./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 4fce72e4c86270281dd05ead367908aebeea58cd11d1d4da51b0e6a5af67a67d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-16 20:30:25,165 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-16 20:30:25,167 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-16 20:30:25,190 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-16 20:30:25,193 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-16 20:30:25,196 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-16 20:30:25,198 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-16 20:30:25,201 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-16 20:30:25,203 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-16 20:30:25,207 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-16 20:30:25,208 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-16 20:30:25,209 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-16 20:30:25,209 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-16 20:30:25,212 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-16 20:30:25,214 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-16 20:30:25,216 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-16 20:30:25,217 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-16 20:30:25,218 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-16 20:30:25,221 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-16 20:30:25,226 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-16 20:30:25,227 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-16 20:30:25,228 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-16 20:30:25,229 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-16 20:30:25,230 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-16 20:30:25,233 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-16 20:30:25,233 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-16 20:30:25,234 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-16 20:30:25,235 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-16 20:30:25,235 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-16 20:30:25,236 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-16 20:30:25,236 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-16 20:30:25,237 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-16 20:30:25,238 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-16 20:30:25,239 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-16 20:30:25,240 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-16 20:30:25,240 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-16 20:30:25,240 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-16 20:30:25,240 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-16 20:30:25,241 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-16 20:30:25,241 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-16 20:30:25,242 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-16 20:30:25,242 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-16 20:30:25,264 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-16 20:30:25,265 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-16 20:30:25,266 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-16 20:30:25,266 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-16 20:30:25,267 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-16 20:30:25,267 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-16 20:30:25,267 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-16 20:30:25,267 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-16 20:30:25,267 INFO L138 SettingsManager]: * Use SBE=true [2021-11-16 20:30:25,268 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-16 20:30:25,268 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-16 20:30:25,268 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-16 20:30:25,268 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-16 20:30:25,268 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-16 20:30:25,268 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-16 20:30:25,268 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-16 20:30:25,268 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-16 20:30:25,269 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-16 20:30:25,269 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-16 20:30:25,269 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-16 20:30:25,269 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-16 20:30:25,269 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-16 20:30:25,269 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-16 20:30:25,269 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-16 20:30:25,270 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-16 20:30:25,270 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-16 20:30:25,270 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-16 20:30:25,270 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-16 20:30:25,270 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-16 20:30:25,270 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-16 20:30:25,275 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-16 20:30:25,275 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4fce72e4c86270281dd05ead367908aebeea58cd11d1d4da51b0e6a5af67a67d [2021-11-16 20:30:25,471 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-16 20:30:25,493 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-16 20:30:25,496 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-16 20:30:25,496 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-16 20:30:25,497 INFO L275 PluginConnector]: CDTParser initialized [2021-11-16 20:30:25,498 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i [2021-11-16 20:30:25,557 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2bd43f688/1ebf1fa49b804874921022e38c692b8f/FLAGeada76632 [2021-11-16 20:30:26,115 INFO L306 CDTParser]: Found 1 translation units. [2021-11-16 20:30:26,115 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i [2021-11-16 20:30:26,144 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2bd43f688/1ebf1fa49b804874921022e38c692b8f/FLAGeada76632 [2021-11-16 20:30:26,293 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2bd43f688/1ebf1fa49b804874921022e38c692b8f [2021-11-16 20:30:26,296 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-16 20:30:26,297 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-16 20:30:26,297 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-16 20:30:26,298 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-16 20:30:26,301 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-16 20:30:26,302 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:30:26" (1/1) ... [2021-11-16 20:30:26,303 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33bce0da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:30:26, skipping insertion in model container [2021-11-16 20:30:26,304 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:30:26" (1/1) ... [2021-11-16 20:30:26,308 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-16 20:30:26,375 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-16 20:30:26,541 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i[4503,4516] [2021-11-16 20:30:26,549 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i[4563,4576] [2021-11-16 20:30:26,579 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-16 20:30:26,587 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-16 20:30:27,232 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:30:27,238 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:30:27,239 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:30:27,239 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:30:27,240 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:30:27,247 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:30:27,251 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:30:27,252 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:30:27,259 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:30:27,475 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-16 20:30:27,476 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-16 20:30:27,476 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-16 20:30:27,477 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-16 20:30:27,478 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-16 20:30:27,478 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-16 20:30:27,478 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-16 20:30:27,479 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-16 20:30:27,479 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-16 20:30:27,479 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-16 20:30:27,567 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-16 20:30:27,573 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:30:27,573 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:30:27,614 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:30:27,614 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:30:27,645 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-16 20:30:27,688 INFO L203 MainTranslator]: Completed pre-run [2021-11-16 20:30:27,738 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i[4503,4516] [2021-11-16 20:30:27,739 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i[4563,4576] [2021-11-16 20:30:27,742 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-16 20:30:27,742 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-16 20:30:27,804 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:30:27,804 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:30:27,805 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:30:27,805 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:30:27,806 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:30:27,812 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:30:27,812 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:30:27,814 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:30:27,814 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:30:27,850 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-16 20:30:27,854 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-16 20:30:27,855 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-16 20:30:27,855 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-16 20:30:27,857 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-16 20:30:27,858 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-16 20:30:27,858 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-16 20:30:27,858 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-16 20:30:27,860 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-16 20:30:27,861 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-16 20:30:27,879 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-16 20:30:27,884 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:30:27,885 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:30:27,922 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:30:27,922 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:30:27,943 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-16 20:30:28,104 INFO L208 MainTranslator]: Completed translation [2021-11-16 20:30:28,105 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:30:28 WrapperNode [2021-11-16 20:30:28,105 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-16 20:30:28,106 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-16 20:30:28,106 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-16 20:30:28,106 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-16 20:30:28,112 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:30:28" (1/1) ... [2021-11-16 20:30:28,206 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:30:28" (1/1) ... [2021-11-16 20:30:28,271 INFO L137 Inliner]: procedures = 694, calls = 2502, calls flagged for inlining = 57, calls inlined = 12, statements flattened = 999 [2021-11-16 20:30:28,272 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-16 20:30:28,273 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-16 20:30:28,273 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-16 20:30:28,273 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-16 20:30:28,279 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:30:28" (1/1) ... [2021-11-16 20:30:28,280 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:30:28" (1/1) ... [2021-11-16 20:30:28,289 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:30:28" (1/1) ... [2021-11-16 20:30:28,290 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:30:28" (1/1) ... [2021-11-16 20:30:28,329 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:30:28" (1/1) ... [2021-11-16 20:30:28,354 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:30:28" (1/1) ... [2021-11-16 20:30:28,360 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:30:28" (1/1) ... [2021-11-16 20:30:28,366 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-16 20:30:28,367 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-16 20:30:28,367 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-16 20:30:28,367 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-16 20:30:28,380 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:30:28" (1/1) ... [2021-11-16 20:30:28,385 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-16 20:30:28,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:30:28,413 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) [2021-11-16 20:30:28,430 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 [2021-11-16 20:30:28,464 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2021-11-16 20:30:28,464 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2021-11-16 20:30:28,465 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-16 20:30:28,465 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-16 20:30:28,466 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-16 20:30:28,466 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-16 20:30:28,466 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2021-11-16 20:30:28,466 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2021-11-16 20:30:28,466 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-16 20:30:28,466 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-16 20:30:28,467 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-16 20:30:28,467 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-16 20:30:28,467 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-16 20:30:28,467 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-16 20:30:28,467 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-16 20:30:28,467 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-16 20:30:28,468 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-16 20:30:28,468 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_realloc [2021-11-16 20:30:28,468 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_realloc [2021-11-16 20:30:28,468 INFO L130 BoogieDeclarations]: Found specification of procedure __builtin_uaddl_overflow [2021-11-16 20:30:28,468 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_release [2021-11-16 20:30:28,468 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_release [2021-11-16 20:30:28,469 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-16 20:30:28,469 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-16 20:30:28,469 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-16 20:30:28,469 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_plus [2021-11-16 20:30:28,469 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_plus [2021-11-16 20:30:28,469 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-16 20:30:28,469 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-16 20:30:28,470 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-11-16 20:30:28,470 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-11-16 20:30:28,470 INFO L130 BoogieDeclarations]: Found specification of procedure aws_add_size_checked [2021-11-16 20:30:28,470 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_add_size_checked [2021-11-16 20:30:28,470 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-16 20:30:28,470 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-16 20:30:28,746 INFO L236 CfgBuilder]: Building ICFG [2021-11-16 20:30:28,748 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-16 20:30:29,443 INFO L277 CfgBuilder]: Performing block encoding [2021-11-16 20:30:29,451 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-16 20:30:29,452 INFO L301 CfgBuilder]: Removed 8 assume(true) statements. [2021-11-16 20:30:29,453 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:30:29 BoogieIcfgContainer [2021-11-16 20:30:29,453 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-16 20:30:29,454 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-16 20:30:29,454 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-16 20:30:29,457 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-16 20:30:29,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 08:30:26" (1/3) ... [2021-11-16 20:30:29,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b1ef44e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:30:29, skipping insertion in model container [2021-11-16 20:30:29,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:30:28" (2/3) ... [2021-11-16 20:30:29,460 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b1ef44e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:30:29, skipping insertion in model container [2021-11-16 20:30:29,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:30:29" (3/3) ... [2021-11-16 20:30:29,461 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_reserve_relative_harness.i [2021-11-16 20:30:29,465 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-16 20:30:29,466 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-16 20:30:29,511 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-16 20:30:29,524 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-16 20:30:29,524 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-16 20:30:29,547 INFO L276 IsEmpty]: Start isEmpty. Operand has 160 states, 111 states have (on average 1.3153153153153154) internal successors, (146), 110 states have internal predecessors, (146), 38 states have call successors, (38), 11 states have call predecessors, (38), 11 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2021-11-16 20:30:29,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-16 20:30:29,555 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:30:29,556 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:30:29,556 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:30:29,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:30:29,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1108355223, now seen corresponding path program 1 times [2021-11-16 20:30:29,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:30:29,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657904379] [2021-11-16 20:30:29,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:29,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:30:29,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:29,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:30:29,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:30,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 20:30:30,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:30,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:30:30,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:30,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-16 20:30:30,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:30,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 20:30:30,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:30,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-16 20:30:30,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:30,099 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-16 20:30:30,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:30:30,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657904379] [2021-11-16 20:30:30,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657904379] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:30:30,100 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:30:30,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-16 20:30:30,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767630323] [2021-11-16 20:30:30,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:30:30,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-16 20:30:30,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:30:30,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-16 20:30:30,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-16 20:30:30,130 INFO L87 Difference]: Start difference. First operand has 160 states, 111 states have (on average 1.3153153153153154) internal successors, (146), 110 states have internal predecessors, (146), 38 states have call successors, (38), 11 states have call predecessors, (38), 11 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 2 states have internal predecessors, (30), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-16 20:30:30,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:30:30,443 INFO L93 Difference]: Finished difference Result 320 states and 455 transitions. [2021-11-16 20:30:30,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-16 20:30:30,446 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 2 states have internal predecessors, (30), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 46 [2021-11-16 20:30:30,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:30:30,457 INFO L225 Difference]: With dead ends: 320 [2021-11-16 20:30:30,457 INFO L226 Difference]: Without dead ends: 165 [2021-11-16 20:30:30,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-16 20:30:30,469 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 122 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-16 20:30:30,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 340 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-16 20:30:30,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-11-16 20:30:30,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 155. [2021-11-16 20:30:30,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 105 states have (on average 1.2571428571428571) internal successors, (132), 106 states have internal predecessors, (132), 38 states have call successors, (38), 11 states have call predecessors, (38), 11 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2021-11-16 20:30:30,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 207 transitions. [2021-11-16 20:30:30,526 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 207 transitions. Word has length 46 [2021-11-16 20:30:30,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:30:30,527 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 207 transitions. [2021-11-16 20:30:30,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 2 states have internal predecessors, (30), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-16 20:30:30,528 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 207 transitions. [2021-11-16 20:30:30,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-16 20:30:30,531 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:30:30,532 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:30:30,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-16 20:30:30,532 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:30:30,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:30:30,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1165194515, now seen corresponding path program 1 times [2021-11-16 20:30:30,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:30:30,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194800439] [2021-11-16 20:30:30,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:30,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:30:30,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:30,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:30:30,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:30,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 20:30:30,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:30,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:30:30,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:30,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-16 20:30:30,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:30,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 20:30:30,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:30,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-16 20:30:30,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:30,764 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-16 20:30:30,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:30:30,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194800439] [2021-11-16 20:30:30,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194800439] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:30:30,764 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:30:30,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-16 20:30:30,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166163356] [2021-11-16 20:30:30,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:30:30,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-16 20:30:30,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:30:30,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-16 20:30:30,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-16 20:30:30,767 INFO L87 Difference]: Start difference. First operand 155 states and 207 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 5 states have internal predecessors, (30), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-16 20:30:31,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:30:31,100 INFO L93 Difference]: Finished difference Result 307 states and 413 transitions. [2021-11-16 20:30:31,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-16 20:30:31,100 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 5 states have internal predecessors, (30), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 46 [2021-11-16 20:30:31,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:30:31,102 INFO L225 Difference]: With dead ends: 307 [2021-11-16 20:30:31,102 INFO L226 Difference]: Without dead ends: 168 [2021-11-16 20:30:31,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-16 20:30:31,103 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 202 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-16 20:30:31,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 598 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-16 20:30:31,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-11-16 20:30:31,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 158. [2021-11-16 20:30:31,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 107 states have (on average 1.2523364485981308) internal successors, (134), 109 states have internal predecessors, (134), 38 states have call successors, (38), 11 states have call predecessors, (38), 12 states have return successors, (43), 37 states have call predecessors, (43), 37 states have call successors, (43) [2021-11-16 20:30:31,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 215 transitions. [2021-11-16 20:30:31,114 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 215 transitions. Word has length 46 [2021-11-16 20:30:31,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:30:31,115 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 215 transitions. [2021-11-16 20:30:31,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 5 states have internal predecessors, (30), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-16 20:30:31,115 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 215 transitions. [2021-11-16 20:30:31,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-16 20:30:31,116 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:30:31,116 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:30:31,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-16 20:30:31,117 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:30:31,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:30:31,117 INFO L85 PathProgramCache]: Analyzing trace with hash 862482782, now seen corresponding path program 1 times [2021-11-16 20:30:31,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:30:31,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773878245] [2021-11-16 20:30:31,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:31,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:30:31,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:31,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:30:31,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:31,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 20:30:31,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:31,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:30:31,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:31,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-16 20:30:31,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:31,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 20:30:31,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:31,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-16 20:30:31,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:31,309 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-16 20:30:31,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:30:31,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773878245] [2021-11-16 20:30:31,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773878245] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:30:31,326 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:30:31,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-16 20:30:31,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021554524] [2021-11-16 20:30:31,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:30:31,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-16 20:30:31,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:30:31,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-16 20:30:31,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-16 20:30:31,328 INFO L87 Difference]: Start difference. First operand 158 states and 215 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-16 20:30:31,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:30:31,679 INFO L93 Difference]: Finished difference Result 210 states and 276 transitions. [2021-11-16 20:30:31,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-16 20:30:31,679 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 52 [2021-11-16 20:30:31,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:30:31,681 INFO L225 Difference]: With dead ends: 210 [2021-11-16 20:30:31,681 INFO L226 Difference]: Without dead ends: 172 [2021-11-16 20:30:31,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-11-16 20:30:31,682 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 125 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 851 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-16 20:30:31,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 851 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-16 20:30:31,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-11-16 20:30:31,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 160. [2021-11-16 20:30:31,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 109 states have (on average 1.2477064220183487) internal successors, (136), 111 states have internal predecessors, (136), 38 states have call successors, (38), 11 states have call predecessors, (38), 12 states have return successors, (43), 37 states have call predecessors, (43), 37 states have call successors, (43) [2021-11-16 20:30:31,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 217 transitions. [2021-11-16 20:30:31,691 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 217 transitions. Word has length 52 [2021-11-16 20:30:31,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:30:31,692 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 217 transitions. [2021-11-16 20:30:31,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-16 20:30:31,692 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 217 transitions. [2021-11-16 20:30:31,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-16 20:30:31,693 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:30:31,693 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:30:31,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-16 20:30:31,694 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:30:31,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:30:31,694 INFO L85 PathProgramCache]: Analyzing trace with hash 877723525, now seen corresponding path program 1 times [2021-11-16 20:30:31,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:30:31,694 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379431549] [2021-11-16 20:30:31,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:31,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:30:31,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:31,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:30:31,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:31,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 20:30:31,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:31,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:30:31,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:31,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-16 20:30:31,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:31,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 20:30:31,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:31,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-16 20:30:31,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:31,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-16 20:30:31,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:31,911 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-16 20:30:31,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:30:31,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379431549] [2021-11-16 20:30:31,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379431549] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:30:31,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487170958] [2021-11-16 20:30:31,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:31,912 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:30:31,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:30:31,913 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) [2021-11-16 20:30:31,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-16 20:30:32,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:32,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 2429 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-16 20:30:32,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:30:32,469 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-16 20:30:32,470 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 20:30:32,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487170958] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:30:32,470 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 20:30:32,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 15 [2021-11-16 20:30:32,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499733933] [2021-11-16 20:30:32,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:30:32,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-16 20:30:32,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:30:32,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-16 20:30:32,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-11-16 20:30:32,472 INFO L87 Difference]: Start difference. First operand 160 states and 217 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-16 20:30:32,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:30:32,502 INFO L93 Difference]: Finished difference Result 204 states and 270 transitions. [2021-11-16 20:30:32,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-16 20:30:32,502 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 60 [2021-11-16 20:30:32,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:30:32,516 INFO L225 Difference]: With dead ends: 204 [2021-11-16 20:30:32,516 INFO L226 Difference]: Without dead ends: 166 [2021-11-16 20:30:32,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-11-16 20:30:32,517 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 3 mSDsluCounter, 821 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1030 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 20:30:32,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 1030 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 20:30:32,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-11-16 20:30:32,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 160. [2021-11-16 20:30:32,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 109 states have (on average 1.2477064220183487) internal successors, (136), 111 states have internal predecessors, (136), 38 states have call successors, (38), 11 states have call predecessors, (38), 12 states have return successors, (43), 37 states have call predecessors, (43), 37 states have call successors, (43) [2021-11-16 20:30:32,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 217 transitions. [2021-11-16 20:30:32,526 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 217 transitions. Word has length 60 [2021-11-16 20:30:32,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:30:32,526 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 217 transitions. [2021-11-16 20:30:32,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-16 20:30:32,527 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 217 transitions. [2021-11-16 20:30:32,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-16 20:30:32,543 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:30:32,543 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:30:32,565 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-16 20:30:32,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:30:32,744 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:30:32,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:30:32,744 INFO L85 PathProgramCache]: Analyzing trace with hash -268177860, now seen corresponding path program 1 times [2021-11-16 20:30:32,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:30:32,745 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587954349] [2021-11-16 20:30:32,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:32,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:30:32,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:32,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:30:32,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:32,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 20:30:32,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:32,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:30:32,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:32,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-16 20:30:32,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:32,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 20:30:32,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:33,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-16 20:30:33,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:33,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-16 20:30:33,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:33,109 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-16 20:30:33,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:30:33,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587954349] [2021-11-16 20:30:33,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587954349] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:30:33,110 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:30:33,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-16 20:30:33,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245390748] [2021-11-16 20:30:33,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:30:33,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-16 20:30:33,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:30:33,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-16 20:30:33,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-16 20:30:33,112 INFO L87 Difference]: Start difference. First operand 160 states and 217 transitions. Second operand has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-16 20:30:33,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:30:33,553 INFO L93 Difference]: Finished difference Result 181 states and 244 transitions. [2021-11-16 20:30:33,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-16 20:30:33,554 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 64 [2021-11-16 20:30:33,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:30:33,555 INFO L225 