14 17:02:40,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:02:40,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-14 17:02:40,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2021-12-14 17:02:40,781 INFO L87 Difference]: Start difference. First operand 268 states and 361 transitions. Second operand has 25 states, 25 states have (on average 4.0) internal successors, (100), 24 states have internal predecessors, (100), 3 states have call successors, (18), 4 states have call predecessors, (18), 5 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-14 17:02:42,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:02:42,615 INFO L93 Difference]: Finished difference Result 424 states and 567 transitions. [2021-12-14 17:02:42,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-14 17:02:42,615 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.0) internal successors, (100), 24 states have internal predecessors, (100), 3 states have call successors, (18), 4 states have call predecessors, (18), 5 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 126 [2021-12-14 17:02:42,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:02:42,617 INFO L225 Difference]: With dead ends: 424 [2021-12-14 17:02:42,617 INFO L226 Difference]: Without dead ends: 331 [2021-12-14 17:02:42,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 257 SyntacticMatches, 11 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=278, Invalid=1204, Unknown=0, NotChecked=0, Total=1482 [2021-12-14 17:02:42,618 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 239 mSDsluCounter, 851 mSDsCounter, 0 mSdLazyCounter, 1448 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 1007 SdHoareTripleChecker+Invalid, 1751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 229 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:02:42,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 1007 Invalid, 1751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1448 Invalid, 0 Unknown, 229 Unchecked, 1.1s Time] [2021-12-14 17:02:42,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-12-14 17:02:42,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 297. [2021-12-14 17:02:42,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 212 states have (on average 1.1273584905660377) internal successors, (239), 218 states have internal predecessors, (239), 60 states have call successors, (60), 19 states have call predecessors, (60), 24 states have return successors, (97), 59 states have call predecessors, (97), 59 states have call successors, (97) [2021-12-14 17:02:42,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 396 transitions. [2021-12-14 17:02:42,630 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 396 transitions. Word has length 126 [2021-12-14 17:02:42,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:02:42,630 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 396 transitions. [2021-12-14 17:02:42,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.0) internal successors, (100), 24 states have internal predecessors, (100), 3 states have call successors, (18), 4 states have call predecessors, (18), 5 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-14 17:02:42,630 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 396 transitions. [2021-12-14 17:02:42,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-12-14 17:02:42,631 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:02:42,632 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:02:42,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-14 17:02:42,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-14 17:02:42,850 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:02:42,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:02:42,850 INFO L85 PathProgramCache]: Analyzing trace with hash 770691517, now seen corresponding path program 1 times [2021-12-14 17:02:42,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:02:42,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181601271] [2021-12-14 17:02:42,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:02:42,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:02:42,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:42,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:02:42,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:42,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:02:42,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:42,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:02:42,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:42,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:02:42,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:42,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 17:02:42,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:42,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 17:02:42,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:42,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 17:02:42,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:43,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-14 17:02:43,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:43,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-14 17:02:43,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:43,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-14 17:02:43,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:43,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-14 17:02:43,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:43,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-14 17:02:43,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:43,142 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 48 proven. 8 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-14 17:02:43,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:02:43,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181601271] [2021-12-14 17:02:43,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181601271] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:02:43,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474076379] [2021-12-14 17:02:43,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:02:43,143 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:02:43,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:02:43,144 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) [2021-12-14 17:02:43,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-14 17:02:43,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:43,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 2715 conjuncts, 72 conjunts are in the unsatisfiable core [2021-12-14 17:02:43,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:02:43,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-14 17:02:43,873 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 17:02:43,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 23 [2021-12-14 17:02:43,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 [2021-12-14 17:02:43,964 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 17:02:43,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 27 [2021-12-14 17:02:44,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-12-14 17:02:44,695 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 59 proven. 64 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-14 17:02:44,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 17:02:45,186 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-12-14 17:02:45,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2021-12-14 17:02:45,308 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 48 proven. 