./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_array_eq_ignore_case_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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_array_eq_ignore_case_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 8de283a79f01a407383b7daa040c59e7c5c73f52f0f9c705f7021a208716cd24 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 03:12:29,025 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 03:12:29,027 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 03:12:29,069 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 03:12:29,070 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 03:12:29,071 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 03:12:29,072 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 03:12:29,073 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 03:12:29,075 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 03:12:29,076 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 03:12:29,076 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 03:12:29,077 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 03:12:29,078 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 03:12:29,079 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 03:12:29,080 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 03:12:29,081 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 03:12:29,082 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 03:12:29,083 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 03:12:29,084 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 03:12:29,085 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 03:12:29,087 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 03:12:29,092 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 03:12:29,094 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 03:12:29,095 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 03:12:29,097 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 03:12:29,098 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 03:12:29,098 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 03:12:29,099 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 03:12:29,099 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 03:12:29,104 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 03:12:29,104 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 03:12:29,105 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 03:12:29,106 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 03:12:29,107 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 03:12:29,108 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 03:12:29,108 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 03:12:29,109 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 03:12:29,109 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 03:12:29,109 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 03:12:29,110 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 03:12:29,110 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 03:12:29,116 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-16 03:12:29,136 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 03:12:29,136 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 03:12:29,136 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 03:12:29,136 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 03:12:29,137 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 03:12:29,137 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 03:12:29,138 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 03:12:29,138 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 03:12:29,138 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 03:12:29,138 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 03:12:29,138 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 03:12:29,138 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 03:12:29,139 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 03:12:29,139 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 03:12:29,139 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 03:12:29,149 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 03:12:29,149 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 03:12:29,149 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 03:12:29,149 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 03:12:29,150 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 03:12:29,150 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 03:12:29,150 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 03:12:29,150 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 03:12:29,151 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 03:12:29,151 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 03:12:29,151 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 03:12:29,151 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 03:12:29,152 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 03:12:29,152 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 03:12:29,152 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 03:12:29,152 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 03:12:29,153 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8de283a79f01a407383b7daa040c59e7c5c73f52f0f9c705f7021a208716cd24 [2021-12-16 03:12:29,400 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 03:12:29,432 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 03:12:29,435 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 03:12:29,436 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 03:12:29,437 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 03:12:29,438 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_array_eq_ignore_case_harness.i [2021-12-16 03:12:29,494 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/079fba5a6/12dcfae6546149f3977e53e19d3da422/FLAGe8bdc50b3 [2021-12-16 03:12:30,198 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 03:12:30,203 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_array_eq_ignore_case_harness.i [2021-12-16 03:12:30,241 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/079fba5a6/12dcfae6546149f3977e53e19d3da422/FLAGe8bdc50b3 [2021-12-16 03:12:30,311 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/079fba5a6/12dcfae6546149f3977e53e19d3da422 [2021-12-16 03:12:30,313 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 03:12:30,315 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 03:12:30,318 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 03:12:30,318 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 03:12:30,320 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 03:12:30,321 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 03:12:30" (1/1) ... [2021-12-16 03:12:30,322 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27dab9cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:12:30, skipping insertion in model container [2021-12-16 03:12:30,322 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 03:12:30" (1/1) ... [2021-12-16 03:12:30,327 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 03:12:30,422 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 03:12:30,694 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_array_eq_ignore_case_harness.i[4498,4511] [2021-12-16 03:12:30,701 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_array_eq_ignore_case_harness.i[4558,4571] [2021-12-16 03:12:31,368 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:12:31,375 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:12:31,375 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:12:31,376 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:12:31,377 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:12:31,387 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:12:31,388 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:12:31,389 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:12:31,390 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:12:31,652 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-16 03:12:31,654 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-16 03:12:31,656 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-16 03:12:31,657 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-16 03:12:31,658 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-16 03:12:31,658 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-16 03:12:31,659 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-16 03:12:31,660 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-16 03:12:31,660 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-16 03:12:31,661 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-16 03:12:31,777 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-16 03:12:31,847 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:12:31,847 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:12:31,909 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 03:12:31,980 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 03:12:32,001 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_array_eq_ignore_case_harness.i[4498,4511] [2021-12-16 03:12:32,002 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_array_eq_ignore_case_harness.i[4558,4571] [2021-12-16 03:12:32,044 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:12:32,045 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:12:32,046 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:12:32,046 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:12:32,046 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:12:32,059 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:12:32,060 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:12:32,061 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:12:32,062 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:12:32,102 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-16 03:12:32,103 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-16 03:12:32,103 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-16 03:12:32,104 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-16 03:12:32,105 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-16 03:12:32,105 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-16 03:12:32,106 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-16 03:12:32,106 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-16 03:12:32,106 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-16 03:12:32,107 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-16 03:12:32,131 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-16 03:12:32,185 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:12:32,185 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:12:32,216 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 03:12:32,383 INFO L208 MainTranslator]: Completed translation [2021-12-16 03:12:32,384 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:12:32 WrapperNode [2021-12-16 03:12:32,384 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 03:12:32,385 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 03:12:32,385 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 03:12:32,385 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 03:12:32,391 