Difference]: With dead ends: 181 [2021-11-16 20:30:33,555 INFO L226 Difference]: Without dead ends: 174 [2021-11-16 20:30:33,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-11-16 20:30:33,556 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 144 mSDsluCounter, 981 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 1185 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-16 20:30:33,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 1185 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-16 20:30:33,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-11-16 20:30:33,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 164. [2021-11-16 20:30:33,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 112 states have (on average 1.2410714285714286) internal successors, (139), 115 states have internal predecessors, (139), 38 states have call successors, (38), 11 states have call predecessors, (38), 13 states have return successors, (50), 37 states have call predecessors, (50), 37 states have call successors, (50) [2021-11-16 20:30:33,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 227 transitions. [2021-11-16 20:30:33,575 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 227 transitions. Word has length 64 [2021-11-16 20:30:33,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:30:33,576 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 227 transitions. [2021-11-16 20:30:33,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-16 20:30:33,576 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 227 transitions. [2021-11-16 20:30:33,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-16 20:30:33,581 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:30:33,581 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:30:33,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-16 20:30:33,582 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:30:33,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:30:33,583 INFO L85 PathProgramCache]: Analyzing trace with hash 7549444, now seen corresponding path program 1 times [2021-11-16 20:30:33,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:30:33,583 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418545865] [2021-11-16 20:30:33,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:33,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:30:33,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:33,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:30:33,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:33,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 20:30:33,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:33,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:30:33,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:33,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-16 20:30:33,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:33,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 20:30:33,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:33,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-16 20:30:33,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:33,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-16 20:30:33,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:33,805 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-16 20:30:33,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:30:33,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418545865] [2021-11-16 20:30:33,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418545865] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:30:33,806 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:30:33,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-16 20:30:33,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540686879] [2021-11-16 20:30:33,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:30:33,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-16 20:30:33,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:30:33,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-16 20:30:33,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-16 20:30:33,808 INFO L87 Difference]: Start difference. First operand 164 states and 227 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-16 20:30:34,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:30:34,197 INFO L93 Difference]: Finished difference Result 347 states and 495 transitions. [2021-11-16 20:30:34,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-16 20:30:34,198 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 68 [2021-11-16 20:30:34,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:30:34,200 INFO L225 Difference]: With dead ends: 347 [2021-11-16 20:30:34,200 INFO L226 Difference]: Without dead ends: 199 [2021-11-16 20:30:34,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-11-16 20:30:34,201 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 201 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-16 20:30:34,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 716 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-16 20:30:34,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-11-16 20:30:34,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 169. [2021-11-16 20:30:34,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 117 states have (on average 1.2478632478632479) internal successors, (146), 120 states have internal predecessors, (146), 38 states have call successors, (38), 11 states have call predecessors, (38), 13 states have return successors, (50), 37 states have call predecessors, (50), 37 states have call successors, (50) [2021-11-16 20:30:34,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 234 transitions. [2021-11-16 20:30:34,210 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 234 transitions. Word has length 68 [2021-11-16 20:30:34,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:30:34,211 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 234 transitions. [2021-11-16 20:30:34,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-16 20:30:34,211 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 234 transitions. [2021-11-16 20:30:34,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-16 20:30:34,212 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:30:34,212 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:30:34,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-16 20:30:34,212 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:30:34,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:30:34,213 INFO L85 PathProgramCache]: Analyzing trace with hash 265714882, now seen corresponding path program 1 times [2021-11-16 20:30:34,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:30:34,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420042064] [2021-11-16 20:30:34,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:34,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:30:34,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:34,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:30:34,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:34,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 20:30:34,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:34,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:30:34,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:34,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-16 20:30:34,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:34,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 20:30:34,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:34,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-16 20:30:34,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:34,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-16 20:30:34,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:34,612 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-16 20:30:34,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:30:34,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420042064] [2021-11-16 20:30:34,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420042064] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:30:34,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311699557] [2021-11-16 20:30:34,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:34,614 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:30:34,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:30:34,632 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) [2021-11-16 20:30:34,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-16 20:30:34,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:34,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 2448 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-16 20:30:34,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:30:35,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-16 20:30:35,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-16 20:30:35,288 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-11-16 20:30:35,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 1 [2021-11-16 20:30:35,350 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-16 20:30:35,351 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 20:30:35,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311699557] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:30:35,351 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 20:30:35,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 17 [2021-11-16 20:30:35,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199815751] [2021-11-16 20:30:35,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:30:35,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-16 20:30:35,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:30:35,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-16 20:30:35,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-11-16 20:30:35,353 INFO L87 Difference]: Start difference. First operand 169 states and 234 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 9 states have internal predecessors, (53), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-16 20:30:35,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:30:35,431 INFO L93 Difference]: Finished difference Result 348 states and 478 transitions. [2021-11-16 20:30:35,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-16 20:30:35,431 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 9 states have internal predecessors, (53), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 68 [2021-11-16 20:30:35,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:30:35,432 INFO L225 Difference]: With dead ends: 348 [2021-11-16 20:30:35,432 INFO L226 Difference]: Without dead ends: 188 [2021-11-16 20:30:35,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-11-16 20:30:35,434 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 22 mSDsluCounter, 1289 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 1492 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-16 20:30:35,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 1492 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 75 Unchecked, 0.1s Time] [2021-11-16 20:30:35,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-11-16 20:30:35,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 185. [2021-11-16 20:30:35,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 133 states have (on average 1.255639097744361) internal successors, (167), 135 states have internal predecessors, (167), 38 states have call successors, (38), 12 states have call predecessors, (38), 13 states have return successors, (44), 37 states have call predecessors, (44), 37 states have call successors, (44) [2021-11-16 20:30:35,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 249 transitions. [2021-11-16 20:30:35,441 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 249 transitions. Word has length 68 [2021-11-16 20:30:35,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:30:35,441 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 249 transitions. [2021-11-16 20:30:35,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 9 states have internal predecessors, (53), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-16 20:30:35,441 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 249 transitions. [2021-11-16 20:30:35,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-16 20:30:35,442 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:30:35,442 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:30:35,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-16 20:30:35,673 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,SelfDestructingSolverStorable6 [2021-11-16 20:30:35,673 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:30:35,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:30:35,674 INFO L85 PathProgramCache]: Analyzing trace with hash -631678396, now seen corresponding path program 1 times [2021-11-16 20:30:35,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:30:35,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762569588] [2021-11-16 20:30:35,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:35,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:30:35,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:35,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:30:35,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:35,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 20:30:35,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:35,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:30:35,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:35,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-16 20:30:35,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:35,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 20:30:35,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:35,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-16 20:30:35,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:35,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-16 20:30:35,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:35,817 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-16 20:30:35,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:30:35,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762569588] [2021-11-16 20:30:35,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762569588] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:30:35,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292931647] [2021-11-16 20:30:35,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:35,818 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:30:35,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:30:35,819 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) [2021-11-16 20:30:35,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-16 20:30:36,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:36,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 2443 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-16 20:30:36,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:30:36,283 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-16 20:30:36,283 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 20:30:36,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292931647] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:30:36,284 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 20:30:36,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 6 [2021-11-16 20:30:36,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209464841] [2021-11-16 20:30:36,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:30:36,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-16 20:30:36,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:30:36,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-16 20:30:36,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-16 20:30:36,286 INFO L87 Difference]: Start difference. First operand 185 states and 249 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-16 20:30:36,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:30:36,308 INFO L93 Difference]: Finished difference Result 348 states and 477 transitions. [2021-11-16 20:30:36,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-16 20:30:36,308 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 68 [2021-11-16 20:30:36,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:30:36,310 INFO L225 Difference]: With dead ends: 348 [2021-11-16 20:30:36,310 INFO L226 Difference]: Without dead ends: 194 [2021-11-16 20:30:36,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-16 20:30:36,312 INFO L933 BasicCegarLoop]: 218 mSDtfsCounter, 20 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 20:30:36,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 613 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 20:30:36,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-11-16 20:30:36,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 177. [2021-11-16 20:30:36,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 126 states have (on average 1.253968253968254) internal successors, (158), 127 states have internal predecessors, (158), 38 states have call successors, (38), 12 states have call predecessors, (38), 12 states have return successors, (43), 37 states have call predecessors, (43), 37 states have call successors, (43) [2021-11-16 20:30:36,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 239 transitions. [2021-11-16 20:30:36,324 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 239 transitions. Word has length 68 [2021-11-16 20:30:36,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:30:36,324 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 239 transitions. [2021-11-16 20:30:36,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-16 20:30:36,324 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 239 transitions. [2021-11-16 20:30:36,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-16 20:30:36,326 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:30:36,326 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:30:36,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-16 20:30:36,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:30:36,546 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:30:36,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:30:36,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1530819000, now seen corresponding path program 1 times [2021-11-16 20:30:36,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:30:36,547 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428920269] [2021-11-16 20:30:36,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:36,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:30:36,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:36,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:30:36,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:36,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 20:30:36,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:36,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:30:36,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:36,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-16 20:30:36,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:36,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-16 20:30:36,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:36,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-16 20:30:36,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:36,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-16 20:30:36,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:36,748 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-16 20:30:36,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:30:36,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428920269] [2021-11-16 20:30:36,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428920269] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:30:36,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370220418] [2021-11-16 20:30:36,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:36,749 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:30:36,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:30:36,750 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) [2021-11-16 20:30:36,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-16 20:30:37,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:37,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 2455 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-16 20:30:37,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:30:37,287 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-16 20:30:37,287 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 20:30:37,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370220418] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:30:37,288 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 20:30:37,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 12 [2021-11-16 20:30:37,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410381383] [2021-11-16 20:30:37,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:30:37,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-16 20:30:37,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:30:37,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-16 20:30:37,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-11-16 20:30:37,290 INFO L87 Difference]: Start difference. First operand 177 states and 239 transitions. Second operand has 9 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-16 20:30:37,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:30:37,376 INFO L93 Difference]: Finished difference Result 339 states and 467 transitions. [2021-11-16 20:30:37,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-16 20:30:37,376 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 72 [2021-11-16 20:30:37,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:30:37,377 INFO L225 Difference]: With dead ends: 339 [2021-11-16 20:30:37,378 INFO L226 Difference]: Without dead ends: 185 [2021-11-16 20:30:37,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-11-16 20:30:37,379 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 12 mSDsluCounter, 1335 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1531 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-16 20:30:37,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1531 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-16 20:30:37,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-11-16 20:30:37,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 182. [2021-11-16 20:30:37,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 130 states have (on average 1.2461538461538462) internal successors, (162), 132 states have internal predecessors, (162), 38 states have call successors, (38), 12 states have call predecessors, (38), 13 states have return successors, (50), 37 states have call predecessors, (50), 37 states have call successors, (50) [2021-11-16 20:30:37,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 250 transitions. [2021-11-16 20:30:37,385 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 250 transitions. Word has length 72 [2021-11-16 20:30:37,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:30:37,386 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 250 transitions. [2021-11-16 20:30:37,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-16 20:30:37,386 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 250 transitions. [2021-11-16 20:30:37,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-16 20:30:37,386 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:30:37,387 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:30:37,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-16 20:30:37,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:30:37,609 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:30:37,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:30:37,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1019185037, now seen corresponding path program 1 times [2021-11-16 20:30:37,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:30:37,610 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847619930] [2021-11-16 20:30:37,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:37,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:30:37,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:37,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:30:37,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:37,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 20:30:37,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:37,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:30:37,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:37,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-16 20:30:37,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:37,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 20:30:37,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:37,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-16 20:30:37,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:37,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-16 20:30:37,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:37,726 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-16 20:30:37,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:30:37,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847619930] [2021-11-16 20:30:37,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847619930] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:30:37,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597551872] [2021-11-16 20:30:37,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:37,727 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:30:37,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:30:37,739 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) [2021-11-16 20:30:37,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-16 20:30:38,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:38,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 2460 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-16 20:30:38,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:30:38,176 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-16 20:30:38,176 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 20:30:38,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597551872] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:30:38,177 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 20:30:38,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 6 [2021-11-16 20:30:38,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183212881] [2021-11-16 20:30:38,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:30:38,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-16 20:30:38,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:30:38,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-16 20:30:38,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-16 20:30:38,178 INFO L87 Difference]: Start difference. First operand 182 states and 250 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-16 20:30:38,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:30:38,196 INFO L93 Difference]: Finished difference Result 346 states and 483 transitions. [2021-11-16 20:30:38,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-16 20:30:38,197 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 74 [2021-11-16 20:30:38,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:30:38,198 INFO L225 Difference]: With dead ends: 346 [2021-11-16 20:30:38,198 INFO L226 Difference]: Without dead ends: 185 [2021-11-16 20:30:38,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-16 20:30:38,199 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 9 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 20:30:38,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 606 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 20:30:38,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-11-16 20:30:38,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 182. [2021-11-16 20:30:38,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 130 states have (on average 1.2307692307692308) internal successors, (160), 132 states have internal predecessors, (160), 38 states have call successors, (38), 12 states have call predecessors, (38), 13 states have return successors, (50), 37 states have call predecessors, (50), 37 states have call successors, (50) [2021-11-16 20:30:38,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 248 transitions. [2021-11-16 20:30:38,220 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 248 transitions. Word has length 74 [2021-11-16 20:30:38,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:30:38,220 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 248 transitions. [2021-11-16 20:30:38,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-16 20:30:38,221 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 248 transitions. [2021-11-16 20:30:38,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-16 20:30:38,221 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:30:38,221 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:30:38,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-16 20:30:38,435 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,SelfDestructingSolverStorable9 [2021-11-16 20:30:38,436 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:30:38,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:30:38,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1357293521, now seen corresponding path program 1 times [2021-11-16 20:30:38,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:30:38,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865941275] [2021-11-16 20:30:38,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:38,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:30:38,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:38,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:30:38,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:38,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 20:30:38,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:38,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:30:38,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:38,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-16 20:30:38,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:38,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 20:30:38,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:38,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-16 20:30:38,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:38,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-16 20:30:38,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:38,552 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-16 20:30:38,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:30:38,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865941275] [2021-11-16 20:30:38,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865941275] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:30:38,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826639094] [2021-11-16 20:30:38,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:38,553 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:30:38,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:30:38,554 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) [2021-11-16 20:30:38,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-16 20:30:38,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:38,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 2462 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-16 20:30:38,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:30:38,987 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-16 20:30:38,987 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 20:30:38,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826639094] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:30:38,987 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 20:30:38,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 6 [2021-11-16 20:30:38,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674756756] [2021-11-16 20:30:38,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:30:38,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-16 20:30:38,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:30:38,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-16 20:30:38,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-16 20:30:38,989 INFO L87 Difference]: Start difference. First operand 182 states and 248 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-16 20:30:39,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:30:39,007 INFO L93 Difference]: Finished difference Result 352 states and 498 transitions. [2021-11-16 20:30:39,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-16 20:30:39,008 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 74 [2021-11-16 20:30:39,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:30:39,009 INFO L225 Difference]: With dead ends: 352 [2021-11-16 20:30:39,009 INFO L226 Difference]: Without dead ends: 191 [2021-11-16 20:30:39,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-16 20:30:39,010 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 34 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 20:30:39,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 604 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 20:30:39,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-11-16 20:30:39,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 178. [2021-11-16 20:30:39,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 126 states have (on average 1.2142857142857142) internal successors, (153), 128 states have internal predecessors, (153), 38 states have call successors, (38), 12 states have call predecessors, (38), 13 states have return successors, (50), 37 states have call predecessors, (50), 37 states have call successors, (50) [2021-11-16 20:30:39,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 241 transitions. [2021-11-16 20:30:39,016 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 241 transitions. Word has length 74 [2021-11-16 20:30:39,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:30:39,016 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 241 transitions. [2021-11-16 20:30:39,017 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-16 20:30:39,017 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 241 transitions. [2021-11-16 20:30:39,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-16 20:30:39,017 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:30:39,017 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:30:39,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-16 20:30:39,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:30:39,235 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:30:39,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:30:39,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1341774803, now seen corresponding path program 1 times [2021-11-16 20:30:39,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:30:39,236 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219089385] [2021-11-16 20:30:39,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:39,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:30:39,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:39,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:30:39,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:39,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 20:30:39,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:39,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:30:39,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:39,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-16 20:30:39,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:39,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 20:30:39,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:39,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-16 20:30:39,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:39,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-16 20:30:39,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:39,739 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-16 20:30:39,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:30:39,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219089385] [2021-11-16 20:30:39,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219089385] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:30:39,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246946786] [2021-11-16 20:30:39,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:39,740 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:30:39,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:30:39,752 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) [2021-11-16 20:30:39,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-16 20:30:40,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:40,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 2457 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-16 20:30:40,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:30:40,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-16 20:30:40,696 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-16 20:30:40,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:30:41,086 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-16 20:30:41,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246946786] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 20:30:41,086 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-16 20:30:41,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 9] total 28 [2021-11-16 20:30:41,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959544654] [2021-11-16 20:30:41,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-16 20:30:41,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-16 20:30:41,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:30:41,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-16 20:30:41,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2021-11-16 20:30:41,087 INFO L87 Difference]: Start difference. First operand 178 states and 241 transitions. Second operand has 28 states, 27 states have (on average 4.62962962962963) internal successors, (125), 26 states have internal predecessors, (125), 7 states have call successors, (19), 5 states have call predecessors, (19), 7 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2021-11-16 20:30:42,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:30:42,666 INFO L93 Difference]: Finished difference Result 263 states and 339 transitions. [2021-11-16 20:30:42,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-16 20:30:42,667 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 4.62962962962963) internal successors, (125), 26 states have internal predecessors, (125), 7 states have call successors, (19), 5 states have call predecessors, (19), 7 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 74 [2021-11-16 20:30:42,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:30:42,668 INFO L225 Difference]: With dead ends: 263 [2021-11-16 20:30:42,668 INFO L226 Difference]: Without dead ends: 235 [2021-11-16 20:30:42,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 142 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=309, Invalid=1497, Unknown=0, NotChecked=0, Total=1806 [2021-11-16 20:30:42,669 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 430 mSDsluCounter, 1497 mSDsCounter, 0 mSdLazyCounter, 1614 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 1709 SdHoareTripleChecker+Invalid, 2182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 454 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-16 20:30:42,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [457 Valid, 1709 Invalid, 2182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1614 Invalid, 0 Unknown, 454 Unchecked, 1.1s Time] [2021-11-16 20:30:42,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-11-16 20:30:42,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 208. [2021-11-16 20:30:42,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 152 states have (on average 1.1973684210526316) internal successors, (182), 155 states have internal predecessors, (182), 39 states have call successors, (39), 15 states have call predecessors, (39), 16 states have return successors, (51), 37 states have call predecessors, (51), 38 states have call successors, (51) [2021-11-16 20:30:42,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 272 transitions. [2021-11-16 20:30:42,682 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 272 transitions. Word has length 74 [2021-11-16 20:30:42,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:30:42,683 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 272 transitions. [2021-11-16 20:30:42,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 4.62962962962963) internal successors, (125), 