./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be32_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_write_be32_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 2d2088ac57520281350e2a5a3a1c8295b6f3f6b1edc40c64fce86e2816b5a5aa --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 15:30:33,184 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 15:30:33,186 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 15:30:33,236 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 15:30:33,236 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 15:30:33,239 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 15:30:33,241 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 15:30:33,245 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 15:30:33,247 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 15:30:33,251 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 15:30:33,252 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 15:30:33,253 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 15:30:33,253 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 15:30:33,255 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 15:30:33,256 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 15:30:33,260 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 15:30:33,260 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 15:30:33,261 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 15:30:33,262 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 15:30:33,266 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 15:30:33,267 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 15:30:33,268 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 15:30:33,269 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 15:30:33,270 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 15:30:33,273 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 15:30:33,273 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 15:30:33,273 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 15:30:33,274 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 15:30:33,275 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 15:30:33,275 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 15:30:33,276 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 15:30:33,276 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 15:30:33,278 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 15:30:33,278 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 15:30:33,279 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 15:30:33,279 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 15:30:33,280 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 15:30:33,280 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 15:30:33,280 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 15:30:33,281 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 15:30:33,281 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 15:30:33,282 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-21 15:30:33,310 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 15:30:33,312 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 15:30:33,312 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 15:30:33,313 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 15:30:33,313 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 15:30:33,313 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 15:30:33,314 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 15:30:33,314 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 15:30:33,314 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 15:30:33,314 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 15:30:33,315 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 15:30:33,315 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 15:30:33,315 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 15:30:33,316 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 15:30:33,316 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 15:30:33,316 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 15:30:33,316 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 15:30:33,316 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 15:30:33,316 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 15:30:33,317 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 15:30:33,317 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 15:30:33,317 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 15:30:33,317 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 15:30:33,317 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 15:30:33,317 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 15:30:33,317 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 15:30:33,318 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 15:30:33,319 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 15:30:33,319 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 15:30:33,319 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 15:30:33,319 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 15:30:33,319 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2d2088ac57520281350e2a5a3a1c8295b6f3f6b1edc40c64fce86e2816b5a5aa [2021-12-21 15:30:33,496 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 15:30:33,516 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 15:30:33,518 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 15:30:33,519 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 15:30:33,519 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 15:30:33,520 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be32_harness.i [2021-12-21 15:30:33,567 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c55844f1/7414d4e265764646a350b76a8a3bbafb/FLAGe00f07da3 [2021-12-21 15:30:34,132 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 15:30:34,133 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be32_harness.i [2021-12-21 15:30:34,156 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c55844f1/7414d4e265764646a350b76a8a3bbafb/FLAGe00f07da3 [2021-12-21 15:30:34,607 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c55844f1/7414d4e265764646a350b76a8a3bbafb [2021-12-21 15:30:34,609 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 15:30:34,610 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 15:30:34,612 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 15:30:34,612 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 15:30:34,618 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 15:30:34,618 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 03:30:34" (1/1) ... [2021-12-21 15:30:34,619 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c5c5b63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:30:34, skipping insertion in model container [2021-12-21 15:30:34,619 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 03:30:34" (1/1) ... [2021-12-21 15:30:34,625 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 15:30:34,702 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 15:30:34,934 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be32_harness.i[4497,4510] [2021-12-21 15:30:34,940 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be32_harness.i[4557,4570] [2021-12-21 15:30:35,547 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:30:35,548 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:30:35,548 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:30:35,548 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:30:35,549 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:30:35,558 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:30:35,559 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:30:35,560 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:30:35,560 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:30:35,763 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-21 15:30:35,766 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-21 15:30:35,767 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-21 15:30:35,767 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-21 15:30:35,768 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-21 15:30:35,769 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-21 15:30:35,769 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-21 15:30:35,770 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-21 15:30:35,770 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-21 15:30:35,770 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-21 15:30:35,864 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-21 15:30:35,984 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:30:35,988 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:30:36,026 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 15:30:36,068 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 15:30:36,085 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be32_harness.i[4497,4510] [2021-12-21 15:30:36,087 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be32_harness.i[4557,4570] [2021-12-21 15:30:36,116 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:30:36,117 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:30:36,117 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:30:36,118 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:30:36,119 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:30:36,128 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:30:36,129 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:30:36,130 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:30:36,130 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:30:36,165 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-21 15:30:36,166 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-21 15:30:36,166 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-21 15:30:36,167 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-21 