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:12:32" (1/1) ... [2021-12-16 03:12:32,487 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:12:32" (1/1) ... [2021-12-16 03:12:32,581 INFO L137 Inliner]: procedures = 691, calls = 2615, calls flagged for inlining = 58, calls inlined = 4, statements flattened = 774 [2021-12-16 03:12:32,583 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 03:12:32,584 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 03:12:32,584 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 03:12:32,584 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 03:12:32,591 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:12:32" (1/1) ... [2021-12-16 03:12:32,592 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:12:32" (1/1) ... [2021-12-16 03:12:32,604 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:12:32" (1/1) ... [2021-12-16 03:12:32,605 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:12:32" (1/1) ... [2021-12-16 03:12:32,643 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:12:32" (1/1) ... [2021-12-16 03:12:32,656 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:12:32" (1/1) ... [2021-12-16 03:12:32,662 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:12:32" (1/1) ... [2021-12-16 03:12:32,675 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 03:12:32,676 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 03:12:32,676 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 03:12:32,676 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 03:12:32,679 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:12:32" (1/1) ... [2021-12-16 03:12:32,685 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 03:12:32,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:12:32,712 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-16 03:12:32,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-16 03:12:32,747 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_eq_ignore_case [2021-12-16 03:12:32,747 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_eq_ignore_case [2021-12-16 03:12:32,747 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 03:12:32,748 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-12-16 03:12:32,748 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-12-16 03:12:32,749 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-16 03:12:32,749 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-16 03:12:32,749 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-16 03:12:32,749 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-16 03:12:32,750 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 03:12:32,750 INFO L130 BoogieDeclarations]: Found specification of procedure save_byte_from_array [2021-12-16 03:12:32,751 INFO L138 BoogieDeclarations]: Found implementation of procedure save_byte_from_array [2021-12-16 03:12:32,751 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 03:12:32,751 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 03:12:32,751 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-12-16 03:12:32,751 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-12-16 03:12:32,752 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-12-16 03:12:32,752 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-12-16 03:12:32,752 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_malloc [2021-12-16 03:12:32,752 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_malloc [2021-12-16 03:12:32,752 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-16 03:12:32,752 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-16 03:12:32,752 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-16 03:12:32,753 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-16 03:12:32,753 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-16 03:12:32,753 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 03:12:33,034 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 03:12:33,035 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 03:12:33,575 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 03:12:33,584 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 03:12:33,585 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-16 03:12:33,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 03:12:33 BoogieIcfgContainer [2021-12-16 03:12:33,587 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 03:12:33,589 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 03:12:33,589 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 03:12:33,592 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 03:12:33,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 03:12:30" (1/3) ... [2021-12-16 03:12:33,593 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d07c292 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 03:12:33, skipping insertion in model container [2021-12-16 03:12:33,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:12:32" (2/3) ... [2021-12-16 03:12:33,593 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d07c292 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 03:12:33, skipping insertion in model container [2021-12-16 03:12:33,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 03:12:33" (3/3) ... [2021-12-16 03:12:33,595 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_array_eq_ignore_case_harness.i [2021-12-16 03:12:33,599 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 03:12:33,600 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-16 03:12:33,648 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 03:12:33,656 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-16 03:12:33,657 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-16 03:12:33,673 INFO L276 IsEmpty]: Start isEmpty. Operand has 77 states, 47 states have (on average 1.297872340425532) internal successors, (61), 51 states have internal predecessors, (61), 20 states have call successors, (20), 8 states have call predecessors, (20), 8 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-12-16 03:12:33,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-16 03:12:33,679 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:12:33,679 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-12-16 03:12:33,680 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:12:33,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:12:33,685 INFO L85 PathProgramCache]: Analyzing trace with hash 106347311, now seen corresponding path program 1 times [2021-12-16 03:12:33,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:12:33,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929525709] [2021-12-16 03:12:33,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:12:33,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:12:33,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:34,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:12:34,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:34,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 03:12:34,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:34,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:12:34,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:34,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-16 03:12:34,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:34,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-16 03:12:34,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:34,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-16 03:12:34,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:34,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-16 03:12:34,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:34,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-16 03:12:34,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:34,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-16 03:12:34,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:34,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:12:34,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:34,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 03:12:34,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:34,349 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-12-16 03:12:34,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:12:34,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929525709] [2021-12-16 03:12:34,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929525709] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:12:34,351 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:12:34,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 03:12:34,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194385454] [2021-12-16 03:12:34,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:12:34,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 03:12:34,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:12:34,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 03:12:34,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 03:12:34,385 INFO L87 Difference]: Start difference. First operand has 77 states, 47 states have (on average 1.297872340425532) internal successors, (61), 51 states have internal predecessors, (61), 20 states have call successors, (20), 8 states have call predecessors, (20), 8 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 2 states have internal predecessors, (25), 2 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-16 03:12:34,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:12:34,646 INFO L93 Difference]: Finished difference Result 156 states and 223 transitions. [2021-12-16 03:12:34,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 03:12:34,648 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 2 states have internal predecessors, (25), 2 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 65 [2021-12-16 03:12:34,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:12:34,656 INFO L225 Difference]: With dead ends: 156 [2021-12-16 03:12:34,656 INFO L226 Difference]: Without dead ends: 77 [2021-12-16 03:12:34,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 03:12:34,662 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 76 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 03:12:34,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 120 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 03:12:34,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-12-16 03:12:34,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 72. [2021-12-16 03:12:34,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 43 states have (on average 1.2325581395348837) internal successors, (53), 46 states have internal predecessors, (53), 20 states have call successors, (20), 8 states have call predecessors, (20), 8 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-12-16 03:12:34,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 92 transitions. [2021-12-16 03:12:34,739 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 92 transitions. Word has length 65 [2021-12-16 03:12:34,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:12:34,739 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 92 transitions. [2021-12-16 03:12:34,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 2 states have internal predecessors, (25), 2 