26 states have internal predecessors, (125), 7 states have call successors, (19), 5 states have call predecessors, (19), 7 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2021-11-16 20:30:42,683 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 272 transitions. [2021-11-16 20:30:42,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-16 20:30:42,684 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:30:42,684 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:30:42,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-16 20:30:42,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:30:42,904 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:30:42,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:30:42,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1784602215, now seen corresponding path program 1 times [2021-11-16 20:30:42,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:30:42,904 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950860494] [2021-11-16 20:30:42,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:42,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:30:42,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:42,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:30:43,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:43,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 20:30:43,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:43,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:30:43,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:43,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-16 20:30:43,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:43,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 20:30:43,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:43,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-16 20:30:43,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:43,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-16 20:30:43,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:43,214 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-16 20:30:43,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:30:43,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950860494] [2021-11-16 20:30:43,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950860494] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:30:43,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178937095] [2021-11-16 20:30:43,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:43,215 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:30:43,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:30:43,216 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) [2021-11-16 20:30:43,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-16 20:30:43,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:43,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 2454 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-16 20:30:43,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:30:44,321 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-16 20:30:44,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:30:44,861 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-16 20:30:44,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 1 [2021-11-16 20:30:45,060 INFO L354 Elim1Store]: treesize reduction 18, result has 48.6 percent of original size [2021-11-16 20:30:45,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 35 [2021-11-16 20:30:45,181 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-16 20:30:45,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178937095] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 20:30:45,182 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-16 20:30:45,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 34 [2021-11-16 20:30:45,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262561155] [2021-11-16 20:30:45,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-16 20:30:45,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-16 20:30:45,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:30:45,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-16 20:30:45,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=981, Unknown=0, NotChecked=0, Total=1122 [2021-11-16 20:30:45,184 INFO L87 Difference]: Start difference. First operand 208 states and 272 transitions. Second operand has 34 states, 34 states have (on average 3.588235294117647) internal successors, (122), 32 states have internal predecessors, (122), 6 states have call successors, (18), 5 states have call predecessors, (18), 7 states have return successors, (17), 6 states have call predecessors, (17), 5 states have call successors, (17) [2021-11-16 20:30:47,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:30:47,112 INFO L93 Difference]: Finished difference Result 305 states and 410 transitions. [2021-11-16 20:30:47,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-16 20:30:47,112 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.588235294117647) internal successors, (122), 32 states have internal predecessors, (122), 6 states have call successors, (18), 5 states have call predecessors, (18), 7 states have return successors, (17), 6 states have call predecessors, (17), 5 states have call successors, (17) Word has length 74 [2021-11-16 20:30:47,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:30:47,114 INFO L225 Difference]: With dead ends: 305 [2021-11-16 20:30:47,114 INFO L226 Difference]: Without dead ends: 293 [2021-11-16 20:30:47,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 138 SyntacticMatches, 5 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=542, Invalid=2880, Unknown=0, NotChecked=0, Total=3422 [2021-11-16 20:30:47,116 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 370 mSDsluCounter, 1497 mSDsCounter, 0 mSdLazyCounter, 1359 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 1694 SdHoareTripleChecker+Invalid, 1796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 1359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 311 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-16 20:30:47,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [415 Valid, 1694 Invalid, 1796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 1359 Invalid, 0 Unknown, 311 Unchecked, 1.0s Time] [2021-11-16 20:30:47,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-11-16 20:30:47,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 252. [2021-11-16 20:30:47,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 187 states have (on average 1.1764705882352942) internal successors, (220), 191 states have internal predecessors, (220), 44 states have call successors, (44), 18 states have call predecessors, (44), 20 states have return successors, (68), 42 states have call predecessors, (68), 43 states have call successors, (68) [2021-11-16 20:30:47,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 332 transitions. [2021-11-16 20:30:47,128 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 332 transitions. Word has length 74 [2021-11-16 20:30:47,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:30:47,129 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 332 transitions. [2021-11-16 20:30:47,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.588235294117647) internal successors, (122), 32 states have internal predecessors, (122), 6 states have call successors, (18), 5 states have call predecessors, (18), 7 states have return successors, (17), 6 states have call predecessors, (17), 5 states have call successors, (17) [2021-11-16 20:30:47,129 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 332 transitions. [2021-11-16 20:30:47,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-16 20:30:47,130 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:30:47,130 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:30:47,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-16 20:30:47,336 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,SelfDestructingSolverStorable12 [2021-11-16 20:30:47,337 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:30:47,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:30:47,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1526436777, now seen corresponding path program 1 times [2021-11-16 20:30:47,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:30:47,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800341838] [2021-11-16 20:30:47,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:47,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:30:47,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:47,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:30:47,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:47,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 20:30:47,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:47,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:30:47,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:47,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-16 20:30:47,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:47,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 20:30:47,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:47,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-16 20:30:47,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:47,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-16 20:30:47,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:47,572 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-16 20:30:47,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:30:47,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800341838] [2021-11-16 20:30:47,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800341838] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:30:47,573 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:30:47,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-16 20:30:47,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697599535] [2021-11-16 20:30:47,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:30:47,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-16 20:30:47,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:30:47,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-16 20:30:47,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-16 20:30:47,574 INFO L87 Difference]: Start difference. First operand 252 states and 332 transitions. Second operand has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-16 20:30:47,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:30:47,906 INFO L93 Difference]: Finished difference Result 466 states and 627 transitions. [2021-11-16 20:30:47,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-16 20:30:47,906 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 74 [2021-11-16 20:30:47,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:30:47,907 INFO L225 Difference]: With dead ends: 466 [2021-11-16 20:30:47,908 INFO L226 Difference]: Without dead ends: 265 [2021-11-16 20:30:47,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-16 20:30:47,909 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 164 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-16 20:30:47,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 593 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-16 20:30:47,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-11-16 20:30:47,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 250. [2021-11-16 20:30:47,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 185 states have (on average 1.162162162162162) internal successors, (215), 189 states have internal predecessors, (215), 44 states have call successors, (44), 18 states have call predecessors, (44), 20 states have return successors, (68), 42 states have call predecessors, (68), 43 states have call successors, (68) [2021-11-16 20:30:47,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 327 transitions. [2021-11-16 20:30:47,920 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 327 transitions. Word has length 74 [2021-11-16 20:30:47,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:30:47,921 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 327 transitions. [2021-11-16 20:30:47,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-16 20:30:47,921 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 327 transitions. [2021-11-16 20:30:47,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-16 20:30:47,922 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:30:47,922 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:30:47,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-16 20:30:47,922 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:30:47,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:30:47,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1612971803, now seen corresponding path program 1 times [2021-11-16 20:30:47,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:30:47,923 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719604141] [2021-11-16 20:30:47,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:47,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:30:48,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:48,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:30:48,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:48,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 20:30:48,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:48,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:30:48,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:48,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-16 20:30:48,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:48,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 20:30:48,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:48,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-16 20:30:48,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:48,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-16 20:30:48,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:48,504 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-16 20:30:48,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:30:48,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719604141] [2021-11-16 20:30:48,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719604141] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:30:48,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013925985] [2021-11-16 20:30:48,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:48,505 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:30:48,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:30:48,520 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) [2021-11-16 20:30:48,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-16 20:30:48,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:48,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 2459 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-16 20:30:48,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:30:48,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-16 20:30:49,727 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-16 20:30:49,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:30:50,257 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-16 20:30:50,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013925985] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 20:30:50,258 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-16 20:30:50,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 11] total 33 [2021-11-16 20:30:50,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172092067] [2021-11-16 20:30:50,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-16 20:30:50,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-16 20:30:50,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:30:50,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-16 20:30:50,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2021-11-16 20:30:50,259 INFO L87 Difference]: Start difference. First operand 250 states and 327 transitions. Second operand has 33 states, 32 states have (on average 3.96875) internal successors, (127), 31 states have internal predecessors, (127), 7 states have call successors, (19), 5 states have call predecessors, (19), 7 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2021-11-16 20:30:52,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:30:52,418 INFO L93 Difference]: Finished difference Result 278 states and 361 transitions. [2021-11-16 20:30:52,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-16 20:30:52,419 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 3.96875) internal successors, (127), 31 states have internal predecessors, (127), 7 states have call successors, (19), 5 states have call predecessors, (19), 7 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 74 [2021-11-16 20:30:52,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:30:52,420 INFO L225 Difference]: With dead ends: 278 [2021-11-16 20:30:52,420 INFO L226 Difference]: Without dead ends: 266 [2021-11-16 20:30:52,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 140 SyntacticMatches, 5 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 720 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=477, Invalid=2279, Unknown=0, NotChecked=0, Total=2756 [2021-11-16 20:30:52,423 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 356 mSDsluCounter, 1877 mSDsCounter, 0 mSdLazyCounter, 1894 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 2062 SdHoareTripleChecker+Invalid, 2593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 587 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-16 20:30:52,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [384 Valid, 2062 Invalid, 2593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1894 Invalid, 0 Unknown, 587 Unchecked, 1.4s Time] [2021-11-16 20:30:52,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-11-16 20:30:52,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 240. [2021-11-16 20:30:52,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 175 states have (on average 1.1657142857142857) internal successors, (204), 180 states have internal predecessors, (204), 44 states have call successors, (44), 17 states have call predecessors, (44), 20 states have return successors, (68), 42 states have call predecessors, (68), 43 states have call successors, (68) [2021-11-16 20:30:52,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 316 transitions. [2021-11-16 20:30:52,450 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 316 transitions. Word has length 74 [2021-11-16 20:30:52,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:30:52,453 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 316 transitions. [2021-11-16 20:30:52,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 3.96875) internal successors, (127), 31 states have internal predecessors, (127), 7 states have call successors, (19), 5 states have call predecessors, (19), 7 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2021-11-16 20:30:52,453 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 316 transitions. [2021-11-16 20:30:52,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-16 20:30:52,454 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:30:52,454 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:30:52,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-16 20:30:52,654 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 [2021-11-16 20:30:52,655 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:30:52,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:30:52,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1710014025, now seen corresponding path program 1 times [2021-11-16 20:30:52,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:30:52,655 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301975021] [2021-11-16 20:30:52,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:52,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:30:52,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:52,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:30:52,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:52,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 20:30:52,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:52,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:30:52,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:52,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-16 20:30:52,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:52,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 20:30:52,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:52,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-16 20:30:52,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:52,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-16 20:30:52,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:52,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:30:52,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:52,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-16 20:30:52,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:52,862 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-16 20:30:52,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:30:52,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301975021] [2021-11-16 20:30:52,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301975021] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:30:52,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153733283] [2021-11-16 20:30:52,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:52,863 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:30:52,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:30:52,880 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) [2021-11-16 20:30:52,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-16 20:30:53,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:53,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 2525 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-16 20:30:53,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:30:53,391 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-16 20:30:53,391 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 20:30:53,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153733283] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:30:53,391 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 20:30:53,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 14 [2021-11-16 20:30:53,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200699302] [2021-11-16 20:30:53,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:30:53,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-16 20:30:53,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:30:53,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-16 20:30:53,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-11-16 20:30:53,393 INFO L87 Difference]: Start difference. First operand 240 states and 316 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-16 20:30:53,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:30:53,413 INFO L93 Difference]: Finished difference Result 299 states and 385 transitions. [2021-11-16 20:30:53,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-16 20:30:53,414 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 78 [2021-11-16 20:30:53,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:30:53,415 INFO L225 Difference]: With dead ends: 299 [2021-11-16 20:30:53,415 INFO L226 Difference]: Without dead ends: 245 [2021-11-16 20:30:53,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-11-16 20:30:53,416 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 2 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 811 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 20:30:53,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 811 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 20:30:53,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-11-16 20:30:53,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 245. [2021-11-16 20:30:53,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 179 states have (on average 1.1620111731843576) internal successors, (208), 184 states have internal predecessors, (208), 44 states have call successors, (44), 17 states have call predecessors, (44), 21 states have return successors, (69), 43 states have call predecessors, (69), 43 states have call successors, (69) [2021-11-16 20:30:53,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 321 transitions. [2021-11-16 20:30:53,426 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 321 transitions. Word has length 78 [2021-11-16 20:30:53,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:30:53,426 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 321 transitions. [2021-11-16 20:30:53,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-16 20:30:53,427 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 321 transitions. [2021-11-16 20:30:53,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-16 20:30:53,428 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:30:53,428 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:30:53,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-16 20:30:53,646 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 [2021-11-16 20:30:53,647 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:30:53,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:30:53,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1707972510, now seen corresponding path program 1 times [2021-11-16 20:30:53,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:30:53,647 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456496219] [2021-11-16 20:30:53,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:53,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:30:53,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:53,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:30:53,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:53,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 20:30:53,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:53,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:30:53,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:53,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-16 20:30:53,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:53,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 20:30:53,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:53,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-16 20:30:53,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:53,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-16 20:30:53,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:53,833 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-16 20:30:53,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:30:53,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456496219] [2021-11-16 20:30:53,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456496219] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:30:53,834 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:30:53,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-16 20:30:53,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757229800] [2021-11-16 20:30:53,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:30:53,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-16 20:30:53,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:30:53,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-16 20:30:53,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-11-16 20:30:53,835 INFO L87 Difference]: Start difference. First operand 245 states and 321 transitions. Second operand has 12 states, 11 states have (on average 4.363636363636363) internal successors, (48), 8 states have internal predecessors, (48), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-16 20:30:54,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:30:54,353 INFO L93 Difference]: Finished difference Result 262 states and 343 transitions. [2021-11-16 20:30:54,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-16 20:30:54,353 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.363636363636363) internal successors, (48), 8 states have internal predecessors, (48), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 76 [2021-11-16 20:30:54,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:30:54,355 INFO L225 Difference]: With dead ends: 262 [2021-11-16 20:30:54,355 INFO L226 Difference]: Without dead ends: 238 [2021-11-16 20:30:54,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-11-16 20:30:54,355 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 154 mSDsluCounter, 1267 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 1468 SdHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-16 20:30:54,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 1468 Invalid, 800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 696 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-16 20:30:54,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-11-16 20:30:54,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 228. [2021-11-16 20:30:54,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 167 states have (on average 1.155688622754491) internal successors, (193), 170 states have internal predecessors, (193), 41 states have call successors, (41), 16 states have call predecessors, (41), 19 states have return successors, (64), 41 states have call predecessors, (64), 40 states have call successors, (64) [2021-11-16 20:30:54,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 298 transitions. [2021-11-16 20:30:54,363 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 298 transitions. Word has length 76 [2021-11-16 20:30:54,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:30:54,364 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 298 transitions. [2021-11-16 20:30:54,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.363636363636363) internal successors, (48), 8 states have internal predecessors, (48), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-16 20:30:54,364 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 298 transitions. [2021-11-16 20:30:54,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-16 20:30:54,364 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:30:54,364 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:30:54,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-16 20:30:54,365 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:30:54,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:30:54,365 INFO L85 PathProgramCache]: Analyzing trace with hash -992443870, now seen corresponding path program 1 times [2021-11-16 20:30:54,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:30:54,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764947633] [2021-11-16 20:30:54,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:54,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:30:54,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:54,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:30:54,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:54,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 20:30:54,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:54,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:30:54,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:54,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-16 20:30:54,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:54,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 20:30:54,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:54,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-16 20:30:54,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:54,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-16 20:30:54,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:54,872 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-16 20:30:54,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:30:54,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764947633] [2021-11-16 20:30:54,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764947633] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:30:54,872 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:30:54,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-11-16 20:30:54,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029666934] [2021-11-16 20:30:54,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:30:54,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-16 20:30:54,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:30:54,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-16 20:30:54,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2021-11-16 20:30:54,873 INFO L87 Difference]: Start difference. First operand 228 states and 298 transitions. Second operand has 17 states, 16 states have (on average 3.625) internal successors, (58), 12 states have internal predecessors, (58), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-16 20:30:55,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:30:55,842 INFO L93 Difference]: Finished difference Result 245 states and 320 transitions. [2021-11-16 20:30:55,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-16 20:30:55,843 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.625) internal successors, (58), 12 states have internal predecessors, (58), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 76 [2021-11-16 20:30:55,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:30:55,844 INFO L225 Difference]: With dead ends: 245 [2021-11-16 20:30:55,844 INFO L226 Difference]: Without dead ends: 210 [2021-11-16 20:30:55,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2021-11-16 20:30:55,845 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 228 mSDsluCounter, 1408 mSDsCounter, 0 mSdLazyCounter, 1556 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 1582 SdHoareTripleChecker+Invalid, 1676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-16 20:30:55,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 1582 Invalid, 1676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1556 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-16 20:30:55,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-11-16 20:30:55,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 189. [2021-11-16 20:30:55,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 136 states have (on average 1.1764705882352942) internal successors, (160), 139 states have internal predecessors, (160), 36 states have call successors, (36), 13 states have call predecessors, (36), 16 states have return successors, (56), 36 states have call predecessors, (56), 35 states have call successors, (56) [2021-11-16 20:30:55,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 252 transitions. [2021-11-16 20:30:55,854 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 252 transitions. Word has length 76 [2021-11-16 20:30:55,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:30:55,855 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 252 transitions. [2021-11-16 20:30:55,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.625) internal successors, (58), 12 states have internal predecessors, (58), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-16 20:30:55,855 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 252 transitions. [2021-11-16 20:30:55,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-16 20:30:55,856 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:30:55,856 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:30:55,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-16 20:30:55,856 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:30:55,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:30:55,857 INFO L85 PathProgramCache]: Analyzing trace with hash -907054334, now seen corresponding path program 1 times [2021-11-16 20:30:55,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:30:55,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799413408] [2021-11-16 20:30:55,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:55,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:30:55,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:55,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:30:55,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:55,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 20:30:55,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:55,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:30:55,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:55,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-16 20:30:55,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:55,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 20:30:55,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:56,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-16 20:30:56,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:56,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-16 20:30:56,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:56,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:30:56,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:56,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-16 20:30:56,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:56,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-11-16 20:30:56,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:56,057 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-16 20:30:56,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:30:56,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799413408] [2021-11-16 20:30:56,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799413408] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:30:56,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66556912] [2021-11-16 20:30:56,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:56,057 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:30:56,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:30:56,058 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) [2021-11-16 20:30:56,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-16 20:30:56,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:56,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 2541 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-16 20:30:56,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:30:56,548 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-16 20:30:56,548 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 20:30:56,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66556912] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:30:56,549 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 20:30:56,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [12] total 17 [2021-11-16 20:30:56,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547021333] [2021-11-16 20:30:56,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:30:56,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-16 20:30:56,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:30:56,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-16 20:30:56,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-11-16 20:30:56,551 INFO L87 Difference]: Start difference. First operand 189 states and 252 transitions. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2021-11-16 20:30:56,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:30:56,718 INFO L93 Difference]: Finished difference Result 352 states and 473 transitions. [2021-11-16 20:30:56,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-16 20:30:56,719 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) Word has length 84 [2021-11-16 20:30:56,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:30:56,720 INFO L225 Difference]: With dead ends: 352 [2021-11-16 20:30:56,720 INFO L226 Difference]: Without dead ends: 192 [2021-11-16 20:30:56,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-11-16 20:30:56,721 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 286 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 667 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-16 20:30:56,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 667 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-16 20:30:56,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-11-16 20:30:56,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2021-11-16 20:30:56,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 138 states have (on average 1.173913043478261) internal successors, (162), 142 states have internal predecessors, (162), 36 states have call successors, (36), 13 states have call predecessors, (36), 17 states have return successors, (60), 36 states have call predecessors, (60), 35 states have call successors, (60) [2021-11-16 20:30:56,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 258 transitions. [2021-11-16 20:30:56,728 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 258 transitions. Word has length 84 [2021-11-16 20:30:56,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:30:56,728 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 258 transitions. [2021-11-16 20:30:56,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2021-11-16 20:30:56,728 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 258 transitions. [2021-11-16 20:30:56,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-16 20:30:56,729 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:30:56,729 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:30:56,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-16 20:30:56,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:30:56,948 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:30:56,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:30:56,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1537117189, now seen corresponding path program 1 times [2021-11-16 20:30:56,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:30:56,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130093635] [2021-11-16 20:30:56,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:56,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:30:56,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:57,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:30:57,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:57,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 20:30:57,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:57,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:30:57,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:57,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-16 20:30:57,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:57,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 20:30:57,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:57,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-16 20:30:57,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:57,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-16 20:30:57,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:57,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:30:57,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:57,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-16 20:30:57,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:57,094 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-16 20:30:57,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:30:57,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130093635] [2021-11-16 20:30:57,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130093635] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:30:57,095 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:30:57,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-16 20:30:57,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609660567] [2021-11-16 20:30:57,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:30:57,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-16 20:30:57,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:30:57,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-16 20:30:57,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-16 20:30:57,096 INFO L87 Difference]: Start difference. First operand 192 states and 258 transitions. Second operand has 10 states, 10 states have (on average 6.0) internal successors, (60), 6 states have internal predecessors, (60), 2 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2021-11-16 20:30:57,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:30:57,445 INFO L93 Difference]: Finished difference Result 268 states and 343 transitions. [2021-11-16 20:30:57,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-16 20:30:57,445 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 6 states have internal predecessors, (60), 2 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) Word has length 89 [2021-11-16 20:30:57,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:30:57,446 INFO L225 Difference]: With dead ends: 268 [2021-11-16 20:30:57,446 INFO L226 Difference]: Without dead ends: 206 [2021-11-16 20:30:57,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-11-16 20:30:57,447 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 132 mSDsluCounter, 736 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 915 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-16 20:30:57,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 915 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-16 20:30:57,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-11-16 20:30:57,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 193. [2021-11-16 20:30:57,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 139 states have (on average 1.1726618705035972) internal successors, (163), 143 states have internal predecessors, (163), 36 states have call successors, (36), 13 states have call predecessors, (36), 17 states have return successors, (60), 36 states have call predecessors, (60), 35 states have call successors, (60) [2021-11-16 20:30:57,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 259 transitions. [2021-11-16 20:30:57,455 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 259 transitions. Word has length 89 [2021-11-16 20:30:57,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:30:57,455 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 259 transitions. [2021-11-16 20:30:57,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 6 states have internal predecessors, (60), 2 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2021-11-16 20:30:57,456 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 259 transitions. [2021-11-16 20:30:57,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-16 20:30:57,457 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:30:57,457 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:30:57,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-16 20:30:57,457 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:30:57,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:30:57,457 INFO L85 PathProgramCache]: Analyzing trace with hash -381488286, now seen corresponding path program 1 times [2021-11-16 20:30:57,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:30:57,458 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724923112] [2021-11-16 20:30:57,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:57,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:30:57,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:57,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:30:57,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:57,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 20:30:57,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:57,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:30:57,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:57,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-16 20:30:57,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:57,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 20:30:57,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:57,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-16 20:30:57,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:57,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-16 20:30:57,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:57,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:30:57,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:57,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-16 20:30:57,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:57,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-11-16 20:30:57,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:57,654 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-16 20:30:57,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:30:57,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724923112] [2021-11-16 20:30:57,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724923112] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:30:57,655 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:30:57,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-16 20:30:57,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563205678] [2021-11-16 20:30:57,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:30:57,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-16 20:30:57,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:30:57,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-16 20:30:57,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-11-16 20:30:57,657 INFO L87 Difference]: Start difference. First operand 193 states and 259 transitions. Second operand has 11 states, 10 states have (on average 5.9) internal successors, (59), 6 states have internal predecessors, (59), 2 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-16 20:30:58,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:30:58,099 INFO L93 Difference]: Finished difference Result 208 states and 274 transitions. [2021-11-16 20:30:58,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-16 20:30:58,100 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.9) internal successors, (59), 6 states have internal predecessors, (59), 2 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) Word has length 96 [2021-11-16 20:30:58,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:30:58,101 INFO L225 Difference]: With dead ends: 208 [2021-11-16 20:30:58,101 INFO L226 Difference]: Without dead ends: 206 [2021-11-16 20:30:58,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-11-16 20:30:58,102 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 91 mSDsluCounter, 948 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 1135 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-16 20:30:58,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 1135 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-16 20:30:58,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-11-16 20:30:58,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 198. [2021-11-16 20:30:58,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 142 states have (on average 1.1690140845070423) internal successors, (166), 146 states have internal predecessors, (166), 37 states have call successors, (37), 14 states have call predecessors, (37), 18 states have return successors, (61), 37 states have call predecessors, (61), 36 states have call successors, (61) [2021-11-16 20:30:58,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 264 transitions. [2021-11-16 20:30:58,109 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 264 transitions. Word has length 96 [2021-11-16 20:30:58,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:30:58,110 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 264 transitions. [2021-11-16 20:30:58,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.9) internal successors, (59), 6 states have internal predecessors, (59), 2 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-16 20:30:58,110 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 264 transitions. [2021-11-16 20:30:58,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-16 20:30:58,111 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:30:58,111 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:30:58,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-16 20:30:58,112 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:30:58,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:30:58,112 INFO L85 PathProgramCache]: Analyzing trace with hash -2050117184, now seen corresponding path program 1 times [2021-11-16 20:30:58,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:30:58,112 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118856162] [2021-11-16 20:30:58,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:58,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:30:58,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:58,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:30:58,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:58,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 20:30:58,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:58,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:30:58,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:58,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-16 20:30:58,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:58,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 20:30:58,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:58,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-16 20:30:58,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:58,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-16 20:30:58,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:58,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:30:58,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:58,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-16 20:30:58,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:58,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-16 20:30:58,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:58,329 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-16 20:30:58,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:30:58,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118856162] [2021-11-16 20:30:58,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118856162] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:30:58,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779860446] [2021-11-16 20:30:58,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:58,330 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:30:58,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:30:58,331 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) [2021-11-16 20:30:58,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-16 20:30:58,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:58,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 2585 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-16 20:30:58,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:30:58,902 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-16 20:30:58,903 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 20:30:58,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779860446] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:30:58,903 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 20:30:58,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 18 [2021-11-16 20:30:58,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125378681] [2021-11-16 20:30:58,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:30:58,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-16 20:30:58,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:30:58,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-16 20:30:58,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-11-16 20:30:58,904 INFO L87 Difference]: Start difference. First operand 198 states and 264 transitions. Second operand has 8 states, 8 states have (on average 8.25) internal successors, (66), 8 states have internal predecessors, (66), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-16 20:30:59,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:30:59,085 INFO L93 Difference]: Finished difference Result 335 states and 444 transitions. [2021-11-16 20:30:59,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-16 20:30:59,085 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.25) internal successors, (66), 8 states have internal predecessors, (66), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 97 [2021-11-16 20:30:59,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:30:59,086 INFO L225 Difference]: With dead ends: 335 [2021-11-16 20:30:59,086 INFO L226 Difference]: Without dead ends: 199 [2021-11-16 20:30:59,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-11-16 20:30:59,087 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 324 mSDsluCounter, 625 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 781 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-16 20:30:59,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 781 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-16 20:30:59,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-11-16 20:30:59,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 195. [2021-11-16 20:30:59,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 140 states have (on average 1.1642857142857144) internal successors, (163), 143 states have internal predecessors, (163), 37 states have call successors, (37), 14 states have call predecessors, (37), 17 states have return successors, (57), 37 states have call predecessors, (57), 36 states have call successors, (57) [2021-11-16 20:30:59,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 257 transitions. [2021-11-16 20:30:59,096 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 257 transitions. Word has length 97 [2021-11-16 20:30:59,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:30:59,096 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 257 transitions. [2021-11-16 20:30:59,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.25) internal successors, (66), 8 states have internal predecessors, (66), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-16 20:30:59,097 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 257 transitions. [2021-11-16 20:30:59,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-16 20:30:59,097 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:30:59,098 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:30:59,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-16 20:30:59,311 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,SelfDestructingSolverStorable21 [2021-11-16 20:30:59,311 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:30:59,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:30:59,312 INFO L85 PathProgramCache]: Analyzing trace with hash -37945624, now seen corresponding path program 1 times [2021-11-16 20:30:59,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:30:59,312 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531773334] [2021-11-16 20:30:59,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:59,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:30:59,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:59,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:30:59,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:59,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 20:30:59,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:59,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:30:59,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:59,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-16 20:30:59,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:59,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 20:30:59,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:59,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-16 20:30:59,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:59,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-16 20:30:59,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:59,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:30:59,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:59,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-16 20:30:59,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:59,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-11-16 20:30:59,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:59,662 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-16 20:30:59,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:30:59,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531773334] [2021-11-16 20:30:59,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531773334] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:30:59,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932381125] [2021-11-16 20:30:59,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:59,663 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:30:59,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:30:59,664 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) [2021-11-16 20:30:59,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-16 20:30:59,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:00,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 2582 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-16 20:31:00,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:31:00,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-16 20:31:00,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-16 20:31:00,393 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-11-16 20:31:00,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 1 [2021-11-16 20:31:00,446 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-16 20:31:00,446 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 20:31:00,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932381125] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:31:00,446 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 20:31:00,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [14] total 19 [2021-11-16 20:31:00,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897242286] [2021-11-16 20:31:00,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:31:00,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-16 20:31:00,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:31:00,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-16 20:31:00,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-11-16 20:31:00,448 INFO L87 Difference]: Start difference. First operand 195 states and 257 transitions. Second operand has 12 states, 12 states have (on average 6.583333333333333) internal successors, (79), 11 states have internal predecessors, (79), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-16 20:31:00,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:31:00,495 INFO L93 Difference]: Finished difference Result 406 states and 526 transitions. [2021-11-16 20:31:00,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-16 20:31:00,496 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.583333333333333) internal successors, (79), 11 states have internal predecessors, (79), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 100 [2021-11-16 20:31:00,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:31:00,497 INFO L225 Difference]: With dead ends: 406 [2021-11-16 20:31:00,497 INFO L226 Difference]: Without dead ends: 236 [2021-11-16 20:31:00,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 107 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-11-16 20:31:00,499 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 23 mSDsluCounter, 828 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 1021 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 20:31:00,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 1021 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 57 Unchecked, 0.0s Time] [2021-11-16 20:31:00,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-11-16 20:31:00,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 234. [2021-11-16 20:31:00,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 174 states have (on average 1.1551724137931034) internal successors, (201), 178 states have internal predecessors, (201), 39 states have call successors, (39), 16 states have call predecessors, (39), 20 states have return successors, (61), 39 states have call predecessors, (61), 38 states have call successors, (61) [2021-11-16 20:31:00,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 301 transitions. [2021-11-16 20:31:00,508 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 301 transitions. Word has length 100 [2021-11-16 20:31:00,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:31:00,508 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 301 transitions. [2021-11-16 20:31:00,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.583333333333333) internal successors, (79), 11 states have internal predecessors, (79), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-16 20:31:00,508 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 301 transitions. [2021-11-16 20:31:00,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-16 20:31:00,509 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:31:00,509 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:31:00,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-16 20:31:00,727 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,SelfDestructingSolverStorable22 [2021-11-16 20:31:00,727 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:31:00,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:31:00,728 INFO L85 PathProgramCache]: Analyzing trace with hash -530571798, now seen corresponding path program 1 times [2021-11-16 20:31:00,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:31:00,728 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721380841] [2021-11-16 20:31:00,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:31:00,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:31:00,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:00,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:31:00,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:00,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 20:31:00,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:00,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:31:00,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:00,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-16 20:31:00,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:01,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 20:31:01,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:01,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-16 20:31:01,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:01,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-16 20:31:01,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:01,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:31:01,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:01,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-16 20:31:01,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:01,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-11-16 20:31:01,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:01,149 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-16 20:31:01,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:31:01,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721380841] [2021-11-16 20:31:01,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721380841] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:31:01,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107724422] [2021-11-16 20:31:01,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:31:01,150 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:31:01,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:31:01,151 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) [2021-11-16 20:31:01,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-16 20:31:01,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:01,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 2587 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-16 20:31:01,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:31:01,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-16 20:31:02,102 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-16 20:31:02,103 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 20:31:02,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107724422] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:31:02,103 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 20:31:02,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [15] total 25 [2021-11-16 20:31:02,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271280763] [2021-11-16 20:31:02,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:31:02,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-16 20:31:02,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:31:02,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-16 20:31:02,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-11-16 20:31:02,104 INFO L87 Difference]: Start difference. First operand 234 states and 301 transitions. Second operand has 12 states, 12 states have (on average 6.583333333333333) internal successors, (79), 11 states have internal predecessors, (79), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-16 20:31:02,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:31:02,187 INFO L93 Difference]: Finished difference Result 443 states and 563 transitions. [2021-11-16 20:31:02,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-16 20:31:02,188 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.583333333333333) internal successors, (79), 11 states have internal predecessors, (79), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 100 [2021-11-16 20:31:02,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:31:02,189 INFO L225 Difference]: With dead ends: 443 [2021-11-16 20:31:02,189 INFO L226 Difference]: Without dead ends: 273 [2021-11-16 20:31:02,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 105 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-11-16 20:31:02,191 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 15 mSDsluCounter, 1406 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 1597 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-16 20:31:02,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 1597 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 120 Unchecked, 0.1s Time] [2021-11-16 20:31:02,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-11-16 20:31:02,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 259. [2021-11-16 20:31:02,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 198 states have (on average 1.1565656565656566) internal successors, (229), 202 states have internal predecessors, (229), 39 states have call successors, (39), 17 states have call predecessors, (39), 21 states have return successors, (53), 39 states have call predecessors, (53), 38 states have call successors, (53) [2021-11-16 20:31:02,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 321 transitions. [2021-11-16 20:31:02,200 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 321 transitions. Word has length 100 [2021-11-16 20:31:02,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:31:02,200 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 321 transitions. [2021-11-16 20:31:02,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.583333333333333) internal successors, (79), 11 states have internal predecessors, (79), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-16 20:31:02,200 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 321 transitions. [2021-11-16 20:31:02,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-16 20:31:02,201 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:31:02,201 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:31:02,225 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-11-16 20:31:02,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:31:02,417 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:31:02,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:31:02,418 INFO L85 PathProgramCache]: Analyzing trace with hash 776605346, now seen corresponding path program 1 times [2021-11-16 20:31:02,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:31:02,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494438314] [2021-11-16 20:31:02,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:31:02,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:31:02,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:02,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:31:02,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:02,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 20:31:02,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:02,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:31:02,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:02,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-16 20:31:02,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:02,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 20:31:02,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:02,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-16 20:31:02,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:02,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-16 20:31:02,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:02,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:31:02,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:02,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-16 20:31:02,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:02,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-16 20:31:02,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:02,619 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-16 20:31:02,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:31:02,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494438314] [2021-11-16 20:31:02,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494438314] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:31:02,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896805292] [2021-11-16 20:31:02,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:31:02,620 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:31:02,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:31:02,621 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:31:02,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-16 20:31:02,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:02,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 2589 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-16 20:31:02,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:31:03,143 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-16 20:31:03,144 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 20:31:03,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896805292] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:31:03,144 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 20:31:03,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 11 [2021-11-16 20:31:03,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505138947] [2021-11-16 20:31:03,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:31:03,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-16 20:31:03,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:31:03,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-16 20:31:03,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-11-16 20:31:03,145 INFO L87 Difference]: Start difference. First operand 259 states and 321 transitions. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 6 states have internal predecessors, (74), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-16 20:31:03,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:31:03,179 INFO L93 Difference]: Finished difference Result 430 states and 544 transitions. [2021-11-16 20:31:03,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-16 20:31:03,180 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 6 states have internal predecessors, (74), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 104 [2021-11-16 20:31:03,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:31:03,182 INFO L225 Difference]: With dead ends: 430 [2021-11-16 20:31:03,182 INFO L226 Difference]: Without dead ends: 245 [2021-11-16 20:31:03,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-11-16 20:31:03,187 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 10 mSDsluCounter, 982 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 1182 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 20:31:03,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 1182 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 20:31:03,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-11-16 20:31:03,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 237. [2021-11-16 20:31:03,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 177 states have (on average 1.1412429378531073) internal successors, (202), 181 states have internal predecessors, (202), 39 states have call successors, (39), 16 states have call predecessors, (39), 20 states have return successors, (52), 39 states have call predecessors, (52), 38 states have call successors, (52) [2021-11-16 20:31:03,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 293 transitions. [2021-11-16 20:31:03,196 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 293 transitions. Word has length 104 [2021-11-16 20:31:03,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:31:03,196 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 293 transitions. [2021-11-16 20:31:03,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 6 states have internal predecessors, (74), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-16 20:31:03,200 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 293 transitions. [2021-11-16 20:31:03,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-16 20:31:03,201 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:31:03,201 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:31:03,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-16 20:31:03,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:31:03,422 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:31:03,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:31:03,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1367312055, now seen corresponding path program 2 times [2021-11-16 20:31:03,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:31:03,423 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394397244] [2021-11-16 20:31:03,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:31:03,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:31:03,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:03,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:31:03,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:03,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 20:31:03,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:03,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:31:03,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:03,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-16 20:31:03,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:03,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 20:31:03,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:03,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-16 20:31:03,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:03,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-16 20:31:03,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:03,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:31:03,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:03,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-16 20:31:03,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:03,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-11-16 20:31:03,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:03,892 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-16 20:31:03,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:31:03,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394397244] [2021-11-16 20:31:03,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394397244] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:31:03,893 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:31:03,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-16 20:31:03,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330547589] [2021-11-16 20:31:03,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:31:03,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-16 20:31:03,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:31:03,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-16 20:31:03,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-16 20:31:03,895 INFO L87 Difference]: Start difference. First operand 237 states and 293 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 8 states have internal predecessors, (56), 5 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-16 20:31:04,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:31:04,449 INFO L93 Difference]: Finished difference Result 462 states and 573 transitions. [2021-11-16 20:31:04,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-16 20:31:04,464 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 8 states have internal predecessors, (56), 5 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 106 [2021-11-16 20:31:04,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:31:04,466 INFO L225 Difference]: With dead ends: 462 [2021-11-16 20:31:04,466 INFO L226 Difference]: Without dead ends: 244 [2021-11-16 20:31:04,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-11-16 20:31:04,467 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 127 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 844 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 801 SdHoareTripleChecker+Invalid, 895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-16 20:31:04,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 801 Invalid, 895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 844 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-16 20:31:04,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-11-16 20:31:04,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 237. [2021-11-16 20:31:04,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 177 states have (on average 1.1355932203389831) internal successors, (201), 181 states have internal predecessors, (201), 39 states have call successors, (39), 16 states have call predecessors, (39), 20 states have return successors, (52), 39 states have call predecessors, (52), 38 states have call successors, (52) [2021-11-16 20:31:04,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 292 transitions. [2021-11-16 20:31:04,477 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 292 transitions. Word has length 106 [2021-11-16 20:31:04,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:31:04,477 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 292 transitions. [2021-11-16 20:31:04,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 8 states have internal predecessors, (56), 5 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-16 20:31:04,477 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 292 transitions. [2021-11-16 20:31:04,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-16 20:31:04,478 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:31:04,478 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:31:04,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-16 20:31:04,479 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:31:04,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:31:04,479 INFO L85 PathProgramCache]: Analyzing trace with hash 792965239, now seen corresponding path program 1 times [2021-11-16 20:31:04,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:31:04,479 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649868988] [2021-11-16 20:31:04,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:31:04,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:31:04,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:04,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:31:04,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:04,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 20:31:04,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:04,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-16 20:31:04,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:04,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:31:04,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:04,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-16 20:31:04,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:04,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-16 20:31:04,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:04,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-16 20:31:04,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:04,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-16 20:31:04,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:05,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:31:05,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:05,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-16 20:31:05,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:05,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-16 20:31:05,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:05,135 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 30 proven. 