./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_byte_buf_append_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/aws-c-common/aws_byte_buf_append_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 aad159acc9cbece9fe1ce64619aff83e5e3477bbd84af6f399f8d36d8b5384a2 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 15:29:17,104 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 15:29:17,112 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 15:29:17,169 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 15:29:17,170 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 15:29:17,173 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 15:29:17,174 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 15:29:17,179 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 15:29:17,181 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 15:29:17,185 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 15:29:17,186 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 15:29:17,187 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 15:29:17,187 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 15:29:17,190 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 15:29:17,191 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 15:29:17,194 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 15:29:17,196 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 15:29:17,196 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 15:29:17,198 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 15:29:17,205 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 15:29:17,207 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 15:29:17,208 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 15:29:17,209 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 15:29:17,210 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 15:29:17,215 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 15:29:17,215 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 15:29:17,216 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 15:29:17,217 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 15:29:17,218 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 15:29:17,218 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 15:29:17,219 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 15:29:17,220 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 15:29:17,221 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 15:29:17,222 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 15:29:17,223 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 15:29:17,223 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 15:29:17,224 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 15:29:17,224 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 15:29:17,224 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 15:29:17,225 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 15:29:17,225 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 15:29:17,226 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-21 15:29:17,258 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 15:29:17,258 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 15:29:17,259 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 15:29:17,259 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 15:29:17,260 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 15:29:17,260 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 15:29:17,260 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 15:29:17,261 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 15:29:17,261 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 15:29:17,261 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 15:29:17,262 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 15:29:17,262 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 15:29:17,262 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 15:29:17,262 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 15:29:17,262 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 15:29:17,263 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 15:29:17,263 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 15:29:17,263 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 15:29:17,263 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 15:29:17,263 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 15:29:17,263 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 15:29:17,264 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 15:29:17,264 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 15:29:17,264 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 15:29:17,264 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 15:29:17,264 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 15:29:17,265 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 15:29:17,266 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 15:29:17,266 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 15:29:17,266 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 15:29:17,266 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 15:29:17,266 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aad159acc9cbece9fe1ce64619aff83e5e3477bbd84af6f399f8d36d8b5384a2 [2021-12-21 15:29:17,481 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 15:29:17,511 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 15:29:17,514 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 15:29:17,515 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 15:29:17,515 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 15:29:17,516 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_byte_buf_append_harness.i [2021-12-21 15:29:17,573 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02a81c25c/5f27aaf0f19d4e33a690e20e6a307e5b/FLAGb2d8af154 [2021-12-21 15:29:18,298 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 15:29:18,299 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_append_harness.i [2021-12-21 15:29:18,345 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02a81c25c/5f27aaf0f19d4e33a690e20e6a307e5b/FLAGb2d8af154 [2021-12-21 15:29:18,591 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02a81c25c/5f27aaf0f19d4e33a690e20e6a307e5b [2021-12-21 15:29:18,594 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 15:29:18,595 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 15:29:18,596 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 15:29:18,596 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 15:29:18,599 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 15:29:18,600 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 03:29:18" (1/1) ... [2021-12-21 15:29:18,601 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ca06670 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:29:18, skipping insertion in model container [2021-12-21 15:29:18,601 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 03:29:18" (1/1) ... [2021-12-21 15:29:18,606 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 15:29:18,722 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 15:29:18,936 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_append_harness.i[4493,4506] [2021-12-21 15:29:18,943 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_append_harness.i[4553,4566] [2021-12-21 15:29:19,536 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:29:19,539 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:29:19,539 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:29:19,540 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:29:19,543 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:29:19,562 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:29:19,563 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:29:19,565 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:29:19,565 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:29:19,786 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-21 15:29:19,788 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-21 15:29:19,789 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-21 15:29:19,790 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-21 15:29:19,793 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-21 15:29:19,796 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-21 15:29:19,797 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-21 15:29:19,798 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-21 15:29:19,800 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-21 15:29:19,802 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-21 15:29:19,934 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-21 15:29:20,029 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:29:20,030 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:29:20,079 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 15:29:20,132 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 15:29:20,144 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_append_harness.i[4493,4506] [2021-12-21 15:29:20,145 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_append_harness.i[4553,4566] [2021-12-21 15:29:20,173 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:29:20,173 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:29:20,174 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:29:20,174 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:29:20,175 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:29:20,179 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:29:20,180 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:29:20,180 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:29:20,181 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:29:20,204 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-21 15:29:20,205 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-21 15:29:20,205 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-21 15:29:20,206 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-21 15:29:20,206 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-21 15:29:20,207 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-21 15:29:20,207 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-21 15:29:20,208 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-21 15:29:20,208 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-21 15:29:20,208 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-21 15:29:20,224 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-21 15:29:20,296 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:29:20,299 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:29:20,336 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 15:29:20,580 INFO L208 MainTranslator]: Completed translation [2021-12-21 15:29:20,580 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:29:20 WrapperNode [2021-12-21 15:29:20,580 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 15:29:20,581 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 15:29:20,581 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 15:29:20,582 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 15:29:20,587 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:29:20" (1/1) ... [2021-12-21 15:29:20,709 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:29:20" (1/1) ... [2021-12-21 15:29:20,786 INFO L137 Inliner]: procedures = 691, calls = 2643, calls flagged for inlining = 60, calls inlined = 8, statements flattened = 859 [2021-12-21 15:29:20,787 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 15:29:20,788 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 15:29:20,788 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 15:29:20,788 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 15:29:20,795 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:29:20" (1/1) ... [2021-12-21 15:29:20,796 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:29:20" (1/1) ... [2021-12-21 15:29:20,812 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:29:20" (1/1) ... [2021-12-21 15:29:20,813 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:29:20" (1/1) ... [2021-12-21 15:29:20,865 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:29:20" (1/1) ... [2021-12-21 15:29:20,870 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:29:20" (1/1) ... [2021-12-21 15:29:20,884 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:29:20" (1/1) ... [2021-12-21 15:29:20,900 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 15:29:20,905 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 15:29:20,905 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 15:29:20,906 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 15:29:20,907 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:29:20" (1/1) ... [2021-12-21 15:29:20,912 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 15:29:20,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:29:20,932 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) [2021-12-21 15:29:20,942 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 [2021-12-21 15:29:20,978 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2021-12-21 15:29:20,978 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2021-12-21 15:29:20,979 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_is_valid [2021-12-21 15:29:20,979 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_is_valid [2021-12-21 15:29:20,979 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 15:29:20,980 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-12-21 15:29:20,981 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-12-21 15:29:20,981 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_append [2021-12-21 15:29:20,981 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_append [2021-12-21 15:29:20,982 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 15:29:20,982 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2021-12-21 15:29:20,983 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2021-12-21 15:29:20,983 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-21 15:29:20,983 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-21 15:29:20,984 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-21 15:29:20,984 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 15:29:20,984 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-21 15:29:20,984 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_impl [2021-12-21 15:29:20,985 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_impl [2021-12-21 15:29:20,985 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 15:29:20,985 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 15:29:20,985 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-12-21 15:29:20,985 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-12-21 15:29:20,985 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-21 15:29:20,986 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-21 15:29:20,986 INFO L130 BoogieDeclarations]: Found specification of procedure my_memcpy [2021-12-21 15:29:20,986 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memcpy [2021-12-21 15:29:20,986 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 15:29:20,987 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-21 15:29:20,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-21 15:29:20,987 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-12-21 15:29:20,987 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-12-21 15:29:20,988 INFO L130 BoogieDeclarations]: Found specification of procedure assert_bytes_match [2021-12-21 15:29:20,988 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_bytes_match [2021-12-21 15:29:20,988 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-12-21 15:29:20,988 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-12-21 15:29:20,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 15:29:20,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 15:29:21,257 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 15:29:21,258 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 15:29:22,211 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 15:29:22,221 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 15:29:22,222 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-21 15:29:22,224 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 03:29:22 BoogieIcfgContainer [2021-12-21 15:29:22,224 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 15:29:22,226 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 15:29:22,226 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 15:29:22,229 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 15:29:22,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 03:29:18" (1/3) ... [2021-12-21 15:29:22,229 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@290a863e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 03:29:22, skipping insertion in model container [2021-12-21 15:29:22,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:29:20" (2/3) ... [2021-12-21 15:29:22,230 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@290a863e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 03:29:22, skipping insertion in model container [2021-12-21 15:29:22,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 03:29:22" (3/3) ... [2021-12-21 15:29:22,231 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_append_harness.i [2021-12-21 15:29:22,235 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 15:29:22,236 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 15:29:22,275 