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-16 03:12:34,740 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 92 transitions. [2021-12-16 03:12:34,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-16 03:12:34,748 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:12:34,749 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-12-16 03:12:34,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 03:12:34,749 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:12:34,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:12:34,750 INFO L85 PathProgramCache]: Analyzing trace with hash -566993231, now seen corresponding path program 1 times [2021-12-16 03:12:34,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:12:34,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436826506] [2021-12-16 03:12:34,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:12:34,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:12:34,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:34,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:12:34,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:35,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 03:12:35,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:35,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:12:35,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:35,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-16 03:12:35,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:35,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-16 03:12:35,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:35,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-16 03:12:35,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:35,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-16 03:12:35,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:35,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-16 03:12:35,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:35,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-16 03:12:35,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:35,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:12:35,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:35,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 03:12:35,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:35,132 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-12-16 03:12:35,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:12:35,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436826506] [2021-12-16 03:12:35,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436826506] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:12:35,133 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:12:35,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 03:12:35,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957272517] [2021-12-16 03:12:35,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:12:35,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 03:12:35,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:12:35,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 03:12:35,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-16 03:12:35,136 INFO L87 Difference]: Start difference. First operand 72 states and 92 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 3 states have internal predecessors, (25), 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) [2021-12-16 03:12:35,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:12:35,450 INFO L93 Difference]: Finished difference Result 97 states and 123 transitions. [2021-12-16 03:12:35,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 03:12:35,450 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 3 states have internal predecessors, (25), 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 65 [2021-12-16 03:12:35,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:12:35,455 INFO L225 Difference]: With dead ends: 97 [2021-12-16 03:12:35,455 INFO L226 Difference]: Without dead ends: 80 [2021-12-16 03:12:35,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-16 03:12:35,460 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 78 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 03:12:35,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 190 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 03:12:35,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-12-16 03:12:35,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 75. [2021-12-16 03:12:35,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 45 states have (on average 1.2222222222222223) internal successors, (55), 48 states have internal predecessors, (55), 20 states have call successors, (20), 8 states have call predecessors, (20), 9 states have return successors, (20), 20 states have call predecessors, (20), 19 states have call successors, (20) [2021-12-16 03:12:35,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 95 transitions. [2021-12-16 03:12:35,474 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 95 transitions. Word has length 65 [2021-12-16 03:12:35,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:12:35,475 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 95 transitions. [2021-12-16 03:12:35,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 3 states have internal predecessors, (25), 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) [2021-12-16 03:12:35,475 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 95 transitions. [2021-12-16 03:12:35,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-16 03:12:35,476 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:12:35,477 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-12-16 03:12:35,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 03:12:35,477 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:12:35,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:12:35,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1579169156, now seen corresponding path program 1 times [2021-12-16 03:12:35,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:12:35,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728138075] [2021-12-16 03:12:35,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:12:35,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:12:35,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:36,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:12:36,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:36,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 03:12:36,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:36,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:12:36,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:36,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-16 03:12:36,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:36,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-16 03:12:36,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:36,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-16 03:12:36,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:36,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-16 03:12:36,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:36,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-16 03:12:36,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:36,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-16 03:12:36,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:36,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:12:36,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:36,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 03:12:36,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:36,290 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-16 03:12:36,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:12:36,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728138075] [2021-12-16 03:12:36,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728138075] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:12:36,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958606656] [2021-12-16 03:12:36,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:12:36,292 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:12:36,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:12:36,295 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 03:12:36,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 03:12:36,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:36,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 2460 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-16 03:12:36,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:12:36,988 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-12-16 03:12:36,988 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 03:12:36,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958606656] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:12:36,989 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 03:12:36,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14] total 18 [2021-12-16 03:12:36,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636832326] [2021-12-16 03:12:36,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:12:36,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 03:12:36,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:12:36,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 03:12:36,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2021-12-16 03:12:36,991 INFO L87 Difference]: Start difference. First operand 75 states and 95 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-16 03:12:37,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:12:37,062 INFO L93 Difference]: Finished difference Result 109 states and 141 transitions. [2021-12-16 03:12:37,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 03:12:37,063 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) Word has length 67 [2021-12-16 03:12:37,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:12:37,065 INFO L225 Difference]: With dead ends: 109 [2021-12-16 03:12:37,065 INFO L226 Difference]: Without dead ends: 93 [2021-12-16 03:12:37,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-12-16 03:12:37,066 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 9 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 03:12:37,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 543 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 03:12:37,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-16 03:12:37,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 88. [2021-12-16 03:12:37,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 51 states have (on average 1.196078431372549) internal successors, (61), 55 states have internal predecessors, (61), 26 states have call successors, (26), 9 states have call predecessors, (26), 10 states have return successors, (27), 25 states have call predecessors, (27), 25 states have call successors, (27) [2021-12-16 03:12:37,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 114 transitions. [2021-12-16 03:12:37,077 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 114 transitions. Word has length 67 [2021-12-16 03:12:37,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:12:37,078 