13 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-16 20:31:05,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:31:05,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649868988] [2021-11-16 20:31:05,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649868988] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:31:05,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723033830] [2021-11-16 20:31:05,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:31:05,137 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:31:05,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:31:05,138 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:31:05,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-16 20:31:05,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:05,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 2604 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-16 20:31:05,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:31:05,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-16 20:31:06,035 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 34 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-16 20:31:06,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:31:06,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723033830] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:31:06,295 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 20:31:06,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 25 [2021-11-16 20:31:06,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3029653] [2021-11-16 20:31:06,295 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 20:31:06,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-16 20:31:06,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:31:06,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-16 20:31:06,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2021-11-16 20:31:06,297 INFO L87 Difference]: Start difference. First operand 237 states and 292 transitions. Second operand has 25 states, 24 states have (on average 5.125) internal successors, (123), 21 states have internal predecessors, (123), 8 states have call successors, (19), 7 states have call predecessors, (19), 6 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) [2021-11-16 20:31:07,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:31:07,815 INFO L93 Difference]: Finished difference Result 380 states and 482 transitions. [2021-11-16 20:31:07,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-16 20:31:07,816 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 5.125) internal successors, (123), 21 states have internal predecessors, (123), 8 states have call successors, (19), 7 states have call predecessors, (19), 6 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) Word has length 111 [2021-11-16 20:31:07,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:31:07,817 INFO L225 Difference]: With dead ends: 380 [2021-11-16 20:31:07,817 INFO L226 Difference]: Without dead ends: 301 [2021-11-16 20:31:07,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 151 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=298, Invalid=1594, Unknown=0, NotChecked=0, Total=1892 [2021-11-16 20:31:07,818 INFO L933 BasicCegarLoop]: 232 mSDtfsCounter, 488 mSDsluCounter, 1058 mSDsCounter, 0 mSdLazyCounter, 1435 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 1290 SdHoareTripleChecker+Invalid, 2074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 1435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 394 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-16 20:31:07,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [496 Valid, 1290 Invalid, 2074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 1435 Invalid, 0 Unknown, 394 Unchecked, 1.0s Time] [2021-11-16 20:31:07,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-11-16 20:31:07,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 240. [2021-11-16 20:31:07,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 181 states have (on average 1.132596685082873) internal successors, (205), 185 states have internal predecessors, (205), 38 states have call successors, (38), 16 states have call predecessors, (38), 20 states have return successors, (55), 38 states have call predecessors, (55), 37 states have call successors, (55) [2021-11-16 20:31:07,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 298 transitions. [2021-11-16 20:31:07,848 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 298 transitions. Word has length 111 [2021-11-16 20:31:07,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:31:07,849 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 298 transitions. [2021-11-16 20:31:07,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 5.125) internal successors, (123), 21 states have internal predecessors, (123), 8 states have call successors, (19), 7 states have call predecessors, (19), 6 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) [2021-11-16 20:31:07,849 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 298 transitions. [2021-11-16 20:31:07,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-16 20:31:07,850 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:31:07,850 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:31:07,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-16 20:31:08,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-16 20:31:08,063 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:31:08,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:31:08,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1961555517, now seen corresponding path program 1 times [2021-11-16 20:31:08,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:31:08,064 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251025210] [2021-11-16 20:31:08,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:31:08,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:31:08,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:08,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:31:08,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:08,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 20:31:08,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:08,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-16 20:31:08,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:08,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:31:08,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:08,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-16 20:31:08,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:08,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-16 20:31:08,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:08,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-16 20:31:08,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:08,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-16 20:31:08,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:08,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:31:08,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:08,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-16 20:31:08,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:08,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-16 20:31:08,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:08,472 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 14 proven. 23 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-16 20:31:08,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:31:08,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251025210] [2021-11-16 20:31:08,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251025210] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:31:08,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787663159] [2021-11-16 20:31:08,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:31:08,473 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:31:08,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:31:08,496 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:31:08,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-16 20:31:08,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:08,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 2601 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-16 20:31:08,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:31:09,599 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 27 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-16 20:31:09,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:31:17,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787663159] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:31:17,102 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 20:31:17,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 27 [2021-11-16 20:31:17,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788370764] [2021-11-16 20:31:17,102 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 20:31:17,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-16 20:31:17,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:31:17,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-16 20:31:17,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1053, Unknown=3, NotChecked=0, Total=1190 [2021-11-16 20:31:17,103 INFO L87 Difference]: Start difference. First operand 240 states and 298 transitions. Second operand has 27 states, 27 states have (on average 4.962962962962963) internal successors, (134), 22 states have internal predecessors, (134), 8 states have call successors, (22), 7 states have call predecessors, (22), 6 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2021-11-16 20:31:19,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:31:19,780 INFO L93 Difference]: Finished difference Result 582 states and 843 transitions. [2021-11-16 20:31:19,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-16 20:31:19,781 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.962962962962963) internal successors, (134), 22 states have internal predecessors, (134), 8 states have call successors, (22), 7 states have call predecessors, (22), 6 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) Word has length 111 [2021-11-16 20:31:19,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:31:19,784 INFO L225 Difference]: With dead ends: 582 [2021-11-16 20:31:19,784 INFO L226 Difference]: Without dead ends: 524 [2021-11-16 20:31:19,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 141 SyntacticMatches, 6 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 824 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=515, Invalid=2674, Unknown=3, NotChecked=0, Total=3192 [2021-11-16 20:31:19,786 INFO L933 BasicCegarLoop]: 330 mSDtfsCounter, 504 mSDsluCounter, 2192 mSDsCounter, 0 mSdLazyCounter, 2530 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 2522 SdHoareTripleChecker+Invalid, 3413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 2530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 577 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-16 20:31:19,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [576 Valid, 2522 Invalid, 3413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 2530 Invalid, 0 Unknown, 577 Unchecked, 1.8s Time] [2021-11-16 20:31:19,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-11-16 20:31:19,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 293. [2021-11-16 20:31:19,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 227 states have (on average 1.1233480176211454) internal successors, (255), 232 states have internal predecessors, (255), 42 states have call successors, (42), 18 states have call predecessors, (42), 23 states have return successors, (69), 42 states have call predecessors, (69), 41 states have call successors, (69) [2021-11-16 20:31:19,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 366 transitions. [2021-11-16 20:31:19,806 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 366 transitions. Word has length 111 [2021-11-16 20:31:19,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:31:19,807 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 366 transitions. [2021-11-16 20:31:19,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.962962962962963) internal successors, (134), 22 states have internal predecessors, (134), 8 states have call successors, (22), 7 states have call predecessors, (22), 6 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2021-11-16 20:31:19,807 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 366 transitions. [2021-11-16 20:31:19,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-16 20:31:19,808 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:31:19,808 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:31:19,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-16 20:31:20,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-16 20:31:20,021 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:31:20,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:31:20,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1339854717, now seen corresponding path program 1 times [2021-11-16 20:31:20,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:31:20,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822942098] [2021-11-16 20:31:20,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:31:20,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:31:20,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:20,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:31:20,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:20,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 20:31:20,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:20,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-16 20:31:20,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:20,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:31:20,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:20,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-16 20:31:20,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:20,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-16 20:31:20,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:20,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-16 20:31:20,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:20,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-16 20:31:20,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:20,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:31:20,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:20,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-16 20:31:20,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:20,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-16 20:31:20,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:20,831 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 14 proven. 23 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-16 20:31:20,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:31:20,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822942098] [2021-11-16 20:31:20,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822942098] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:31:20,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813701725] [2021-11-16 20:31:20,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:31:20,832 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:31:20,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:31:20,833 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:31:20,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-16 20:31:21,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:21,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 2611 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-16 20:31:21,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:31:21,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-16 20:31:22,300 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-16 20:31:22,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:31:24,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813701725] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:31:24,893 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 20:31:24,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 28 [2021-11-16 20:31:24,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186215734] [2021-11-16 20:31:24,895 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 20:31:24,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-16 20:31:24,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:31:24,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-16 20:31:24,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1001, Unknown=1, NotChecked=0, Total=1122 [2021-11-16 20:31:24,897 INFO L87 Difference]: Start difference. First operand 293 states and 366 transitions. Second operand has 28 states, 27 states have (on average 5.037037037037037) internal successors, (136), 24 states have internal predecessors, (136), 8 states have call successors, (21), 7 states have call predecessors, (21), 7 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2021-11-16 20:31:27,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:31:27,635 INFO L93 Difference]: Finished difference Result 443 states and 559 transitions. [2021-11-16 20:31:27,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-16 20:31:27,635 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 5.037037037037037) internal successors, (136), 24 states have internal predecessors, (136), 8 states have call successors, (21), 7 states have call predecessors, (21), 7 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) Word has length 111 [2021-11-16 20:31:27,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:31:27,643 INFO L225 Difference]: With dead ends: 443 [2021-11-16 20:31:27,644 INFO L226 Difference]: Without dead ends: 380 [2021-11-16 20:31:27,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 144 SyntacticMatches, 7 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 879 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=608, Invalid=2697, Unknown=1, NotChecked=0, Total=3306 [2021-11-16 20:31:27,645 INFO L933 BasicCegarLoop]: 230 mSDtfsCounter, 425 mSDsluCounter, 1285 mSDsCounter, 0 mSdLazyCounter, 1755 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 1515 SdHoareTripleChecker+Invalid, 2529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 1755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 592 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-16 20:31:27,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [448 Valid, 1515 Invalid, 2529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 1755 Invalid, 0 Unknown, 592 Unchecked, 1.3s Time] [2021-11-16 20:31:27,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-11-16 20:31:27,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 229. [2021-11-16 20:31:27,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 175 states have (on average 1.1428571428571428) internal successors, (200), 177 states have internal predecessors, (200), 36 states have call successors, (36), 15 states have call predecessors, (36), 17 states have return successors, (40), 36 states have call predecessors, (40), 35 states have call successors, (40) [2021-11-16 20:31:27,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 276 transitions. [2021-11-16 20:31:27,655 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 276 transitions. Word has length 111 [2021-11-16 20:31:27,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:31:27,655 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 276 transitions. [2021-11-16 20:31:27,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 5.037037037037037) internal successors, (136), 24 states have internal predecessors, (136), 8 states have call successors, (21), 7 states have call predecessors, (21), 7 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2021-11-16 20:31:27,656 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 276 transitions. [2021-11-16 20:31:27,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-16 20:31:27,656 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:31:27,657 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:31:27,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-16 20:31:27,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-16 20:31:27,871 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:31:27,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:31:27,872 INFO L85 PathProgramCache]: Analyzing trace with hash 535434050, now seen corresponding path program 1 times [2021-11-16 20:31:27,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:31:27,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770607181] [2021-11-16 20:31:27,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:31:27,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:31:27,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:27,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:31:27,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:27,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 20:31:27,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:27,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-16 20:31:27,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:27,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:31:27,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:27,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-16 20:31:27,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:27,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-16 20:31:27,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:27,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-16 20:31:27,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:28,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-16 20:31:28,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:28,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:31:28,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:28,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-16 20:31:28,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:28,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-16 20:31:28,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:28,075 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-16 20:31:28,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:31:28,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770607181] [2021-11-16 20:31:28,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770607181] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:31:28,075 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:31:28,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-16 20:31:28,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491208607] [2021-11-16 20:31:28,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:31:28,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-16 20:31:28,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:31:28,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-16 20:31:28,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-11-16 20:31:28,077 INFO L87 Difference]: Start difference. First operand 229 states and 276 transitions. Second operand has 13 states, 12 states have (on average 5.083333333333333) internal successors, (61), 8 states have internal predecessors, (61), 2 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2021-11-16 20:31:28,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:31:28,648 INFO L93 Difference]: Finished difference Result 264 states and 311 transitions. [2021-11-16 20:31:28,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-16 20:31:28,649 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 5.083333333333333) internal successors, (61), 8 states have internal predecessors, (61), 2 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) Word has length 113 [2021-11-16 20:31:28,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:31:28,650 INFO L225 Difference]: With dead ends: 264 [2021-11-16 20:31:28,650 INFO L226 Difference]: Without dead ends: 262 [2021-11-16 20:31:28,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-11-16 20:31:28,651 INFO L933 BasicCegarLoop]: 173 mSDtfsCounter, 100 mSDsluCounter, 1171 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 1344 SdHoareTripleChecker+Invalid, 801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-16 20:31:28,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 1344 Invalid, 801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 744 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-16 20:31:28,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-11-16 20:31:28,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 240. [2021-11-16 20:31:28,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 183 states have (on average 1.1366120218579234) internal successors, (208), 186 states have internal predecessors, (208), 37 states have call successors, (37), 16 states have call predecessors, (37), 19 states have return successors, (42), 37 states have call predecessors, (42), 36 states have call successors, (42) [2021-11-16 20:31:28,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 287 transitions. [2021-11-16 20:31:28,664 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 287 transitions. Word has length 113 [2021-11-16 20:31:28,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:31:28,664 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 287 transitions. [2021-11-16 20:31:28,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 5.083333333333333) internal successors, (61), 8 states have internal predecessors, (61), 2 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2021-11-16 20:31:28,664 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 287 transitions. [2021-11-16 20:31:28,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-16 20:31:28,665 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:31:28,665 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:31:28,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-16 20:31:28,666 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:31:28,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:31:28,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1236498628, now seen corresponding path program 1 times [2021-11-16 20:31:28,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:31:28,666 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815490809] [2021-11-16 20:31:28,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:31:28,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:31:28,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:28,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:31:28,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:28,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 20:31:28,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:28,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-16 20:31:28,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:28,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:31:28,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:28,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-16 20:31:28,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:28,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-16 20:31:28,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:28,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-16 20:31:28,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:28,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-16 20:31:28,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:28,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:31:28,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:28,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-16 20:31:28,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:28,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-16 20:31:28,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:29,046 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 23 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-16 20:31:29,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:31:29,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815490809] [2021-11-16 20:31:29,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815490809] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:31:29,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115245419] [2021-11-16 20:31:29,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:31:29,048 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:31:29,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:31:29,049 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:31:29,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-16 20:31:29,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:29,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 2611 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-16 20:31:29,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:31:30,122 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 32 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-16 20:31:30,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:31:30,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115245419] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:31:30,421 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 20:31:30,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 23 [2021-11-16 20:31:30,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126007682] [2021-11-16 20:31:30,422 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 20:31:30,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-16 20:31:30,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:31:30,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-16 20:31:30,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-11-16 20:31:30,423 INFO L87 Difference]: Start difference. First operand 240 states and 287 transitions. Second operand has 23 states, 23 states have (on average 5.913043478260869) internal successors, (136), 18 states have internal predecessors, (136), 8 states have call successors, (22), 7 states have call predecessors, (22), 6 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2021-11-16 20:31:33,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:31:33,116 INFO L93 Difference]: Finished difference Result 555 states and 744 transitions. [2021-11-16 20:31:33,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-16 20:31:33,116 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.913043478260869) internal successors, (136), 18 states have internal predecessors, (136), 8 states have call successors, (22), 7 states have call predecessors, (22), 6 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) Word has length 113 [2021-11-16 20:31:33,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:31:33,140 INFO L225 Difference]: With dead ends: 555 [2021-11-16 20:31:33,140 INFO L226 Difference]: Without dead ends: 505 [2021-11-16 20:31:33,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 153 SyntacticMatches, 7 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=301, Invalid=1339, Unknown=0, NotChecked=0, Total=1640 [2021-11-16 20:31:33,142 INFO L933 BasicCegarLoop]: 328 mSDtfsCounter, 522 mSDsluCounter, 2892 mSDsCounter, 0 mSdLazyCounter, 3676 mSolverCounterSat, 309 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 574 SdHoareTripleChecker+Valid, 3220 SdHoareTripleChecker+Invalid, 5221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 309 IncrementalHoareTripleChecker+Valid, 3676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1236 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-16 20:31:33,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [574 Valid, 3220 Invalid, 5221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [309 Valid, 3676 Invalid, 0 Unknown, 1236 Unchecked, 2.1s Time] [2021-11-16 20:31:33,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-11-16 20:31:33,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 310. [2021-11-16 20:31:33,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 242 states have (on average 1.115702479338843) internal successors, (270), 247 states have internal predecessors, (270), 43 states have call successors, (43), 19 states have call predecessors, (43), 24 states have return successors, (52), 43 states have call predecessors, (52), 42 states have call successors, (52) [2021-11-16 20:31:33,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 365 transitions. [2021-11-16 20:31:33,173 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 365 transitions. Word has length 113 [2021-11-16 20:31:33,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:31:33,173 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 365 transitions. [2021-11-16 20:31:33,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.913043478260869) internal successors, (136), 18 states have internal predecessors, (136), 8 states have call successors, (22), 7 states have call predecessors, (22), 6 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2021-11-16 20:31:33,174 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 365 transitions. [2021-11-16 20:31:33,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-16 20:31:33,175 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:31:33,175 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:31:33,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-16 20:31:33,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:31:33,391 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:31:33,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:31:33,392 INFO L85 PathProgramCache]: Analyzing trace with hash 782483972, now seen corresponding path program 1 times [2021-11-16 20:31:33,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:31:33,392 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907804993] [2021-11-16 20:31:33,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:31:33,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:31:33,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:33,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:31:33,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:33,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 20:31:33,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:33,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-16 20:31:33,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:33,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:31:33,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:33,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-16 20:31:33,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:33,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-16 20:31:33,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:33,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-16 20:31:33,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:33,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-16 20:31:33,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:33,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:31:33,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:33,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-16 20:31:33,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:33,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-16 20:31:33,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:34,059 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-16 20:31:34,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:31:34,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907804993] [2021-11-16 20:31:34,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907804993] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:31:34,060 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:31:34,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-16 20:31:34,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749691200] [2021-11-16 20:31:34,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:31:34,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-16 20:31:34,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:31:34,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-16 20:31:34,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-11-16 20:31:34,062 INFO L87 Difference]: Start difference. First operand 310 states and 365 transitions. Second operand has 20 states, 19 states have (on average 3.736842105263158) internal successors, (71), 14 states have internal predecessors, (71), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2021-11-16 20:31:35,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:31:35,629 INFO L93 Difference]: Finished difference Result 384 states and 477 transitions. [2021-11-16 20:31:35,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-16 20:31:35,630 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.736842105263158) internal successors, (71), 14 states have internal predecessors, (71), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) Word has length 113 [2021-11-16 20:31:35,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:31:35,631 INFO L225 Difference]: With dead ends: 384 [2021-11-16 20:31:35,631 INFO L226 Difference]: Without dead ends: 382 [2021-11-16 20:31:35,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=185, Invalid=1005, Unknown=0, NotChecked=0, Total=1190 [2021-11-16 20:31:35,632 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 312 mSDsluCounter, 1624 mSDsCounter, 0 mSdLazyCounter, 2330 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 1820 SdHoareTripleChecker+Invalid, 