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 15:29:22,282 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 [2021-12-21 15:29:22,282 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 15:29:22,304 INFO L276 IsEmpty]: Start isEmpty. Operand has 170 states, 107 states have (on average 1.2149532710280373) internal successors, (130), 108 states have internal predecessors, (130), 48 states have call successors, (48), 13 states have call predecessors, (48), 13 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2021-12-21 15:29:22,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-21 15:29:22,311 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:29:22,312 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:29:22,312 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:29:22,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:29:22,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1617698357, now seen corresponding path program 1 times [2021-12-21 15:29:22,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:29:22,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559340498] [2021-12-21 15:29:22,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:29:22,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:29:22,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:22,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 15:29:22,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:22,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 15:29:22,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:22,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 15:29:22,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:22,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:29:22,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:22,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-21 15:29:22,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:22,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-21 15:29:22,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:22,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-21 15:29:22,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:22,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 15:29:22,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:22,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-21 15:29:22,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:22,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-21 15:29:22,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:22,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-21 15:29:22,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:22,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-21 15:29:22,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:22,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-21 15:29:22,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:23,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-21 15:29:23,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:23,026 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-12-21 15:29:23,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:29:23,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559340498] [2021-12-21 15:29:23,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559340498] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:29:23,028 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:29:23,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 15:29:23,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777392477] [2021-12-21 15:29:23,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:29:23,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 15:29:23,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:29:23,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 15:29:23,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 15:29:23,067 INFO L87 Difference]: Start difference. First operand has 170 states, 107 states have (on average 1.2149532710280373) internal successors, (130), 108 states have internal predecessors, (130), 48 states have call successors, (48), 13 states have call predecessors, (48), 13 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 1 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-21 15:29:23,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:29:23,355 INFO L93 Difference]: Finished difference Result 336 states and 480 transitions. [2021-12-21 15:29:23,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 15:29:23,358 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 1 states have call predecessors, (14), 2 states have call successors, (14) Word has length 97 [2021-12-21 15:29:23,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:29:23,372 INFO L225 Difference]: With dead ends: 336 [2021-12-21 15:29:23,373 INFO L226 Difference]: Without dead ends: 165 [2021-12-21 15:29:23,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 15:29:23,390 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 91 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 15:29:23,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 229 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 15:29:23,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-12-21 15:29:23,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2021-12-21 15:29:23,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 103 states have (on average 1.1941747572815533) internal successors, (123), 104 states have internal predecessors, (123), 48 states have call successors, (48), 13 states have call predecessors, (48), 13 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2021-12-21 15:29:23,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 218 transitions. [2021-12-21 15:29:23,453 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 218 transitions. Word has length 97 [2021-12-21 15:29:23,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:29:23,453 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 218 transitions. [2021-12-21 15:29:23,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 1 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-21 15:29:23,454 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 218 transitions. [2021-12-21 15:29:23,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-21 15:29:23,457 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:29:23,457 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:29:23,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 15:29:23,458 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:29:23,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:29:23,458 INFO L85 PathProgramCache]: Analyzing trace with hash -369216981, now seen corresponding path program 1 times [2021-12-21 15:29:23,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:29:23,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625099777] [2021-12-21 15:29:23,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:29:23,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:29:23,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:23,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 15:29:23,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:23,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 15:29:23,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:23,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 15:29:23,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:23,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:29:23,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:23,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-21 15:29:23,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:23,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-21 15:29:23,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:23,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-21 15:29:23,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:23,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 15:29:23,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:23,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-21 15:29:23,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:23,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-21 15:29:23,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:23,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-21 15:29:23,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:23,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-21 15:29:23,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:23,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-21 15:29:23,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:23,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-21 15:29:23,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:23,778 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-12-21 15:29:23,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:29:23,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625099777] [2021-12-21 15:29:23,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625099777] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:29:23,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679440034] [2021-12-21 15:29:23,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:29:23,780 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:29:23,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:29:23,783 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) [2021-12-21 15:29:23,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 15:29:24,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:24,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 2623 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 15:29:24,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:29:24,631 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-21 15:29:24,632 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 15:29:24,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679440034] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:29:24,632 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 15:29:24,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-12-21 15:29:24,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835342487] [2021-12-21 15:29:24,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:29:24,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 15:29:24,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:29:24,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 15:29:24,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-21 15:29:24,635 INFO L87 Difference]: Start difference. First operand 165 states and 218 transitions. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-12-21 15:29:24,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:29:24,808 INFO L93 Difference]: Finished difference Result 316 states and 421 transitions. [2021-12-21 15:29:24,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 15:29:24,809 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 97 [2021-12-21 15:29:24,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:29:24,815 INFO L225 Difference]: With dead ends: 316 [2021-12-21 15:29:24,815 INFO L226 Difference]: Without dead ends: 168 [2021-12-21 15:29:24,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-12-21 15:29:24,822 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 239 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 15:29:24,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 673 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 15:29:24,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-12-21 15:29:24,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2021-12-21 15:29:24,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 105 states have (on average 1.1904761904761905) internal successors, (125), 107 states have internal predecessors, (125), 48 states have call successors, (48), 13 states have call predecessors, (48), 14 states have return successors, (50), 47 states have call predecessors, (50), 47 states have call successors, (50) [2021-12-21 15:29:24,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 223 transitions. [2021-12-21 15:29:24,856 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 223 transitions. Word has length 97 [2021-12-21 15:29:24,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:29:24,856 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 223 transitions. [2021-12-21 15:29:24,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-12-21 15:29:24,857 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 223 transitions. [2021-12-21 15:29:24,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-21 15:29:24,862 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:29:24,862 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:29:24,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 15:29:25,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:29:25,078 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:29:25,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:29:25,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1220439414, now seen corresponding path program 1 times [2021-12-21 15:29:25,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:29:25,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951509462] [2021-12-21 15:29:25,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:29:25,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:29:25,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:25,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 15:29:25,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:25,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 15:29:25,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:25,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 15:29:25,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:25,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:29:25,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:25,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-21 15:29:25,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:25,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 15:29:25,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:25,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 15:29:25,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:25,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-21 15:29:25,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:25,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-21 15:29:25,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:25,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-21 15:29:25,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:25,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-21 15:29:25,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:25,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-21 15:29:25,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:25,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-21 15:29:25,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:25,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-21 15:29:25,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:25,426 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-12-21 15:29:25,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:29:25,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951509462] [2021-12-21 15:29:25,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951509462] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:29:25,427 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:29:25,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 15:29:25,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821267315] [2021-12-21 15:29:25,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:29:25,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 15:29:25,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:29:25,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 15:29:25,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-21 15:29:25,429 INFO L87 Difference]: Start difference. First operand 168 states and 223 transitions. Second operand has 8 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 4 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) [2021-12-21 15:29:25,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:29:25,961 INFO L93 Difference]: Finished difference Result 294 states and 391 transitions. [2021-12-21 15:29:25,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 15:29:25,961 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 4 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) Word has length 103 [2021-12-21 15:29:25,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:29:25,963 INFO L225 Difference]: With dead ends: 294 [2021-12-21 15:29:25,963 INFO L226 Difference]: Without dead ends: 165 [2021-12-21 15:29:25,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-12-21 15:29:25,965 INFO L933 BasicCegarLoop]: 177 mSDtfsCounter, 160 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 15:29:25,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 527 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 15:29:25,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-12-21 15:29:25,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2021-12-21 15:29:25,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 103 states have (on average 1.1844660194174756) internal successors, (122), 104 states have internal predecessors, (122), 48 states have call successors, (48), 13 states have call predecessors, (48), 