15:30:36,169 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-21 15:30:36,169 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-21 15:30:36,170 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-21 15:30:36,170 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-21 15:30:36,170 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-21 15:30:36,171 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-21 15:30:36,188 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-21 15:30:36,258 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:30:36,258 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:30:36,284 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 15:30:36,447 INFO L208 MainTranslator]: Completed translation [2021-12-21 15:30:36,448 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:30:36 WrapperNode [2021-12-21 15:30:36,448 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 15:30:36,449 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 15:30:36,449 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 15:30:36,449 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 15:30:36,454 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:30:36" (1/1) ... [2021-12-21 15:30:36,554 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:30:36" (1/1) ... [2021-12-21 15:30:36,624 INFO L137 Inliner]: procedures = 691, calls = 2619, calls flagged for inlining = 62, calls inlined = 9, statements flattened = 861 [2021-12-21 15:30:36,625 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 15:30:36,626 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 15:30:36,626 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 15:30:36,626 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 15:30:36,634 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:30:36" (1/1) ... [2021-12-21 15:30:36,634 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:30:36" (1/1) ... [2021-12-21 15:30:36,645 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:30:36" (1/1) ... [2021-12-21 15:30:36,645 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:30:36" (1/1) ... [2021-12-21 15:30:36,678 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:30:36" (1/1) ... [2021-12-21 15:30:36,684 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:30:36" (1/1) ... [2021-12-21 15:30:36,704 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:30:36" (1/1) ... [2021-12-21 15:30:36,712 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 15:30:36,715 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 15:30:36,716 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 15:30:36,716 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 15:30:36,717 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:30:36" (1/1) ... [2021-12-21 15:30:36,722 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 15:30:36,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:30:36,753 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 15:30:36,770 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 15:30:36,783 INFO L130 BoogieDeclarations]: Found specification of procedure htonl [2021-12-21 15:30:36,783 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2021-12-21 15:30:36,783 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2021-12-21 15:30:36,784 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hton32 [2021-12-21 15:30:36,784 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hton32 [2021-12-21 15:30:36,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 15:30:36,784 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-12-21 15:30:36,784 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-12-21 15:30:36,784 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 15:30:36,785 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-21 15:30:36,785 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-21 15:30:36,786 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-21 15:30:36,786 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 15:30:36,786 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-21 15:30:36,786 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_impl [2021-12-21 15:30:36,786 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_impl [2021-12-21 15:30:36,786 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 15:30:36,787 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 15:30:36,787 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-12-21 15:30:36,787 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-12-21 15:30:36,787 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-12-21 15:30:36,787 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-12-21 15:30:36,787 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-21 15:30:36,787 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-21 15:30:36,788 INFO L130 BoogieDeclarations]: Found specification of procedure my_memcpy [2021-12-21 15:30:36,788 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memcpy [2021-12-21 15:30:36,788 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 15:30:36,788 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-21 15:30:36,788 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_write [2021-12-21 15:30:36,789 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_write [2021-12-21 15:30:36,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-21 15:30:36,789 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-12-21 15:30:36,789 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-12-21 15:30:36,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 15:30:36,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 15:30:37,018 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 15:30:37,020 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 15:30:37,812 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 15:30:37,819 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 15:30:37,820 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-21 15:30:37,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 03:30:37 BoogieIcfgContainer [2021-12-21 15:30:37,822 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 15:30:37,824 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 15:30:37,824 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 15:30:37,827 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 15:30:37,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 03:30:34" (1/3) ... [2021-12-21 15:30:37,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4524fc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 03:30:37, skipping insertion in model container [2021-12-21 15:30:37,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:30:36" (2/3) ... [2021-12-21 15:30:37,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4524fc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 03:30:37, skipping insertion in model container [2021-12-21 15:30:37,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 03:30:37" (3/3) ... [2021-12-21 15:30:37,830 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_write_be32_harness.i [2021-12-21 15:30:37,834 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 15:30:37,834 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 15:30:37,872 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 15:30:37,885 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 15:30:37,886 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 15:30:37,901 INFO L276 IsEmpty]: Start isEmpty. Operand has 136 states, 88 states have (on average 1.2272727272727273) internal successors, (108), 89 states have internal predecessors, (108), 35 states have call successors, (35), 11 states have call predecessors, (35), 11 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2021-12-21 15:30:37,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-21 15:30:37,910 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:30:37,911 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:30:37,912 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:30:37,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:30:37,916 INFO L85 PathProgramCache]: Analyzing trace with hash -187599697, now seen corresponding path program 1 times [2021-12-21 15:30:37,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:30:37,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355466293] [2021-12-21 15:30:37,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:30:37,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:30:38,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:38,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 15:30:38,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:38,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 15:30:38,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:38,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 15:30:38,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:38,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:30:38,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:38,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-21 15:30:38,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:38,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-21 15:30:38,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:38,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-21 15:30:38,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:38,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 15:30:38,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:38,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-21 15:30:38,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:38,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-21 15:30:38,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:38,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-21 15:30:38,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:38,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-21 