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 114 transitions. [2021-12-16 03:12:37,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-16 03:12:37,078 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 114 transitions. [2021-12-16 03:12:37,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-16 03:12:37,080 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:12:37,080 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:12:37,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-16 03:12:37,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:12:37,306 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:12:37,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:12:37,306 INFO L85 PathProgramCache]: Analyzing trace with hash 537595811, now seen corresponding path program 1 times [2021-12-16 03:12:37,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:12:37,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997603149] [2021-12-16 03:12:37,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:12:37,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:12:37,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:37,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:12:37,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:37,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 03:12:37,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:37,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:12:37,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:37,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-16 03:12:37,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:37,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-16 03:12:37,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:37,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-16 03:12:37,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:37,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-16 03:12:37,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:37,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-16 03:12:37,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:37,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-16 03:12:37,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:37,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:12:37,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:37,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 03:12:37,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:37,611 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-12-16 03:12:37,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:12:37,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997603149] [2021-12-16 03:12:37,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997603149] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:12:37,612 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:12:37,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-16 03:12:37,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311006149] [2021-12-16 03:12:37,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:12:37,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-16 03:12:37,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:12:37,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-16 03:12:37,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-12-16 03:12:37,614 INFO L87 Difference]: Start difference. First operand 88 states and 114 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (13), 5 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-16 03:12:38,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:12:38,086 INFO L93 Difference]: Finished difference Result 140 states and 197 transitions. [2021-12-16 03:12:38,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-16 03:12:38,087 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (13), 5 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) Word has length 69 [2021-12-16 03:12:38,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:12:38,089 INFO L225 Difference]: With dead ends: 140 [2021-12-16 03:12:38,089 INFO L226 Difference]: Without dead ends: 126 [2021-12-16 03:12:38,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-12-16 03:12:38,090 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 90 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 03:12:38,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 409 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-16 03:12:38,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-12-16 03:12:38,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 122. [2021-12-16 03:12:38,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 67 states have (on average 1.1940298507462686) internal successors, (80), 73 states have internal predecessors, (80), 42 states have call successors, (42), 10 states have call predecessors, (42), 12 states have return successors, (48), 41 states have call predecessors, (48), 41 states have call successors, (48) [2021-12-16 03:12:38,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 170 transitions. [2021-12-16 03:12:38,106 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 170 transitions. Word has length 69 [2021-12-16 03:12:38,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:12:38,107 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 170 transitions. [2021-12-16 03:12:38,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (13), 5 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-16 03:12:38,107 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 170 transitions. [2021-12-16 03:12:38,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-16 03:12:38,109 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:12:38,109 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:12:38,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-16 03:12:38,109 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:12:38,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:12:38,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1643615623, now seen corresponding path program 1 times [2021-12-16 03:12:38,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:12:38,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946908041] [2021-12-16 03:12:38,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:12:38,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:12:38,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:38,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:12:38,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:38,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 03:12:38,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:38,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:12:38,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:38,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-16 03:12:38,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:38,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-16 03:12:38,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:38,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-16 03:12:38,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:38,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-16 03:12:38,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:38,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-16 03:12:38,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:38,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-16 03:12:38,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:38,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:12:38,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:38,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 03:12:38,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:38,456 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-12-16 03:12:38,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:12:38,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946908041] [2021-12-16 03:12:38,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946908041] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:12:38,457 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:12:38,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-16 03:12:38,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168179932] [2021-12-16 03:12:38,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:12:38,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-16 03:12:38,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:12:38,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-16 03:12:38,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-12-16 03:12:38,459 INFO L87 Difference]: Start difference. First operand 122 states and 170 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 7 states have internal predecessors, (29), 4 states have call successors, (13), 5 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-16 03:12:39,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:12:39,007 INFO L93 Difference]: Finished difference Result 145 states and 201 transitions. [2021-12-16 03:12:39,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-16 03:12:39,008 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 7 states have internal predecessors, (29), 4 states have call successors, (13), 5 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) Word has length 70 [2021-12-16 03:12:39,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:12:39,013 INFO L225 Difference]: With dead ends: 145 [2021-12-16 03:12:39,013 INFO L226 Difference]: Without dead ends: 117 [2021-12-16 03:12:39,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-12-16 03:12:39,015 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 104 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 03:12:39,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 502 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-16 03:12:39,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-12-16 03:12:39,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 113. [2021-12-16 03:12:39,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 64 states have (on average 1.1875) internal successors, (76), 69 states have internal predecessors, (76), 36 states have call successors, (36), 10 states have call predecessors, (36), 12 states have return successors, (41), 36 states have call predecessors, (41), 35 states have call successors, (41) [2021-12-16 03:12:39,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 153 transitions. [2021-12-16 03:12:39,041 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 153 transitions. Word has length 70 [2021-12-16 03:12:39,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:12:39,042 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 153 transitions. [2021-12-16 03:12:39,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 7 states have internal predecessors, (29), 4 states have call successors, (13), 5 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-16 03:12:39,042 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 153 transitions. [2021-12-16 03:12:39,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-16 03:12:39,046 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:12:39,046 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2021-12-16 03:12:39,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-16 