./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_byte_cursor_trim_pred_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 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_cursor_trim_pred_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 2fd96106837ff3ee9325c248fea6969b94a5a1f2cee078fd159398f70369aafc --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 13:58:34,089 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 13:58:34,091 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 13:58:34,123 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 13:58:34,124 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 13:58:34,126 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 13:58:34,127 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 13:58:34,129 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 13:58:34,130 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 13:58:34,133 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 13:58:34,133 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 13:58:34,134 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 13:58:34,134 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 13:58:34,136 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 13:58:34,137 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 13:58:34,140 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 13:58:34,140 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 13:58:34,141 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 13:58:34,142 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 13:58:34,148 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 13:58:34,149 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 13:58:34,150 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 13:58:34,151 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 13:58:34,152 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 13:58:34,157 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 13:58:34,157 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 13:58:34,158 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 13:58:34,159 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 13:58:34,159 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 13:58:34,160 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 13:58:34,160 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 13:58:34,161 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 13:58:34,162 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 13:58:34,162 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 13:58:34,163 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 13:58:34,163 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 13:58:34,164 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 13:58:34,164 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 13:58:34,164 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 13:58:34,165 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 13:58:34,165 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 13:58:34,166 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-22 13:58:34,189 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 13:58:34,190 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 13:58:34,190 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 13:58:34,190 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 13:58:34,191 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 13:58:34,191 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 13:58:34,191 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 13:58:34,192 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 13:58:34,192 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 13:58:34,192 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 13:58:34,193 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 13:58:34,193 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 13:58:34,193 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 13:58:34,193 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 13:58:34,193 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 13:58:34,193 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 13:58:34,193 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 13:58:34,194 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 13:58:34,194 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 13:58:34,194 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 13:58:34,194 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 13:58:34,194 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:58:34,194 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 13:58:34,195 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 13:58:34,195 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 13:58:34,195 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 13:58:34,195 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 13:58:34,195 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 13:58:34,195 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 13:58:34,195 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 13:58:34,197 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 13:58:34,197 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2fd96106837ff3ee9325c248fea6969b94a5a1f2cee078fd159398f70369aafc [2021-12-22 13:58:34,349 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 13:58:34,368 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 13:58:34,370 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 13:58:34,371 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 13:58:34,371 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 13:58:34,372 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_byte_cursor_trim_pred_harness.i [2021-12-22 13:58:34,407 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e73f694b/6f5d9d6cbe044c3ab60f2ca08820ba43/FLAG142288e7d [2021-12-22 13:58:34,989 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 13:58:34,989 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_cursor_trim_pred_harness.i [2021-12-22 13:58:35,014 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e73f694b/6f5d9d6cbe044c3ab60f2ca08820ba43/FLAG142288e7d [2021-12-22 13:58:35,438 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e73f694b/6f5d9d6cbe044c3ab60f2ca08820ba43 [2021-12-22 13:58:35,440 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 13:58:35,441 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 13:58:35,444 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 13:58:35,444 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 13:58:35,446 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 13:58:35,447 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:58:35" (1/1) ... [2021-12-22 13:58:35,448 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2333bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:58:35, skipping insertion in model container [2021-12-22 13:58:35,448 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:58:35" (1/1) ... [2021-12-22 13:58:35,452 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 13:58:35,537 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 13:58:35,707 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_cursor_trim_pred_harness.i[4499,4512] [2021-12-22 13:58:35,712 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_cursor_trim_pred_harness.i[4559,4572] [2021-12-22 13:58:36,273 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:58:36,276 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:58:36,277 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:58:36,278 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:58:36,279 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:58:36,288 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:58:36,288 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:58:36,290 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:58:36,290 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:58:36,507 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-22 13:58:36,508 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-22 13:58:36,509 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-22 13:58:36,510 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-22 13:58:36,510 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-22 13:58:36,511 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-22 13:58:36,511 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-22 13:58:36,512 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-22 13:58:36,512 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-22 13:58:36,512 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-22 13:58:36,593 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-22 13:58:36,665 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:58:36,665 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:58:36,703 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:58:36,750 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 13:58:36,766 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_cursor_trim_pred_harness.i[4499,4512] [2021-12-22 13:58:36,767 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_cursor_trim_pred_harness.i[4559,4572] [2021-12-22 13:58:36,795 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:58:36,796 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:58:36,796 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:58:36,797 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:58:36,798 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:58:36,804 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:58:36,805 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:58:36,806 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:58:36,807 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:58:36,839 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-22 13:58:36,839 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-22 13:58:36,840 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-22 13:58:36,840 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-22 13:58:36,841 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-22 13:58:36,841 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-22 13:58:36,841 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-22 13:58:36,842 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-22 13:58:36,842 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-22 13:58:36,844 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-22 13:58:36,863 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-22 13:58:36,905 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:58:36,906 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:58:36,947 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:58:37,059 INFO L208 MainTranslator]: Completed translation [2021-12-22 13:58:37,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:58:37 WrapperNode [2021-12-22 13:58:37,060 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 13:58:37,061 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 13:58:37,061 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 13:58:37,061 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 13:58:37,070 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:58:37" (1/1) ... [2021-12-22 13:58:37,144 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:58:37" (1/1) ... [2021-12-22 13:58:37,201 INFO L137 Inliner]: procedures = 690, calls = 2620, calls flagged for inlining = 62, calls inlined = 10, statements flattened = 894 [2021-12-22 13:58:37,202 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 13:58:37,202 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 13:58:37,203 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 13:58:37,203 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 13:58:37,210 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:58:37" (1/1) ... [2021-12-22 13:58:37,210 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:58:37" (1/1) ... [2021-12-22 13:58:37,218 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:58:37" (1/1) ... [2021-12-22 13:58:37,219 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:58:37" (1/1) ... [2021-12-22 13:58:37,238 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:58:37" (1/1) ... [2021-12-22 13:58:37,242 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:58:37" (1/1) ... [2021-12-22 13:58:37,247 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:58:37" (1/1) ... [2021-12-22 13:58:37,256 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 13:58:37,257 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 13:58:37,257 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 13:58:37,257 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 13:58:37,258 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:58:37" (1/1) ... [2021-12-22 13:58:37,273 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:58:37,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:58:37,309 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) [2021-12-22 13:58:37,354 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 [2021-12-22 13:58:37,392 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_is_valid [2021-12-22 13:58:37,393 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_is_valid [2021-12-22 13:58:37,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 13:58:37,393 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-12-22 13:58:37,393 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-12-22 13:58:37,393 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-22 13:58:37,393 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-22 13:58:37,394 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-22 13:58:37,394 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_left_trim_pred [2021-12-22 13:58:37,394 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_left_trim_pred [2021-12-22 13:58:37,394 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-22 13:58:37,395 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 13:58:37,395 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-22 13:58:37,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 13:58:37,395 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 13:58:37,395 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-12-22 13:58:37,396 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-12-22 13:58:37,396 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-12-22 13:58:37,396 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-12-22 13:58:37,396 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-22 13:58:37,396 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-22 13:58:37,396 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 13:58:37,396 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-22 13:58:37,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-22 13:58:37,397 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~~uint8_t~0~TO~int [2021-12-22 13:58:37,397 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~~uint8_t~0~TO~int [2021-12-22 13:58:37,397 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 13:58:37,397 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 13:58:37,635 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 13:58:37,636 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 13:58:38,318 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 13:58:38,331 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 13:58:38,332 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-22 13:58:38,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:58:38 BoogieIcfgContainer [2021-12-22 13:58:38,333 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 13:58:38,334 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 13:58:38,334 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 13:58:38,336 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 13:58:38,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:58:35" (1/3) ... [2021-12-22 13:58:38,337 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61adfbc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:58:38, skipping insertion in model container [2021-12-22 13:58:38,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:58:37" (2/3) ... [2021-12-22 13:58:38,338 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61adfbc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:58:38, skipping insertion in model container [2021-12-22 13:58:38,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:58:38" (3/3) ... [2021-12-22 13:58:38,339 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_cursor_trim_pred_harness.i [2021-12-22 13:58:38,342 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 13:58:38,343 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 13:58:38,384 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 13:58:38,400 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 [2021-12-22 13:58:38,401 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 13:58:38,416 INFO L276 IsEmpty]: Start isEmpty. Operand has 124 states, 77 states have (on average 1.2337662337662338) internal successors, (95), 78 states have internal predecessors, (95), 37 states have call successors, (37), 8 states have call predecessors, (37), 8 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2021-12-22 13:58:38,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-22 13:58:38,425 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:58:38,425 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] [2021-12-22 13:58:38,426 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:58:38,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:58:38,430 INFO L85 PathProgramCache]: Analyzing trace with hash -484495775, now seen corresponding path program 1 times [2021-12-22 13:58:38,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:58:38,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409958007] [2021-12-22 13:58:38,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:58:38,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:58:38,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:38,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 13:58:38,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:38,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 13:58:38,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:38,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 13:58:38,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:38,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-22 13:58:38,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:38,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-22 13:58:38,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:38,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-22 13:58:38,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:38,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 13:58:38,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:38,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-22 13:58:38,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:38,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-22 13:58:38,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:38,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-22 13:58:38,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:38,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-22 13:58:38,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:38,949 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-22 13:58:38,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:58:38,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409958007] [2021-12-22 13:58:38,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409958007] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:58:38,950 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:58:38,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 13:58:38,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421758808] [2021-12-22 13:58:38,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:58:38,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-22 13:58:38,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:58:38,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-22 13:58:38,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 13:58:38,999 INFO L87 Difference]: Start difference. First operand has 124 states, 77 states have (on