13 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2021-12-21 15:29:25,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 217 transitions. [2021-12-21 15:29:25,986 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 217 transitions. Word has length 103 [2021-12-21 15:29:25,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:29:25,987 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 217 transitions. [2021-12-21 15:29:25,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 4 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) [2021-12-21 15:29:25,988 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 217 transitions. [2021-12-21 15:29:25,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-21 15:29:25,992 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:29:25,992 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:29:25,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 15:29:25,993 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:29:25,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:29:25,994 INFO L85 PathProgramCache]: Analyzing trace with hash 139910209, now seen corresponding path program 1 times [2021-12-21 15:29:25,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:29:25,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358911785] [2021-12-21 15:29:25,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:29:25,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:29:26,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:26,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 15:29:26,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:26,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 15:29:26,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:26,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 15:29:26,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:26,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:29:26,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:26,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-21 15:29:26,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:26,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 15:29:26,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:26,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 15:29:26,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:26,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-21 15:29:26,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:26,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-21 15:29:26,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:26,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-21 15:29:26,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:26,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-21 15:29:26,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:26,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-21 15:29:26,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:26,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-21 15:29:26,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:26,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-21 15:29:26,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:26,274 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-12-21 15:29:26,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:29:26,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358911785] [2021-12-21 15:29:26,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358911785] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:29:26,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611588223] [2021-12-21 15:29:26,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:29:26,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:29:26,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:29:26,278 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) [2021-12-21 15:29:26,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 15:29:26,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:26,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 2657 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 15:29:26,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:29:27,004 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 64 proven. 15 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-21 15:29:27,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:29:27,251 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-12-21 15:29:27,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611588223] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:29:27,251 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:29:27,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2021-12-21 15:29:27,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318079985] [2021-12-21 15:29:27,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:29:27,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-21 15:29:27,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:29:27,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-21 15:29:27,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-12-21 15:29:27,254 INFO L87 Difference]: Start difference. First operand 165 states and 217 transitions. Second operand has 12 states, 12 states have (on average 9.75) internal successors, (117), 11 states have internal predecessors, (117), 7 states have call successors, (38), 4 states have call predecessors, (38), 5 states have return successors, (36), 7 states have call predecessors, (36), 7 states have call successors, (36) [2021-12-21 15:29:27,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:29:27,722 INFO L93 Difference]: Finished difference Result 296 states and 394 transitions. [2021-12-21 15:29:27,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 15:29:27,723 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 9.75) internal successors, (117), 11 states have internal predecessors, (117), 7 states have call successors, (38), 4 states have call predecessors, (38), 5 states have return successors, (36), 7 states have call predecessors, (36), 7 states have call successors, (36) Word has length 109 [2021-12-21 15:29:27,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:29:27,725 INFO L225 Difference]: With dead ends: 296 [2021-12-21 15:29:27,725 INFO L226 Difference]: Without dead ends: 168 [2021-12-21 15:29:27,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-12-21 15:29:27,727 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 281 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 15:29:27,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 329 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 15:29:27,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-12-21 15:29:27,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2021-12-21 15:29:27,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 105 states have (on average 1.180952380952381) internal successors, (124), 107 states have internal predecessors, (124), 48 states have call successors, (48), 13 states have call predecessors, (48), 14 states have return successors, (50), 47 states have call predecessors, (50), 47 states have call successors, (50) [2021-12-21 15:29:27,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 222 transitions. [2021-12-21 15:29:27,739 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 222 transitions. Word has length 109 [2021-12-21 15:29:27,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:29:27,740 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 222 transitions. [2021-12-21 15:29:27,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.75) internal successors, (117), 11 states have internal predecessors, (117), 7 states have call successors, (38), 4 states have call predecessors, (38), 5 states have return successors, (36), 7 states have call predecessors, (36), 7 states have call successors, (36) [2021-12-21 15:29:27,740 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 222 transitions. [2021-12-21 15:29:27,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-21 15:29:27,741 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:29:27,742 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:29:27,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 15:29:27,955 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,SelfDestructingSolverStorable3 [2021-12-21 15:29:27,956 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:29:27,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:29:27,956 INFO L85 PathProgramCache]: Analyzing trace with hash -2020813690, now seen corresponding path program 1 times [2021-12-21 15:29:27,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:29:27,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147802711] [2021-12-21 15:29:27,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:29:27,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:29:28,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:28,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 15:29:28,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:28,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 15:29:28,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:28,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 15:29:28,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:28,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:29:28,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:28,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-21 15:29:28,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:28,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 15:29:28,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:28,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 15:29:28,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:28,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-21 15:29:28,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:28,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-21 15:29:28,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:28,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-21 15:29:28,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:28,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-21 15:29:28,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:28,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-21 15:29:28,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:28,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-21 15:29:28,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:28,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-21 15:29:28,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:28,301 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-12-21 15:29:28,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:29:28,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147802711] [2021-12-21 15:29:28,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147802711] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:29:28,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889849243] [2021-12-21 15:29:28,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:29:28,302 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:29:28,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:29:28,304 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) [2021-12-21 15:29:28,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 15:29:28,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:28,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 2662 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-21 15:29:28,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:29:29,061 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 28 proven. 50 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-21 15:29:29,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:29:29,334 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-12-21 15:29:29,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889849243] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-21 15:29:29,335 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-21 15:29:29,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11, 8] total 21 [2021-12-21 15:29:29,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741820047] [2021-12-21 15:29:29,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:29:29,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 15:29:29,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:29:29,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 15:29:29,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-12-21 15:29:29,337 INFO L87 Difference]: Start difference. First operand 168 states and 222 transitions. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 states have internal predecessors, (51), 5 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-12-21 15:29:29,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:29:29,629 INFO L93 Difference]: Finished difference Result 291 states and 384 transitions. [2021-12-21 15:29:29,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 15:29:29,630 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 states have internal predecessors, (51), 5 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 111 [2021-12-21 15:29:29,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:29:29,631 INFO L225 Difference]: With dead ends: 291 [2021-12-21 15:29:29,631 INFO L226 Difference]: Without dead ends: 165 [2021-12-21 15:29:29,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2021-12-21 15:29:29,633 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 230 mSDsluCounter, 785 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 954 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 15:29:29,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 954 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 15:29:29,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-12-21 15:29:29,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2021-12-21 15:29:29,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 103 states have (on average 1.174757281553398) internal successors, (121), 104 states have internal predecessors, (121), 48 states have call successors, (48), 13 states have call predecessors, (48), 13 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2021-12-21 15:29:29,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 216 transitions. [2021-12-21 15:29:29,647 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 216 transitions. Word has length 111 [2021-12-21 15:29:29,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:29:29,647 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 216 transitions. [2021-12-21 15:29:29,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 states have internal predecessors, (51), 5 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-12-21 15:29:29,648 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 216 transitions. [2021-12-21 15:29:29,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-21 15:29:29,649 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:29:29,649 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:29:29,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 15:29:29,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:29:29,872 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:29:29,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:29:29,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1770709749, now seen corresponding path program 1 times [2021-12-21 15:29:29,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:29:29,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793017620] [2021-12-21 15:29:29,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:29:29,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:29:30,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:30,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 15:29:30,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:30,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 15:29:30,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:30,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 15:29:30,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:30,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:29:30,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:30,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-21 15:29:30,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:30,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 15:29:30,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:30,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 15:29:30,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:30,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-21 15:29:30,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:30,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-21 15:29:30,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:30,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-21 15:29:30,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:30,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-21 15:29:30,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:30,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-21 15:29:30,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:30,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-21 15:29:30,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:30,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-21 15:29:30,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:30,355 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-12-21 15:29:30,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:29:30,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793017620] [2021-12-21 15:29:30,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793017620] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:29:30,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043335582] [2021-12-21 15:29:30,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:29:30,356 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:29:30,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:29:30,358 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) [2021-12-21 15:29:30,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 15:29:30,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:30,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 2667 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-21 15:29:30,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:29:31,663 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-12-21 15:29:31,695 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 60 proven. 