2528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 2330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-16 20:31:35,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 1820 Invalid, 2528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 2330 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-16 20:31:35,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-11-16 20:31:35,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 309. [2021-11-16 20:31:35,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 242 states have (on average 1.115702479338843) internal successors, (270), 247 states have internal predecessors, (270), 42 states have call successors, (42), 19 states have call predecessors, (42), 24 states have return successors, (51), 42 states have call predecessors, (51), 41 states have call successors, (51) [2021-11-16 20:31:35,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 363 transitions. [2021-11-16 20:31:35,648 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 363 transitions. Word has length 113 [2021-11-16 20:31:35,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:31:35,648 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 363 transitions. [2021-11-16 20:31:35,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.736842105263158) internal successors, (71), 14 states have internal predecessors, (71), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2021-11-16 20:31:35,648 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 363 transitions. [2021-11-16 20:31:35,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-16 20:31:35,649 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:31:35,649 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:31:35,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-11-16 20:31:35,649 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:31:35,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:31:35,650 INFO L85 PathProgramCache]: Analyzing trace with hash 47539994, now seen corresponding path program 1 times [2021-11-16 20:31:35,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:31:35,650 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924939756] [2021-11-16 20:31:35,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:31:35,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:31:35,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:35,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:31:35,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:35,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 20:31:35,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:35,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-16 20:31:35,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:35,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:31:35,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:35,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-16 20:31:35,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:35,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-16 20:31:35,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:35,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-16 20:31:35,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:35,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-16 20:31:35,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:35,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:31:35,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:35,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-16 20:31:35,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:35,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-11-16 20:31:35,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:35,815 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-16 20:31:35,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:31:35,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924939756] [2021-11-16 20:31:35,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924939756] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:31:35,821 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:31:35,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-16 20:31:35,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656722073] [2021-11-16 20:31:35,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:31:35,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-16 20:31:35,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:31:35,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-16 20:31:35,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-16 20:31:35,823 INFO L87 Difference]: Start difference. First operand 309 states and 363 transitions. Second operand has 10 states, 10 states have (on average 6.5) internal successors, (65), 6 states have internal predecessors, (65), 2 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2021-11-16 20:31:36,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:31:36,316 INFO L93 Difference]: Finished difference Result 378 states and 440 transitions. [2021-11-16 20:31:36,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-16 20:31:36,316 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 6 states have internal predecessors, (65), 2 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) Word has length 114 [2021-11-16 20:31:36,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:31:36,317 INFO L225 Difference]: With dead ends: 378 [2021-11-16 20:31:36,317 INFO L226 Difference]: Without dead ends: 328 [2021-11-16 20:31:36,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-11-16 20:31:36,318 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 74 mSDsluCounter, 771 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 950 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-16 20:31:36,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 950 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-16 20:31:36,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-11-16 20:31:36,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 309. [2021-11-16 20:31:36,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 242 states have (on average 1.115702479338843) internal successors, (270), 247 states have internal predecessors, (270), 42 states have call successors, (42), 19 states have call predecessors, (42), 24 states have return successors, (51), 42 states have call predecessors, (51), 41 states have call successors, (51) [2021-11-16 20:31:36,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 363 transitions. [2021-11-16 20:31:36,332 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 363 transitions. Word has length 114 [2021-11-16 20:31:36,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:31:36,332 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 363 transitions. [2021-11-16 20:31:36,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 6 states have internal predecessors, (65), 2 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2021-11-16 20:31:36,333 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 363 transitions. [2021-11-16 20:31:36,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-16 20:31:36,333 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:31:36,333 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:31:36,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-11-16 20:31:36,334 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:31:36,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:31:36,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1849063430, now seen corresponding path program 1 times [2021-11-16 20:31:36,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:31:36,335 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691813012] [2021-11-16 20:31:36,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:31:36,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:31:36,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:36,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:31:36,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:36,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 20:31:36,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:36,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-16 20:31:36,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:36,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:31:36,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:36,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-16 20:31:36,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:36,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-16 20:31:36,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:36,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-16 20:31:36,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:36,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-16 20:31:36,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:36,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:31:36,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:36,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-16 20:31:36,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:36,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-16 20:31:36,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:37,090 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-16 20:31:37,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:31:37,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691813012] [2021-11-16 20:31:37,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691813012] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:31:37,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327297873] [2021-11-16 20:31:37,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:31:37,091 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:31:37,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:31:37,092 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:31:37,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-16 20:31:37,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:37,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 2654 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-16 20:31:37,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:31:37,433 INFO L388 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 [2021-11-16 20:31:37,674 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-16 20:31:37,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-16 20:31:38,595 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-11-16 20:31:38,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 37 [2021-11-16 20:31:39,823 INFO L354 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2021-11-16 20:31:39,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 37 [2021-11-16 20:31:40,925 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aws_add_size_checked_aws_add_u64_checked_~a#1| Int) (|aws_add_size_checked_aws_add_u64_checked_~b#1| Int) (|aws_add_size_checked_aws_add_u64_checked_~r#1.offset| Int)) (= |c_#memory_int| (store |c_old(#memory_int)| |c_aws_add_size_checked_#in~r#1.base| (store (select |c_old(#memory_int)| |c_aws_add_size_checked_#in~r#1.base|) |aws_add_size_checked_aws_add_u64_checked_~r#1.offset| (+ |aws_add_size_checked_aws_add_u64_checked_~b#1| |aws_add_size_checked_aws_add_u64_checked_~a#1|))))) is different from true [2021-11-16 20:31:40,938 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-16 20:31:40,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-11-16 20:31:45,492 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 5 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-16 20:31:45,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:32:07,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327297873] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:32:07,083 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 20:32:07,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25] total 45 [2021-11-16 20:32:07,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669829689] [2021-11-16 20:32:07,083 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 20:32:07,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-16 20:32:07,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:32:07,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-16 20:32:07,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=2048, Unknown=9, NotChecked=92, Total=2352 [2021-11-16 20:32:07,084 INFO L87 Difference]: Start difference. First operand 309 states and 363 transitions. Second operand has 45 states, 43 states have (on average 4.023255813953488) internal successors, (173), 39 states have internal predecessors, (173), 16 states have call successors, (23), 12 states have call predecessors, (23), 12 states have return successors, (22), 14 states have call predecessors, (22), 15 states have call successors, (22) [2021-11-16 20:33:56,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:33:56,421 INFO L93 Difference]: Finished difference Result 535 states and 707 transitions. [2021-11-16 20:33:56,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-11-16 20:33:56,422 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 43 states have (on average 4.023255813953488) internal successors, (173), 39 states have internal predecessors, (173), 16 states have call successors, (23), 12 states have call predecessors, (23), 12 states have return successors, (22), 14 states have call predecessors, (22), 15 states have call successors, (22) Word has length 116 [2021-11-16 20:33:56,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:33:56,424 INFO L225 Difference]: With dead ends: 535 [2021-11-16 20:33:56,424 INFO L226 Difference]: Without dead ends: 508 [2021-11-16 20:33:56,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 149 SyntacticMatches, 14 SemanticMatches, 93 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2794 ImplicationChecksByTransitivity, 128.1s TimeCoverageRelationStatistics Valid=1105, Invalid=7592, Unknown=49, NotChecked=184, Total=8930 [2021-11-16 20:33:56,426 INFO L933 BasicCegarLoop]: 307 mSDtfsCounter, 712 mSDsluCounter, 3231 mSDsCounter, 0 mSdLazyCounter, 3902 mSolverCounterSat, 338 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 733 SdHoareTripleChecker+Valid, 3538 SdHoareTripleChecker+Invalid, 6817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 338 IncrementalHoareTripleChecker+Valid, 3902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2577 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2021-11-16 20:33:56,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [733 Valid, 3538 Invalid, 6817 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [338 Valid, 3902 Invalid, 0 Unknown, 2577 Unchecked, 9.0s Time] [2021-11-16 20:33:56,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-11-16 20:33:56,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 401. [2021-11-16 20:33:56,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 311 states have (on average 1.1221864951768488) internal successors, (349), 317 states have internal predecessors, (349), 59 states have call successors, (59), 23 states have call predecessors, (59), 30 states have return successors, (82), 60 states have call predecessors, (82), 58 states have call successors, (82) [2021-11-16 20:33:56,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 490 transitions. [2021-11-16 20:33:56,481 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 490 transitions. Word has length 116 [2021-11-16 20:33:56,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:33:56,482 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 490 transitions. [2021-11-16 20:33:56,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 43 states have (on average 4.023255813953488) internal successors, (173), 39 states have internal predecessors, (173), 16 states have call successors, (23), 12 states have call predecessors, (23), 12 states have return successors, (22), 14 states have call predecessors, (22), 15 states have call successors, (22) [2021-11-16 20:33:56,482 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 490 transitions. [2021-11-16 20:33:56,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-16 20:33:56,483 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:33:56,483 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:33:56,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-16 20:33:56,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-16 20:33:56,695 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:33:56,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:33:56,696 INFO L85 PathProgramCache]: Analyzing trace with hash 722139514, now seen corresponding path program 1 times [2021-11-16 20:33:56,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:33:56,696 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324779173] [2021-11-16 20:33:56,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:33:56,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:33:56,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:56,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:33:56,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:56,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 20:33:56,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:56,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-16 20:33:56,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:56,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:33:56,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:56,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-16 20:33:56,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:57,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-16 20:33:57,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:57,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-16 20:33:57,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:57,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-16 20:33:57,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:57,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:33:57,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:57,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-16 20:33:57,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:57,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-16 20:33:57,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:57,524 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-16 20:33:57,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:33:57,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324779173] [2021-11-16 20:33:57,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324779173] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:33:57,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78571644] [2021-11-16 20:33:57,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:33:57,525 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:33:57,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:33:57,540 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:33:57,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-16 20:33:57,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:57,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 2644 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-16 20:33:57,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:33:59,555 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 45 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-16 20:33:59,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:34:00,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-11-16 20:34:00,681 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-16 20:34:00,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 26 [2021-11-16 20:34:00,792 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-16 20:34:00,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78571644] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 20:34:00,792 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-16 20:34:00,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 11] total 25 [2021-11-16 20:34:00,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936360241] [2021-11-16 20:34:00,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-16 20:34:00,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-16 20:34:00,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:34:00,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-16 20:34:00,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-11-16 20:34:00,794 INFO L87 Difference]: Start difference. First operand 401 states and 490 transitions. Second operand has 25 states, 25 states have (on average 6.2) internal successors, (155), 20 states have internal predecessors, (155), 7 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (21), 5 states have call predecessors, (21), 7 states have call successors, (21) [2021-11-16 20:34:06,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:34:06,932 INFO L93 Difference]: Finished difference Result 670 states and 832 transitions. [2021-11-16 20:34:06,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-16 20:34:06,933 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 6.2) internal successors, (155), 20 states have internal predecessors, (155), 7 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (21), 5 states have call predecessors, (21), 7 states have call successors, (21) Word has length 116 [2021-11-16 20:34:06,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:34:06,934 INFO L225 Difference]: With dead ends: 670 [2021-11-16 20:34:06,934 INFO L226 Difference]: Without dead ends: 427 [2021-11-16 20:34:06,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 245 SyntacticMatches, 8 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=273, Invalid=1209, Unknown=0, NotChecked=0, Total=1482 [2021-11-16 20:34:06,936 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 306 mSDsluCounter, 1362 mSDsCounter, 0 mSdLazyCounter, 1823 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 1565 SdHoareTripleChecker+Invalid, 2215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 318 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-11-16 20:34:06,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 1565 Invalid, 2215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1823 Invalid, 0 Unknown, 318 Unchecked, 4.4s Time] [2021-11-16 20:34:06,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-11-16 20:34:06,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 382. [2021-11-16 20:34:06,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 296 states have (on average 1.1216216216216217) internal successors, (332), 300 states have internal predecessors, (332), 57 states have call successors, (57), 23 states have call predecessors, (57), 28 states have return successors, (77), 58 states have call predecessors, (77), 56 states have call successors, (77) [2021-11-16 20:34:06,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 466 transitions. [2021-11-16 20:34:06,962 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 466 transitions. Word has length 116 [2021-11-16 20:34:06,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:34:06,962 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 466 transitions. [2021-11-16 20:34:06,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.2) internal successors, (155), 20 states have internal predecessors, (155), 7 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (21), 5 states have call predecessors, (21), 7 states have call successors, (21) [2021-11-16 20:34:06,963 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 466 transitions. [2021-11-16 20:34:06,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-16 20:34:06,964 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:34:06,964 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:34:06,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-16 20:34:07,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-16 20:34:07,186 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:34:07,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:34:07,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1166040188, now seen corresponding path program 1 times [2021-11-16 20:34:07,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:34:07,186 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462727362] [2021-11-16 20:34:07,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:34:07,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:34:07,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:07,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:34:07,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:07,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 20:34:07,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:07,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-16 20:34:07,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:08,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:34:08,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:08,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-16 20:34:08,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:08,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-16 20:34:08,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:08,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-16 20:34:08,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:08,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-16 20:34:08,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:08,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:34:08,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:08,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-16 20:34:08,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:08,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-16 20:34:08,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:08,405 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-16 20:34:08,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:34:08,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462727362] [2021-11-16 20:34:08,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462727362] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:34:08,406 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:34:08,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-16 20:34:08,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206017389] [2021-11-16 20:34:08,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:34:08,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-16 20:34:08,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:34:08,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-16 20:34:08,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-11-16 20:34:08,407 INFO L87 Difference]: Start difference. First operand 382 states and 466 transitions. Second operand has 18 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 15 states have internal predecessors, (63), 7 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2021-11-16 20:34:13,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:34:13,268 INFO L93 Difference]: Finished difference Result 525 states and 654 transitions. [2021-11-16 20:34:13,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-16 20:34:13,269 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 15 states have internal predecessors, (63), 7 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) Word has length 116 [2021-11-16 20:34:13,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:34:13,270 INFO L225 Difference]: With dead ends: 525 [2021-11-16 20:34:13,270 INFO L226 Difference]: Without dead ends: 439 [2021-11-16 20:34:13,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=166, Invalid=890, Unknown=0, NotChecked=0, Total=1056 [2021-11-16 20:34:13,271 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 466 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 1477 mSolverCounterSat, 383 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 1860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 383 IncrementalHoareTripleChecker+Valid, 1477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-11-16 20:34:13,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [474 Valid, 584 Invalid, 1860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [383 Valid, 1477 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-11-16 20:34:13,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-11-16 20:34:13,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 374. [2021-11-16 20:34:13,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 291 states have (on average 1.1168384879725086) internal successors, (325), 295 states have internal predecessors, (325), 55 states have call successors, (55), 22 states have call predecessors, (55), 27 states have return successors, (75), 56 states have call predecessors, (75), 54 states have call successors, (75) [2021-11-16 20:34:13,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 455 transitions. [2021-11-16 20:34:13,296 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 455 transitions. Word has length 116 [2021-11-16 20:34:13,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:34:13,298 INFO L470 AbstractCegarLoop]: Abstraction has 374 states and 455 transitions. [2021-11-16 20:34:13,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 15 states have internal predecessors, (63), 7 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2021-11-16 20:34:13,298 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 455 transitions. [2021-11-16 20:34:13,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-16 20:34:13,299 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:34:13,299 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:34:13,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-11-16 20:34:13,299 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:34:13,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:34:13,300 INFO L85 PathProgramCache]: Analyzing trace with hash -828439065, now seen corresponding path program 1 times [2021-11-16 20:34:13,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:34:13,300 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895962212] [2021-11-16 20:34:13,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:34:13,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:34:13,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:13,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:34:13,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:13,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 20:34:13,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:13,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-16 20:34:13,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:13,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:34:13,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:13,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-16 20:34:13,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:13,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-16 20:34:13,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:13,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-16 20:34:13,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:13,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-16 20:34:13,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:13,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:34:13,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:13,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-16 20:34:13,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:13,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-16 20:34:13,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:13,721 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-16 20:34:13,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:34:13,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895962212] [2021-11-16 20:34:13,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895962212] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:34:13,721 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:34:13,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-16 20:34:13,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506750415] [2021-11-16 20:34:13,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:34:13,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-16 20:34:13,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:34:13,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-16 20:34:13,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-11-16 20:34:13,722 INFO L87 Difference]: Start difference. First operand 374 states and 455 transitions. Second operand has 10 states, 9 states have (on average 7.222222222222222) internal successors, (65), 6 states have internal predecessors, (65), 2 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2021-11-16 20:34:15,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:34:15,247 INFO L93 Difference]: Finished difference Result 395 states and 484 transitions. [2021-11-16 20:34:15,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-16 20:34:15,248 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 7.222222222222222) internal successors, (65), 6 states have internal predecessors, (65), 2 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) Word has length 120 [2021-11-16 20:34:15,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:34:15,249 INFO L225 Difference]: With dead ends: 395 [2021-11-16 20:34:15,249 INFO L226 Difference]: Without dead ends: 393 [2021-11-16 20:34:15,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-11-16 20:34:15,250 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 78 mSDsluCounter, 866 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 1044 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-16 20:34:15,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 1044 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-16 20:34:15,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-11-16 20:34:15,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 384. [2021-11-16 20:34:15,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 297 states have (on average 1.1144781144781144) internal successors, (331), 302 states have internal predecessors, (331), 57 states have call successors, (57), 23 states have call predecessors, (57), 29 states have return successors, (84), 58 states have call predecessors, (84), 56 states have call successors, (84) [2021-11-16 20:34:15,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 472 transitions. [2021-11-16 20:34:15,274 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 472 transitions. Word has length 120 [2021-11-16 20:34:15,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:34:15,275 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 472 transitions. [2021-11-16 20:34:15,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 7.222222222222222) internal successors, (65), 6 states have internal predecessors, (65), 2 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2021-11-16 20:34:15,275 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 472 transitions. [2021-11-16 20:34:15,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-16 20:34:15,280 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:34:15,280 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:34:15,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-11-16 20:34:15,280 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:34:15,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:34:15,281 INFO L85 PathProgramCache]: Analyzing trace with hash -947242963, now seen corresponding path program 1 times [2021-11-16 20:34:15,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:34:15,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651248018] [2021-11-16 20:34:15,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:34:15,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:34:15,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:15,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:34:15,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:15,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 20:34:15,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:15,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-16 20:34:15,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:15,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:34:15,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:15,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-16 20:34:15,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:15,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-16 20:34:15,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:15,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-16 20:34:15,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:15,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-16 20:34:15,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:16,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:34:16,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:16,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-16 20:34:16,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:16,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-16 20:34:16,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:16,477 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-16 20:34:16,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:34:16,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651248018] [2021-11-16 20:34:16,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651248018] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:34:16,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029362975] [2021-11-16 20:34:16,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:34:16,477 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:34:16,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:34:16,479 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:34:16,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-16 20:34:16,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:16,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 2648 conjuncts, 65 conjunts are in the unsatisfiable core [2021-11-16 20:34:16,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:34:16,856 INFO L388 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 [2021-11-16 20:34:17,370 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-16 20:34:17,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-16 20:34:17,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-16 20:34:18,560 INFO L354 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2021-11-16 20:34:18,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 41 [2021-11-16 20:34:20,766 INFO L354 Elim1Store]: treesize reduction 32, result has 34.7 percent of original size [2021-11-16 20:34:20,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 41 [2021-11-16 20:34:22,990 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aws_add_size_checked_aws_add_u64_checked_~r#1.offset| Int)) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_aws_add_size_checked_#in~r#1.base| (store (select |c_old(#memory_$Pointer$.base)| |c_aws_add_size_checked_#in~r#1.base|) |aws_add_size_checked_aws_add_u64_checked_~r#1.offset| (select (select |c_#memory_$Pointer$.base| |c_aws_add_size_checked_#in~r#1.base|) |aws_add_size_checked_aws_add_u64_checked_~r#1.offset|))))) is different from true [2021-11-16 20:34:23,035 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-16 20:34:23,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 24 [2021-11-16 20:34:30,308 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 62 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-16 20:34:30,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:34:33,357 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_aws_add_size_checked_aws_add_u64_checked_~r#1.offset_24| Int) (v_DerPreprocessor_1 Int)) (not (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_aws_byte_buf_reserve_relative_~#requested_capacity~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_aws_byte_buf_reserve_relative_~#requested_capacity~0#1.base|) |v_aws_add_size_checked_aws_add_u64_checked_~r#1.offset_24| v_DerPreprocessor_1)) |c_ULTIMATE.start_aws_byte_buf_reserve_relative_~buffer#1.base|) (+ |c_ULTIMATE.start_aws_byte_buf_reserve_relative_~buffer#1.offset| 8)) 0))) is different from false [2021-11-16 20:34:33,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029362975] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:34:33,359 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 20:34:33,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 36 [2021-11-16 20:34:33,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397604804] [2021-11-16 20:34:33,360 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 20:34:33,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-16 20:34:33,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:34:33,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-16 20:34:33,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1478, Unknown=5, NotChecked=158, Total=1806 [2021-11-16 20:34:33,364 INFO L87 Difference]: Start difference. First operand 384 states and 472 transitions. Second operand has 36 states, 34 