10 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-14 17:02:45,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474076379] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 17:02:45,308 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 17:02:45,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 23, 12] total 42 [2021-12-14 17:02:45,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037062330] [2021-12-14 17:02:45,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 17:02:45,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-14 17:02:45,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:02:45,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-14 17:02:45,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1573, Unknown=0, NotChecked=0, Total=1722 [2021-12-14 17:02:45,310 INFO L87 Difference]: Start difference. First operand 297 states and 396 transitions. Second operand has 42 states, 40 states have (on average 4.0) internal successors, (160), 39 states have internal predecessors, (160), 11 states have call successors, (30), 6 states have call predecessors, (30), 10 states have return successors, (27), 10 states have call predecessors, (27), 9 states have call successors, (27) [2021-12-14 17:02:49,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:02:49,455 INFO L93 Difference]: Finished difference Result 542 states and 751 transitions. [2021-12-14 17:02:49,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-12-14 17:02:49,455 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 40 states have (on average 4.0) internal successors, (160), 39 states have internal predecessors, (160), 11 states have call successors, (30), 6 states have call predecessors, (30), 10 states have return successors, (27), 10 states have call predecessors, (27), 9 states have call successors, (27) Word has length 126 [2021-12-14 17:02:49,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:02:49,457 INFO L225 Difference]: With dead ends: 542 [2021-12-14 17:02:49,457 INFO L226 Difference]: Without dead ends: 427 [2021-12-14 17:02:49,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 254 SyntacticMatches, 7 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3176 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1110, Invalid=10662, Unknown=0, NotChecked=0, Total=11772 [2021-12-14 17:02:49,461 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 543 mSDsluCounter, 1837 mSDsCounter, 0 mSdLazyCounter, 3184 mSolverCounterSat, 419 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 574 SdHoareTripleChecker+Valid, 2012 SdHoareTripleChecker+Invalid, 4329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 419 IncrementalHoareTripleChecker+Valid, 3184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 726 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-14 17:02:49,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [574 Valid, 2012 Invalid, 4329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [419 Valid, 3184 Invalid, 0 Unknown, 726 Unchecked, 1.9s Time] [2021-12-14 17:02:49,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-12-14 17:02:49,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 339. [2021-12-14 17:02:49,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 244 states have (on average 1.1270491803278688) internal successors, (275), 251 states have internal predecessors, (275), 66 states have call successors, (66), 22 states have call predecessors, (66), 28 states have return successors, (127), 65 states have call predecessors, (127), 65 states have call successors, (127) [2021-12-14 17:02:49,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 468 transitions. [2021-12-14 17:02:49,478 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 468 transitions. Word has length 126 [2021-12-14 17:02:49,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:02:49,480 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 468 transitions. [2021-12-14 17:02:49,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 40 states have (on average 4.0) internal successors, (160), 39 states have internal predecessors, (160), 11 states have call successors, (30), 6 states have call predecessors, (30), 10 states have return successors, (27), 10 states have call predecessors, (27), 9 states have call successors, (27) [2021-12-14 17:02:49,480 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 468 transitions. [2021-12-14 17:02:49,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-14 17:02:49,481 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:02:49,482 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:02:49,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-14 17:02:49,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-14 17:02:49,701 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:02:49,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:02:49,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1467387166, now seen corresponding path program 1 times [2021-12-14 17:02:49,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:02:49,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479225261] [2021-12-14 17:02:49,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:02:49,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:02:49,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:49,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:02:49,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:49,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:02:49,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:49,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:02:49,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:49,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:02:49,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:49,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 17:02:49,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:49,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 17:02:49,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:49,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 17:02:49,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:49,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-14 17:02:49,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:49,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-14 17:02:49,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:49,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-14 17:02:49,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:49,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-14 17:02:49,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:49,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-14 17:02:49,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:49,929 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-12-14 17:02:49,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:02:49,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479225261] [2021-12-14 17:02:49,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479225261] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:02:49,929 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:02:49,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-14 17:02:49,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728450638] [2021-12-14 17:02:49,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:02:49,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-14 17:02:49,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:02:49,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-14 17:02:49,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-12-14 17:02:49,932 INFO L87 Difference]: Start difference. First operand 339 states and 468 transitions. Second operand has 11 states, 10 states have (on average 5.4) internal successors, (54), 8 states have internal predecessors, (54), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2021-12-14 17:02:50,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:02:50,338 INFO L93 Difference]: Finished difference Result 355 states and 488 transitions. [2021-12-14 17:02:50,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-14 17:02:50,339 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.4) internal successors, (54), 8 states have internal predecessors, (54), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) Word has length 128 [2021-12-14 17:02:50,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:02:50,341 INFO L225 Difference]: With dead ends: 355 [2021-12-14 17:02:50,341 INFO L226 Difference]: Without dead ends: 353 [2021-12-14 17:02:50,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-12-14 17:02:50,342 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 94 mSDsluCounter, 741 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 885 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 17:02:50,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 885 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 17:02:50,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-12-14 17:02:50,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 345. [2021-12-14 17:02:50,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 249 states have (on average 1.1244979919678715) internal successors, (280), 257 states have internal predecessors, (280), 66 states have call successors, (66), 22 states have call predecessors, (66), 29 states have return