average 1.2337662337662338) internal successors, (95), 78 states have internal predecessors, (95), 37 states have call successors, (37), 8 states have call predecessors, (37), 8 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) Second operand has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-22 13:58:39,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:58:39,039 INFO L93 Difference]: Finished difference Result 244 states and 355 transitions. [2021-12-22 13:58:39,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-22 13:58:39,041 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 79 [2021-12-22 13:58:39,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:58:39,048 INFO L225 Difference]: With dead ends: 244 [2021-12-22 13:58:39,048 INFO L226 Difference]: Without dead ends: 115 [2021-12-22 13:58:39,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 13:58:39,053 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:58:39,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:58:39,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-12-22 13:58:39,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2021-12-22 13:58:39,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 70 states have (on average 1.1714285714285715) internal successors, (82), 71 states have internal predecessors, (82), 37 states have call successors, (37), 8 states have call predecessors, (37), 7 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2021-12-22 13:58:39,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 154 transitions. [2021-12-22 13:58:39,087 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 154 transitions. Word has length 79 [2021-12-22 13:58:39,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:58:39,087 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 154 transitions. [2021-12-22 13:58:39,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-22 13:58:39,087 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 154 transitions. [2021-12-22 13:58:39,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-22 13:58:39,090 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:58:39,090 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] [2021-12-22 13:58:39,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 13:58:39,091 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:58:39,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:58:39,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1850978430, now seen corresponding path program 1 times [2021-12-22 13:58:39,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:58:39,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894251709] [2021-12-22 13:58:39,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:58:39,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:58:39,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:39,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 13:58:39,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:39,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 13:58:39,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:39,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 13:58:39,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:39,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-22 13:58:39,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:39,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-22 13:58:39,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:39,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-22 13:58:39,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:39,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 13:58:39,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:39,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-22 13:58:39,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:39,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-22 13:58:39,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:39,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-22 13:58:39,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:39,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-22 13:58:39,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:39,358 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-22 13:58:39,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:58:39,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894251709] [2021-12-22 13:58:39,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894251709] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:58:39,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277553350] [2021-12-22 13:58:39,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:58:39,359 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:58:39,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:58:39,360 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) [2021-12-22 13:58:39,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 13:58:39,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:39,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 2552 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 13:58:39,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:58:39,970 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-12-22 13:58:39,970 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:58:39,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277553350] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:58:39,971 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:58:39,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2021-12-22 13:58:39,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246431825] [2021-12-22 13:58:39,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:58:39,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:58:39,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:58:39,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:58:39,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-22 13:58:39,974 INFO L87 Difference]: Start difference. First operand 115 states and 154 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-22 13:58:40,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:58:40,169 INFO L93 Difference]: Finished difference Result 213 states and 298 transitions. [2021-12-22 13:58:40,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 13:58:40,170 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 81 [2021-12-22 13:58:40,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:58:40,172 INFO L225 Difference]: With dead ends: 213 [2021-12-22 13:58:40,172 INFO L226 Difference]: Without dead ends: 118 [2021-12-22 13:58:40,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-12-22 13:58:40,174 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 171 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:58:40,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 296 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 13:58:40,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-12-22 13:58:40,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2021-12-22 13:58:40,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 72 states have (on average 1.1666666666666667) internal successors, (84), 74 states have internal predecessors, (84), 37 states have call successors, (37), 8 states have call predecessors, (37), 8 states have return successors, (45), 35 states have call predecessors, (45), 35 states have call successors, (45) [2021-12-22 13:58:40,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 166 transitions. [2021-12-22 13:58:40,185 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 166 transitions. Word has length 81 [2021-12-22 13:58:40,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:58:40,186 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 166 transitions. [2021-12-22 13:58:40,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-22 13:58:40,186 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 166 transitions. [2021-12-22 13:58:40,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-22 13:58:40,188 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:58:40,188 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] [2021-12-22 13:58:40,212 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-22 13:58:40,412 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 [2021-12-22 13:58:40,412 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:58:40,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:58:40,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1473940729, now seen corresponding path program 1 times [2021-12-22 13:58:40,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:58:40,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060454940] [2021-12-22 13:58:40,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:58:40,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:58:40,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:40,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 13:58:40,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:40,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 13:58:40,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:40,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 13:58:40,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:40,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 13:58:40,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:40,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-22 13:58:40,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:40,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-22 13:58:40,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:40,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-22 13:58:40,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:40,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-22 13:58:40,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:40,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-22 13:58:40,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:40,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-22 13:58:40,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:40,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-22 13:58:40,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:40,657 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-22 13:58:40,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:58:40,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060454940] [2021-12-22 13:58:40,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060454940] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:58:40,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677953405] [2021-12-22 13:58:40,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:58:40,658 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:58:40,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:58:40,659 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) [2021-12-22 13:58:40,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 13:58:41,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:41,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 2557 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-22 13:58:41,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:58:41,182 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-22 13:58:41,182 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:58:41,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677953405] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:58:41,182 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:58:41,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2021-12-22 13:58:41,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377704461] [2021-12-22 13:58:41,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:58:41,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:58:41,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:58:41,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:58:41,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-12-22 13:58:41,184 INFO L87 Difference]: Start difference. First operand 118 states and 166 transitions. Second operand has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 7 states have internal predecessors, (43), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-22 13:58:41,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:58:41,378 INFO L93 Difference]: Finished difference Result 208 states and 295 transitions. [2021-12-22 13:58:41,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:58:41,379 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 7 states have internal predecessors, (43), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 83 [2021-12-22 13:58:41,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:58:41,381 INFO L225 Difference]: With dead ends: 208 [2021-12-22 13:58:41,381 INFO L226 Difference]: Without dead ends: 118 [2021-12-22 13:58:41,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-12-22 13:58:41,384 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 189 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:58:41,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 481 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 13:58:41,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-12-22 13:58:41,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2021-12-22 13:58:41,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 72 states have (on average 1.1666666666666667) internal successors, (84), 74 states have internal predecessors, (84), 37 states have call successors, (37), 8 states have call predecessors, (37), 8 states have return successors, (43), 35 states have call predecessors, (43), 35 states have call successors, (43) [2021-12-22 13:58:41,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 164 transitions. [2021-12-22 13:58:41,408 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 164 transitions. Word has length 83 [2021-12-22 13:58:41,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:58:41,409 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 164 transitions. [2021-12-22 13:58:41,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 7 states have internal predecessors, (43), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-22 13:58:41,409 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 164 transitions. [2021-12-22 13:58:41,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-22 13:58:41,411 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:58:41,414 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:58:41,440 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-22 13:58:41,628 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 [2021-12-22 13:58:41,629 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:58:41,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:58:41,629 INFO L85 PathProgramCache]: Analyzing trace with hash -346545804, now seen corresponding path program 2 times [2021-12-22 13:58:41,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:58:41,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935032665] [2021-12-22 13:58:41,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:58:41,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:58:41,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:41,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 13:58:41,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:41,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 13:58:41,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:41,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 13:58:41,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:41,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 13:58:41,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:41,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-22 13:58:41,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:41,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-22 13:58:41,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:41,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-22 13:58:41,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:41,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 13:58:41,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:41,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-22 13:58:41,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:41,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-22 13:58:41,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:41,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-22 13:58:41,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:41,899 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-22 13:58:41,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:58:41,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935032665] [2021-12-22 13:58:41,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935032665] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:58:41,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355264998] [2021-12-22 13:58:41,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 13:58:41,900 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:58:41,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:58:41,901 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) [2021-12-22 13:58:41,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 13:58:42,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 13:58:42,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:58:42,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 2562 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-22 13:58:42,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:58:42,556 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-12-22 13:58:42,556 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:58:42,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355264998] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:58:42,557 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:58:42,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 18 [2021-12-22 13:58:42,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742995561] [2021-12-22 13:58:42,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:58:42,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 13:58:42,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:58:42,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 13:58:42,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-12-22 13:58:42,558 INFO L87 Difference]: Start difference. First operand 118 states and 164 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 4 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-22 13:58:42,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:58:42,819 INFO L93 Difference]: Finished difference Result 201 states and 281 transitions. [2021-12-22 13:58:42,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 13:58:42,820 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 4 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) Word has length 85 [2021-12-22 13:58:42,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:58:42,821 INFO L225 Difference]: With dead ends: 201 [2021-12-22 13:58:42,821 INFO L226 Difference]: Without dead ends: 118 [2021-12-22 13:58:42,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-12-22 13:58:42,823 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 196 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 13:58:42,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 642 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 13:58:42,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-12-22 13:58:42,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2021-12-22 13:58:42,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 72 states have (on average 1.1666666666666667) internal successors, (84), 74 states have internal predecessors, (84), 37 states have call successors, (37), 8 states have call predecessors, (37), 8 states have return successors, (41), 35 states have call predecessors, (41), 35 states have call successors, (41) [2021-12-22 13:58:42,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 162 transitions. [2021-12-22 13:58:42,838 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 162 transitions. Word has length 85 [2021-12-22 13:58:42,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:58:42,838 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 162 transitions. [2021-12-22 