6 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-21 15:29:31,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:29:31,834 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2021-12-21 15:29:31,883 INFO L353 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-12-21 15:29:31,883 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2021-12-21 15:29:31,970 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-12-21 15:29:31,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043335582] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:29:31,970 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:29:31,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 17 [2021-12-21 15:29:31,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979441428] [2021-12-21 15:29:31,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:29:31,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-21 15:29:31,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:29:31,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-21 15:29:31,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-12-21 15:29:31,973 INFO L87 Difference]: Start difference. First operand 165 states and 216 transitions. Second operand has 17 states, 17 states have (on average 5.176470588235294) internal successors, (88), 14 states have internal predecessors, (88), 7 states have call successors, (26), 6 states have call predecessors, (26), 3 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2021-12-21 15:29:33,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:29:33,550 INFO L93 Difference]: Finished difference Result 362 states and 481 transitions. [2021-12-21 15:29:33,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-21 15:29:33,551 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.176470588235294) internal successors, (88), 14 states have internal predecessors, (88), 7 states have call successors, (26), 6 states have call predecessors, (26), 3 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) Word has length 113 [2021-12-21 15:29:33,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:29:33,553 INFO L225 Difference]: With dead ends: 362 [2021-12-21 15:29:33,553 INFO L226 Difference]: Without dead ends: 246 [2021-12-21 15:29:33,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 238 SyntacticMatches, 13 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=179, Invalid=943, Unknown=0, NotChecked=0, Total=1122 [2021-12-21 15:29:33,555 INFO L933 BasicCegarLoop]: 208 mSDtfsCounter, 205 mSDsluCounter, 821 mSDsCounter, 0 mSdLazyCounter, 1636 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 1029 SdHoareTripleChecker+Invalid, 2330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 595 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-21 15:29:33,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 1029 Invalid, 2330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1636 Invalid, 0 Unknown, 595 Unchecked, 1.2s Time] [2021-12-21 15:29:33,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-12-21 15:29:33,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 231. [2021-12-21 15:29:33,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 151 states have (on average 1.185430463576159) internal successors, (179), 151 states have internal predecessors, (179), 61 states have call successors, (61), 18 states have call predecessors, (61), 18 states have return successors, (66), 61 states have call predecessors, (66), 60 states have call successors, (66) [2021-12-21 15:29:33,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 306 transitions. [2021-12-21 15:29:33,590 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 306 transitions. Word has length 113 [2021-12-21 15:29:33,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:29:33,590 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 306 transitions. [2021-12-21 15:29:33,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.176470588235294) internal successors, (88), 14 states have internal predecessors, (88), 7 states have call successors, (26), 6 states have call predecessors, (26), 3 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2021-12-21 15:29:33,591 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 306 transitions. [2021-12-21 15:29:33,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-12-21 15:29:33,592 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:29:33,593 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:29:33,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 15:29:33,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:29:33,806 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:29:33,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:29:33,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1925736603, now seen corresponding path program 1 times [2021-12-21 15:29:33,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:29:33,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494641262] [2021-12-21 15:29:33,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:29:33,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:29:33,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:34,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 15:29:34,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:34,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 15:29:34,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:34,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 15:29:34,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:34,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:29:34,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:34,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-21 15:29:34,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:34,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 15:29:34,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:34,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 15:29:34,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:34,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-21 15:29:34,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:34,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-21 15:29:34,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:34,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-21 15:29:34,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:34,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-21 15:29:34,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:34,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-21 15:29:34,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:34,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-21 15:29:34,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:34,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-21 15:29:34,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:34,189 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-12-21 15:29:34,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:29:34,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494641262] [2021-12-21 15:29:34,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494641262] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:29:34,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426542687] [2021-12-21 15:29:34,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:29:34,190 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:29:34,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:29:34,191 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) [2021-12-21 15:29:34,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-21 15:29:34,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:34,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 2691 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-21 15:29:34,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:29:34,934 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 77 proven. 3 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-21 15:29:34,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:29:35,326 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-12-21 15:29:35,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426542687] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:29:35,327 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:29:35,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 11] total 20 [2021-12-21 15:29:35,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132450657] [2021-12-21 15:29:35,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:29:35,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-21 15:29:35,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:29:35,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-21 15:29:35,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2021-12-21 15:29:35,329 INFO L87 Difference]: Start difference. First operand 231 states and 306 transitions. Second operand has 20 states, 17 states have (on average 5.588235294117647) internal successors, (95), 15 states have internal predecessors, (95), 5 states have call successors, (24), 4 states have call predecessors, (24), 7 states have return successors, (23), 5 states have call predecessors, (23), 5 states have call successors, (23) [2021-12-21 15:29:36,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:29:36,426 INFO L93 Difference]: Finished difference Result 404 states and 540 transitions. [2021-12-21 15:29:36,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-21 15:29:36,428 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 5.588235294117647) internal successors, (95), 15 states have internal predecessors, (95), 5 states have call successors, (24), 4 states have call predecessors, (24), 7 states have return successors, (23), 5 states have call predecessors, (23), 5 states have call successors, (23) Word has length 121 [2021-12-21 15:29:36,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:29:36,430 INFO L225 Difference]: With dead ends: 404 [2021-12-21 15:29:36,430 INFO L226 Difference]: Without dead ends: 253 [2021-12-21 15:29:36,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 259 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2021-12-21 15:29:36,432 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 123 mSDsluCounter, 1387 mSDsCounter, 0 mSdLazyCounter, 1854 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 1573 SdHoareTripleChecker+Invalid, 1911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-21 15:29:36,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 1573 Invalid, 1911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1854 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-21 15:29:36,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-12-21 15:29:36,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 236. [2021-12-21 15:29:36,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 155 states have (on average 1.1806451612903226) internal successors, (183), 156 states have internal predecessors, (183), 61 states have call successors, (61), 18 states have call predecessors, (61), 19 states have return successors, (70), 61 states have call predecessors, (70), 60 states have call successors, (70) [2021-12-21 15:29:36,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 314 transitions. [2021-12-21 15:29:36,452 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 314 transitions. Word has length 121 [2021-12-21 15:29:36,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:29:36,452 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 314 transitions. [2021-12-21 15:29:36,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 5.588235294117647) internal successors, (95), 15 states have internal predecessors, (95), 5 states have call successors, (24), 4 states have call predecessors, (24), 7 states have return successors, (23), 5 states have call predecessors, (23), 5 states have call successors, (23) [2021-12-21 15:29:36,453 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 314 transitions. [2021-12-21 15:29:36,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-21 15:29:36,454 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:29:36,454 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:29:36,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-21 15:29:36,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:29:36,676 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:29:36,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:29:36,676 INFO L85 PathProgramCache]: Analyzing trace with hash -508813440, now seen corresponding path program 1 times [2021-12-21 15:29:36,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:29:36,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312507228] [2021-12-21 15:29:36,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:29:36,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:29:36,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:36,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 15:29:36,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:36,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 15:29:36,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:36,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 15:29:36,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:36,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:29:36,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:36,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-21 15:29:36,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:36,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 15:29:36,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:36,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 15:29:36,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:37,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-21 15:29:37,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:37,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-21 15:29:37,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:37,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-21 15:29:37,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:37,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-21 15:29:37,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:37,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-21 15:29:37,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:37,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-21 15:29:37,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:37,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-21 15:29:37,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:37,095 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-21 15:29:37,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:29:37,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312507228] [2021-12-21 15:29:37,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312507228] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:29:37,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199995068] [2021-12-21 15:29:37,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:29:37,097 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:29:37,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:29:37,098 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) [2021-12-21 15:29:37,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-21 15:29:37,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:37,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 2696 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-21 15:29:37,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:29:37,762 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-21 15:29:37,762 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 15:29:37,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199995068] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:29:37,763 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 15:29:37,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 8 [2021-12-21 15:29:37,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112783790] [2021-12-21 15:29:37,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:29:37,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 15:29:37,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:29:37,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 15:29:37,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-21 15:29:37,764 INFO L87 Difference]: Start difference. First