successors, (131), 65 states have call predecessors, (131), 65 states have call successors, (131) [2021-12-14 17:02:50,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 477 transitions. [2021-12-14 17:02:50,358 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 477 transitions. Word has length 128 [2021-12-14 17:02:50,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:02:50,359 INFO L470 AbstractCegarLoop]: Abstraction has 345 states and 477 transitions. [2021-12-14 17:02:50,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.4) internal successors, (54), 8 states have internal predecessors, (54), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2021-12-14 17:02:50,360 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 477 transitions. [2021-12-14 17:02:50,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-14 17:02:50,361 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:02:50,361 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:02:50,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-14 17:02:50,362 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:02:50,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:02:50,362 INFO L85 PathProgramCache]: Analyzing trace with hash -766322588, now seen corresponding path program 1 times [2021-12-14 17:02:50,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:02:50,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996526491] [2021-12-14 17:02:50,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:02:50,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:02:50,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:50,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:02:50,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:50,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:02:50,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:50,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:02:50,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:50,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:02:50,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:50,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 17:02:50,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:50,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 17:02:50,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:50,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 17:02:50,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:50,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-14 17:02:50,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:50,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-14 17:02:50,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:50,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-14 17:02:50,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:50,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-14 17:02:50,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:50,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-14 17:02:50,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:50,734 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 52 proven. 8 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-14 17:02:50,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:02:50,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996526491] [2021-12-14 17:02:50,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996526491] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:02:50,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495915453] [2021-12-14 17:02:50,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:02:50,735 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:02:50,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:02:50,736 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) [2021-12-14 17:02:50,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-14 17:02:51,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:51,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 2725 conjuncts, 95 conjunts are in the unsatisfiable core [2021-12-14 17:02:51,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:02:51,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-14 17:02:51,641 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 17:02:51,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 23 [2021-12-14 17:02:51,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 [2021-12-14 17:02:51,723 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 17:02:51,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 27 [2021-12-14 17:02:52,657 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 62 proven. 65 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-14 17:02:52,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 17:02:53,727 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-12-14 17:02:53,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2021-12-14 17:02:53,909 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-14 17:02:53,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495915453] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 17:02:53,909 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 17:02:53,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 33, 17] total 55 [2021-12-14 17:02:53,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208509759] [2021-12-14 17:02:53,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 17:02:53,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-12-14 17:02:53,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:02:53,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-12-14 17:02:53,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=2793, Unknown=0, NotChecked=0, Total=2970 [2021-12-14 17:02:53,912 INFO L87 Difference]: Start difference. First operand 345 states and 477 transitions. Second operand has 55 states, 51 states have (on average 3.2941176470588234) internal successors, (168), 49 states have internal predecessors, (168), 13 states have call successors, (31), 7 states have call predecessors, (31), 11 states have return successors, (27), 12 states have call predecessors, (27), 10 states have call successors, (27) [2021-12-14 17:02:57,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:02:57,645 INFO L93 Difference]: Finished difference Result 575 states and 783 transitions. [2021-12-14 17:02:57,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-12-14 17:02:57,646 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 51 states have (on average 3.2941176470588234) internal successors, (168), 49 states have internal predecessors, (168), 13 states have call successors, (31), 7 states have call predecessors, (31), 11 states have return successors, (27), 12 states have call predecessors, (27), 10 states have call successors, (27) Word has length 128 [2021-12-14 17:02:57,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:02:57,648 INFO L225 Difference]: With dead ends: 575 [2021-12-14 17:02:57,648 INFO L226 Difference]: Without dead ends: 453 [2021-12-14 17:02:57,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 240 SyntacticMatches, 6 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3321 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=655, Invalid=11117, Unknown=0, NotChecked=0, Total=11772 [2021-12-14 17:02:57,651 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 420 mSDsluCounter, 3062 mSDsCounter, 0 mSdLazyCounter, 3518 mSolverCounterSat, 296 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 3262 SdHoareTripleChecker+Invalid, 4917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 296 IncrementalHoareTripleChecker+Valid, 3518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1103 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-14 17:02:57,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [431 Valid, 3262 Invalid, 4917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [296 Valid, 3518 Invalid, 0 Unknown, 1103 Unchecked, 2.0s Time] [2021-12-14 17:02:57,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-12-14 17:02:57,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 346. [2021-12-14 17:02:57,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 250 states have (on average 1.12) internal successors, (280), 257 states have internal predecessors, (280), 66 states have call successors, (66), 23 states have call predecessors, (66), 29 states have return successors, (118), 65 states have call predecessors, (118), 65 states have call successors, (118) [2021-12-14 17:02:57,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 