13:58:42,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 4 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-22 13:58:42,838 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 162 transitions. [2021-12-22 13:58:42,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-22 13:58:42,839 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:58:42,840 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2021-12-22 13:58:42,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 13:58:43,075 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 [2021-12-22 13:58:43,076 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:58:43,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:58:43,076 INFO L85 PathProgramCache]: Analyzing trace with hash 625417492, now seen corresponding path program 1 times [2021-12-22 13:58:43,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:58:43,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801308900] [2021-12-22 13:58:43,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:58:43,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:58:43,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:43,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 13:58:43,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:43,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 13:58:43,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:43,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 13:58:43,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:43,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 13:58:43,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:43,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-22 13:58:43,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:43,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-22 13:58:43,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:43,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-22 13:58:43,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:43,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 13:58:43,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:43,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-22 13:58:43,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:43,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-22 13:58:43,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:43,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-22 13:58:43,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:43,339 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-22 13:58:43,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:58:43,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801308900] [2021-12-22 13:58:43,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801308900] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:58:43,340 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:58:43,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 13:58:43,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683205800] [2021-12-22 13:58:43,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:58:43,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 13:58:43,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:58:43,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 13:58:43,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:58:43,341 INFO L87 Difference]: Start difference. First operand 118 states and 162 transitions. Second operand has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2021-12-22 13:58:43,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:58:43,385 INFO L93 Difference]: Finished difference Result 130 states and 185 transitions. [2021-12-22 13:58:43,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 13:58:43,385 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) Word has length 89 [2021-12-22 13:58:43,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:58:43,387 INFO L225 Difference]: With dead ends: 130 [2021-12-22 13:58:43,387 INFO L226 Difference]: Without dead ends: 128 [2021-12-22 13:58:43,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:58:43,388 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 16 mSDsluCounter, 916 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 1074 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:58:43,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 1074 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:58:43,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-12-22 13:58:43,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2021-12-22 13:58:43,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 78 states have (on average 1.1538461538461537) internal successors, (90), 81 states have internal predecessors, (90), 38 states have call successors, (38), 9 states have call predecessors, (38), 10 states have return successors, (54), 36 states have call predecessors, (54), 36 states have call successors, (54) [2021-12-22 13:58:43,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 182 transitions. [2021-12-22 13:58:43,403 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 182 transitions. Word has length 89 [2021-12-22 13:58:43,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:58:43,404 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 182 transitions. [2021-12-22 13:58:43,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2021-12-22 13:58:43,404 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 182 transitions. [2021-12-22 13:58:43,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-22 13:58:43,406 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:58:43,407 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2021-12-22 13:58:43,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 13:58:43,407 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:58:43,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:58:43,407 INFO L85 PathProgramCache]: Analyzing trace with hash 852132828, now seen corresponding path program 1 times [2021-12-22 13:58:43,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:58:43,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899154714] [2021-12-22 13:58:43,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:58:43,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:58:43,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:43,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 13:58:43,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:43,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 13:58:43,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:43,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 13:58:43,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:43,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 13:58:43,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:43,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-22 13:58:43,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:43,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-22 13:58:43,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:43,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-22 13:58:43,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:43,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 13:58:43,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:43,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-22 13:58:43,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:43,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-22 13:58:43,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:43,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-22 13:58:43,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:43,689 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-22 13:58:43,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:58:43,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899154714] [2021-12-22 13:58:43,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899154714] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:58:43,689 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:58:43,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 13:58:43,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538623293] [2021-12-22 13:58:43,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:58:43,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 13:58:43,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:58:43,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 13:58:43,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-12-22 13:58:43,691 INFO L87 Difference]: Start difference. First operand 127 states and 182 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-22 13:58:44,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:58:44,019 INFO L93 Difference]: Finished difference Result 225 states and 333 transitions. [2021-12-22 13:58:44,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 13:58:44,020 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 93 [2021-12-22 13:58:44,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:58:44,021 INFO L225 Difference]: With dead ends: 225 [2021-12-22 13:58:44,021 INFO L226 Difference]: Without dead ends: 148 [2021-12-22 13:58:44,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:58:44,022 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 36 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 13:58:44,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 660 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 13:58:44,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-12-22 13:58:44,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 134. [2021-12-22 13:58:44,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 82 states have (on average 1.170731707317073) internal successors, (96), 86 states have internal predecessors, (96), 41 states have call successors, (41), 9 states have call predecessors, (41), 10 states have return successors, (58), 38 states have call predecessors, (58), 39 states have call successors, (58) [2021-12-22 13:58:44,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 195 transitions. [2021-12-22 13:58:44,037 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 195 transitions. Word has length 93 [2021-12-22 13:58:44,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:58:44,038 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 195 transitions. [2021-12-22 13:58:44,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-22 13:58:44,038 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 195 transitions. [2021-12-22 13:58:44,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-22 13:58:44,039 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:58:44,039 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:58:44,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 13:58:44,040 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:58:44,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:58:44,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1211514462, now seen corresponding path program 1 times [2021-12-22 13:58:44,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:58:44,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630475219] [2021-12-22 13:58:44,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:58:44,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:58:44,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:44,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 13:58:44,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:44,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 13:58:44,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:44,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 13:58:44,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:44,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 13:58:44,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:44,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-22 13:58:44,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:44,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-22 13:58:44,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:44,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-22 13:58:44,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:44,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 13:58:44,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:44,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-22 13:58:44,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:44,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-22 13:58:44,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:44,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-22 13:58:44,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:44,203 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-22 13:58:44,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:58:44,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630475219] [2021-12-22 13:58:44,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630475219] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:58:44,205 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:58:44,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 13:58:44,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162177526] [2021-12-22 13:58:44,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:58:44,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:58:44,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:58:44,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:58:44,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 13:58:44,206 INFO L87 Difference]: Start difference. First operand 134 states and 195 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-22 13:58:44,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:58:44,220 INFO L93 Difference]: Finished difference Result 223 states and 324 transitions. [2021-12-22 13:58:44,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:58:44,220 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 96 [2021-12-22 13:58:44,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:58:44,223 INFO L225 Difference]: With dead ends: 223 [2021-12-22 13:58:44,223 INFO L226 Difference]: Without dead ends: 135 [2021-12-22 13:58:44,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 13:58:44,224 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 0 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:58:44,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 301 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:58:44,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-12-22 13:58:44,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2021-12-22 13:58:44,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 83 states have (on average 1.1566265060240963) internal successors, (96), 87 states have internal predecessors, (96), 41 states have call successors, (41), 9 states have call predecessors, (41), 10 states have return successors, (58), 38 states have call predecessors, (58), 39 states have call successors, (58) [2021-12-22 13:58:44,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 195 transitions. [2021-12-22 13:58:44,236 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 195 transitions. Word has length 96 [2021-12-22 13:58:44,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:58:44,237 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 195 transitions. [2021-12-22 13:58:44,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-22 13:58:44,237 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 195 transitions. [2021-12-22 13:58:44,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-22 13:58:44,238 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:58:44,239 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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, 1] [2021-12-22 13:58:44,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 13:58:44,239 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:58:44,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:58:44,239 INFO L85 PathProgramCache]: Analyzing trace with hash -247569564, now seen corresponding path program 1 times [2021-12-22 13:58:44,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:58:44,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729128219] [2021-12-22 13:58:44,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:58:44,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:58:44,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:44,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 13:58:44,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:44,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 13:58:44,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:44,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 13:58:44,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:44,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 13:58:44,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:44,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-22 13:58:44,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:44,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-22 13:58:44,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:44,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-22 13:58:44,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:44,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 13:58:44,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:44,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-22 13:58:44,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:44,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-22 13:58:44,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:44,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-22 13:58:44,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:44,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-22 13:58:44,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:44,523 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-22 13:58:44,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:58:44,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729128219] [2021-12-22 13:58:44,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729128219] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:58:44,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283273666] [2021-12-22 13:58:44,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:58:44,523 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:58:44,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:58:44,524 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) [2021-12-22 13:58:44,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 13:58:44,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:44,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 2612 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-22 13:58:44,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:58:45,871 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 37 proven. 