operand 236 states and 314 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-21 15:29:37,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:29:37,938 INFO L93 Difference]: Finished difference Result 410 states and 550 transitions. [2021-12-21 15:29:37,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 15:29:37,938 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 123 [2021-12-21 15:29:37,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:29:37,940 INFO L225 Difference]: With dead ends: 410 [2021-12-21 15:29:37,940 INFO L226 Difference]: Without dead ends: 243 [2021-12-21 15:29:37,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 149 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-21 15:29:37,941 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 15 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 756 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 15:29:37,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 756 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 39 Unchecked, 0.1s Time] [2021-12-21 15:29:37,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-12-21 15:29:37,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 236. [2021-12-21 15:29:37,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 155 states have (on average 1.167741935483871) internal successors, (181), 156 states have internal predecessors, (181), 61 states have call successors, (61), 18 states have call predecessors, (61), 19 states have return successors, (70), 61 states have call predecessors, (70), 60 states have call successors, (70) [2021-12-21 15:29:37,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 312 transitions. [2021-12-21 15:29:37,957 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 312 transitions. Word has length 123 [2021-12-21 15:29:37,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:29:37,958 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 312 transitions. [2021-12-21 15:29:37,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-21 15:29:37,958 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 312 transitions. [2021-12-21 15:29:37,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-21 15:29:37,960 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:29:37,961 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:29:37,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-21 15:29:38,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:29:38,168 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:29:38,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:29:38,168 INFO L85 PathProgramCache]: Analyzing trace with hash 752103810, now seen corresponding path program 1 times [2021-12-21 15:29:38,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:29:38,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911314129] [2021-12-21 15:29:38,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:29:38,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:29:38,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:38,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 15:29:38,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:38,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 15:29:38,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:38,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 15:29:38,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:38,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:29:38,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:38,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-21 15:29:38,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:38,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 15:29:38,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:38,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 15:29:38,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:38,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-21 15:29:38,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:38,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-21 15:29:38,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:38,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-21 15:29:38,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:38,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-21 15:29:38,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:38,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-21 15:29:38,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:38,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-21 15:29:38,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:38,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-21 15:29:38,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:38,543 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-12-21 15:29:38,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:29:38,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911314129] [2021-12-21 15:29:38,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911314129] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:29:38,544 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:29:38,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-21 15:29:38,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362979551] [2021-12-21 15:29:38,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:29:38,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 15:29:38,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:29:38,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 15:29:38,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-12-21 15:29:38,545 INFO L87 Difference]: Start difference. First operand 236 states and 312 transitions. Second operand has 10 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 states have internal predecessors, (61), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-21 15:29:39,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:29:39,186 INFO L93 Difference]: Finished difference Result 389 states and 513 transitions. [2021-12-21 15:29:39,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 15:29:39,186 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 states have internal predecessors, (61), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 123 [2021-12-21 15:29:39,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:29:39,188 INFO L225 Difference]: With dead ends: 389 [2021-12-21 15:29:39,188 INFO L226 Difference]: Without dead ends: 236 [2021-12-21 15:29:39,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-12-21 15:29:39,189 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 99 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 928 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 891 SdHoareTripleChecker+Invalid, 978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 15:29:39,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 891 Invalid, 978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 928 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 15:29:39,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-12-21 15:29:39,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2021-12-21 15:29:39,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 155 states have (on average 1.1612903225806452) internal successors, (180), 156 states have internal predecessors, (180), 61 states have call successors, (61), 18 states have call predecessors, (61), 19 states have return successors, (69), 61 states have call predecessors, (69), 60 states have call successors, (69) [2021-12-21 15:29:39,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 310 transitions. [2021-12-21 15:29:39,211 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 310 transitions. Word has length 123 [2021-12-21 15:29:39,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:29:39,212 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 310 transitions. [2021-12-21 15:29:39,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 states have internal predecessors, (61), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-21 15:29:39,213 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 310 transitions. [2021-12-21 15:29:39,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-12-21 15:29:39,214 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:29:39,214 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:29:39,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 15:29:39,215 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:29:39,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:29:39,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1377085930, now seen corresponding path program 1 times [2021-12-21 15:29:39,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:29:39,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420684575] [2021-12-21 15:29:39,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:29:39,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:29:39,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:39,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 15:29:39,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:39,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 15:29:39,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:39,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 15:29:39,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:39,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:29:39,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:39,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-21 15:29:39,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:39,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 15:29:39,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:39,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 15:29:39,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:39,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-21 15:29:39,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:39,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-21 15:29:39,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:39,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-21 15:29:39,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:39,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-21 15:29:39,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:39,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-21 15:29:39,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:39,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-21 15:29:39,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:39,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-21 15:29:39,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:39,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-21 15:29:39,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:39,548 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2021-12-21 15:29:39,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:29:39,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420684575] [2021-12-21 15:29:39,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420684575] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:29:39,549 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:29:39,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 15:29:39,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306142172] [2021-12-21 15:29:39,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:29:39,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 15:29:39,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:29:39,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 15:29:39,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-21 15:29:39,552 INFO L87 Difference]: Start difference. First operand 236 states and 310 transitions. Second operand has 9 states, 8 states have (on average 7.25) internal successors, (58), 6 states have internal predecessors, (58), 2 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-12-21 15:29:40,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:29:40,104 INFO L93 Difference]: Finished difference Result 254 states and 334 transitions. [2021-12-21 15:29:40,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 15:29:40,105 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 7.25) internal successors, (58), 6 states have internal predecessors, (58), 2 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) Word has length 131 [2021-12-21 15:29:40,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:29:40,107 INFO L225 Difference]: With dead ends: 254 [2021-12-21 15:29:40,107 INFO L226 Difference]: Without dead ends: 252 [2021-12-21 15:29:40,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-12-21 15:29:40,108 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 115 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 811 SdHoareTripleChecker+Invalid, 789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 15:29:40,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 811 Invalid, 789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 15:29:40,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-12-21 15:29:40,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 246. [2021-12-21 15:29:40,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 161 states have (on average 1.15527950310559) internal successors, (186), 163 states have internal predecessors, (186), 63 states have call successors, (63), 19 states have call predecessors, (63), 21 states have return successors, (77), 63 states have call predecessors, (77), 62 states have call successors, (77) [2021-12-21 15:29:40,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 326 transitions. [2021-12-21 15:29:40,132 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 326 transitions. Word has length 131 [2021-12-21 15:29:40,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:29:40,133 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 326 transitions. [2021-12-21 15:29:40,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.25) internal successors, (58), 6 states have internal predecessors, (58), 2 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-12-21 15:29:40,133 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 326 transitions. [2021-12-21 15:29:40,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-21 15:29:40,134 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:29:40,134 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:29:40,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-21 15:29:40,135 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:29:40,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:29:40,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1113949143, now seen corresponding path program 1 times [2021-12-21 15:29:40,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:29:40,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324086299] [2021-12-21 15:29:40,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:29:40,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:29:40,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:40,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 15:29:40,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:40,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 15:29:40,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:40,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 15:29:40,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:40,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:29:40,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:40,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-21 15:29:40,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:40,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 15:29:40,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:40,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 15:29:40,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:40,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-21 15:29:40,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:40,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-21 15:29:40,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:40,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-21 15:29:40,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:40,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-21 15:29:40,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:40,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-21 15:29:40,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:40,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-21 15:29:40,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:40,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-21 15:29:40,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:40,675 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-12-21 15:29:40,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:29:40,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324086299] [2021-12-21 15:29:40,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324086299] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:29:40,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795563935] [2021-12-21 15:29:40,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:29:40,676 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:29:40,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:29:40,677 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 15:29:40,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-21 