464 transitions. [2021-12-14 17:02:57,667 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 464 transitions. Word has length 128 [2021-12-14 17:02:57,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:02:57,668 INFO L470 AbstractCegarLoop]: Abstraction has 346 states and 464 transitions. [2021-12-14 17:02:57,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 51 states have (on average 3.2941176470588234) internal successors, (168), 49 states have internal predecessors, (168), 13 states have call successors, (31), 7 states have call predecessors, (31), 11 states have return successors, (27), 12 states have call predecessors, (27), 10 states have call successors, (27) [2021-12-14 17:02:57,668 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 464 transitions. [2021-12-14 17:02:57,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-12-14 17:02:57,669 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:02:57,670 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-12-14 17:02:57,690 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-12-14 17:02:57,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:02:57,891 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:02:57,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:02:57,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1021256771, now seen corresponding path program 1 times [2021-12-14 17:02:57,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:02:57,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674108832] [2021-12-14 17:02:57,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:02:57,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:02:58,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:58,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:02:58,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:58,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:02:58,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:58,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:02:58,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:58,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:02:58,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:58,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 17:02:58,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:58,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 17:02:58,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:58,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 17:02:58,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:58,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-14 17:02:58,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:58,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-14 17:02:58,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:58,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-14 17:02:58,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:58,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-14 17:02:58,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:58,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-14 17:02:58,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:58,210 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 22 proven. 8 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2021-12-14 17:02:58,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:02:58,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674108832] [2021-12-14 17:02:58,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674108832] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:02:58,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124837144] [2021-12-14 17:02:58,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:02:58,211 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:02:58,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:02:58,212 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) [2021-12-14 17:02:58,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-14 17:02:58,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:58,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 2725 conjuncts, 59 conjunts are in the unsatisfiable core [2021-12-14 17:02:58,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:02:58,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:02:58,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-14 17:02:59,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:02:59,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-14 17:02:59,476 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 110 proven. 29 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-14 17:02:59,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 17:03:00,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124837144] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:03:00,782 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 17:03:00,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16] total 24 [2021-12-14 17:03:00,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145387768] [2021-12-14 17:03:00,782 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 17:03:00,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-14 17:03:00,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:03:00,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-14 17:03:00,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=839, Unknown=1, NotChecked=0, Total=930 [2021-12-14 17:03:00,783 INFO L87 Difference]: Start difference. First operand 346 states and 464 transitions. Second operand has 24 states, 21 states have (on average 6.523809523809524) internal successors, (137), 21 states have internal predecessors, (137), 8 states have call successors, (26), 5 states have call predecessors, (26), 7 states have return successors, (23), 6 states have call predecessors, (23), 7 states have call successors, (23) [2021-12-14 17:03:02,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:03:02,511 INFO L93 Difference]: Finished difference Result 607 states and 797 transitions. [2021-12-14 17:03:02,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-14 17:03:02,512 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 6.523809523809524) internal successors, (137), 21 states have internal predecessors, (137), 8 states have call successors, (26), 5 states have call predecessors, (26), 7 states have return successors, (23), 6 states have call predecessors, (23), 7 states have call successors, (23) Word has length 130 [2021-12-14 17:03:02,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:03:02,513 INFO L225 Difference]: With dead ends: 607 [2021-12-14 17:03:02,513 INFO L226 Difference]: Without dead ends: 329 [2021-12-14 17:03:02,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 185 SyntacticMatches, 9 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=436, Invalid=3469, Unknown=1, NotChecked=0, Total=3906 [2021-12-14 17:03:02,516 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 179 mSDsluCounter, 2012 mSDsCounter, 0 mSdLazyCounter, 1642 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 2207 SdHoareTripleChecker+Invalid, 2395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 700 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-14 17:03:02,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 2207 Invalid, 2395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1642 Invalid, 0 Unknown, 700 Unchecked, 0.8s Time] [2021-12-14 17:03:02,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-12-14 17:03:02,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 289. [2021-12-14 17:03:02,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 212 states have (on average 1.1037735849056605) internal successors, (234), 218 states have internal predecessors, (234), 51 states have call successors, (51), 20 states have call predecessors, (51), 25 states have return successors, (73), 50 states have call predecessors, (73), 50 states have call successors, (73) [2021-12-14 17:03:02,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 358 transitions. [2021-12-14 17:03:02,529 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 358 transitions. Word has length 130 [2021-12-14 17:03:02,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:03:02,529 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 358 transitions. [2021-12-14 17:03:02,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 6.523809523809524) internal successors, (137), 21 states have internal predecessors, (137), 8 states have call successors, (26), 5 