16 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-22 13:58:45,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:58:46,227 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2021-12-22 13:58:46,268 INFO L353 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-12-22 13:58:46,268 INFO L387 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 [2021-12-22 13:58:46,295 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-22 13:58:46,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283273666] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:58:46,296 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:58:46,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 14, 12] total 24 [2021-12-22 13:58:46,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434724236] [2021-12-22 13:58:46,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:58:46,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-22 13:58:46,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:58:46,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-22 13:58:46,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-12-22 13:58:46,297 INFO L87 Difference]: Start difference. First operand 135 states and 195 transitions. Second operand has 24 states, 24 states have (on average 4.583333333333333) internal successors, (110), 22 states have internal predecessors, (110), 9 states have call successors, (35), 5 states have call predecessors, (35), 5 states have return successors, (32), 9 states have call predecessors, (32), 9 states have call successors, (32) [2021-12-22 13:58:47,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:58:47,949 INFO L93 Difference]: Finished difference Result 361 states and 544 transitions. [2021-12-22 13:58:47,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-22 13:58:47,950 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.583333333333333) internal successors, (110), 22 states have internal predecessors, (110), 9 states have call successors, (35), 5 states have call predecessors, (35), 5 states have return successors, (32), 9 states have call predecessors, (32), 9 states have call successors, (32) Word has length 99 [2021-12-22 13:58:47,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:58:47,951 INFO L225 Difference]: With dead ends: 361 [2021-12-22 13:58:47,952 INFO L226 Difference]: Without dead ends: 258 [2021-12-22 13:58:47,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 191 SyntacticMatches, 23 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=238, Invalid=1742, Unknown=0, NotChecked=0, Total=1980 [2021-12-22 13:58:47,953 INFO L933 BasicCegarLoop]: 217 mSDtfsCounter, 133 mSDsluCounter, 2234 mSDsCounter, 0 mSdLazyCounter, 1824 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 2451 SdHoareTripleChecker+Invalid, 2065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 212 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-22 13:58:47,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 2451 Invalid, 2065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1824 Invalid, 0 Unknown, 212 Unchecked, 1.2s Time] [2021-12-22 13:58:47,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-12-22 13:58:47,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 202. [2021-12-22 13:58:47,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 125 states have (on average 1.136) internal successors, (142), 129 states have internal predecessors, (142), 62 states have call successors, (62), 13 states have call predecessors, (62), 14 states have return successors, (84), 59 states have call predecessors, (84), 60 states have call successors, (84) [2021-12-22 13:58:47,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 288 transitions. [2021-12-22 13:58:47,968 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 288 transitions. Word has length 99 [2021-12-22 13:58:47,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:58:47,968 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 288 transitions. [2021-12-22 13:58:47,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.583333333333333) internal successors, (110), 22 states have internal predecessors, (110), 9 states have call successors, (35), 5 states have call predecessors, (35), 5 states have return successors, (32), 9 states have call predecessors, (32), 9 states have call successors, (32) [2021-12-22 13:58:47,969 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 288 transitions. [2021-12-22 13:58:47,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-22 13:58:47,970 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:58:47,970 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 4, 4, 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, 1, 1, 1] [2021-12-22 13:58:48,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-22 13:58:48,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:58:48,175 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:58:48,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:58:48,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1338258892, now seen corresponding path program 1 times [2021-12-22 13:58:48,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:58:48,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177882121] [2021-12-22 13:58:48,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:58:48,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:58:48,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:48,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 13:58:48,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:48,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 13:58:48,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:48,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 13:58:48,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:48,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-22 13:58:48,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:48,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-22 13:58:48,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:48,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-22 13:58:48,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:48,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-22 13:58:48,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:48,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-22 13:58:48,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:48,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-22 13:58:48,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:48,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-22 13:58:48,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:48,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-22 13:58:48,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:48,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-22 13:58:48,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:48,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-22 13:58:48,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:48,362 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-12-22 13:58:48,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:58:48,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177882121] [2021-12-22 13:58:48,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177882121] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:58:48,362 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:58:48,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 13:58:48,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516720296] [2021-12-22 13:58:48,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:58:48,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 13:58:48,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:58:48,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 13:58:48,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 13:58:48,364 INFO L87 Difference]: Start difference. First operand 202 states and 288 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-22 13:58:48,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:58:48,404 INFO L93 Difference]: Finished difference Result 280 states and 398 transitions. [2021-12-22 13:58:48,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 13:58:48,405 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) Word has length 105 [2021-12-22 13:58:48,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:58:48,406 INFO L225 Difference]: With dead ends: 280 [2021-12-22 13:58:48,406 INFO L226 Difference]: Without dead ends: 202 [2021-12-22 13:58:48,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 13:58:48,408 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 18 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:58:48,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 523 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:58:48,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-12-22 13:58:48,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2021-12-22 13:58:48,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 125 states have (on average 1.136) internal successors, (142), 129 states have internal predecessors, (142), 62 states have call successors, (62), 13 states have call predecessors, (62), 14 states have return successors, (81), 59 states have call predecessors, (81), 60 states have call successors, (81) [2021-12-22 13:58:48,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 285 transitions. [2021-12-22 13:58:48,423 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 285 transitions. Word has length 105 [2021-12-22 13:58:48,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:58:48,424 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 285 transitions. [2021-12-22 13:58:48,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-22 13:58:48,424 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 285 transitions. [2021-12-22 13:58:48,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-22 13:58:48,426 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:58:48,426 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:58:48,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 13:58:48,426 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:58:48,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:58:48,427 INFO L85 PathProgramCache]: Analyzing trace with hash 762751521, now seen corresponding path program 1 times [2021-12-22 13:58:48,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:58:48,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429113425] [2021-12-22 13:58:48,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:58:48,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:58:48,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:48,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 13:58:48,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:48,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 13:58:48,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:48,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 13:58:48,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:48,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 13:58:48,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:48,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-22 13:58:48,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:48,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-22 13:58:48,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:48,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-22 13:58:48,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:48,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 13:58:48,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:48,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-22 13:58:48,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:48,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-22 13:58:48,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:48,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-22 13:58:48,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:48,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-22 13:58:48,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:48,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-22 13:58:48,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:48,620 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-12-22 13:58:48,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:58:48,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429113425] [2021-12-22 13:58:48,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429113425] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:58:48,620 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:58:48,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 13:58:48,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435862223] [2021-12-22 13:58:48,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:58:48,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 13:58:48,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:58:48,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 13:58:48,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:58:48,622 INFO L87 Difference]: Start difference. First operand 202 states and 285 transitions. Second operand has 8 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-12-22 13:58:48,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:58:48,689 INFO L93 Difference]: Finished difference Result 210 states and 293 transitions. [2021-12-22 13:58:48,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 13:58:48,689 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 103 [2021-12-22 13:58:48,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:58:48,690 INFO L225 Difference]: With dead ends: 210 [2021-12-22 13:58:48,690 INFO L226 Difference]: Without dead ends: 208 [2021-12-22 13:58:48,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:58:48,691 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 16 mSDsluCounter, 922 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 1082 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:58:48,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 1082 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:58:48,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-12-22 13:58:48,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 207. [2021-12-22 13:58:48,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 128 states have (on average 1.1328125) internal successors, (145), 132 states have internal predecessors, (145), 63 states have call successors, (63), 14 states have call predecessors, (63), 15 states have return successors, (82), 60 states have call predecessors, (82), 61 states have call successors, (82) [2021-12-22 13:58:48,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 290 transitions. [2021-12-22 13:58:48,702 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 290 transitions. Word has length 103 [2021-12-22 13:58:48,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:58:48,703 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 290 transitions. [2021-12-22 13:58:48,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-12-22 13:58:48,703 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 290 transitions. [2021-12-22 13:58:48,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-22 13:58:48,704 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:58:48,704 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 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] [2021-12-22 13:58:48,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 13:58:48,704 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:58:48,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:58:48,705 INFO L85 PathProgramCache]: Analyzing trace with hash -912199724, now seen corresponding path program 2 times [2021-12-22 13:58:48,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:58:48,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924068810] [2021-12-22 13:58:48,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:58:48,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:58:48,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:48,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 13:58:48,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:48,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 13:58:48,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:48,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 13:58:48,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:48,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-22 13:58:48,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:48,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-22 13:58:48,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:48,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-22 13:58:48,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:48,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-22 13:58:48,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:48,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-22 13:58:48,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:48,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-22 13:58:48,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:48,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-22 13:58:48,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:48,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-22 13:58:48,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:48,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-22 13:58:48,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:48,929 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 3 proven. 26 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-12-22 13:58:48,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:58:48,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924068810] [2021-12-22 13:58:48,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924068810] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:58:48,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856183545] [2021-12-22 13:58:48,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 13:58:48,930 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:58:48,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:58:48,931 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) [2021-12-22 13:58:48,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 13:58:49,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 13:58:49,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:58:49,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 2636 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-22 13:58:49,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:58:50,296 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 75 proven. 4 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-22 13:58:50,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:58:50,628 INFO L353 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-12-22 13:58:50,628 INFO L387 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 20 treesize of output 19 [2021-12-22 13:58:50,649 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-12-22 13:58:50,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856183545] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:58:50,649 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:58:50,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 10] total 25 [2021-12-22 13:58:50,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699679377] [2021-12-22 13:58:50,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:58:50,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-22 13:58:50,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:58:50,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-22 13:58:50,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-12-22 13:58:50,651 INFO L87 Difference]: Start difference. First operand 207 states and 290 transitions. Second operand has 25 states, 22 states have (on average 4.7272727272727275) internal successors, (104), 24 states have internal predecessors, (104), 8 states have call successors, (28), 3 states have call predecessors, (28), 8 states have return successors, (27), 6 states have call predecessors, (27), 8 states have call successors, (27) [2021-12-22 13:58:52,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:58:52,273 INFO L93 Difference]: Finished difference Result 400 states and 590 transitions. [2021-12-22 13:58:52,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-22 13:58:52,274 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 4.7272727272727275) internal successors, (104), 24 states have internal predecessors, (104), 8 states have call successors, (28), 3 states have call predecessors, (28), 8 states have return successors, (27), 6 states have call predecessors, (27), 8 states have call successors, (27) Word has length 107 [2021-12-22 13:58:52,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:58:52,276 INFO L225 Difference]: With dead ends: 400 [2021-12-22 13:58:52,276 INFO L226 Difference]: Without dead ends: 269 [2021-12-22 13:58:52,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 223 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=290, Invalid=2062, Unknown=0, NotChecked=0, Total=2352 [2021-12-22 13:58:52,277 INFO L933 BasicCegarLoop]: 168 mSDtfsCounter, 130 mSDsluCounter, 2232 mSDsCounter, 0 mSdLazyCounter, 2007 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 2400 SdHoareTripleChecker+Invalid, 2329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 2007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 240 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:58:52,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 2400 Invalid, 2329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 2007 Invalid, 0 Unknown, 240 Unchecked, 1.1s