states have (on average 4.617647058823529) internal successors, (157), 30 states have internal predecessors, (157), 12 states have call successors, (22), 10 states have call predecessors, (22), 11 states have return successors, (20), 12 states have call predecessors, (20), 12 states have call successors, (20) [2021-11-16 20:35:11,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:35:11,669 INFO L93 Difference]: Finished difference Result 702 states and 927 transitions. [2021-11-16 20:35:11,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-16 20:35:11,669 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 4.617647058823529) internal successors, (157), 30 states have internal predecessors, (157), 12 states have call successors, (22), 10 states have call predecessors, (22), 11 states have return successors, (20), 12 states have call predecessors, (20), 12 states have call successors, (20) Word has length 124 [2021-11-16 20:35:11,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:35:11,671 INFO L225 Difference]: With dead ends: 702 [2021-11-16 20:35:11,671 INFO L226 Difference]: Without dead ends: 495 [2021-11-16 20:35:11,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 157 SyntacticMatches, 8 SemanticMatches, 58 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 968 ImplicationChecksByTransitivity, 48.3s TimeCoverageRelationStatistics Valid=350, Invalid=2952, Unknown=12, NotChecked=226, Total=3540 [2021-11-16 20:35:11,672 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 399 mSDsluCounter, 1187 mSDsCounter, 0 mSdLazyCounter, 1620 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 1399 SdHoareTripleChecker+Invalid, 3029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 1620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1162 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-16 20:35:11,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 1399 Invalid, 3029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 1620 Invalid, 0 Unknown, 1162 Unchecked, 3.3s Time] [2021-11-16 20:35:11,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-11-16 20:35:11,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 409. [2021-11-16 20:35:11,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 319 states have (on average 1.1191222570532915) internal successors, (357), 325 states have internal predecessors, (357), 60 states have call successors, (60), 23 states have call predecessors, (60), 29 states have return successors, (90), 60 states have call predecessors, (90), 59 states have call successors, (90) [2021-11-16 20:35:11,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 507 transitions. [2021-11-16 20:35:11,695 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 507 transitions. Word has length 124 [2021-11-16 20:35:11,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:35:11,696 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 507 transitions. [2021-11-16 20:35:11,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 4.617647058823529) internal successors, (157), 30 states have internal predecessors, (157), 12 states have call successors, (22), 10 states have call predecessors, (22), 11 states have return successors, (20), 12 states have call predecessors, (20), 12 states have call successors, (20) [2021-11-16 20:35:11,696 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 507 transitions. [2021-11-16 20:35:11,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-16 20:35:11,697 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:35:11,697 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:35:11,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-16 20:35:11,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-16 20:35:11,915 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:35:11,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:35:11,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1185857651, now seen corresponding path program 1 times [2021-11-16 20:35:11,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:35:11,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673062644] [2021-11-16 20:35:11,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:35:11,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:35:11,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:35:12,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:35:12,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:35:12,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 20:35:12,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:35:12,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-16 20:35:12,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:35:12,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:35:12,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:35:12,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-16 20:35:12,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:35:12,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-16 20:35:12,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:35:12,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-16 20:35:12,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:35:12,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-16 20:35:12,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:35:12,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:35:12,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:35:12,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-16 20:35:12,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:35:12,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-11-16 20:35:12,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:35:12,246 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-16 20:35:12,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:35:12,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673062644] [2021-11-16 20:35:12,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673062644] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:35:12,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185873404] [2021-11-16 20:35:12,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:35:12,246 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:35:12,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:35:12,247 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:35:12,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-16 20:35:12,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:35:12,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 2665 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-16 20:35:12,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:35:12,854 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-16 20:35:12,854 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 20:35:12,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185873404] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:35:12,855 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 20:35:12,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 10 [2021-11-16 20:35:12,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324155628] [2021-11-16 20:35:12,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:35:12,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-16 20:35:12,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:35:12,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-16 20:35:12,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-16 20:35:12,857 INFO L87 Difference]: Start difference. First operand 409 states and 507 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 6 states have internal predecessors, (80), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-16 20:35:12,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:35:12,986 INFO L93 Difference]: Finished difference Result 620 states and 800 transitions. [2021-11-16 20:35:12,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-16 20:35:12,986 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 6 states have internal predecessors, (80), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) Word has length 128 [2021-11-16 20:35:12,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:35:12,989 INFO L225 Difference]: With dead ends: 620 [2021-11-16 20:35:12,989 INFO L226 Difference]: Without dead ends: 421 [2021-11-16 20:35:12,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 148 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-16 20:35:12,992 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 10 mSDsluCounter, 947 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 1142 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-16 20:35:12,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 1142 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-16 20:35:12,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-11-16 20:35:13,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 416. [2021-11-16 20:35:13,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 325 states have (on average 1.116923076923077) internal successors, (363), 330 states have internal predecessors, (363), 60 states have call successors, (60), 23 states have call predecessors, (60), 30 states have return successors, (101), 62 states have call predecessors, (101), 59 states have call successors, (101) [2021-11-16 20:35:13,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 524 transitions. [2021-11-16 20:35:13,015 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 524 transitions. Word has length 128 [2021-11-16 20:35:13,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:35:13,016 INFO L470 AbstractCegarLoop]: Abstraction has 416 states and 524 transitions. [2021-11-16 20:35:13,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 6 states have internal predecessors, (80), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-16 20:35:13,016 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 524 transitions. [2021-11-16 20:35:13,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-16 20:35:13,017 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:35:13,017 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:35:13,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-16 20:35:13,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:35:13,239 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:35:13,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:35:13,240 INFO L85 PathProgramCache]: Analyzing trace with hash 374394686, now seen corresponding path program 1 times [2021-11-16 20:35:13,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:35:13,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371926838] [2021-11-16 20:35:13,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:35:13,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:35:13,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:35:13,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:35:13,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:35:13,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 20:35:13,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:35:13,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-16 20:35:13,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:35:14,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:35:14,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:35:14,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-16 20:35:14,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:35:14,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-16 20:35:14,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:35:14,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-16 20:35:14,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:35:14,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-16 20:35:14,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:35:14,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:35:14,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:35:14,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-16 20:35:14,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:35:14,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-11-16 20:35:14,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:35:15,065 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 28 proven. 45 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-16 20:35:15,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:35:15,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371926838] [2021-11-16 20:35:15,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371926838] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:35:15,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185602157] [2021-11-16 20:35:15,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:35:15,066 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:35:15,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:35:15,067 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:35:15,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-16 20:35:15,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:35:15,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 2657 conjuncts, 79 conjunts are in the unsatisfiable core [2021-11-16 20:35:15,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:35:15,408 INFO L388 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 [2021-11-16 20:35:16,205 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-16 20:35:16,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-16 20:35:16,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-16 20:35:18,831 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-11-16 20:35:18,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 37 [2021-11-16 20:35:21,751 INFO L354 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2021-11-16 20:35:21,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 37 [2021-11-16 20:35:23,919 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aws_add_size_checked_aws_add_u64_checked_~a#1| Int) (|aws_add_size_checked_aws_add_u64_checked_~b#1| Int) (|aws_add_size_checked_aws_add_u64_checked_~r#1.offset| Int)) (= |c_#memory_int| (store |c_old(#memory_int)| |c_aws_add_size_checked_#in~r#1.base| (store (select |c_old(#memory_int)| |c_aws_add_size_checked_#in~r#1.base|) |aws_add_size_checked_aws_add_u64_checked_~r#1.offset| (+ |aws_add_size_checked_aws_add_u64_checked_~b#1| |aws_add_size_checked_aws_add_u64_checked_~a#1|))))) is different from true [2021-11-16 20:35:23,966 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-16 20:35:23,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2021-11-16 20:35:33,414 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 19 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-16 20:35:33,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:36:19,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185602157] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:36:19,433 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 20:36:19,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 27] total 42 [2021-11-16 20:36:19,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953071784] [2021-11-16 20:36:19,433 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 20:36:19,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-16 20:36:19,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:36:19,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-16 20:36:19,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1953, Unknown=21, NotChecked=90, Total=2256 [2021-11-16 20:36:19,435 INFO L87 Difference]: Start difference. First operand 416 states and 524 transitions. Second operand has 42 states, 40 states have (on average 4.425) internal successors, (177), 35 states have internal predecessors, (177), 14 states have call successors, (22), 11 states have call predecessors, (22), 13 states have return successors, (20), 12 states have call predecessors, (20), 13 states have call successors, (20) [2021-11-16 20:37:15,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:37:15,989 INFO L93 Difference]: Finished difference Result 620 states and 777 transitions. [2021-11-16 20:37:15,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-16 20:37:15,990 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 40 states have (on average 4.425) internal successors, (177), 35 states have internal predecessors, (177), 14 states have call successors, (22), 11 states have call predecessors, (22), 13 states have return successors, (20), 12 states have call predecessors, (20), 13 states have call successors, (20) Word has length 130 [2021-11-16 20:37:15,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:37:15,992 INFO L225 Difference]: With dead ends: 620 [2021-11-16 20:37:15,992 INFO L226 Difference]: Without dead ends: 502 [2021-11-16 20:37:15,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 175 SyntacticMatches, 8 SemanticMatches, 70 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1606 ImplicationChecksByTransitivity, 112.6s TimeCoverageRelationStatistics Valid=421, Invalid=4512, Unknown=41, NotChecked=138, Total=5112 [2021-11-16 20:37:15,994 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 375 mSDsluCounter, 2082 mSDsCounter, 0 mSdLazyCounter, 1583 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 2279 SdHoareTripleChecker+Invalid, 3580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 1583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1850 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-11-16 20:37:15,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [394 Valid, 2279 Invalid, 3580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 1583 Invalid, 0 Unknown, 1850 Unchecked, 3.9s Time] [2021-11-16 20:37:15,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-11-16 20:37:16,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 427. [2021-11-16 20:37:16,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 336 states have (on average 1.119047619047619) internal successors, (376), 343 states have internal predecessors, (376), 58 states have call successors, (58), 23 states have call predecessors, (58), 32 states have return successors, (84), 60 states have call predecessors, (84), 57 states have call successors, (84) [2021-11-16 20:37:16,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 518 transitions. [2021-11-16 20:37:16,017 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 518 transitions. Word has length 130 [2021-11-16 20:37:16,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:37:16,018 INFO L470 AbstractCegarLoop]: Abstraction has 427 states and 518 transitions. [2021-11-16 20:37:16,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 40 states have (on average 4.425) internal successors, (177), 35 states have internal predecessors, (177), 14 states have call successors, (22), 11 states have call predecessors, (22), 13 states have return successors, (20), 12 states have call predecessors, (20), 13 states have call successors, (20) [2021-11-16 20:37:16,018 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 518 transitions. [2021-11-16 20:37:16,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-16 20:37:16,019 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:37:16,019 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:37:16,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-16 20:37:16,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-16 20:37:16,238 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:37:16,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:37:16,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1292143676, now seen corresponding path program 1 times [2021-11-16 20:37:16,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:37:16,239 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163856158] [2021-11-16 20:37:16,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:37:16,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:37:16,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:37:16,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:37:16,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:37:16,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 20:37:16,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:37:16,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-16 20:37:16,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:37:16,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:37:16,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:37:16,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-16 20:37:16,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:37:16,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-16 20:37:16,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:37:16,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-16 20:37:16,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:37:16,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-16 20:37:16,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:37:16,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:37:16,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:37:16,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-16 20:37:16,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:37:16,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-11-16 20:37:16,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:37:16,897 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 60 proven. 7 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-16 20:37:16,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:37:16,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163856158] [2021-11-16 20:37:16,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163856158] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:37:16,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69145532] [2021-11-16 20:37:16,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:37:16,898 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:37:16,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:37:16,899 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:37:16,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-16 20:37:17,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:37:17,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 2664 conjuncts, 102 conjunts are in the unsatisfiable core [2021-11-16 20:37:17,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:37:17,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-16 20:37:21,198 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aws_add_size_checked_aws_add_u64_checked_~a#1| Int) (|aws_add_size_checked_aws_add_u64_checked_~b#1| Int) (|aws_add_size_checked_aws_add_u64_checked_~r#1.offset| Int)) (= |c_#memory_int| (store |c_old(#memory_int)| |c_aws_add_size_checked_#in~r#1.base| (store (select |c_old(#memory_int)| |c_aws_add_size_checked_#in~r#1.base|) |aws_add_size_checked_aws_add_u64_checked_~r#1.offset| (+ |aws_add_size_checked_aws_add_u64_checked_~b#1| |aws_add_size_checked_aws_add_u64_checked_~a#1|))))) is different from true [2021-11-16 20:37:21,346 INFO L354 Elim1Store]: treesize reduction 36, result has 46.3 percent of original size [2021-11-16 20:37:21,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 47 [2021-11-16 20:37:23,886 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 44 proven. 48 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-16 20:37:23,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:37:26,992 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 60 proven. 14 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-16 20:37:26,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69145532] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 20:37:26,993 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-16 20:37:26,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 28, 12] total 47 [2021-11-16 20:37:26,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668154108] [2021-11-16 20:37:26,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-16 20:37:26,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-16 20:37:26,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:37:26,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-16 20:37:26,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1883, Unknown=1, NotChecked=88, Total=2162 [2021-11-16 20:37:26,994 INFO L87 Difference]: Start difference. First operand 427 states and 518 transitions. Second operand has 47 states, 45 states have (on average 4.222222222222222) internal successors, (190), 42 states have internal predecessors, (190), 13 states have call successors, (26), 7 states have call predecessors, (26), 9 states have return successors, (23), 10 states have call predecessors, (23), 12 states have call successors, (23) [2021-11-16 20:37:47,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:37:47,840 INFO L93 Difference]: Finished difference Result 1054 states and 1416 transitions. [2021-11-16 20:37:47,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-11-16 20:37:47,840 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 45 states have (on average 4.222222222222222) internal successors, (190), 42 states have internal predecessors, (190), 13 states have call successors, (26), 7 states have call predecessors, (26), 9 states have return successors, (23), 10 states have call predecessors, (23), 12 states have call successors, (23) Word has length 130 [2021-11-16 20:37:47,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:37:47,843 INFO L225 Difference]: With dead ends: 1054 [2021-11-16 20:37:47,843 INFO L226 Difference]: Without dead ends: 893 [2021-11-16 20:37:47,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 268 SyntacticMatches, 21 SemanticMatches, 91 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3289 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=1185, Invalid=7190, Unknown=1, NotChecked=180, Total=8556 [2021-11-16 20:37:47,845 INFO L933 BasicCegarLoop]: 274 mSDtfsCounter, 715 mSDsluCounter, 3051 mSDsCounter, 0 mSdLazyCounter, 4194 mSolverCounterSat, 507 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 737 SdHoareTripleChecker+Valid, 3325 SdHoareTripleChecker+Invalid, 7030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 507 IncrementalHoareTripleChecker+Valid, 4194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2329 IncrementalHoareTripleChecker+Unchecked, 12.3s IncrementalHoareTripleChecker+Time [2021-11-16 20:37:47,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [737 Valid, 3325 Invalid, 7030 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [507 Valid, 4194 Invalid, 0 Unknown, 2329 Unchecked, 12.3s Time] [2021-11-16 20:37:47,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2021-11-16 20:37:47,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 551. [2021-11-16 20:37:47,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 551 states, 440 states have (on average 1.1318181818181818) internal successors, (498), 451 states have internal predecessors, (498), 75 states have call successors, (75), 27 states have call predecessors, (75), 35 states have return successors, (108), 72 states have call predecessors, (108), 74 states have call successors, (108) [2021-11-16 20:37:47,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 681 transitions. [2021-11-16 20:37:47,881 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 681 transitions. Word has length 130 [2021-11-16 20:37:47,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:37:47,881 INFO L470 AbstractCegarLoop]: Abstraction has 551 states and 681 transitions. [2021-11-16 20:37:47,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 45 states have (on average 4.222222222222222) internal successors, (190), 42 states have internal predecessors, (190), 13 states have call successors, (26), 7 states have call predecessors, (26), 9 states have return successors, (23), 10 states have call predecessors, (23), 12 states have call successors, (23) [2021-11-16 20:37:47,882 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 681 transitions. [2021-11-16 20:37:47,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-16 20:37:47,883 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:37:47,883 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:37:47,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-16 20:37:48,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-11-16 20:37:48,100 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:37:48,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:37:48,100 INFO L85 PathProgramCache]: Analyzing trace with hash -95159543, now seen corresponding path program 1 times [2021-11-16 20:37:48,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:37:48,100 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727635184] [2021-11-16 20:37:48,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:37:48,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:37:48,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:37:48,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:37:48,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:37:48,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 20:37:48,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:37:48,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-16 20:37:48,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:37:48,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:37:48,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:37:48,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-16 20:37:48,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:37:48,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-16 20:37:48,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:37:48,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-16 20:37:48,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:37:48,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-16 20:37:48,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:37:48,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:37:48,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:37:48,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-16 20:37:48,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:37:48,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-11-16 20:37:48,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:37:48,630 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-16 20:37:48,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:37:48,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727635184] [2021-11-16 20:37:48,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727635184] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:37:48,631 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:37:48,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-16 20:37:48,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018215403] [2021-11-16 20:37:48,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:37:48,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-16 20:37:48,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:37:48,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-16 20:37:48,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-11-16 20:37:48,632 INFO L87 Difference]: Start difference. First operand 551 states and 681 transitions. Second operand has 12 states, 11 states have (on average 5.909090909090909) internal successors, (65), 8 states have internal predecessors, (65), 2 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2021-11-16 20:37:50,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:37:50,698 INFO L93 Difference]: Finished difference Result 586 states and 721 transitions. [2021-11-16 20:37:50,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-16 20:37:50,698 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 5.909090909090909) internal successors, (65), 8 states have internal predecessors, (65), 2 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) Word has length 132 [2021-11-16 20:37:50,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:37:50,700 INFO L225 Difference]: With dead ends: 586 [2021-11-16 20:37:50,700 INFO L226 Difference]: Without dead ends: 584 [2021-11-16 20:37:50,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-11-16 20:37:50,701 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 85 mSDsluCounter, 1140 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 1315 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-16 20:37:50,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 1315 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 681 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-16 20:37:50,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-11-16 20:37:50,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 563. [2021-11-16 20:37:50,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 448 states have (on average 1.1294642857142858) internal successors, (506), 460 states have internal predecessors, (506), 77 states have call successors, (77), 28 states have call predecessors, (77), 37 states have return successors, (112), 74 states have call predecessors, (112), 76 states have call successors, (112) [2021-11-16 20:37:50,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 695 transitions. [2021-11-16 20:37:50,755 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 695 transitions. Word has length 132 [2021-11-16 20:37:50,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:37:50,756 INFO L470 AbstractCegarLoop]: Abstraction has 563 states and 695 transitions. [2021-11-16 20:37:50,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 5.909090909090909) internal successors, (65), 8 states have internal predecessors, (65), 2 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2021-11-16 20:37:50,757 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 695 transitions. [2021-11-16 20:37:50,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-16 20:37:50,758 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:37:50,758 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-11-16 20:37:50,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-11-16 20:37:50,758 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:37:50,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:37:50,759 INFO L85 PathProgramCache]: Analyzing trace with hash 605905035, now seen corresponding path program 2 times [2021-11-16 20:37:50,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:37:50,759 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808373485] [2021-11-16 20:37:50,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:37:50,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:37:50,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:37:50,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:37:50,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:37:50,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 20:37:50,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:37:50,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-16 20:37:50,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:37:50,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:37:50,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:37:50,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-16 20:37:50,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:37:50,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-16 20:37:50,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:37:50,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-16 20:37:50,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:37:51,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-16 20:37:51,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:37:51,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:37:51,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:37:51,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-16 20:37:51,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:37:51,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-11-16 20:37:51,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:37:51,499 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 64 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-16 20:37:51,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:37:51,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808373485] [2021-11-16 20:37:51,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808373485] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:37:51,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647819592] [2021-11-16 20:37:51,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-16 20:37:51,500 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:37:51,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:37:51,501 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:37:51,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-16 20:37:52,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-16 20:37:52,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-16 20:37:52,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 2674 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-16 20:37:52,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:37:54,287 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 77 proven. 6 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-16 20:37:54,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:37:55,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2021-11-16 20:37:55,365 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-16 20:37:55,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2021-11-16 20:37:55,560 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 64 proven. 