15:30:38,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:38,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-21 15:30:38,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:38,500 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-21 15:30:38,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:30:38,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355466293] [2021-12-21 15:30:38,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355466293] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:30:38,501 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:30:38,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 15:30:38,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790262508] [2021-12-21 15:30:38,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:30:38,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 15:30:38,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:30:38,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 15:30:38,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 15:30:38,533 INFO L87 Difference]: Start difference. First operand has 136 states, 88 states have (on average 1.2272727272727273) internal successors, (108), 89 states have internal predecessors, (108), 35 states have call successors, (35), 11 states have call predecessors, (35), 11 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-21 15:30:38,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:30:38,769 INFO L93 Difference]: Finished difference Result 268 states and 377 transitions. [2021-12-21 15:30:38,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 15:30:38,772 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) Word has length 90 [2021-12-21 15:30:38,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:30:38,779 INFO L225 Difference]: With dead ends: 268 [2021-12-21 15:30:38,779 INFO L226 Difference]: Without dead ends: 131 [2021-12-21 15:30:38,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 34 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 15:30:38,791 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 64 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 15:30:38,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 195 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 15:30:38,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-12-21 15:30:38,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2021-12-21 15:30:38,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 84 states have (on average 1.2023809523809523) internal successors, (101), 85 states have internal predecessors, (101), 35 states have call successors, (35), 11 states have call predecessors, (35), 11 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-12-21 15:30:38,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 170 transitions. [2021-12-21 15:30:38,842 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 170 transitions. Word has length 90 [2021-12-21 15:30:38,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:30:38,842 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 170 transitions. [2021-12-21 15:30:38,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-21 15:30:38,843 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 170 transitions. [2021-12-21 15:30:38,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-21 15:30:38,848 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:30:38,848 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:30:38,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 15:30:38,848 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:30:38,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:30:38,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1729750963, now seen corresponding path program 1 times [2021-12-21 15:30:38,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:30:38,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371918457] [2021-12-21 15:30:38,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:30:38,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:30:38,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:39,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 15:30:39,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:39,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 15:30:39,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:39,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 15:30:39,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:39,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:30:39,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:39,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-21 15:30:39,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:39,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-21 15:30:39,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:39,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-21 15:30:39,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:39,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 15:30:39,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:39,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-21 15:30:39,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:39,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-21 15:30:39,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:39,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-21 15:30:39,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:39,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-21 15:30:39,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:39,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-21 15:30:39,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:39,191 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-21 15:30:39,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:30:39,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371918457] [2021-12-21 15:30:39,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371918457] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:30:39,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230828481] [2021-12-21 15:30:39,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:30:39,192 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:30:39,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:30:39,193 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 15:30:39,194 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 15:30:39,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:39,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 2630 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 15:30:39,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:30:39,863 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-21 15:30:39,863 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 15:30:39,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230828481] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:30:39,863 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 15:30:39,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-12-21 15:30:39,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972540469] [2021-12-21 15:30:39,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:30:39,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 15:30:39,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:30:39,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 15:30:39,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-21 15:30:39,866 INFO L87 Difference]: Start difference. First operand 131 states and 170 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-12-21 15:30:40,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:30:40,028 INFO L93 Difference]: Finished difference Result 240 states and 319 transitions. [2021-12-21 15:30:40,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 15:30:40,029 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 90 [2021-12-21 15:30:40,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:30:40,031 INFO L225 Difference]: With dead ends: 240 [2021-12-21 15:30:40,031 INFO L226 Difference]: Without dead ends: 134 [2021-12-21 15:30:40,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-12-21 15:30:40,032 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 198 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 15:30:40,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 485 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 15:30:40,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-12-21 15:30:40,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2021-12-21 15:30:40,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 86 states have (on average 1.197674418604651) internal successors, (103), 88 states have internal predecessors, (103), 35 states have call successors, (35), 11 states have call predecessors, (35), 12 states have return successors, (38), 34 states have call predecessors, (38), 34 states have call successors, (38) [2021-12-21 15:30:40,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 176 transitions. [2021-12-21 15:30:40,049 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 176 transitions. Word has length 90 [2021-12-21 15:30:40,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:30:40,049 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 176 transitions. [2021-12-21 15:30:40,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-12-21 15:30:40,050 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 176 transitions. [2021-12-21 15:30:40,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-21 15:30:40,051 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:30:40,051 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:30:40,079 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 15:30:40,271 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 15:30:40,272 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:30:40,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:30:40,272 INFO L85 PathProgramCache]: Analyzing trace