Time] [2021-12-22 13:58:52,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-12-22 13:58:52,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 221. [2021-12-22 13:58:52,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 139 states have (on average 1.1223021582733812) internal successors, (156), 144 states have internal predecessors, (156), 64 states have call successors, (64), 16 states have call predecessors, (64), 17 states have return successors, (95), 60 states have call predecessors, (95), 62 states have call successors, (95) [2021-12-22 13:58:52,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 315 transitions. [2021-12-22 13:58:52,298 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 315 transitions. Word has length 107 [2021-12-22 13:58:52,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:58:52,299 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 315 transitions. [2021-12-22 13:58:52,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 4.7272727272727275) internal successors, (104), 24 states have internal predecessors, (104), 8 states have call successors, (28), 3 states have call predecessors, (28), 8 states have return successors, (27), 6 states have call predecessors, (27), 8 states have call successors, (27) [2021-12-22 13:58:52,299 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 315 transitions. [2021-12-22 13:58:52,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-22 13:58:52,300 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:58:52,300 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 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, 1, 1, 1, 1, 1] [2021-12-22 13:58:52,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-22 13:58:52,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-22 13:58:52,516 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:58:52,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:58:52,516 INFO L85 PathProgramCache]: Analyzing trace with hash 411830111, now seen corresponding path program 1 times [2021-12-22 13:58:52,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:58:52,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493003741] [2021-12-22 13:58:52,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:58:52,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:58:52,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:52,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 13:58:52,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:52,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 13:58:52,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:52,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 13:58:52,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:52,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 13:58:52,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:52,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-22 13:58:52,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:52,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:58:52,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:52,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:58:52,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:52,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-22 13:58:52,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:52,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-22 13:58:52,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:52,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-22 13:58:52,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:52,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-22 13:58:52,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:52,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-22 13:58:52,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:52,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-22 13:58:52,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:52,802 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-12-22 13:58:52,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:58:52,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493003741] [2021-12-22 13:58:52,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493003741] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:58:52,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12173951] [2021-12-22 13:58:52,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:58:52,803 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:58:52,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:58:52,804 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) [2021-12-22 13:58:52,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-22 13:58:53,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:53,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 2669 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-22 13:58:53,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:58:53,390 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-12-22 13:58:53,390 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:58:53,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12173951] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:58:53,391 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:58:53,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 18 [2021-12-22 13:58:53,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637179806] [2021-12-22 13:58:53,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:58:53,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 13:58:53,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:58:53,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 13:58:53,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-12-22 13:58:53,392 INFO L87 Difference]: Start difference. First operand 221 states and 315 transitions. Second operand has 9 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 3 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-12-22 13:58:53,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:58:53,508 INFO L93 Difference]: Finished difference Result 358 states and 508 transitions. [2021-12-22 13:58:53,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 13:58:53,509 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 3 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 110 [2021-12-22 13:58:53,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:58:53,510 INFO L225 Difference]: With dead ends: 358 [2021-12-22 13:58:53,510 INFO L226 Difference]: Without dead ends: 221 [2021-12-22 13:58:53,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-12-22 13:58:53,512 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 12 mSDsluCounter, 988 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1136 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:58:53,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1136 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 13:58:53,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-12-22 13:58:53,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2021-12-22 13:58:53,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 139 states have (on average 1.1223021582733812) internal successors, (156), 144 states have internal predecessors, (156), 64 states have call successors, (64), 16 states have call predecessors, (64), 17 states have return successors, (93), 60 states have call predecessors, (93), 62 states have call successors, (93) [2021-12-22 13:58:53,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 313 transitions. [2021-12-22 13:58:53,525 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 313 transitions. Word has length 110 [2021-12-22 13:58:53,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:58:53,525 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 313 transitions. [2021-12-22 13:58:53,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 3 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-12-22 13:58:53,525 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 313 transitions. [2021-12-22 13:58:53,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-22 13:58:53,527 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:58:53,527 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 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, 1, 1, 1, 1, 1] [2021-12-22 13:58:53,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-22 13:58:53,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:58:53,748 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:58:53,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:58:53,748 INFO L85 PathProgramCache]: Analyzing trace with hash -712076360, now seen corresponding path program 1 times [2021-12-22 13:58:53,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:58:53,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281849749] [2021-12-22 13:58:53,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:58:53,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:58:53,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:53,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 13:58:53,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:53,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 13:58:53,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:53,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 13:58:53,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:53,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 13:58:53,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:53,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-22 13:58:53,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:53,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:58:53,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:53,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:58:53,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:53,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-22 13:58:53,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:53,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-22 13:58:53,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:54,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-22 13:58:54,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:54,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-22 13:58:54,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:54,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-22 13:58:54,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:54,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-22 13:58:54,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:54,081 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-12-22 13:58:54,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:58:54,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281849749] [2021-12-22 13:58:54,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281849749] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:58:54,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256748671] [2021-12-22 13:58:54,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:58:54,082 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:58:54,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:58:54,083 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) [2021-12-22 13:58:54,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-22 13:58:54,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:54,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 2679 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-22 13:58:54,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:58:54,617 INFO L387 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 27 treesize of output 15 [2021-12-22 13:58:54,751 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-12-22 13:58:54,752 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:58:54,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256748671] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:58:54,752 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:58:54,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 16 [2021-12-22 13:58:54,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515453602] [2021-12-22 13:58:54,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:58:54,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 13:58:54,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:58:54,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 13:58:54,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-12-22 13:58:54,753 INFO L87 Difference]: Start difference. First operand 221 states and 313 transitions. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 states have internal predecessors, (58), 3 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-12-22 13:58:55,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:58:55,223 INFO L93 Difference]: Finished difference Result 400 states and 602 transitions. [2021-12-22 13:58:55,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-22 13:58:55,224 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 states have internal predecessors, (58), 3 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 112 [2021-12-22 13:58:55,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:58:55,226 INFO L225 Difference]: With dead ends: 400 [2021-12-22 13:58:55,226 INFO L226 Difference]: Without dead ends: 272 [2021-12-22 13:58:55,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 131 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-12-22 13:58:55,227 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 110 mSDsluCounter, 749 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 899 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 13:58:55,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 899 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 429 Invalid, 0 Unknown, 78 Unchecked, 0.4s Time] [2021-12-22 13:58:55,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-12-22 13:58:55,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 225. [2021-12-22 13:58:55,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 142 states have (on average 1.1126760563380282) internal successors, (158), 147 states have internal predecessors, (158), 64 states have call successors, (64), 17 states have call predecessors, (64), 18 states have return successors, (93), 60 states have call predecessors, (93), 62 states have call successors, (93) [2021-12-22 13:58:55,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 315 transitions. [2021-12-22 13:58:55,243 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 315 transitions. Word has length 112 [2021-12-22 13:58:55,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:58:55,243 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 315 transitions. [2021-12-22 13:58:55,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 states have internal predecessors, (58), 3 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-12-22 13:58:55,244 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 315 transitions. [2021-12-22 13:58:55,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-12-22 13:58:55,245 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:58:55,245 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:58:55,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-22 13:58:55,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:58:55,455 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:58:55,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:58:55,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1160869054, now seen corresponding path program 1 times [2021-12-22 13:58:55,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:58:55,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679557232] [2021-12-22 13:58:55,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:58:55,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:58:55,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:55,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 13:58:55,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:55,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 13:58:55,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:55,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 13:58:55,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:55,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-22 13:58:55,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:55,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-22 13:58:55,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:55,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-22 13:58:55,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:55,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-22 13:58:55,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:55,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-22 13:58:55,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:55,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-22 13:58:55,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:55,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-22 13:58:55,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:55,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-22 13:58:55,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:55,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-22 13:58:55,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:55,695 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-12-22 13:58:55,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:58:55,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679557232] [2021-12-22 13:58:55,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679557232] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:58:55,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7616685] [2021-12-22 13:58:55,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:58:55,696 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:58:55,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:58:55,697 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) [2021-12-22 13:58:55,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-22 13:58:56,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:56,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 2668 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-22 13:58:56,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:58:56,719 INFO L387 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 25 treesize of output 17 [2021-12-22 13:58:56,721 INFO L387 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 21 treesize of output 13 [2021-12-22 13:58:56,723 INFO L387 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 18 treesize of output 10 [2021-12-22 13:58:56,823 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-22 13:58:56,824 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:58:56,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7616685] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:58:56,824 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:58:56,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [9] total 21 [2021-12-22 13:58:56,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771162081] [2021-12-22 13:58:56,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:58:56,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 13:58:56,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:58:56,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 13:58:56,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-12-22 13:58:56,825 INFO L87 Difference]: Start difference. First operand 225 states and 315 transitions. Second operand has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 12 states have internal predecessors, (61), 3 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-22 13:58:59,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:58:59,795 INFO L93 Difference]: Finished difference Result 442 states and 639 transitions. [2021-12-22 13:58:59,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-22 13:58:59,795 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 12 states have internal predecessors, (61), 3 states have call successors, (14), 3 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 115 [2021-12-22 13:58:59,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:58:59,797 INFO L225 Difference]: With dead ends: 442 [2021-12-22 13:58:59,797 INFO L226 Difference]: Without dead ends: 305 [2021-12-22 13:58:59,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=137, Invalid=674, Unknown=1, NotChecked=0, Total=812 [2021-12-22 13:58:59,799 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 117 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 811 SdHoareTripleChecker+Invalid, 934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-22 13:58:59,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 811 Invalid, 934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 723 Invalid, 0 Unknown, 165 Unchecked, 0.6s Time] [2021-12-22 13:58:59,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-12-22 13:58:59,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 262. [2021-12-22 13:58:59,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 173 states have (on average 1.115606936416185) internal successors, (193), 179 states have internal predecessors, (193), 65 states have call successors, (65), 20 states have call predecessors, (65), 23 states have return successors, (95), 62 states have call predecessors, (95), 63 states have call successors, (95) [2021-12-22 13:58:59,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 353 transitions. [2021-12-22 13:58:59,822 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 353 transitions. Word has length 115 [2021-12-22 13:58:59,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:58:59,822 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 353 transitions. [2021-12-22 13:58:59,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 12 states have internal predecessors, (61), 3 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-22 13:58:59,822 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 353 transitions. [2021-12-22 13:58:59,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-12-22 13:58:59,823 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:58:59,824 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] [2021-12-22 13:58:59,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-22 13:59:00,039 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,SelfDestructingSolverStorable13 [2021-12-22 13:59:00,039 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:59:00,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:59:00,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1782713024, now seen corresponding path program 1 times [2021-12-22 13:59:00,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:59:00,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184105406] [2021-12-22 13:59:00,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:59:00,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:59:00,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:00,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 13:59:00,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:00,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 13:59:00,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:00,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 13:59:00,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:00,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-22 13:59:00,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:00,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-22 13:59:00,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:00,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-22 13:59:00,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:00,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-22 13:59:00,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:00,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-22 13:59:00,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:00,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-22 13:59:00,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:00,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-22 13:59:00,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:00,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-22 13:59:00,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:00,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-22 13:59:00,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:00,152 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-12-22 13:59:00,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:59:00,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184105406] [2021-12-22 13:59:00,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184105406] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:59:00,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052659830] [2021-12-22 13:59:00,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:59:00,153 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:59:00,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:59:00,154 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) [2021-12-22 13:59:00,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-22 13:59:00,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:00,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 2663 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 13:59:00,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:59:00,652 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-22 13:59:00,653 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:59:00,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052659830] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:59:00,653 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:59:00,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2021-12-22 13:59:00,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334863241] [2021-12-22 13:59:00,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:59:00,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 13:59:00,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:59:00,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 13:59:00,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 13:59:00,654 INFO L87 Difference]: Start difference. First operand 262 states and 353 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (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) [2021-12-22 13:59:00,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:59:00,680 INFO L93 Difference]: Finished difference Result 422 states and 601 transitions. [2021-12-22 13:59:00,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 13:59:00,680 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (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 115 [2021-12-22 13:59:00,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:59:00,681 INFO L225 Difference]: With dead ends: 422 [2021-12-22 13:59:00,681 INFO L226 Difference]: Without dead ends: 251 [2021-12-22 13:59:00,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 13:59:00,684 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 6 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:59:00,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 456 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:59:00,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-12-22 13:59:00,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 245. [2021-12-22 13:59:00,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 160 states have (on average 1.10625) internal successors, (177), 166 states have internal predecessors, (177), 63 states have call successors, (63), 18 states have call predecessors, (63), 21 states have return successors, (91), 60 states have call predecessors, (91), 61 states have call successors, (91) [2021-12-22 13:59:00,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 331 transitions. [2021-12-22 13:59:00,700 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 331 transitions. Word has length 115 [2021-12-22 13:59:00,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:59:00,700 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 331 transitions. [2021-12-22 13:59:00,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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) [2021-12-22 13:59:00,700 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 331 transitions. [2021-12-22 13:59:00,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-22 13:59:00,701 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:59:00,701 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:59:00,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-22 13:59:00,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-22 13:59:00,919 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:59:00,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:59:00,920 INFO L85 PathProgramCache]: Analyzing trace with hash 929000903, now seen corresponding path program 2 times [2021-12-22 13:59:00,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:59:00,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111821818] [2021-12-22 13:59:00,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:59:00,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:59:01,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:01,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 13:59:01,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:01,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 13:59:01,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:01,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 13:59:01,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:01,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-22 13:59:01,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:01,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-22 13:59:01,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:01,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-22 13:59:01,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:01,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-22 13:59:01,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:01,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-22 13:59:01,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:01,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-22 13:59:01,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:01,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-22 13:59:01,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:01,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-22 13:59:01,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:01,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-22 13:59:01,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:01,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-22 13:59:01,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:01,221 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 18 proven. 21 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-12-22 13:59:01,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:59:01,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111821818] [2021-12-22 13:59:01,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111821818] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:59:01,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172218185] [2021-12-22 13:59:01,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 13:59:01,222 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:59:01,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:59:01,223 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) [2021-12-22 13:59:01,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-22 13:59:01,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 13:59:01,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:59:01,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 2701 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-22 13:59:01,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:59:02,050 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 114 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-22 13:59:02,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:59:02,324 INFO L353 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-12-22 13:59:02,324 INFO L387 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 [2021-12-22 13:59:02,379 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 18 proven. 22 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-22 13:59:02,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172218185] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:59:02,379 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:59:02,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 18 [2021-12-22 13:59:02,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811267683] [2021-12-22 13:59:02,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:59:02,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-22 13:59:02,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:59:02,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-22 13:59:02,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-12-22 13:59:02,381 INFO L87 Difference]: Start difference. First operand 245 states and 331 transitions. Second operand has 18 states, 17 states have (on average 6.0) internal successors, (102), 17 states have internal predecessors, (102), 4 states have call successors, (22), 4 states have call predecessors, (22), 6 states have return successors, (20), 3 states have call predecessors, (20), 4 states have call successors, (20) [2021-12-22 13:59:03,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:59:03,487 INFO L93 Difference]: Finished difference Result 496 states and 702 transitions. [2021-12-22 13:59:03,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-22 13:59:03,487 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 6.0) internal successors, (102), 17 states have internal predecessors, (102), 4 states have call successors, (22), 4 states have call predecessors, (22), 6 states have return successors, (20), 3 states have call predecessors, (20), 4 states have call successors, (20) Word has length 118 [2021-12-22 13:59:03,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:59:03,490 INFO L225 Difference]: With dead ends: 496 [2021-12-22 13:59:03,490 INFO L226 Difference]: Without dead ends: 365 [2021-12-22 13:59:03,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 247 SyntacticMatches, 14 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756 [2021-12-22 13:59:03,491 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 132 mSDsluCounter, 928 mSDsCounter, 0 mSdLazyCounter, 1084 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 1088 SdHoareTripleChecker+Invalid, 1343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1084 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 230 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-22 13:59:03,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 1088 Invalid, 1343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1084 Invalid, 0 Unknown, 230 Unchecked, 0.7s Time] [2021-12-22 13:59:03,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-12-22 13:59:03,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 342. [2021-12-22 13:59:03,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 220 states have (on average 1.1045454545454545) internal successors, (243), 225 states have internal predecessors, (243), 95 states have call successors, (95), 24 states have call predecessors, (95), 26 states have return successors, (136), 92 states have call predecessors, (136), 93 states have call successors, (136) [2021-12-22 13:59:03,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 474 transitions. [2021-12-22 13:59:03,514 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 474 transitions. Word has length 118 [2021-12-22 13:59:03,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:59:03,515 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 474 transitions. [2021-12-22 13:59:03,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 6.0) internal successors, (102), 17 states have internal predecessors, (102), 4 states have call successors, (22), 4 states have call predecessors, (22), 6 states have return successors, (20), 3 states have call predecessors, (20), 4 states have call successors, (20) [2021-12-22 13:59:03,515 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 474 transitions. [2021-12-22 13:59:03,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-12-22 13:59:03,516 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:59:03,517 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:59:03,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-22 13:59:03,731 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,SelfDestructingSolverStorable15 [2021-12-22 13:59:03,731 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:59:03,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:59:03,732 INFO L85 PathProgramCache]: Analyzing trace with hash -158853761, now seen corresponding path program 1 times [2021-12-22 13:59:03,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:59:03,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693412408] [2021-12-22 13:59:03,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:59:03,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:59:03,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:03,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 13:59:03,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:03,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 13:59:03,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:03,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 13:59:03,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:03,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-22 13:59:03,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:03,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-22 13:59:03,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:03,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-22 13:59:03,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:03,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-22 13:59:03,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:03,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-22 13:59:03,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:03,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-22 13:59:03,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:03,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-22 13:59:03,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:03,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-22 13:59:03,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:03,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-22 13:59:03,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:03,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-22 13:59:03,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:03,951 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2021-12-22 13:59:03,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:59:03,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693412408] [2021-12-22 13:59:03,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693412408] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:59:03,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173944705] [2021-12-22 13:59:03,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:59:03,953 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:59:03,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:59:03,954 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) [2021-12-22 13:59:03,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-22 13:59:04,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:04,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 2713 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-22 13:59:04,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:59:04,393 INFO L387 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 [2021-12-22 13:59:04,397 INFO L387 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 [2021-12-22 13:59:04,580 INFO L387 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 15 treesize of output 7 [2021-12-22 13:59:04,584 INFO L387 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 15 treesize of output 7 [2021-12-22 13:59:04,691 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-12-22 13:59:04,691 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:59:04,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173944705] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:59:04,691 