15:29:41,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:41,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 2711 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-21 15:29:41,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:29:41,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-21 15:29:41,570 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-21 15:29:41,571 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 15:29:41,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795563935] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:29:41,571 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 15:29:41,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 17 [2021-12-21 15:29:41,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093171578] [2021-12-21 15:29:41,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:29:41,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-21 15:29:41,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:29:41,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-21 15:29:41,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-12-21 15:29:41,573 INFO L87 Difference]: Start difference. First operand 246 states and 326 transitions. Second operand has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 10 states have internal predecessors, (68), 5 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-12-21 15:29:41,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:29:41,637 INFO L93 Difference]: Finished difference Result 492 states and 649 transitions. [2021-12-21 15:29:41,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 15:29:41,637 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 10 states have internal predecessors, (68), 5 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 125 [2021-12-21 15:29:41,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:29:41,639 INFO L225 Difference]: With dead ends: 492 [2021-12-21 15:29:41,639 INFO L226 Difference]: Without dead ends: 259 [2021-12-21 15:29:41,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-12-21 15:29:41,641 INFO L933 BasicCegarLoop]: 210 mSDtfsCounter, 32 mSDsluCounter, 1003 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 1213 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 15:29:41,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 1213 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 64 Unchecked, 0.0s Time] [2021-12-21 15:29:41,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-12-21 15:29:41,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2021-12-21 15:29:41,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 173 states have (on average 1.1618497109826589) internal successors, (201), 175 states have internal predecessors, (201), 63 states have call successors, (63), 20 states have call predecessors, (63), 22 states have return successors, (77), 63 states have call predecessors, (77), 62 states have call successors, (77) [2021-12-21 15:29:41,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 341 transitions. [2021-12-21 15:29:41,656 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 341 transitions. Word has length 125 [2021-12-21 15:29:41,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:29:41,657 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 341 transitions. [2021-12-21 15:29:41,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 10 states have internal predecessors, (68), 5 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-12-21 15:29:41,657 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 341 transitions. [2021-12-21 15:29:41,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-21 15:29:41,658 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:29:41,659 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:29:41,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-21 15:29:41,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:29:41,875 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:29:41,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:29:41,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1997458133, now seen corresponding path program 1 times [2021-12-21 15:29:41,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:29:41,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658124771] [2021-12-21 15:29:41,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:29:41,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:29:41,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:41,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 15:29:41,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:41,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 15:29:41,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:41,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 15:29:41,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:41,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:29:41,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:41,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-21 15:29:42,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:42,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 15:29:42,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:42,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 15:29:42,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:42,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-21 15:29:42,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:42,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-21 15:29:42,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:42,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-21 15:29:42,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:42,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-21 15:29:42,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:42,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-21 15:29:42,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:42,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-21 15:29:42,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:42,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-21 15:29:42,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:42,085 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-12-21 15:29:42,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:29:42,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658124771] [2021-12-21 15:29:42,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658124771] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:29:42,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995154436] [2021-12-21 15:29:42,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:29:42,086 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:29:42,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:29:42,087 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 15:29:42,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-21 15:29:42,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:42,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 2706 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 15:29:42,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:29:42,730 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-21 15:29:42,731 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 15:29:42,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995154436] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:29:42,731 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 15:29:42,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2021-12-21 15:29:42,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377705807] [2021-12-21 15:29:42,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:29:42,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 15:29:42,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:29:42,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 15:29:42,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 15:29:42,733 INFO L87 Difference]: Start difference. First operand 259 states and 341 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-21 15:29:42,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:29:42,763 INFO L93 Difference]: Finished difference Result 508 states and 681 transitions. [2021-12-21 15:29:42,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 15:29:42,763 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 125 [2021-12-21 15:29:42,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:29:42,765 INFO L225 Difference]: With dead ends: 508 [2021-12-21 15:29:42,765 INFO L226 Difference]: Without dead ends: 275 [2021-12-21 15:29:42,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-21 15:29:42,767 INFO L933 BasicCegarLoop]: 226 mSDtfsCounter, 20 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 15:29:42,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 637 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 15:29:42,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-12-21 15:29:42,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 255. [2021-12-21 15:29:42,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 170 states have (on average 1.1588235294117648) internal successors, (197), 171 states have internal predecessors, (197), 63 states have call successors, (63), 20 states have call predecessors, (63), 21 states have return successors, (76), 63 states have call predecessors, (76), 62 states have call successors, (76) [2021-12-21 15:29:42,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 336 transitions. [2021-12-21 15:29:42,785 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 336 transitions. Word has length 125 [2021-12-21 15:29:42,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:29:42,786 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 336 transitions. [2021-12-21 15:29:42,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-21 15:29:42,786 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 336 transitions. [2021-12-21 15:29:42,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-21 15:29:42,788 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:29:42,788 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:29:42,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-21 15:29:42,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-21 15:29:42,995 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:29:42,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:29:42,996 INFO L85 PathProgramCache]: Analyzing trace with hash 265733617, now seen corresponding path program 1 times [2021-12-21 15:29:42,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:29:42,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508095503] [2021-12-21 15:29:42,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:29:42,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:29:43,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:43,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 15:29:43,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:43,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 15:29:43,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:43,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 15:29:43,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:43,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:29:43,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:43,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-21 15:29:43,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:43,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-21 15:29:43,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:43,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-21 15:29:43,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:43,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-21 15:29:43,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:43,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-21 15:29:43,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:43,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-21 15:29:43,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:43,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-21 15:29:43,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:43,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-21 15:29:43,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:43,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-21 15:29:43,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:43,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-21 15:29:43,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:43,349 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2021-12-21 15:29:43,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:29:43,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508095503] [2021-12-21 15:29:43,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508095503] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:29:43,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714051684] [2021-12-21 15:29:43,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:29:43,350 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:29:43,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:29:43,352 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 15:29:43,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-21 15:29:43,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:43,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 2723 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-21 15:29:43,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:29:44,060 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-21 15:29:44,061 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 15:29:44,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714051684] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:29:44,061 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 15:29:44,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2021-12-21 15:29:44,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636147120] [2021-12-21 15:29:44,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:29:44,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 15:29:44,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:29:44,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 15:29:44,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-12-21 15:29:44,063 INFO L87 Difference]: Start difference. First operand 255 states and 336 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-21 15:29:44,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:29:44,212 INFO L93 Difference]: Finished difference Result 528 states and 713 transitions. [2021-12-21 15:29:44,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 15:29:44,213 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 129 [2021-12-21 15:29:44,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:29:44,215 INFO L225 Difference]: With dead ends: 528 [2021-12-21 15:29:44,215 INFO L226 Difference]: Without dead ends: 295 [2021-12-21 15:29:44,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-12-21 15:29:44,219 INFO L933 BasicCegarLoop]: 217 mSDtfsCounter, 42 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 748 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 15:29:44,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 748 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 90 Invalid, 0 Unknown, 42 Unchecked, 0.1s Time] [2021-12-21 15:29:44,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-12-21 15:29:44,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 271. [2021-12-21 15:29:44,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 186 states have (on average 1.1720430107526882) internal successors, (218), 187 states have internal predecessors, (218), 63 states have call successors, (63), 20 states have call predecessors, (63), 21 states have return successors, (76), 63 states have call predecessors, (76), 62 states have call successors, (76) [2021-12-21 15:29:44,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 357 transitions. [2021-12-21 15:29:44,239 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 357 transitions. Word has length 129 [2021-12-21 15:29:44,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:29:44,240 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 357 transitions. [2021-12-21 15:29:44,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-21 15:29:44,240 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 357 transitions. [2021-12-21 15:29:44,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-21 15:29:44,242 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:29:44,242 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:29:44,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-21 15:29:44,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-21 15:29:44,447 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:29:44,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:29:44,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1353241297, now seen corresponding path program 1 times [2021-12-21 15:29:44,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:29:44,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372275909] [2021-12-21 15:29:44,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:29:44,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:29:44,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:44,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 15:29:44,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:44,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 