states have call predecessors, (26), 7 states have return successors, (23), 6 states have call predecessors, (23), 7 states have call successors, (23) [2021-12-14 17:03:02,529 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 358 transitions. [2021-12-14 17:03:02,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-12-14 17:03:02,531 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:03:02,531 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:03:02,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-14 17:03:02,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:03:02,750 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:03:02,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:03:02,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1247100630, now seen corresponding path program 1 times [2021-12-14 17:03:02,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:03:02,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039516127] [2021-12-14 17:03:02,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:03:02,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:03:02,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:02,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:03:02,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:02,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:03:02,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:02,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:03:02,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:02,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:03:02,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:02,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 17:03:02,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:02,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 17:03:02,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:02,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 17:03:02,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:02,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-14 17:03:02,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:02,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-14 17:03:02,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:03,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-14 17:03:03,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:03,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-14 17:03:03,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:03,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-14 17:03:03,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:03,076 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 32 proven. 14 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-12-14 17:03:03,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:03:03,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039516127] [2021-12-14 17:03:03,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039516127] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:03:03,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802996563] [2021-12-14 17:03:03,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:03:03,077 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:03:03,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:03:03,078 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) [2021-12-14 17:03:03,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-14 17:03:03,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:03,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 2722 conjuncts, 64 conjunts are in the unsatisfiable core [2021-12-14 17:03:03,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:03:03,857 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 17:03:03,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 25 [2021-12-14 17:03:03,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 6 [2021-12-14 17:03:03,953 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 17:03:03,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 29 [2021-12-14 17:03:04,434 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 68 proven. 50 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-14 17:03:04,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 17:03:04,860 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 60 proven. 14 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-14 17:03:04,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802996563] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 17:03:04,861 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 17:03:04,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 18, 9] total 31 [2021-12-14 17:03:04,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214009786] [2021-12-14 17:03:04,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 17:03:04,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-14 17:03:04,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:03:04,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-14 17:03:04,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2021-12-14 17:03:04,862 INFO L87 Difference]: Start difference. First operand 289 states and 358 transitions. Second operand has 31 states, 28 states have (on average 5.107142857142857) internal successors, (143), 28 states have internal predecessors, (143), 11 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (27), 8 states have call predecessors, (27), 10 states have call successors, (27) [2021-12-14 17:03:07,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:03:07,865 INFO L93 Difference]: Finished difference Result 536 states and 721 transitions. [2021-12-14 17:03:07,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-14 17:03:07,867 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 5.107142857142857) internal successors, (143), 28 states have internal predecessors, (143), 11 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (27), 8 states have call predecessors, (27), 10 states have call successors, (27) Word has length 132 [2021-12-14 17:03:07,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:03:07,869 INFO L225 Difference]: With dead ends: 536 [2021-12-14 17:03:07,869 INFO L226 Difference]: Without dead ends: 394 [2021-12-14 17:03:07,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 274 SyntacticMatches, 6 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=415, Invalid=3125, Unknown=0, NotChecked=0, Total=3540 [2021-12-14 17:03:07,872 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 316 mSDsluCounter, 1501 mSDsCounter, 0 mSdLazyCounter, 2955 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 1668 SdHoareTripleChecker+Invalid, 3731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 2955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 541 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-14 17:03:07,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 1668 Invalid, 3731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 2955 Invalid, 0 Unknown, 541 Unchecked, 2.2s Time] [2021-12-14 17:03:07,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-12-14 17:03:07,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 313. [2021-12-14 17:03:07,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 230 states have (on average 1.0956521739130434) internal successors, (252), 234 states have internal predecessors, (252), 55 states have call successors, (55), 22 states have call predecessors, (55), 27 states have return successors, (78), 56 states have call predecessors, (78), 54 states have call successors, (78) [2021-12-14 17:03:07,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 385 transitions. [2021-12-14 17:03:07,891 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 385 transitions. Word has length 132 [2021-12-14 17:03:07,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:03:07,891 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 385 transitions. [2021-12-14 17:03:07,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 5.107142857142857) internal successors, (143), 28 states have internal predecessors, (143), 11 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (27), 8 states have call predecessors, (27), 10 states have call successors, (27) [2021-12-14 17:03:07,892 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 385 transitions. [2021-12-14 17:03:07,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-12-14 17:03:07,893 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:03:07,893 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]