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:59:04,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 15 [2021-12-22 13:59:04,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765985415] [2021-12-22 13:59:04,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:59:04,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 13:59:04,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:59:04,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 13:59:04,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-12-22 13:59:04,693 INFO L87 Difference]: Start difference. First operand 342 states and 474 transitions. Second operand has 8 states, 8 states have (on average 7.875) internal successors, (63), 8 states have internal predecessors, (63), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-12-22 13:59:04,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:59:04,867 INFO L93 Difference]: Finished difference Result 644 states and 948 transitions. [2021-12-22 13:59:04,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 13:59:04,867 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 8 states have internal predecessors, (63), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 122 [2021-12-22 13:59:04,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:59:04,869 INFO L225 Difference]: With dead ends: 644 [2021-12-22 13:59:04,870 INFO L226 Difference]: Without dead ends: 428 [2021-12-22 13:59:04,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 141 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-12-22 13:59:04,871 INFO L933 BasicCegarLoop]: 208 mSDtfsCounter, 91 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 823 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:59:04,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 823 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 109 Invalid, 0 Unknown, 43 Unchecked, 0.1s Time] [2021-12-22 13:59:04,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-12-22 13:59:04,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 352. [2021-12-22 13:59:04,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 228 states have (on average 1.1008771929824561) internal successors, (251), 234 states have internal predecessors, (251), 96 states have call successors, (96), 25 states have call predecessors, (96), 27 states have return successors, (137), 92 states have call predecessors, (137), 94 states have call successors, (137) [2021-12-22 13:59:04,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 484 transitions. [2021-12-22 13:59:04,893 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 484 transitions. Word has length 122 [2021-12-22 13:59:04,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:59:04,894 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 484 transitions. [2021-12-22 13:59:04,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 8 states have internal predecessors, (63), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-12-22 13:59:04,894 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 484 transitions. [2021-12-22 13:59:04,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-12-22 13:59:04,895 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:59:04,895 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:59:04,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-22 13:59:05,109 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,SelfDestructingSolverStorable16 [2021-12-22 13:59:05,109 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:59:05,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:59:05,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1460715489, now seen corresponding path program 1 times [2021-12-22 13:59:05,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:59:05,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441995818] [2021-12-22 13:59:05,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:59:05,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:59:05,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:05,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 13:59:05,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:05,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 13:59:05,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:05,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-22 13:59:05,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:05,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:59:05,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:05,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-22 13:59:05,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:05,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-22 13:59:05,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:05,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-22 13:59:05,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:05,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-22 13:59:05,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:05,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-22 13:59:05,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:05,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-22 13:59:05,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:05,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-22 13:59:05,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:05,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-22 13:59:05,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:05,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-22 13:59:05,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:05,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-22 13:59:05,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:05,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-22 13:59:05,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:05,349 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 17 proven. 19 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-12-22 13:59:05,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:59:05,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441995818] [2021-12-22 13:59:05,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441995818] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:59:05,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879220142] [2021-12-22 13:59:05,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:59:05,350 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:59:05,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:59:05,351 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) [2021-12-22 13:59:05,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-22 13:59:05,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:05,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 2750 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-22 13:59:05,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:59:05,911 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-22 13:59:05,911 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:59:05,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879220142] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:59:05,911 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:59:05,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 11 [2021-12-22 13:59:05,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401086359] [2021-12-22 13:59:05,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:59:05,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 13:59:05,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:59:05,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 13:59:05,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:59:05,912 INFO L87 Difference]: Start difference. First operand 352 states and 484 transitions. Second operand has 9 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-12-22 13:59:06,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:59:06,039 INFO L93 Difference]: Finished difference Result 530 states and 729 transitions. [2021-12-22 13:59:06,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 13:59:06,040 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 133 [2021-12-22 13:59:06,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:59:06,042 INFO L225 Difference]: With dead ends: 530 [2021-12-22 13:59:06,043 INFO L226 Difference]: Without dead ends: 329 [2021-12-22 13:59:06,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 161 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-12-22 13:59:06,044 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 12 mSDsluCounter, 994 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1144 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:59:06,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1144 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 13:59:06,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-12-22 13:59:06,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 317. [2021-12-22 13:59:06,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 207 states have (on average 1.1014492753623188) internal successors, (228), 213 states have internal predecessors, (228), 84 states have call successors, (84), 24 states have call predecessors, (84), 25 states have return successors, (119), 79 states have call predecessors, (119), 82 states have call successors, (119) [2021-12-22 13:59:06,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 431 transitions. [2021-12-22 13:59:06,065 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 431 transitions. Word has length 133 [2021-12-22 13:59:06,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:59:06,065 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 431 transitions. [2021-12-22 13:59:06,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-12-22 13:59:06,066 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 431 transitions. [2021-12-22 13:59:06,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-22 13:59:06,069 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:59:06,069 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:59:06,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-22 13:59:06,287 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,SelfDestructingSolverStorable17 [2021-12-22 13:59:06,287 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:59:06,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:59:06,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1001276614, now seen corresponding path program 2 times [2021-12-22 13:59:06,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:59:06,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005662973] [2021-12-22 13:59:06,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:59:06,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:59:06,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:06,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 13:59:06,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:06,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 13:59:06,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:06,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-22 13:59:06,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:06,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:59:06,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:06,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-22 13:59:06,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:06,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-22 13:59:06,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:06,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-22 13:59:06,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:06,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-22 13:59:06,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:06,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-22 13:59:06,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:06,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-22 13:59:06,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:06,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-22 13:59:06,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:06,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-22 13:59:06,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:06,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-22 13:59:06,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:06,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-22 13:59:06,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:06,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-22 13:59:06,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:06,906 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-12-22 13:59:06,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:59:06,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005662973] [2021-12-22 13:59:06,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005662973] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:59:06,906 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:59:06,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-22 13:59:06,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846701597] [2021-12-22 13:59:06,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:59:06,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-22 13:59:06,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:59:06,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-22 13:59:06,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-12-22 13:59:06,907 INFO L87 Difference]: Start difference. First operand 317 states and 431 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 16 states have internal predecessors, (58), 8 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (15), 9 states have call predecessors, (15), 7 states have call successors, (15) [2021-12-22 13:59:08,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:59:08,088 INFO L93 Difference]: Finished difference Result 533 states and 802 transitions. [2021-12-22 13:59:08,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-22 13:59:08,089 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 16 states have internal predecessors, (58), 8 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (15), 9 states have call predecessors, (15), 7 states have call successors, (15) Word has length 135 [2021-12-22 13:59:08,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:59:08,092 INFO L225 Difference]: With dead ends: 533 [2021-12-22 13:59:08,092 INFO L226 Difference]: Without dead ends: 444 [2021-12-22 13:59:08,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2021-12-22 13:59:08,093 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 166 mSDsluCounter, 866 mSDsCounter, 0 mSdLazyCounter, 1975 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 1042 SdHoareTripleChecker+Invalid, 2130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 1975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:59:08,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 1042 Invalid, 2130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 1975 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-22 13:59:08,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-12-22 13:59:08,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 427. [2021-12-22 13:59:08,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 265 states have (on average 1.0981132075471698) internal successors, (291), 274 states have internal predecessors, (291), 131 states have call successors, (131), 26 states have call predecessors, (131), 30 states have return successors, (213), 126 states have call predecessors, (213), 129 states have call successors, (213) [2021-12-22 13:59:08,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 635 transitions. [2021-12-22 13:59:08,133 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 635 transitions. Word has length 135 [2021-12-22 13:59:08,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:59:08,135 INFO L470 AbstractCegarLoop]: Abstraction has 427 states and 635 transitions. [2021-12-22 13:59:08,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 16 states have internal predecessors, (58), 8 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (15), 9 states have call predecessors, (15), 7 states have call successors, (15) [2021-12-22 13:59:08,135 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 635 transitions. [2021-12-22 13:59:08,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-22 13:59:08,137 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:59:08,137 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:59:08,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-22 13:59:08,137 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:59:08,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:59:08,138 INFO L85 PathProgramCache]: Analyzing trace with hash -743111176, now seen corresponding path program 1 times [2021-12-22 13:59:08,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:59:08,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325879824] [2021-12-22 13:59:08,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:59:08,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:59:08,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:08,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 13:59:08,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:08,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 13:59:08,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:08,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-22 13:59:08,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:08,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:59:08,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:08,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-22 13:59:08,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:08,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-22 13:59:08,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:08,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-22 13:59:08,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:08,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-22 13:59:08,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:08,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-22 13:59:08,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:08,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-22 13:59:08,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:08,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-22 13:59:08,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:08,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-22 13:59:08,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:08,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-22 13:59:08,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:08,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-22 13:59:08,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:08,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-22 13:59:08,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:08,340 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2021-12-22 13:59:08,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:59:08,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325879824] [2021-12-22 13:59:08,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325879824] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:59:08,340 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:59:08,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 13:59:08,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438280443] [2021-12-22 13:59:08,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:59:08,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 13:59:08,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:59:08,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 13:59:08,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 13:59:08,342 INFO L87 Difference]: Start difference. First operand 427 states and 635 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-12-22 13:59:08,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:59:08,545 INFO L93 Difference]: Finished difference Result 593 states and 924 transitions. [2021-12-22 13:59:08,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 13:59:08,545 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) Word has length 135 [2021-12-22 