with hash -77726936, now seen corresponding path program 1 times [2021-12-21 15:30:40,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:30:40,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810763136] [2021-12-21 15:30:40,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:30:40,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:30:40,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:40,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 15:30:40,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:40,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 15:30:40,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:40,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 15:30:40,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:40,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:30:40,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:40,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-21 15:30:40,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:40,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 15:30:40,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:40,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 15:30:40,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:40,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-21 15:30:40,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:40,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-21 15:30:40,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:40,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-21 15:30:40,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:40,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-21 15:30:40,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:40,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-21 15:30:40,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:40,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-21 15:30:40,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:40,580 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-21 15:30:40,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:30:40,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810763136] [2021-12-21 15:30:40,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810763136] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:30:40,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439249014] [2021-12-21 15:30:40,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:30:40,583 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:30:40,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:30:40,584 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 15:30:40,585 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 15:30:40,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:40,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 2647 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-21 15:30:40,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:30:41,218 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-21 15:30:41,219 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 15:30:41,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439249014] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:30:41,219 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 15:30:41,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-12-21 15:30:41,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540657214] [2021-12-21 15:30:41,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:30:41,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 15:30:41,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:30:41,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 15:30:41,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-12-21 15:30:41,221 INFO L87 Difference]: Start difference. First operand 134 states and 176 transitions. Second operand has 7 states, 6 states have (on average 8.666666666666666) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-12-21 15:30:41,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:30:41,371 INFO L93 Difference]: Finished difference Result 235 states and 310 transitions. [2021-12-21 15:30:41,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 15:30:41,372 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 8.666666666666666) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 96 [2021-12-21 15:30:41,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:30:41,377 INFO L225 Difference]: With dead ends: 235 [2021-12-21 15:30:41,377 INFO L226 Difference]: Without dead ends: 134 [2021-12-21 15:30:41,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-12-21 15:30:41,380 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 215 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 15:30:41,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 494 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 15:30:41,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-12-21 15:30:41,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2021-12-21 15:30:41,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 86 states have (on average 1.197674418604651) internal successors, (103), 88 states have internal predecessors, (103), 35 states have call successors, (35), 11 states have call predecessors, (35), 12 states have return successors, (37), 34 states have call predecessors, (37), 34 states have call successors, (37) [2021-12-21 15:30:41,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 175 transitions. [2021-12-21 15:30:41,408 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 175 transitions. Word has length 96 [2021-12-21 15:30:41,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:30:41,408 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 175 transitions. [2021-12-21 15:30:41,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 8.666666666666666) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-12-21 15:30:41,409 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 175 transitions. [2021-12-21 15:30:41,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-21 15:30:41,412 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:30:41,413 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:30:41,434 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 15:30:41,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-12-21 15:30:41,620 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:30:41,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:30:41,620 INFO L85 PathProgramCache]: Analyzing trace with hash -2089043619, now seen corresponding path program 2 times [2021-12-21 15:30:41,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:30:41,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862646360] [2021-12-21 15:30:41,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:30:41,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:30:41,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:41,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 15:30:41,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:41,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 15:30:41,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:41,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 15:30:41,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:41,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:30:41,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:41,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-21 15:30:41,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:41,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 15:30:41,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:41,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 15:30:41,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:41,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-21 15:30:41,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:41,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-21 15:30:41,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:41,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-21 15:30:41,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:41,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-21 15:30:41,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:41,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-21 15:30:41,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:41,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-21 15:30:41,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:41,949 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-21 15:30:41,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:30:41,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862646360] [2021-12-21 15:30:41,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862646360] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:30:41,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891990342] [2021-12-21 15:30:41,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 15:30:41,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:30:41,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:30:41,956 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 15:30:41,957 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 15:30:42,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 15:30:42,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 15:30:42,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 2664 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-21 15:30:42,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:30:42,628 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-21 15:30:42,628 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 15:30:42,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891990342] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:30:42,628 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 15:30:42,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 16 [2021-12-21 