03:12:39,046 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:12:39,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:12:39,047 INFO L85 PathProgramCache]: Analyzing trace with hash 510934331, now seen corresponding path program 1 times [2021-12-16 03:12:39,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:12:39,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100438304] [2021-12-16 03:12:39,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:12:39,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:12:39,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:39,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:12:39,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:39,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 03:12:39,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:39,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:12:39,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:39,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-16 03:12:39,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:39,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-16 03:12:39,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:39,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-16 03:12:39,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:39,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:12:39,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:39,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-16 03:12:39,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:39,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-16 03:12:39,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:39,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 03:12:39,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:39,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-16 03:12:39,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:39,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-16 03:12:39,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:39,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:12:39,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:39,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 03:12:39,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:39,645 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-16 03:12:39,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:12:39,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100438304] [2021-12-16 03:12:39,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100438304] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:12:39,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209128866] [2021-12-16 03:12:39,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:12:39,646 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:12:39,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:12:39,648 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 03:12:39,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 03:12:40,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:40,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 2498 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-16 03:12:40,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:12:40,334 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-12-16 03:12:40,335 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 03:12:40,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209128866] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:12:40,335 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 03:12:40,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13] total 19 [2021-12-16 03:12:40,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294176229] [2021-12-16 03:12:40,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:12:40,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-16 03:12:40,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:12:40,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-16 03:12:40,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-12-16 03:12:40,337 INFO L87 Difference]: Start difference. First operand 113 states and 153 transitions. Second operand has 9 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-16 03:12:40,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:12:40,483 INFO L93 Difference]: Finished difference Result 156 states and 207 transitions. [2021-12-16 03:12:40,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-16 03:12:40,484 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) Word has length 83 [2021-12-16 03:12:40,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:12:40,485 INFO L225 Difference]: With dead ends: 156 [2021-12-16 03:12:40,485 INFO L226 Difference]: Without dead ends: 131 [2021-12-16 03:12:40,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-12-16 03:12:40,487 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 31 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 643 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 03:12:40,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 643 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 03:12:40,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-12-16 03:12:40,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 123. [2021-12-16 03:12:40,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 70 states have (on average 1.1428571428571428) internal successors, (80), 75 states have internal predecessors, (80), 38 states have call successors, (38), 12 states have call predecessors, (38), 14 states have return successors, (45), 38 states have call predecessors, (45), 37 states have call successors, (45) [2021-12-16 03:12:40,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 163 transitions. [2021-12-16 03:12:40,510 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 163 transitions. Word has length 83 [2021-12-16 03:12:40,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:12:40,510 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 163 transitions. [2021-12-16 03:12:40,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-16 03:12:40,510 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 163 transitions. [2021-12-16 03:12:40,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-16 03:12:40,512 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:12:40,512 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:12:40,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-16 03:12:40,749 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,SelfDestructingSolverStorable5 [2021-12-16 03:12:40,750 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:12:40,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:12:40,750 INFO L85 PathProgramCache]: Analyzing trace with hash -2026638528, now seen corresponding path program 1 times [2021-12-16 03:12:40,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:12:40,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737127284] [2021-12-16 03:12:40,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:12:40,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:12:40,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:41,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:12:41,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:41,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 03:12:41,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:41,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:12:41,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:41,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 03:12:41,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:41,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:12:41,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:41,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-16 03:12:41,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:41,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-16 03:12:41,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:41,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-16 03:12:41,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:41,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-16 03:12:41,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:41,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 03:12:41,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:41,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-16 03:12:41,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:41,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:12:41,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:41,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 03:12:41,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:41,311 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-16 03:12:41,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:12:41,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737127284] [2021-12-16 03:12:41,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737127284] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:12:41,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743215260] [2021-12-16 03:12:41,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:12:41,312 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:12:41,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:12:41,313 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 03:12:41,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 03:12:41,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:41,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 2532 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-16 03:12:41,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:12:42,251 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-16 03:12:42,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:12:42,988 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-16 03:12:42,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743215260] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-16 03:12:42,988 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-16 03:12:42,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [17, 14] total 39 [2021-12-16 03:12:42,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032131218] [2021-12-16 03:12:42,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:12:42,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-16 03:12:42,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:12:42,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-16 03:12:42,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1373, Unknown=0, NotChecked=0, Total=1482 [2021-12-16 03:12:42,990 INFO L87 Difference]: Start difference. First operand 123 states and 163 transitions. Second operand has 14 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 7 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2021-12-16 03:12:43,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:12:43,782 INFO L93 Difference]: Finished difference Result 158 states and 212 transitions. [2021-12-16 03:12:43,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-16 03:12:43,783 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 7 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) Word has length 82 [2021-12-16 03:12:43,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:12:43,784 INFO L225 Difference]: With dead ends: 158 [2021-12-16 03:12:43,784 INFO L226 Difference]: Without dead ends: 143 [2021-12-16 03:12:43,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=170, Invalid=2182, Unknown=0, NotChecked=0, Total=2352 [2021-12-16 03:12:43,787 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 156 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 653 SdHoareTripleChecker+Invalid, 778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-16 03:12:43,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 653 Invalid, 778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 719 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-16 03:12:43,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-12-16 03:12:43,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 132. [2021-12-16 03:12:43,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 74 states have (on average 1.135135135135135) internal successors, (84), 79 states have internal predecessors, (84), 42 states have call successors, (42), 12 states have call predecessors, (42), 15 states have return successors, (56), 44 states have call predecessors, (56), 41 states have call successors, (56) [2021-12-16 03:12:43,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 182 transitions. [2021-12-16 03:12:43,801 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 182 transitions. Word has length 82 [2021-12-16 03:12:43,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:12:43,801 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 182 transitions. [2021-12-16 03:12:43,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 7 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2021-12-16 03:12:43,802 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 182 transitions. [2021-12-16 03:12:43,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-16 03:12:43,803 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:12:43,803 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:12:43,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-16 03:12:44,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:12:44,028 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:12:44,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:12:44,029 INFO L85 PathProgramCache]: Analyzing trace with hash -410378865, now seen corresponding path program 1 times [2021-12-16 03:12:44,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:12:44,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785481347] [2021-12-16 03:12:44,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:12:44,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:12:44,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:44,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:12:44,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:44,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 03:12:44,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:44,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:12:44,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:44,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 03:12:44,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:44,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:12:44,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:44,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-16 03:12:44,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:44,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-16 03:12:44,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:44,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-16 03:12:44,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:44,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 03:12:44,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:44,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-16 03:12:44,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:44,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-16 03:12:44,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:44,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-16 03:12:44,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:44,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:12:44,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:44,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 03:12:44,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:44,653 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-12-16 03:12:44,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:12:44,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785481347] [2021-12-16 03:12:44,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785481347] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:12:44,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768715356] [2021-12-16 03:12:44,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:12:44,654 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:12:44,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:12:44,655 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 03:12:44,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 03:12:44,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:44,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 2577 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-16 03:12:44,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:12:45,485 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-16 03:12:45,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:12:46,157 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-12-16 03:12:46,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768715356] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:12:46,158 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:12:46,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 13, 13] total 41 [2021-12-16 03:12:46,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536144943] [2021-12-16 03:12:46,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:12:46,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-16 03:12:46,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:12:46,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-16 03:12:46,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1527, Unknown=0, NotChecked=0, Total=1640 [2021-12-16 03:12:46,160 INFO L87 Difference]: Start difference. First operand 132 states and 182 transitions. Second operand has 41 states, 37 states have (on average 2.27027027027027) internal successors, (84), 32 states have internal predecessors, (84), 15 states have call successors, (34), 6 states have call predecessors, (34), 11 states have return successors, (31), 16 states have call predecessors, (31), 13 states have call successors, (31) [2021-12-16 03:12:48,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:12:48,521 INFO L93 Difference]: Finished difference Result 203 states and 288 transitions. [2021-12-16 03:12:48,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-16 03:12:48,522 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 37 states have (on average 2.27027027027027) internal successors, (84), 32 states have internal predecessors, (84), 15 states have call successors, (34), 6 states have call predecessors, (34), 11 states have return successors, (31), 16 states have call predecessors, (31), 13 states have call successors, (31) Word has length 89 [2021-12-16 03:12:48,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:12:48,524 INFO L225 Difference]: With dead ends: 203 [2021-12-16 03:12:48,524 INFO L226 Difference]: Without dead ends: 188 [2021-12-16 03:12:48,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=371, Invalid=3789, Unknown=0, NotChecked=0, Total=4160 [2021-12-16 03:12:48,526 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 288 mSDsluCounter, 840 mSDsCounter, 0 mSdLazyCounter, 3111 mSolverCounterSat, 396 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 911 SdHoareTripleChecker+Invalid, 3507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 396 IncrementalHoareTripleChecker+Valid, 3111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-16 03:12:48,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 911 Invalid, 3507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [396 Valid, 3111 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-16 03:12:48,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-12-16 03:12:48,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 145. [2021-12-16 03:12:48,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 80 states have (on average 1.1375) internal successors, (91), 85 states have internal predecessors, (91), 48 states have call successors, (48), 13 states have call predecessors, (48), 16 states have return successors, (66), 50 states have call predecessors, (66), 47 states have call successors, (66) [2021-12-16 03:12:48,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 205 transitions. [2021-12-16 03:12:48,543 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 205 transitions. Word has length 89 [2021-12-16 03:12:48,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:12:48,544 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 205 transitions. [2021-12-16 03:12:48,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 37 states have (on average 2.27027027027027) internal successors, (84), 32 states have internal predecessors, (84), 15 states have call successors, (34), 6 states have call predecessors, (34), 11 states have return successors, (31), 16 states have call predecessors, (31), 13 states have call successors, (31) [2021-12-16 03:12:48,545 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 205 transitions. [2021-12-16 03:12:48,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-16 03:12:48,546 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:12:48,546 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2021-12-16 03:12:48,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-16 03:12:48,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:12:48,760 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:12:48,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:12:48,761 INFO L85 PathProgramCache]: Analyzing trace with hash -727359888, now seen corresponding path program 1 times [2021-12-16 03:12:48,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:12:48,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884516062] [2021-12-16 03:12:48,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:12:48,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:12:48,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:48,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:12:48,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:48,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 03:12:48,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:48,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:12:48,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:48,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-16 03:12:48,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:48,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-16 03:12:48,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:48,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-16 