13:59:08,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:59:08,549 INFO L225 Difference]: With dead ends: 593 [2021-12-22 13:59:08,549 INFO L226 Difference]: Without dead ends: 418 [2021-12-22 13:59:08,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:59:08,552 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 44 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 13:59:08,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 389 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 13:59:08,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-12-22 13:59:08,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 418. [2021-12-22 13:59:08,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 257 states have (on average 1.093385214007782) internal successors, (281), 265 states have internal predecessors, (281), 131 states have call successors, (131), 26 states have call predecessors, (131), 29 states have return successors, (192), 126 states have call predecessors, (192), 129 states have call successors, (192) [2021-12-22 13:59:08,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 604 transitions. [2021-12-22 13:59:08,607 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 604 transitions. Word has length 135 [2021-12-22 13:59:08,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:59:08,607 INFO L470 AbstractCegarLoop]: Abstraction has 418 states and 604 transitions. [2021-12-22 13:59:08,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-12-22 13:59:08,607 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 604 transitions. [2021-12-22 13:59:08,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-12-22 13:59:08,610 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:59:08,610 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 5, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:59:08,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-22 13:59:08,610 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:59:08,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:59:08,610 INFO L85 PathProgramCache]: Analyzing trace with hash 2134105364, now seen corresponding path program 1 times [2021-12-22 13:59:08,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:59:08,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111938576] [2021-12-22 13:59:08,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:59:08,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:59:08,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:08,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 13:59:08,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:08,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 13:59:08,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:08,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 13:59:08,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:08,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 13:59:08,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:08,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-22 13:59:08,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:08,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-22 13:59:08,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:08,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-22 13:59:08,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:08,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-22 13:59:08,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:08,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:59:08,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:08,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 13:59:08,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:08,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 13:59:08,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:08,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 13:59:08,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:08,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-22 13:59:08,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:08,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-22 13:59:08,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:08,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-22 13:59:08,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:08,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-22 13:59:08,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:08,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-22 13:59:08,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:08,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-22 13:59:08,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:08,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2021-12-22 13:59:08,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:08,785 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 24 proven. 4 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2021-12-22 13:59:08,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:59:08,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111938576] [2021-12-22 13:59:08,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111938576] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:59:08,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247961233] [2021-12-22 13:59:08,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:59:08,785 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:59:08,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:59:08,786 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) [2021-12-22 13:59:08,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-22 13:59:09,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:09,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 2739 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-22 13:59:09,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:59:09,359 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 94 proven. 84 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-12-22 13:59:09,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:59:09,593 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 24 proven. 4 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2021-12-22 13:59:09,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247961233] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:59:09,593 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:59:09,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2021-12-22 13:59:09,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222788572] [2021-12-22 13:59:09,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:59:09,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-22 13:59:09,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:59:09,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-22 13:59:09,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-12-22 13:59:09,595 INFO L87 Difference]: Start difference. First operand 418 states and 604 transitions. Second operand has 15 states, 12 states have (on average 8.166666666666666) internal successors, (98), 14 states have internal predecessors, (98), 10 states have call successors, (41), 4 states have call predecessors, (41), 5 states have return successors, (40), 7 states have call predecessors, (40), 10 states have call successors, (40) [2021-12-22 13:59:09,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:59:09,958 INFO L93 Difference]: Finished difference Result 560 states and 829 transitions. [2021-12-22 13:59:09,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 13:59:09,959 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 8.166666666666666) internal successors, (98), 14 states have internal predecessors, (98), 10 states have call successors, (41), 4 states have call predecessors, (41), 5 states have return successors, (40), 7 states have call predecessors, (40), 10 states have call successors, (40) Word has length 139 [2021-12-22 13:59:09,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:59:09,961 INFO L225 Difference]: With dead ends: 560 [2021-12-22 13:59:09,961 INFO L226 Difference]: Without dead ends: 418 [2021-12-22 13:59:09,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 308 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-12-22 13:59:09,962 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 212 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 13:59:09,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 454 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 13:59:09,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-12-22 13:59:09,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 418. [2021-12-22 13:59:09,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 257 states have (on average 1.093385214007782) internal successors, (281), 265 states have internal predecessors, (281), 131 states have call successors, (131), 26 states have call predecessors, (131), 29 states have return successors, (184), 126 states have call predecessors, (184), 129 states have call successors, (184) [2021-12-22 13:59:09,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 596 transitions. [2021-12-22 13:59:09,993 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 596 transitions. Word has length 139 [2021-12-22 13:59:09,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:59:09,994 INFO L470 AbstractCegarLoop]: Abstraction has 418 states and 596 transitions. [2021-12-22 13:59:09,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 8.166666666666666) internal successors, (98), 14 states have internal predecessors, (98), 10 states have call successors, (41), 4 states have call predecessors, (41), 5 states have return successors, (40), 7 states have call predecessors, (40), 10 states have call successors, (40) [2021-12-22 13:59:09,994 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 596 transitions. [2021-12-22 13:59:09,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-12-22 13:59:09,995 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:59:09,996 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:59:10,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-22 13:59:10,216 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,SelfDestructingSolverStorable20 [2021-12-22 13:59:10,216 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:59:10,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:59:10,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1988577793, now seen corresponding path program 1 times [2021-12-22 13:59:10,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:59:10,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495422449] [2021-12-22 13:59:10,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:59:10,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:59:10,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:10,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 13:59:10,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:10,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 13:59:10,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:10,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-22 13:59:10,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:10,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:59:10,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:10,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-22 13:59:10,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:10,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-22 13:59:10,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:10,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-22 13:59:10,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:10,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-22 13:59:10,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:10,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-22 13:59:10,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:10,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-22 13:59:10,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:10,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-22 13:59:10,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:10,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-22 13:59:10,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:10,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-22 13:59:10,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:10,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-22 13:59:10,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:10,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-22 13:59:10,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:10,447 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2021-12-22 13:59:10,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:59:10,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495422449] [2021-12-22 13:59:10,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495422449] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:59:10,448 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:59:10,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-22 13:59:10,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358633572] [2021-12-22 13:59:10,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:59:10,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 13:59:10,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:59:10,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 13:59:10,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-12-22 13:59:10,450 INFO L87 Difference]: Start difference. First operand 418 states and 596 transitions. Second operand has 14 states, 13 states have (on average 4.384615384615385) internal successors, (57), 11 states have internal predecessors, (57), 2 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-12-22 13:59:10,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:59:10,972 INFO L93 Difference]: Finished difference Result 426 states and 604 transitions. [2021-12-22 13:59:10,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-22 13:59:10,973 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.384615384615385) internal successors, (57), 11 states have internal predecessors, (57), 2 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) Word has length 137 [2021-12-22 13:59:10,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:59:10,975 INFO L225 Difference]: With dead ends: 426 [2021-12-22 13:59:10,975 INFO L226 Difference]: Without dead ends: 424 [2021-12-22 13:59:10,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2021-12-22 13:59:10,977 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 74 mSDsluCounter, 1270 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 1422 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 13:59:10,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 1422 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 13:59:10,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-12-22 13:59:11,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 423. [2021-12-22 13:59:11,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 260 states have (on average 1.0923076923076922) internal successors, (284), 268 states have internal predecessors, (284), 132 states have call successors, (132), 27 states have call predecessors, (132), 30 states have return successors, (185), 127 states have call predecessors, (185), 130 states have call successors, (185) [2021-12-22 13:59:11,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 601 transitions. [2021-12-22 13:59:11,038 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 601 transitions. Word has length 137 [2021-12-22 13:59:11,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:59:11,039 INFO L470 AbstractCegarLoop]: Abstraction has 423 states and 601 transitions. [2021-12-22 13:59:11,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.384615384615385) internal successors, (57), 11 states have internal predecessors, (57), 2 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-12-22 13:59:11,039 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 601 transitions. [2021-12-22 13:59:11,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-12-22 13:59:11,041 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:59:11,041 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:59:11,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-22 13:59:11,041 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:59:11,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:59:11,041 INFO L85 PathProgramCache]: Analyzing trace with hash -32643708, now seen corresponding path program 1 times [2021-12-22 13:59:11,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:59:11,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104525821] [2021-12-22 13:59:11,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:59:11,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:59:11,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:11,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 13:59:11,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:11,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 13:59:11,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:11,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-22 13:59:11,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:11,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:59:11,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:11,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-22 13:59:11,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:11,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-22 13:59:11,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:11,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-22 13:59:11,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:11,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-22 13:59:11,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:11,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-22 13:59:11,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:11,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-22 13:59:11,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:11,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-22 13:59:11,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:11,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-22 13:59:11,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:11,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-22 13:59:11,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:11,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-22 13:59:11,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:11,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-22 13:59:11,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:11,748 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 30 proven. 3 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-12-22 13:59:11,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:59:11,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104525821] [2021-12-22 13:59:11,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104525821] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:59:11,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675153407] [2021-12-22 13:59:11,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:59:11,749 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:59:11,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:59:11,750 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) [2021-12-22 13:59:11,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-22 13:59:12,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:12,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 2795 conjuncts, 94 conjunts are in the unsatisfiable core [2021-12-22 13:59:12,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:59:12,126 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 13:59:12,286 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-22 13:59:12,286 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 12 treesize of output 14 [2021-12-22 13:59:12,362 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-22 13:59:12,640 INFO L353 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2021-12-22 13:59:12,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2021-12-22 13:59:12,680 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-12-22 13:59:16,763 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23