15:30:42,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951579154] [2021-12-21 15:30:42,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:30:42,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 15:30:42,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:30:42,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 15:30:42,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-12-21 15:30:42,629 INFO L87 Difference]: Start difference. First operand 134 states and 175 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 5 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-12-21 15:30:42,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:30:42,845 INFO L93 Difference]: Finished difference Result 225 states and 296 transitions. [2021-12-21 15:30:42,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 15:30:42,846 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 5 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 102 [2021-12-21 15:30:42,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:30:42,847 INFO L225 Difference]: With dead ends: 225 [2021-12-21 15:30:42,847 INFO L226 Difference]: Without dead ends: 131 [2021-12-21 15:30:42,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-12-21 15:30:42,848 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 221 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 15:30:42,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 693 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 15:30:42,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-12-21 15:30:42,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2021-12-21 15:30:42,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 84 states have (on average 1.1904761904761905) internal successors, (100), 85 states have internal predecessors, (100), 35 states have call successors, (35), 11 states have call predecessors, (35), 11 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-12-21 15:30:42,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 169 transitions. [2021-12-21 15:30:42,855 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 169 transitions. Word has length 102 [2021-12-21 15:30:42,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:30:42,856 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 169 transitions. [2021-12-21 15:30:42,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 5 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-12-21 15:30:42,856 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 169 transitions. [2021-12-21 15:30:42,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-21 15:30:42,857 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:30:42,857 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:30:42,881 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 15:30:43,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:30:43,080 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:30:43,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:30:43,080 INFO L85 PathProgramCache]: Analyzing trace with hash 105172019, now seen corresponding path program 1 times [2021-12-21 15:30:43,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:30:43,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266348920] [2021-12-21 15:30:43,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:30:43,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:30:43,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:43,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 15:30:43,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:43,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 15:30:43,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:43,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 15:30:43,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:43,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:30:43,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:43,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-21 15:30:43,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:43,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 15:30:43,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:43,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 15:30:43,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:43,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-21 15:30:43,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:43,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-21 15:30:43,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:43,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-21 15:30:43,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:43,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-21 15:30:43,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:43,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-21 15:30:43,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:43,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-21 15:30:43,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:43,397 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-12-21 15:30:43,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:30:43,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266348920] [2021-12-21 15:30:43,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266348920] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:30:43,398 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:30:43,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 15:30:43,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557900598] [2021-12-21 15:30:43,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:30:43,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 15:30:43,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:30:43,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 15:30:43,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-21 15:30:43,400 INFO L87 Difference]: Start difference. First operand 131 states and 169 transitions. Second operand has 9 states, 8 states have (on average 5.625) internal successors, (45), 6 states have internal predecessors, (45), 2 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-12-21 15:30:43,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:30:43,826 INFO L93 Difference]: Finished difference Result 143 states and 186 transitions. [2021-12-21 15:30:43,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 15:30:43,827 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.625) internal successors, (45), 6 states have internal predecessors, (45), 2 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 114 [2021-12-21 15:30:43,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:30:43,828 INFO L225 Difference]: With dead ends: 143 [2021-12-21 15:30:43,828 INFO L226 Difference]: Without dead ends: 141 [2021-12-21 15:30:43,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 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 15:30:43,829 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 90 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 723 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 15:30:43,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 723 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 15:30:43,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-12-21 15:30:43,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2021-12-21 15:30:43,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 92 states have internal predecessors, (106), 36 states have call successors, (36), 12 states have call predecessors, (36), 13 states have return successors, (41), 35 states have call predecessors, (41), 35 states have call successors, (41) [2021-12-21 15:30:43,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 183 transitions. [2021-12-21 15:30:43,850 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 183 transitions. Word has length 114 [2021-12-21 15:30:43,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:30:43,851 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 183 transitions. [2021-12-21 15:30:43,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.625) internal successors, (45), 6 states have internal predecessors, (45), 2 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-12-21 15:30:43,852 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 183 transitions. [2021-12-21 15:30:43,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-21 15:30:43,853 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:30:43,853 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:30:43,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 15:30:43,853 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:30:43,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:30:43,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1045435077, now seen corresponding path program 1 times [2021-12-21 15:30:43,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:30:43,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333258283] [2021-12-21 15:30:43,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:30:43,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:30:44,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:44,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 15:30:44,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:44,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 15:30:44,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:44,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 15:30:44,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:44,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:30:44,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:44,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-21 15:30:44,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:44,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 15:30:44,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:44,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 