16 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-16 20:37:55,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647819592] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 20:37:55,561 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-16 20:37:55,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 10] total 24 [2021-11-16 20:37:55,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522537862] [2021-11-16 20:37:55,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-16 20:37:55,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-16 20:37:55,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:37:55,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-16 20:37:55,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-11-16 20:37:55,562 INFO L87 Difference]: Start difference. First operand 563 states and 695 transitions. Second operand has 24 states, 24 states have (on average 5.833333333333333) internal successors, (140), 21 states have internal predecessors, (140), 7 states have call successors, (24), 5 states have call predecessors, (24), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2021-11-16 20:38:01,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:38:01,240 INFO L93 Difference]: Finished difference Result 758 states and 944 transitions. [2021-11-16 20:38:01,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-16 20:38:01,245 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.833333333333333) internal successors, (140), 21 states have internal predecessors, (140), 7 states have call successors, (24), 5 states have call predecessors, (24), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 132 [2021-11-16 20:38:01,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:38:01,247 INFO L225 Difference]: With dead ends: 758 [2021-11-16 20:38:01,247 INFO L226 Difference]: Without dead ends: 648 [2021-11-16 20:38:01,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 280 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=234, Invalid=1326, Unknown=0, NotChecked=0, Total=1560 [2021-11-16 20:38:01,248 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 292 mSDsluCounter, 1257 mSDsCounter, 0 mSdLazyCounter, 1416 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 1455 SdHoareTripleChecker+Invalid, 2018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 1416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 413 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-11-16 20:38:01,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 1455 Invalid, 2018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 1416 Invalid, 0 Unknown, 413 Unchecked, 3.7s Time] [2021-11-16 20:38:01,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2021-11-16 20:38:01,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 557. [2021-11-16 20:38:01,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 443 states have (on average 1.1286681715575622) internal successors, (500), 454 states have internal predecessors, (500), 77 states have call successors, (77), 28 states have call predecessors, (77), 36 states have return successors, (110), 74 states have call predecessors, (110), 76 states have call successors, (110) [2021-11-16 20:38:01,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 687 transitions. [2021-11-16 20:38:01,282 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 687 transitions. Word has length 132 [2021-11-16 20:38:01,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:38:01,283 INFO L470 AbstractCegarLoop]: Abstraction has 557 states and 687 transitions. [2021-11-16 20:38:01,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.833333333333333) internal successors, (140), 21 states have internal predecessors, (140), 7 states have call successors, (24), 5 states have call predecessors, (24), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2021-11-16 20:38:01,284 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 687 transitions. [2021-11-16 20:38:01,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-16 20:38:01,285 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:38:01,285 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:38:01,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-16 20:38:01,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-11-16 20:38:01,518 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:38:01,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:38:01,518 INFO L85 PathProgramCache]: Analyzing trace with hash 533518477, now seen corresponding path program 1 times [2021-11-16 20:38:01,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:38:01,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990390163] [2021-11-16 20:38:01,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:38:01,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:38:01,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:02,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:38:02,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:02,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 20:38:02,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:02,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-16 20:38:02,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:02,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:38:02,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:02,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-16 20:38:02,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:02,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-16 20:38:02,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:02,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-16 20:38:02,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:02,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-16 20:38:02,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:02,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:38:02,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:02,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-16 20:38:02,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:02,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-11-16 20:38:02,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:03,492 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-16 20:38:03,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:38:03,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990390163] [2021-11-16 20:38:03,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990390163] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:38:03,493 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:38:03,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-11-16 20:38:03,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681200905] [2021-11-16 20:38:03,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:38:03,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-16 20:38:03,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:38:03,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-16 20:38:03,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=499, Unknown=0, NotChecked=0, Total=552 [2021-11-16 20:38:03,494 INFO L87 Difference]: Start difference. First operand 557 states and 687 transitions. Second operand has 24 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 19 states have internal predecessors, (74), 8 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (11), 9 states have call predecessors, (11), 7 states have call successors, (11) [2021-11-16 20:38:13,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:38:13,743 INFO L93 Difference]: Finished difference Result 758 states and 1027 transitions. [2021-11-16 20:38:13,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-16 20:38:13,743 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 19 states have internal predecessors, (74), 8 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (11), 9 states have call predecessors, (11), 7 states have call successors, (11) Word has length 132 [2021-11-16 20:38:13,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:38:13,746 INFO L225 Difference]: With dead ends: 758 [2021-11-16 20:38:13,746 INFO L226 Difference]: Without dead ends: 756 [2021-11-16 20:38:13,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=287, Invalid=1969, Unknown=0, NotChecked=0, Total=2256 [2021-11-16 20:38:13,748 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 342 mSDsluCounter, 1332 mSDsCounter, 0 mSdLazyCounter, 3672 mSolverCounterSat, 302 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 1506 SdHoareTripleChecker+Invalid, 3974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 302 IncrementalHoareTripleChecker+Valid, 3672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2021-11-16 20:38:13,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [354 Valid, 1506 Invalid, 3974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [302 Valid, 3672 Invalid, 0 Unknown, 0 Unchecked, 7.8s Time] [2021-11-16 20:38:13,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2021-11-16 20:38:13,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 555. [2021-11-16 20:38:13,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 443 states have (on average 1.1286681715575622) internal successors, (500), 454 states have internal predecessors, (500), 75 states have call successors, (75), 28 states have call predecessors, (75), 36 states have return successors, (108), 72 states have call predecessors, (108), 74 states have call successors, (108) [2021-11-16 20:38:13,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 683 transitions. [2021-11-16 20:38:13,806 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 683 transitions. Word has length 132 [2021-11-16 20:38:13,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:38:13,806 INFO L470 AbstractCegarLoop]: Abstraction has 555 states and 683 transitions. [2021-11-16 20:38:13,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 19 states have internal predecessors, (74), 8 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (11), 9 states have call predecessors, (11), 7 states have call successors, (11) [2021-11-16 20:38:13,806 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 683 transitions. [2021-11-16 20:38:13,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-16 20:38:13,808 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:38:13,808 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:38:13,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-11-16 20:38:13,808 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:38:13,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:38:13,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1532311428, now seen corresponding path program 1 times [2021-11-16 20:38:13,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:38:13,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991647487] [2021-11-16 20:38:13,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:38:13,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:38:14,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:14,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:38:14,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:14,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 20:38:14,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:14,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-16 20:38:14,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:14,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:38:14,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:14,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-16 20:38:14,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:14,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-16 20:38:14,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:14,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-16 20:38:14,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:14,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-16 20:38:14,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:15,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:38:15,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:15,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-16 20:38:15,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:15,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-11-16 20:38:15,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:15,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-16 20:38:15,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:15,647 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 14 proven. 57 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-16 20:38:15,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:38:15,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991647487] [2021-11-16 20:38:15,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991647487] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:38:15,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033998108] [2021-11-16 20:38:15,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:38:15,648 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:38:15,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:38:15,649 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:38:15,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-16 20:38:15,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:15,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 2685 conjuncts, 77 conjunts are in the unsatisfiable core [2021-11-16 20:38:15,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:38:16,007 INFO L388 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 [2021-11-16 20:38:16,903 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-16 20:38:16,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-16 20:38:16,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-16 20:38:17,618 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-16 20:38:17,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-16 20:38:19,721 INFO L354 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2021-11-16 20:38:19,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 29 [2021-11-16 20:38:22,052 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aws_add_size_checked_aws_add_u64_checked_~a#1| Int) (|aws_add_size_checked_aws_add_u64_checked_~b#1| Int) (|aws_add_size_checked_aws_add_u64_checked_~r#1.offset| Int)) (= |c_#memory_int| (store |c_old(#memory_int)| |c_aws_add_size_checked_#in~r#1.base| (store (select |c_old(#memory_int)| |c_aws_add_size_checked_#in~r#1.base|) |aws_add_size_checked_aws_add_u64_checked_~r#1.offset| (+ |aws_add_size_checked_aws_add_u64_checked_~b#1| |aws_add_size_checked_aws_add_u64_checked_~a#1|))))) is different from true [2021-11-16 20:38:22,102 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-16 20:38:22,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2021-11-16 20:38:25,175 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 66 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-16 20:38:25,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:38:52,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033998108] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:38:52,849 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 20:38:52,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 24] total 40 [2021-11-16 20:38:52,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356269495] [2021-11-16 20:38:52,849 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 20:38:52,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-16 20:38:52,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:38:52,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-16 20:38:52,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1807, Unknown=12, NotChecked=86, Total=2070 [2021-11-16 20:38:52,850 INFO L87 Difference]: Start difference. First operand 555 states and 683 transitions. Second operand has 40 states, 37 states have (on average 5.027027027027027) internal successors, (186), 33 states have internal predecessors, (186), 16 states have call successors, (25), 10 states have call predecessors, (25), 10 states have return successors, (24), 11 states have call predecessors, (24), 16 states have call successors, (24) [2021-11-16 20:39:39,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:39:39,213 INFO L93 Difference]: Finished difference Result 808 states and 1037 transitions. [2021-11-16 20:39:39,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-16 20:39:39,214 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 37 states have (on average 5.027027027027027) internal successors, (186), 33 states have internal predecessors, (186), 16 states have call successors, (25), 10 states have call predecessors, (25), 10 states have return successors, (24), 11 states have call predecessors, (24), 16 states have call successors, (24) Word has length 134 [2021-11-16 20:39:39,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:39:39,216 INFO L225 Difference]: With dead ends: 808 [2021-11-16 20:39:39,216 INFO L226 Difference]: Without dead ends: 679 [2021-11-16 20:39:39,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 179 SyntacticMatches, 11 SemanticMatches, 73 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1790 ImplicationChecksByTransitivity, 77.5s TimeCoverageRelationStatistics Valid=461, Invalid=4917, Unknown=28, NotChecked=144, Total=5550 [2021-11-16 20:39:39,218 INFO L933 BasicCegarLoop]: 224 mSDtfsCounter, 484 mSDsluCounter, 1780 mSDsCounter, 0 mSdLazyCounter, 1579 mSolverCounterSat, 277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 491 SdHoareTripleChecker+Valid, 2004 SdHoareTripleChecker+Invalid, 3759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 1579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1903 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-11-16 20:39:39,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [491 Valid, 2004 Invalid, 3759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 1579 Invalid, 0 Unknown, 1903 Unchecked, 4.0s Time] [2021-11-16 20:39:39,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2021-11-16 20:39:39,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 536. [2021-11-16 20:39:39,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 425 states have (on average 1.1223529411764706) internal successors, (477), 435 states have internal predecessors, (477), 75 states have call successors, (75), 28 states have call predecessors, (75), 35 states have return successors, (106), 72 states have call predecessors, (106), 74 states have call successors, (106) [2021-11-16 20:39:39,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 658 transitions. [2021-11-16 20:39:39,277 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 658 transitions. Word has length 134 [2021-11-16 20:39:39,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:39:39,277 INFO L470 AbstractCegarLoop]: Abstraction has 536 states and 658 transitions. [2021-11-16 20:39:39,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 37 states have (on average 5.027027027027027) internal successors, (186), 33 states have internal predecessors, (186), 16 states have call successors, (25), 10 states have call predecessors, (25), 10 states have return successors, (24), 11 states have call predecessors, (24), 16 states have call successors, (24) [2021-11-16 20:39:39,277 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 658 transitions. [2021-11-16 20:39:39,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-16 20:39:39,278 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:39:39,279 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:39:39,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-16 20:39:39,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:39:39,487 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:39:39,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:39:39,488 INFO L85 PathProgramCache]: Analyzing trace with hash -2065693428, now seen corresponding path program 1 times [2021-11-16 20:39:39,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:39:39,488 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922230282] [2021-11-16 20:39:39,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:39:39,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:39:40,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:39:40,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:39:40,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:39:40,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 20:39:40,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:39:40,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-16 20:39:40,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:39:40,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:39:40,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:39:40,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-16 20:39:40,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:39:40,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-16 20:39:40,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:39:40,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-16 20:39:40,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:39:41,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-16 20:39:41,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:39:41,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:39:41,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:39:41,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-16 20:39:41,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:39:41,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-11-16 20:39:41,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:39:41,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-16 20:39:41,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:39:42,006 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 15 proven. 70 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-16 20:39:42,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:39:42,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922230282] [2021-11-16 20:39:42,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922230282] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:39:42,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938026490] [2021-11-16 20:39:42,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:39:42,006 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:39:42,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:39:42,007 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:39:42,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-16 20:39:42,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:39:42,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 2687 conjuncts, 75 conjunts are in the unsatisfiable core [2021-11-16 20:39:42,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:39:42,385 INFO L388 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 [2021-11-16 20:39:43,355 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-16 20:39:43,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-16 20:39:43,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-16 20:39:45,012 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-11-16 20:39:45,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 37 [2021-11-16 20:39:48,458 INFO L354 Elim1Store]: treesize reduction 64, result has 21.0 percent of original size [2021-11-16 20:39:48,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 38 treesize of output 44 [2021-11-16 20:39:50,752 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aws_add_size_checked_aws_add_u64_checked_~a#1| Int) (|aws_add_size_checked_aws_add_u64_checked_~b#1| Int) (|aws_add_size_checked_aws_add_u64_checked_~r#1.offset| Int)) (= |c_#memory_int| (store |c_old(#memory_int)| |c_aws_add_size_checked_#in~r#1.base| (store (select |c_old(#memory_int)| |c_aws_add_size_checked_#in~r#1.base|) |aws_add_size_checked_aws_add_u64_checked_~r#1.offset| (+ |aws_add_size_checked_aws_add_u64_checked_~b#1| |aws_add_size_checked_aws_add_u64_checked_~a#1|))))) is different from true [2021-11-16 20:39:50,799 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-16 20:39:50,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2021-11-16 20:39:58,518 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 35 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-16 20:39:58,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:40:01,487 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_aws_add_size_checked_aws_add_u64_checked_~b#1_41| Int) (|v_aws_add_size_checked_aws_add_u64_checked_~a#1_41| Int) (|v_aws_add_size_checked_aws_add_u64_checked_~r#1.offset_39| Int)) (not (= (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_aws_byte_buf_reserve_relative_~#requested_capacity~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_aws_byte_buf_reserve_relative_~#requested_capacity~0#1.base|) |v_aws_add_size_checked_aws_add_u64_checked_~r#1.offset_39| (+ |v_aws_add_size_checked_aws_add_u64_checked_~a#1_41| |v_aws_add_size_checked_aws_add_u64_checked_~b#1_41|))) |c_ULTIMATE.start_aws_byte_buf_reserve_relative_harness_~#buf~3#1.base|) (+ 16 |c_ULTIMATE.start_aws_byte_buf_reserve_relative_harness_~#buf~3#1.offset|)) 18446744073709551616) 0))) is different from false [2021-11-16 20:40:01,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938026490] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:40:01,490 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 20:40:01,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 46 [2021-11-16 20:40:01,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754587958] [2021-11-16 20:40:01,491 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 20:40:01,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-16 20:40:01,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:40:01,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-16 20:40:01,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=2145, Unknown=3, NotChecked=190, Total=2550 [2021-11-16 20:40:01,492 INFO L87 Difference]: Start difference. First operand 536 states and 658 transitions. Second operand has 46 states, 43 states have (on average 4.674418604651163) internal successors, (201), 40 states have internal predecessors, (201), 15 states have call successors, (25), 11 states have call predecessors, (25), 12 states have return successors, (23), 12 states have call predecessors, (23), 14 states have call successors, (23) [2021-11-16 20:41:42,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:41:42,986 INFO L93 Difference]: Finished difference Result 716 states and 923 transitions. [2021-11-16 20:41:42,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-11-16 20:41:42,987 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 43 states have (on average 4.674418604651163) internal successors, (201), 40 states have internal predecessors, (201), 15 states have call successors, (25), 11 states have call predecessors, (25), 12 states have return successors, (23), 12 states have call predecessors, (23), 14 states have call successors, (23) Word has length 134 [2021-11-16 20:41:42,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:41:42,989 INFO L225 Difference]: With dead ends: 716 [2021-11-16 20:41:42,989 INFO L226 Difference]: Without dead ends: 697 [2021-11-16 20:41:42,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 179 SyntacticMatches, 16 SemanticMatches, 97 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 3505 ImplicationChecksByTransitivity, 109.8s TimeCoverageRelationStatistics Valid=1042, Invalid=8234, Unknown=44, NotChecked=382, Total=9702 [2021-11-16 20:41:42,990 INFO L933 BasicCegarLoop]: 294 mSDtfsCounter, 595 mSDsluCounter, 2039 mSDsCounter, 0 mSdLazyCounter, 2860 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 627 SdHoareTripleChecker+Valid, 2333 SdHoareTripleChecker+Invalid, 4865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 2860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1736 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2021-11-16 20:41:42,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [627 Valid, 2333 Invalid, 4865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 2860 Invalid, 0 Unknown, 1736 Unchecked, 7.0s Time] [2021-11-16 20:41:42,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2021-11-16 20:41:43,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 545. [2021-11-16 20:41:43,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 433 states have (on average 1.120092378752887) internal successors, (485), 442 states have internal predecessors, (485), 75 states have call successors, (75), 30 states have call predecessors, (75), 36 states have return successors, (101), 72 states have call predecessors, (101), 74 states have call successors, (101) [2021-11-16 20:41:43,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 661 transitions. [2021-11-16 20:41:43,028 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 661 transitions. Word has length 134 [2021-11-16 20:41:43,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:41:43,028 INFO L470 AbstractCegarLoop]: Abstraction has 545 states and 661 transitions. [2021-11-16 20:41:43,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 43 states have (on average 4.674418604651163) internal successors, (201), 40 states have internal predecessors, (201), 15 states have call successors, (25), 11 states have call predecessors, (25), 12 states have return successors, (23), 12 states have call predecessors, (23), 14 states have call successors, (23) [2021-11-16 20:41:43,029 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 661 transitions. [2021-11-16 20:41:43,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-16 20:41:43,030 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:41:43,030 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:41:43,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-16 20:41:43,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:41:43,250 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:41:43,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:41:43,250 INFO L85 PathProgramCache]: Analyzing trace with hash 2087924170, now seen corresponding path program 2 times [2021-11-16 20:41:43,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:41:43,250 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139510490] [2021-11-16 20:41:43,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:41:43,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:41:43,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:41:43,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:41:43,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:41:43,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 20:41:43,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:41:43,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-16 20:41:43,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:41:43,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:41:43,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:41:43,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-16 20:41:43,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:41:43,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-16 20:41:43,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:41:43,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-16 20:41:43,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:41:43,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-16 20:41:43,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:41:43,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:41:43,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:41:43,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-16 20:41:43,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:41:43,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-11-16 20:41:43,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:41:43,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-16 20:41:43,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:41:44,140 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 58 proven. 10 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-16 20:41:44,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:41:44,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139510490] [2021-11-16 20:41:44,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139510490] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:41:44,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078973122] [2021-11-16 20:41:44,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-16 20:41:44,141 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:41:44,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:41:44,142 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:41:44,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-16 20:41:47,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-16 20:41:47,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-16 20:41:47,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 2682 conjuncts, 98 conjunts are in the unsatisfiable core [2021-11-16 20:41:47,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:41:47,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-16 20:41:50,815 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aws_add_size_checked_aws_add_u64_checked_~a#1| Int) (|aws_add_size_checked_aws_add_u64_checked_~b#1| Int) (|aws_add_size_checked_aws_add_u64_checked_~r#1.offset| Int)) (= |c_#memory_int| (store |c_old(#memory_int)| |c_aws_add_size_checked_#in~r#1.base| (store (select |c_old(#memory_int)| |c_aws_add_size_checked_#in~r#1.base|) |aws_add_size_checked_aws_add_u64_checked_~r#1.offset| (+ |aws_add_size_checked_aws_add_u64_checked_~b#1| |aws_add_size_checked_aws_add_u64_checked_~a#1|))))) is different from true [2021-11-16 20:41:50,891 INFO L354 Elim1Store]: treesize reduction 23, result has 45.2 percent of original size [2021-11-16 20:41:50,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 35 [2021-11-16 20:41:53,899 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 59 proven. 24 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-16 20:41:53,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:42:25,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078973122] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:42:25,638 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 20:42:25,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 25] total 38 [2021-11-16 20:42:25,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083362326] [2021-11-16 20:42:25,638 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 20:42:25,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-16 20:42:25,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:42:25,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-16 20:42:25,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=2428, Unknown=13, NotChecked=100, Total=2756 [2021-11-16 20:42:25,639 INFO L87 Difference]: Start difference. First operand 545 states and 661 transitions. Second operand has 38 states, 37 states have (on average 4.243243243243243) internal successors, (157), 34 states have internal predecessors, (157), 13 states have call successors, (24), 7 states have call predecessors, (24), 8 states have return successors, (23), 10 states have call predecessors, (23), 12 states have call successors, (23) [2021-11-16 20:43:56,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:43:56,961 INFO L93 Difference]: Finished difference Result 877 states and 1166 transitions. [2021-11-16 20:43:56,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-16 20:43:56,962 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 4.243243243243243) internal successors, (157), 34 states have internal predecessors, (157), 13 states have call successors, (24), 7 states have call predecessors, (24), 8 states have return successors, (23), 10 states have call predecessors, (23), 12 states have call successors, (23) Word has length 134 [2021-11-16 20:43:56,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:43:56,964 INFO L225 Difference]: With dead ends: 877 [2021-11-16 20:43:56,964 INFO L226 Difference]: Without dead ends: 856 [2021-11-16 20:43:56,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 179 SyntacticMatches, 3 SemanticMatches, 88 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2001 ImplicationChecksByTransitivity, 109.4s TimeCoverageRelationStatistics Valid=859, Invalid=6934, Unknown=43, NotChecked=174, Total=8010 [2021-11-16 20:43:56,965 INFO L933 BasicCegarLoop]: 264 mSDtfsCounter, 742 mSDsluCounter, 2514 mSDsCounter, 0 mSdLazyCounter, 4256 mSolverCounterSat, 610 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 752 SdHoareTripleChecker+Valid, 2778 SdHoareTripleChecker+Invalid, 6168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 610 IncrementalHoareTripleChecker+Valid, 4256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1302 IncrementalHoareTripleChecker+Unchecked, 16.9s IncrementalHoareTripleChecker+Time [2021-11-16 20:43:56,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [752 Valid, 2778 Invalid, 6168 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [610 Valid, 4256 Invalid, 0 Unknown, 1302 Unchecked, 16.9s Time] [2021-11-16 20:43:56,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2021-11-16 20:43:57,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 587. [2021-11-16 20:43:57,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 465 states have (on average 1.1161290322580646) internal successors, (519), 474 states have internal predecessors, (519), 82 states have call successors, (82), 32 states have call predecessors, (82), 39 states have return successors, (118), 80 states have call predecessors, (118), 81 states have call successors, (118) [2021-11-16 20:43:57,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 719 transitions. [2021-11-16 20:43:57,008 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 719 transitions. Word has length 134 [2021-11-16 20:43:57,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:43:57,009 INFO L470 AbstractCegarLoop]: Abstraction has 587 states and 719 transitions. [2021-11-16 20:43:57,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 4.243243243243243) internal successors, (157), 34 states have internal predecessors, (157), 13 states have call successors, (24), 7 states have call predecessors, (24), 8 states have return successors, (23), 10 states have call predecessors, (23), 12 states have call successors, (23) [2021-11-16 20:43:57,018 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 719 transitions. [2021-11-16 20:43:57,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-16 20:43:57,020 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:43:57,020 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:43:57,060 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-11-16 20:43:57,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:43:57,235 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:43:57,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:43:57,236 INFO L85 PathProgramCache]: Analyzing trace with hash 382760528, now seen corresponding path program 1 times [2021-11-16 20:43:57,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:43:57,236 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273497845] [2021-11-16 20:43:57,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:43:57,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:43:57,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:43:58,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:43:58,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:43:58,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 20:43:58,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:43:58,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-16 20:43:58,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:43:58,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:43:58,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:43:58,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-16 20:43:58,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:43:59,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-16 20:43:59,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:43:59,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-16 20:43:59,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:43:59,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-16 20:43:59,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:44:00,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:44:00,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:44:00,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-16 20:44:00,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:44:00,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-11-16 20:44:00,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:44:00,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-16 20:44:00,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:44:00,902 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 6 proven. 73 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-16 20:44:00,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:44:00,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273497845] [2021-11-16 20:44:00,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273497845] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:44:00,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202930892] [2021-11-16 20:44:00,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:44:00,903 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:44:00,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:44:00,904 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:44:00,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-16 20:44:01,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:44:01,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 2689 conjuncts, 73 conjunts are in the unsatisfiable core [2021-11-16 20:44:01,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:44:01,285 INFO L388 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 [2021-11-16 20:44:02,861 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-16 20:44:02,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-16 20:44:03,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-16 20:44:07,444 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-11-16 20:44:07,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 37 [2021-11-16 20:44:12,617 INFO L354 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2021-11-16 20:44:12,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 37 [2021-11-16 20:44:15,286 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aws_add_size_checked_aws_add_u64_checked_~a#1| Int) (|aws_add_size_checked_aws_add_u64_checked_~b#1| Int) (|aws_add_size_checked_aws_add_u64_checked_~r#1.offset| Int)) (= |c_#memory_int| (store |c_old(#memory_int)| |c_aws_add_size_checked_#in~r#1.base| (store (select |c_old(#memory_int)| |c_aws_add_size_checked_#in~r#1.base|) |aws_add_size_checked_aws_add_u64_checked_~r#1.offset| (+ |aws_add_size_checked_aws_add_u64_checked_~b#1| |aws_add_size_checked_aws_add_u64_checked_~a#1|))))) is different from true [2021-11-16 20:44:15,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 20:44:15,397 INFO L354 Elim1Store]: treesize reduction 58, result has 22.7 percent of original size [2021-11-16 20:44:15,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2021-11-16 20:44:24,764 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 19 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-16 20:44:24,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:44:38,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202930892] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:44:38,818 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 20:44:38,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 28] total 50 [2021-11-16 20:44:38,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997770570] [2021-11-16 20:44:38,818 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 20:44:38,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-16 20:44:38,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:44:38,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-16 20:44:38,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=2716, Unknown=6, NotChecked=106, Total=3080 [2021-11-16 20:44:38,819 INFO L87 Difference]: Start difference. First operand 587 states and 719 transitions. Second operand has 50 states, 47 states have (on average 4.276595744680851) internal successors, (201), 43 states have internal predecessors, (201), 17 states have call successors, (25), 12 states have call predecessors, (25), 13 states have return successors, (24), 13 states have call predecessors, (24), 17 states have call successors, (24) Killed by 15