03:12:48,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:48,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:12:48,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:48,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-16 03:12:49,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:49,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-16 03:12:49,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:49,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 03:12:49,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:49,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-16 03:12:49,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:49,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-16 03:12:49,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:49,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:12:49,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:49,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 03:12:49,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:49,052 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-12-16 03:12:49,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:12:49,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884516062] [2021-12-16 03:12:49,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884516062] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:12:49,052 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:12:49,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-16 03:12:49,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106073298] [2021-12-16 03:12:49,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:12:49,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-16 03:12:49,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:12:49,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-16 03:12:49,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-12-16 03:12:49,055 INFO L87 Difference]: Start difference. First operand 145 states and 205 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 6 states have internal predecessors, (33), 3 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-16 03:12:49,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:12:49,451 INFO L93 Difference]: Finished difference Result 196 states and 287 transitions. [2021-12-16 03:12:49,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-16 03:12:49,452 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 6 states have internal predecessors, (33), 3 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) Word has length 86 [2021-12-16 03:12:49,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:12:49,454 INFO L225 Difference]: With dead ends: 196 [2021-12-16 03:12:49,454 INFO L226 Difference]: Without dead ends: 158 [2021-12-16 03:12:49,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-12-16 03:12:49,455 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 81 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 03:12:49,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 502 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 03:12:49,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-12-16 03:12:49,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2021-12-16 03:12:49,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 86 states have (on average 1.127906976744186) internal successors, (97), 91 states have internal predecessors, (97), 55 states have call successors, (55), 13 states have call predecessors, (55), 16 states have return successors, (74), 58 states have call predecessors, (74), 53 states have call successors, (74) [2021-12-16 03:12:49,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 226 transitions. [2021-12-16 03:12:49,471 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 226 transitions. Word has length 86 [2021-12-16 03:12:49,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:12:49,471 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 226 transitions. [2021-12-16 03:12:49,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 6 states have internal predecessors, (33), 3 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-16 03:12:49,472 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 226 transitions. [2021-12-16 03:12:49,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-16 03:12:49,479 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:12:49,480 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2021-12-16 03:12:49,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-16 03:12:49,480 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:12:49,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:12:49,481 INFO L85 PathProgramCache]: Analyzing trace with hash -538237558, now seen corresponding path program 1 times [2021-12-16 03:12:49,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:12:49,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55666634] [2021-12-16 03:12:49,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:12:49,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:12:49,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:49,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:12:49,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:49,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 03:12:49,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:49,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:12:49,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:49,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 03:12:49,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:49,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:12:49,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:49,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-16 03:12:49,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:49,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-16 03:12:49,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:49,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-16 03:12:49,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:49,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-16 03:12:49,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:49,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 03:12:49,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:49,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-16 03:12:49,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:49,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:12:49,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:49,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 03:12:49,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:49,746 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-12-16 03:12:49,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:12:49,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55666634] [2021-12-16 03:12:49,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55666634] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:12:49,746 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:12:49,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 03:12:49,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785516631] [2021-12-16 03:12:49,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:12:49,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 03:12:49,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:12:49,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 03:12:49,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-16 03:12:49,749 INFO L87 Difference]: Start difference. First operand 158 states and 226 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 4 states have internal predecessors, (35), 3 states have call successors, (15), 4 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-16 03:12:50,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:12:50,025 INFO L93 Difference]: Finished difference Result 179 states and 249 transitions. [2021-12-16 03:12:50,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 03:12:50,027 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 4 states have internal predecessors, (35), 3 states have call successors, (15), 4 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 83 [2021-12-16 03:12:50,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:12:50,028 INFO L225 Difference]: With dead ends: 179 [2021-12-16 03:12:50,028 INFO L226 Difference]: Without dead ends: 156 [2021-12-16 03:12:50,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-16 03:12:50,029 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 80 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 03:12:50,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 199 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 03:12:50,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-12-16 03:12:50,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 153. [2021-12-16 03:12:50,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 86 states have (on average 1.127906976744186) internal successors, (97), 90 states have internal predecessors, (97), 50 states have call successors, (50), 13 states have call predecessors, (50), 16 states have return successors, (65), 55 states have call predecessors, (65), 48 states have call successors, (65) [2021-12-16 03:12:50,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 212 transitions. [2021-12-16 03:12:50,042 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 212 transitions. Word has length 83 [2021-12-16 03:12:50,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:12:50,044 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 212 transitions. [2021-12-16 03:12:50,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 4 states have internal predecessors, (35), 3 states have call successors, (15), 4 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-16 03:12:50,045 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 212 transitions. [2021-12-16 03:12:50,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-16 03:12:50,048 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:12:50,048 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 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] [2021-12-16 03:12:50,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-16 03:12:50,049 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:12:50,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:12:50,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1085947873, now seen corresponding path program 1 times [2021-12-16 03:12:50,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:12:50,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760120547] [2021-12-16 03:12:50,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:12:50,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:12:50,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:50,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:12:50,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:50,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 03:12:50,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:50,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:12:50,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:50,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-16 