15:30:44,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:44,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-21 15:30:44,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:44,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-21 15:30:44,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:44,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-21 15:30:44,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:44,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-21 15:30:44,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:44,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-21 15:30:44,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:44,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-21 15:30:44,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:44,244 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-12-21 15:30:44,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:30:44,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333258283] [2021-12-21 15:30:44,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333258283] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:30:44,245 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:30:44,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 15:30:44,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495351753] [2021-12-21 15:30:44,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:30:44,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 15:30:44,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:30:44,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 15:30:44,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 15:30:44,247 INFO L87 Difference]: Start difference. First operand 140 states and 183 transitions. Second operand has 6 states, 6 states have (on average 9.0) internal successors, (54), 5 states have internal predecessors, (54), 2 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-12-21 15:30:44,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:30:44,564 INFO L93 Difference]: Finished difference Result 280 states and 385 transitions. [2021-12-21 15:30:44,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 15:30:44,564 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 5 states have internal predecessors, (54), 2 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 118 [2021-12-21 15:30:44,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:30:44,566 INFO L225 Difference]: With dead ends: 280 [2021-12-21 15:30:44,566 INFO L226 Difference]: Without dead ends: 165 [2021-12-21 15:30:44,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-12-21 15:30:44,567 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 144 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 15:30:44,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 345 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 15:30:44,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-12-21 15:30:44,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 145. [2021-12-21 15:30:44,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 95 states have (on average 1.1894736842105262) internal successors, (113), 97 states have internal predecessors, (113), 36 states have call successors, (36), 12 states have call predecessors, (36), 13 states have return successors, (41), 35 states have call predecessors, (41), 35 states have call successors, (41) [2021-12-21 15:30:44,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 190 transitions. [2021-12-21 15:30:44,577 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 190 transitions. Word has length 118 [2021-12-21 15:30:44,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:30:44,578 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 190 transitions. [2021-12-21 15:30:44,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 5 states have internal predecessors, (54), 2 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-12-21 15:30:44,578 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 190 transitions. [2021-12-21 15:30:44,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-21 15:30:44,580 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:30:44,580 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:30:44,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 15:30:44,580 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:30:44,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:30:44,581 INFO L85 PathProgramCache]: Analyzing trace with hash -787269639, now seen corresponding path program 1 times [2021-12-21 15:30:44,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:30:44,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248152294] [2021-12-21 15:30:44,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:30:44,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:30:44,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:44,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 15:30:44,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:44,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 15:30:44,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:44,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 15:30:44,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:44,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:30:44,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:44,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-21 15:30:44,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:44,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 15:30:44,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:44,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 15:30:44,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:44,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-21 15:30:44,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:44,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-21 15:30:44,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:44,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-21 15:30:45,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:45,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-21 15:30:45,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:45,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-21 15:30:45,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:45,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-21 15:30:45,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:45,026 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-12-21 15:30:45,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:30:45,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248152294] [2021-12-21 15:30:45,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248152294] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:30:45,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167147728] [2021-12-21 15:30:45,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:30:45,027 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:30:45,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:30:45,028 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 15:30:45,030 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 15:30:45,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:45,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 2705 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-21 15:30:45,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:30:45,501 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 15:30:45,791 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-21 15:30:45,792 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 15:30:45,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167147728] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:30:45,792 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 15:30:45,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 17 [2021-12-21 15:30:45,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705297845] [2021-12-21 15:30:45,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:30:45,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-21 15:30:45,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:30:45,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-21 15:30:45,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-12-21 15:30:45,794 INFO L87 Difference]: Start difference. First operand 145 states and 190 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 10 states have internal predecessors, (59), 5 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-12-21 15:30:45,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:30:45,850 INFO L93 Difference]: Finished difference Result 288 states and 379 transitions. [2021-12-21 15:30:45,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 15:30:45,850 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 10 states have internal predecessors, (59), 5 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 118 [2021-12-21 15:30:45,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:30:45,851 INFO L225 Difference]: With dead ends: 288 [2021-12-21 15:30:45,851 INFO L226 Difference]: Without dead ends: 164 [2021-12-21 15:30:45,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 138 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 15:30:45,853 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 25 mSDsluCounter, 877 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 1041 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 15:30:45,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 1041 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 26 Invalid, 0 Unknown, 113 Unchecked, 0.0s Time] [2021-12-21 15:30:45,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-12-21 15:30:45,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2021-12-21 15:30:45,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 113 states have (on average 1.2035398230088497) internal successors, (136), 115 states have