15:29:44,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:44,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 15:29:44,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:44,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:29:44,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:44,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-21 15:29:44,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:44,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-21 15:29:44,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:44,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-21 15:29:44,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:44,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-21 15:29:44,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:44,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-21 15:29:44,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:44,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-21 15:29:44,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:44,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-21 15:29:44,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:44,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-21 15:29:44,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:44,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-21 15:29:44,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:44,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-21 15:29:44,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:44,761 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2021-12-21 15:29:44,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:29:44,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372275909] [2021-12-21 15:29:44,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372275909] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:29:44,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844976409] [2021-12-21 15:29:44,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:29:44,763 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:29:44,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:29:44,764 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 15:29:44,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-21 15:29:45,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:45,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 2718 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-21 15:29:45,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:29:45,481 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-21 15:29:45,481 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 15:29:45,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844976409] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:29:45,482 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 15:29:45,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 11 [2021-12-21 15:29:45,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150428875] [2021-12-21 15:29:45,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:29:45,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 15:29:45,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:29:45,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 15:29:45,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:29:45,483 INFO L87 Difference]: Start difference. First operand 271 states and 357 transitions. Second operand has 9 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-12-21 15:29:45,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:29:45,616 INFO L93 Difference]: Finished difference Result 528 states and 697 transitions. [2021-12-21 15:29:45,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 15:29:45,617 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 129 [2021-12-21 15:29:45,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:29:45,620 INFO L225 Difference]: With dead ends: 528 [2021-12-21 15:29:45,620 INFO L226 Difference]: Without dead ends: 281 [2021-12-21 15:29:45,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 154 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-12-21 15:29:45,622 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 12 mSDsluCounter, 1384 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1588 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 15:29:45,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1588 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 15:29:45,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-12-21 15:29:45,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 276. [2021-12-21 15:29:45,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 190 states have (on average 1.168421052631579) internal successors, (222), 192 states have internal predecessors, (222), 63 states have call successors, (63), 20 states have call predecessors, (63), 22 states have return successors, (81), 63 states have call predecessors, (81), 62 states have call successors, (81) [2021-12-21 15:29:45,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 366 transitions. [2021-12-21 15:29:45,637 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 366 transitions. Word has length 129 [2021-12-21 15:29:45,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:29:45,637 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 366 transitions. [2021-12-21 15:29:45,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-12-21 15:29:45,638 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 366 transitions. [2021-12-21 15:29:45,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-12-21 15:29:45,639 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:29:45,639 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:29:45,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-21 15:29:45,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-21 15:29:45,855 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:29:45,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:29:45,856 INFO L85 PathProgramCache]: Analyzing trace with hash 498704820, now seen corresponding path program 1 times [2021-12-21 15:29:45,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:29:45,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238204610] [2021-12-21 15:29:45,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:29:45,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:29:45,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:45,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 15:29:45,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:45,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 15:29:45,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:45,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 15:29:45,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:45,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:29:45,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:45,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-21 15:29:45,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:46,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 15:29:46,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:46,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-21 15:29:46,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:46,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-21 15:29:46,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:46,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-21 15:29:46,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:46,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-21 15:29:46,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:46,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-21 15:29:46,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:46,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-21 15:29:46,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:46,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-21 15:29:46,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:46,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-21 15:29:46,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:46,057 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-12-21 15:29:46,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:29:46,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238204610] [2021-12-21 15:29:46,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238204610] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:29:46,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497746892] [2021-12-21 15:29:46,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:29:46,058 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:29:46,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:29:46,059 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 15:29:46,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-21 15:29:46,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:46,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 2723 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 15:29:46,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:29:46,607 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-21 15:29:46,607 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 15:29:46,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497746892] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:29:46,608 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 15:29:46,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2021-12-21 15:29:46,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750121406] [2021-12-21 15:29:46,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:29:46,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 15:29:46,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:29:46,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 15:29:46,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 15:29:46,609 INFO L87 Difference]: Start difference. First operand 276 states and 366 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-21 15:29:46,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:29:46,638 INFO L93 Difference]: Finished difference Result 541 states and 725 transitions. [2021-12-21 15:29:46,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 15:29:46,639 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 131 [2021-12-21 15:29:46,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:29:46,641 INFO L225 Difference]: With dead ends: 541 [2021-12-21 15:29:46,641 INFO L226 Difference]: Without dead ends: 287 [2021-12-21 15:29:46,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-21 15:29:46,642 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 9 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 15:29:46,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 630 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 15:29:46,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-12-21 15:29:46,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 278. [2021-12-21 15:29:46,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 192 states have (on average 1.15625) internal successors, (222), 194 states have internal predecessors, (222), 63 states have call successors, (63), 20 states have call predecessors, (63), 22 states have return successors, (81), 63 states have call predecessors, (81), 62 states have call successors, (81) [2021-12-21 15:29:46,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 366 transitions. [2021-12-21 15:29:46,657 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 366 transitions. Word has length 131 [2021-12-21 15:29:46,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:29:46,657 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 366 transitions. [2021-12-21 15:29:46,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-21 15:29:46,658 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 366 transitions. [2021-12-21 15:29:46,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-12-21 15:29:46,659 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:29:46,659 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:29:46,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-21 15:29:46,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-21 15:29:46,867 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:29:46,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:29:46,868 INFO L85 PathProgramCache]: Analyzing trace with hash 248293624, now seen corresponding path program 1 times [2021-12-21 15:29:46,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:29:46,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652846461] [2021-12-21 15:29:46,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:29:46,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:29:46,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:46,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 15:29:46,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:46,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 15:29:46,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:46,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 15:29:46,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:46,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:29:46,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:46,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-21 15:29:46,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:46,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 15:29:46,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:46,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-21 15:29:47,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:47,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-21 15:29:47,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:47,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-21 15:29:47,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:47,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-21 15:29:47,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:47,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-21 15:29:47,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:47,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-21 15:29:47,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:47,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-21 15:29:47,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:47,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-21 15:29:47,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:47,062 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-12-21 15:29:47,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:29:47,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652846461] [2021-12-21 15:29:47,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652846461] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:29:47,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647534962] [2021-12-21 15:29:47,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:29:47,063 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:29:47,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:29:47,068 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 15:29:47,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-21 15:29:47,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:47,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 2725 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 15:29:47,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:29:47,624 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-21 15:29:47,624 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 15:29:47,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647534962] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:29:47,624 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 15:29:47,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2021-12-21 15:29:47,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840481759] [2021-12-21 15:29:47,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:29:47,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 15:29:47,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:29:47,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 15:29:47,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 15:29:47,626 INFO L87 Difference]: Start difference. First operand 278 states and 366 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-21 15:29:47,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:29:47,667 INFO L93 Difference]: Finished difference Result 552 states and 740 transitions. [2021-12-21 15:29:47,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 15:29:47,668 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 131 [2021-12-21 15:29:47,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:29:47,669 INFO L225 Difference]: With dead ends: 552 [2021-12-21 15:29:47,669 INFO L226 Difference]: Without dead ends: 296 [2021-12-21 15:29:47,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-21 15:29:47,671 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 34 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 15:29:47,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 628 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 15:29:47,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-12-21 15:29:47,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 272. [2021-12-21 15:29:47,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 186 states have (on average 1.1344086021505377) internal successors, (211), 188 states have internal predecessors, (211), 63 states