03:12:50,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:50,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-16 03:12:50,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:50,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-16 03:12:50,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:50,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:12:50,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:50,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 03:12:50,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:50,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:12:50,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:50,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 03:12:50,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:50,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-16 03:12:50,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:50,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-16 03:12:50,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:50,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-16 03:12:50,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:50,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-16 03:12:50,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:50,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:12:50,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:50,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 03:12:50,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:50,564 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-12-16 03:12:50,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:12:50,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760120547] [2021-12-16 03:12:50,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760120547] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:12:50,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11309197] [2021-12-16 03:12:50,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:12:50,565 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:12:50,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:12:50,566 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 03:12:50,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-16 03:12:50,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:12:50,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 2550 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-16 03:12:50,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:12:51,437 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 3 proven. 52 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-16 03:12:51,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:12:52,132 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-12-16 03:12:52,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11309197] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-16 03:12:52,133 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-16 03:12:52,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [20, 13] total 41 [2021-12-16 03:12:52,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910134069] [2021-12-16 03:12:52,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:12:52,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-16 03:12:52,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:12:52,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-16 03:12:52,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1514, Unknown=0, NotChecked=0, Total=1640 [2021-12-16 03:12:52,137 INFO L87 Difference]: Start difference. First operand 153 states and 212 transitions. Second operand has 14 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 7 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) [2021-12-16 03:12:52,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:12:52,738 INFO L93 Difference]: Finished difference Result 193 states and 275 transitions. [2021-12-16 03:12:52,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-16 03:12:52,739 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 7 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) Word has length 97 [2021-12-16 03:12:52,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:12:52,740 INFO L225 Difference]: With dead ends: 193 [2021-12-16 03:12:52,740 INFO L226 Difference]: Without dead ends: 164 [2021-12-16 03:12:52,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=195, Invalid=2355, Unknown=0, NotChecked=0, Total=2550 [2021-12-16 03:12:52,742 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 122 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 03:12:52,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 614 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-16 03:12:52,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-12-16 03:12:52,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 153. [2021-12-16 03:12:52,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 86 states have (on average 1.127906976744186) internal successors, (97), 90 states have internal predecessors, (97), 50 states have call successors, (50), 13 states have call predecessors, (50), 16 states have return successors, (63), 55 states have call predecessors, (63), 48 states have call successors, (63) [2021-12-16 03:12:52,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 210 transitions. [2021-12-16 03:12:52,752 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 210 transitions. Word has length 97 [2021-12-16 03:12:52,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:12:52,752 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 210 transitions. [2021-12-16 03:12:52,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 7 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) [2021-12-16 03:12:52,752 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 210 transitions. [2021-12-16 03:12:52,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-16 03:12:52,753 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:12:52,754 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 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] [2021-12-16 03:12:52,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-16 03:12:52,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-16 03:12:52,955 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:12:52,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:12:52,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1647697566, now seen corresponding path program 1 times [2021-12-16 03:12:52,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:12:52,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909184644] [2021-12-16 03:12:52,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:12:52,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:12:54,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:13:07,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:13:07,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:13:08,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 03:13:08,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:13:08,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:13:08,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:13:08,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-16 03:13:08,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:13:08,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-16 03:13:08,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:13:08,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-16 03:13:08,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:13:08,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:13:08,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:13:08,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 03:13:08,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:13:08,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:13:08,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:13:08,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 03:13:08,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:13:08,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-16 03:13:08,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:13:08,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 03:13:08,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:13:08,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-16 03:13:08,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:13:08,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-16 03:13:08,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:13:08,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-16 03:13:08,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:13:08,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:13:08,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:13:08,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 03:13:08,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:13:08,999 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2021-12-16 03:13:09,000 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:13:09,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909184644] [2021-12-16 03:13:09,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909184644] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:13:09,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113361986] [2021-12-16 03:13:09,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:13:09,000 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:13:09,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:13:09,002 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 03:13:09,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-16 03:13:09,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:13:09,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 2595 conjuncts, 110 conjunts are in the unsatisfiable core [2021-12-16 03:13:09,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:13:09,720 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 [2021-12-16 03:13:09,992 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-16 03:13:09,992 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 [2021-12-16 03:13:10,138 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-16 03:13:10,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-16 03:13:10,273 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 11 treesize of output 7 [2021-12-16 03:13:10,520 INFO L354 Elim1Store]: treesize reduction 88, result has 32.3 percent of original size [2021-12-16 03:13:10,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 77 treesize of output 92 [2021-12-16 03:13:15,969 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-16 03:13:15,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 51 [2021-12-16 03:13:16,055 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 34 proven. 46 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-12-16 03:13:16,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:13:22,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 03:13:22,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 03:13:23,112 INFO L354 Elim1Store]: treesize reduction 750, result has 0.1 percent of original size [2021-12-16 03:13:23,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 176 treesize of output 1