internal predecessors, (136), 36 states have call successors, (36), 13 states have call predecessors, (36), 14 states have return successors, (41), 35 states have call predecessors, (41), 35 states have call successors, (41) [2021-12-21 15:30:45,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 213 transitions. [2021-12-21 15:30:45,872 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 213 transitions. Word has length 118 [2021-12-21 15:30:45,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:30:45,873 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 213 transitions. [2021-12-21 15:30:45,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 10 states have internal predecessors, (59), 5 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-12-21 15:30:45,873 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 213 transitions. [2021-12-21 15:30:45,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-21 15:30:45,874 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:30:45,874 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:30:45,894 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-21 15:30:46,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:30:46,079 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:30:46,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:30:46,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1549122871, now seen corresponding path program 1 times [2021-12-21 15:30:46,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:30:46,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581816032] [2021-12-21 15:30:46,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:30:46,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:30:46,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:46,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 15:30:46,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:46,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 15:30:46,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:46,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 15:30:46,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:46,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:30:46,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:46,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-21 15:30:46,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:46,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 15:30:46,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:46,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 15:30:46,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:46,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-21 15:30:46,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:46,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-21 15:30:46,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:46,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-21 15:30:46,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:46,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-21 15:30:46,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:46,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-21 15:30:46,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:46,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-21 15:30:46,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:46,234 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-12-21 15:30:46,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:30:46,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581816032] [2021-12-21 15:30:46,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581816032] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:30:46,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251382024] [2021-12-21 15:30:46,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:30:46,235 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:30:46,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:30:46,236 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 15:30:46,237 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 15:30:46,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:46,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 2700 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 15:30:46,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:30:46,745 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-12-21 15:30:46,745 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 15:30:46,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251382024] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:30:46,745 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 15:30:46,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2021-12-21 15:30:46,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707467451] [2021-12-21 15:30:46,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:30:46,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 15:30:46,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:30:46,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 15:30:46,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 15:30:46,747 INFO L87 Difference]: Start difference. First operand 164 states and 213 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-21 15:30:46,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:30:46,770 INFO L93 Difference]: Finished difference Result 297 states and 397 transitions. [2021-12-21 15:30:46,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 15:30:46,771 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 118 [2021-12-21 15:30:46,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:30:46,773 INFO L225 Difference]: With dead ends: 297 [2021-12-21 15:30:46,774 INFO L226 Difference]: Without dead ends: 173 [2021-12-21 15:30:46,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-21 15:30:46,775 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 20 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 499 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 15:30:46,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 499 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 15:30:46,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-12-21 15:30:46,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 156. [2021-12-21 15:30:46,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 106 states have (on average 1.1981132075471699) internal successors, (127), 107 states have internal predecessors, (127), 36 states have call successors, (36), 13 states have call predecessors, (36), 13 states have return successors, (40), 35 states have call predecessors, (40), 35 states have call successors, (40) [2021-12-21 15:30:46,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 203 transitions. [2021-12-21 15:30:46,785 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 203 transitions. Word has length 118 [2021-12-21 15:30:46,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:30:46,786 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 203 transitions. [2021-12-21 15:30:46,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-21 15:30:46,786 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 203 transitions. [2021-12-21 15:30:46,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-12-21 15:30:46,787 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:30:46,787 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:30:46,816 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 15:30:46,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:30:47,000 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:30:47,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:30:47,000 INFO L85 PathProgramCache]: Analyzing trace with hash 351906291, now seen corresponding path program 2 times [2021-12-21 15:30:47,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:30:47,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710611451] [2021-12-21 15:30:47,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:30:47,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:30:47,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:47,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 15:30:47,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:47,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 15:30:47,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:47,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 15:30:47,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:47,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:30:47,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:47,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-21 15:30:47,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:47,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-21 15:30:47,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:47,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-21 15:30:47,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:47,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-21 15:30:47,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:47,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-21 15:30:47,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:47,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-21 15:30:47,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:47,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-21 15:30:47,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:47,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-21 15:30:47,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:47,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-21 15:30:47,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:47,270 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-21 15:30:47,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:30:47,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710611451] [2021-12-21 15:30:47,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710611451] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:30:47,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814340663] [2021-12-21 15:30:47,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 15:30:47,271 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:30:47,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:30:47,272 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 15:30:47,273 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 15:30:47,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 15:30:47,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 15:30:47,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 2712 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-21 15:30:47,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:30:48,622 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 85 proven. 