have call successors, (63), 20 states have call predecessors, (63), 22 states have return successors, (81), 63 states have call predecessors, (81), 62 states have call successors, (81) [2021-12-21 15:29:47,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 355 transitions. [2021-12-21 15:29:47,686 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 355 transitions. Word has length 131 [2021-12-21 15:29:47,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:29:47,686 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 355 transitions. [2021-12-21 15:29:47,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-21 15:29:47,686 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 355 transitions. [2021-12-21 15:29:47,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-12-21 15:29:47,687 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:29:47,687 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:29:47,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-21 15:29:47,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-21 15:29:47,903 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:29:47,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:29:47,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1279334522, now seen corresponding path program 1 times [2021-12-21 15:29:47,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:29:47,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695162663] [2021-12-21 15:29:47,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:29:47,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:29:48,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:48,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 15:29:48,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:48,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 15:29:48,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:48,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 15:29:48,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:48,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:29:48,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:48,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-21 15:29:48,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:48,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 15:29:48,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:48,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-21 15:29:48,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:48,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-21 15:29:48,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:48,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-21 15:29:48,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:48,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-21 15:29:48,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:48,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-21 15:29:48,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:48,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-21 15:29:48,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:48,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-21 15:29:48,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:48,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-21 15:29:48,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:48,462 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-12-21 15:29:48,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:29:48,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695162663] [2021-12-21 15:29:48,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695162663] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:29:48,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269394191] [2021-12-21 15:29:48,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:29:48,463 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:29:48,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:29:48,464 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 15:29:48,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-21 15:29:48,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:48,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 2720 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-21 15:29:48,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:29:49,023 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-21 15:29:49,028 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-21 15:29:49,734 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-21 15:29:49,734 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 15:29:49,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269394191] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:29:49,735 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 15:29:49,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [12] total 19 [2021-12-21 15:29:49,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519200298] [2021-12-21 15:29:49,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:29:49,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-21 15:29:49,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:29:49,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-21 15:29:49,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-12-21 15:29:49,736 INFO L87 Difference]: Start difference. First operand 272 states and 355 transitions. Second operand has 13 states, 13 states have (on average 6.6923076923076925) internal successors, (87), 12 states have internal predecessors, (87), 6 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2021-12-21 15:29:49,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:29:49,894 INFO L93 Difference]: Finished difference Result 614 states and 793 transitions. [2021-12-21 15:29:49,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 15:29:49,895 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.6923076923076925) internal successors, (87), 12 states have internal predecessors, (87), 6 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 131 [2021-12-21 15:29:49,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:29:49,898 INFO L225 Difference]: With dead ends: 614 [2021-12-21 15:29:49,898 INFO L226 Difference]: Without dead ends: 424 [2021-12-21 15:29:49,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 143 SyntacticMatches, 9 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-12-21 15:29:49,899 INFO L933 BasicCegarLoop]: 261 mSDtfsCounter, 65 mSDsluCounter, 875 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 1136 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 15:29:49,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 1136 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 99 Invalid, 0 Unknown, 84 Unchecked, 0.1s Time] [2021-12-21 15:29:49,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-12-21 15:29:49,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 390. [2021-12-21 15:29:49,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 285 states have (on average 1.143859649122807) internal successors, (326), 290 states have internal predecessors, (326), 74 states have call successors, (74), 28 states have call predecessors, (74), 30 states have return successors, (98), 71 states have call predecessors, (98), 73 states have call successors, (98) [2021-12-21 15:29:49,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 498 transitions. [2021-12-21 15:29:49,919 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 498 transitions. Word has length 131 [2021-12-21 15:29:49,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:29:49,920 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 498 transitions. [2021-12-21 15:29:49,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.6923076923076925) internal successors, (87), 12 states have internal predecessors, (87), 6 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2021-12-21 15:29:49,920 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 498 transitions. [2021-12-21 15:29:49,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-12-21 15:29:49,922 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:29:49,922 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:29:49,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-21 15:29:50,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-21 15:29:50,147 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:29:50,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:29:50,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1498189240, now seen corresponding path program 1 times [2021-12-21 15:29:50,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:29:50,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679788912] [2021-12-21 15:29:50,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:29:50,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:29:50,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:50,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 15:29:50,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:50,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 15:29:50,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:50,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 15:29:50,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:50,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:29:50,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:50,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-21 15:29:50,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:50,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 15:29:50,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:50,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-21 15:29:50,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:50,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-21 15:29:50,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:50,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-21 15:29:50,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:50,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-21 15:29:50,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:50,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-21 15:29:50,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:50,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-21 15:29:50,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:50,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-21 15:29:50,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:50,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-21 15:29:50,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:50,347 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-21 15:29:50,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:29:50,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679788912] [2021-12-21 15:29:50,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679788912] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:29:50,348 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:29:50,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 15:29:50,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298976333] [2021-12-21 15:29:50,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:29:50,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 15:29:50,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:29:50,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 15:29:50,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 15:29:50,350 INFO L87 Difference]: Start difference. First operand 390 states and 498 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-21 15:29:50,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:29:50,660 INFO L93 Difference]: Finished difference Result 650 states and 844 transitions. [2021-12-21 15:29:50,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 15:29:50,660 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 131 [2021-12-21 15:29:50,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:29:50,663 INFO L225 Difference]: With dead ends: 650 [2021-12-21 15:29:50,663 INFO L226 Difference]: Without dead ends: 380 [2021-12-21 15:29:50,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-21 15:29:50,664 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 95 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 15:29:50,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 425 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 15:29:50,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-12-21 15:29:50,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 377. [2021-12-21 15:29:50,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 273 states have (on average 1.1391941391941391) internal successors, (311), 277 states have internal predecessors, (311), 74 states have call successors, (74), 28 states have call predecessors, (74), 29 states have return successors, (96), 71 states have call predecessors, (96), 73 states have call successors, (96) [2021-12-21 15:29:50,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 481 transitions. [2021-12-21 15:29:50,686 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 481 transitions. Word has length 131 [2021-12-21 15:29:50,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:29:50,686 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 481 transitions. [2021-12-21 15:29:50,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-21 15:29:50,686 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 481 transitions. [2021-12-21 15:29:50,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-21 15:29:50,689 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:29:50,689 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:29:50,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-21 15:29:50,689 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:29:50,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:29:50,689 INFO L85 PathProgramCache]: Analyzing trace with hash -245639284, now seen corresponding path program 1 times [2021-12-21 15:29:50,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:29:50,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221684767] [2021-12-21 15:29:50,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:29:50,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:29:50,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:51,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 15:29:51,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:51,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 15:29:51,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:51,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 15:29:51,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:51,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:29:51,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:51,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-21 15:29:51,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:51,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 15:29:51,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:51,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-21 15:29:51,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:51,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-21 15:29:51,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:51,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-21 15:29:51,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:51,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:29:51,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:51,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-21 15:29:51,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:51,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-21 15:29:51,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:51,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-21 15:29:51,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:51,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-21 15:29:51,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:51,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-21 15:29:51,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:51,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-21 15:29:51,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:51,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-12-21 15:29:51,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:51,346 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-12-21 15:29:51,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:29:51,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221684767] [2021-12-21 15:29:51,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221684767] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:29:51,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830232797] [2021-12-21 15:29:51,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:29:51,347 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:29:51,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:29:51,352 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 15:29:51,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-21 15:29:51,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:29:51,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 2750 conjuncts, 70 conjunts are in the unsatisfiable core [2021-12-21 15:29:51,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:29:51,939 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-21 15:30:00,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 15:30:00,646 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23