4 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-21 15:30:48,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:30:49,073 INFO L353 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-12-21 15:30:49,073 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 15:30:49,081 INFO L353 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2021-12-21 15:30:49,081 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 24 treesize of output 12 [2021-12-21 15:30:49,196 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 44 proven. 10 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-12-21 15:30:49,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814340663] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:30:49,196 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:30:49,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 11] total 26 [2021-12-21 15:30:49,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348183030] [2021-12-21 15:30:49,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:30:49,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-21 15:30:49,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:30:49,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-21 15:30:49,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2021-12-21 15:30:49,198 INFO L87 Difference]: Start difference. First operand 156 states and 203 transitions. Second operand has 26 states, 25 states have (on average 4.36) internal successors, (109), 24 states have internal predecessors, (109), 4 states have call successors, (28), 4 states have call predecessors, (28), 7 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-12-21 15:30:50,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:30:50,867 INFO L93 Difference]: Finished difference Result 354 states and 476 transitions. [2021-12-21 15:30:50,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-21 15:30:50,868 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 4.36) internal successors, (109), 24 states have internal predecessors, (109), 4 states have call successors, (28), 4 states have call predecessors, (28), 7 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 122 [2021-12-21 15:30:50,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:30:50,870 INFO L225 Difference]: With dead ends: 354 [2021-12-21 15:30:50,870 INFO L226 Difference]: Without dead ends: 230 [2021-12-21 15:30:50,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 256 SyntacticMatches, 6 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=463, Invalid=2507, Unknown=0, NotChecked=0, Total=2970 [2021-12-21 15:30:50,875 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 334 mSDsluCounter, 1068 mSDsCounter, 0 mSdLazyCounter, 1677 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 1214 SdHoareTripleChecker+Invalid, 1989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 219 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-21 15:30:50,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [360 Valid, 1214 Invalid, 1989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1677 Invalid, 0 Unknown, 219 Unchecked, 0.9s Time] [2021-12-21 15:30:50,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-12-21 15:30:50,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 196. [2021-12-21 15:30:50,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 140 states have (on average 1.207142857142857) internal successors, (169), 142 states have internal predecessors, (169), 39 states have call successors, (39), 15 states have call predecessors, (39), 16 states have return successors, (49), 38 states have call predecessors, (49), 38 states have call successors, (49) [2021-12-21 15:30:50,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 257 transitions. [2021-12-21 15:30:50,889 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 257 transitions. Word has length 122 [2021-12-21 15:30:50,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:30:50,890 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 257 transitions. [2021-12-21 15:30:50,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 4.36) internal successors, (109), 24 states have internal predecessors, (109), 4 states have call successors, (28), 4 states have call predecessors, (28), 7 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-12-21 15:30:50,890 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 257 transitions. [2021-12-21 15:30:50,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-21 15:30:50,893 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:30:50,893 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:30:50,916 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 15:30:51,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:30:51,108 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:30:51,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:30:51,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1293675952, now seen corresponding path program 1 times [2021-12-21 15:30:51,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:30:51,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58404318] [2021-12-21 15:30:51,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:30:51,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:30:51,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:51,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 15:30:51,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:51,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 15:30:51,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:51,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 15:30:51,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:51,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:30:51,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:51,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-21 15:30:51,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:51,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 15:30:51,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:51,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-21 15:30:51,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:51,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-21 15:30:51,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:51,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-21 15:30:51,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:51,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-21 15:30:51,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:51,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-21 15:30:51,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:51,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-21 15:30:51,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:51,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-21 15:30:51,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:51,265 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-12-21 15:30:51,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:30:51,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58404318] [2021-12-21 15:30:51,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58404318] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:30:51,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854105099] [2021-12-21 15:30:51,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:30:51,266 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:30:51,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:30:51,267 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 15:30:51,299 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 15:30:51,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:51,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 2712 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 15:30:51,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:30:51,818 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-12-21 15:30:51,819 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 15:30:51,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854105099] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:30:51,819 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 15:30:51,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2021-12-21 15:30:51,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196444535] [2021-12-21 15:30:51,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:30:51,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 15:30:51,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:30:51,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 15:30:51,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 15:30:51,820 INFO L87 Difference]: Start difference. First operand 196 states and 257 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-21 15:30:51,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:30:51,842 INFO L93 Difference]: Finished difference Result 373 states and 498 transitions. [2021-12-21 15:30:51,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 15:30:51,842 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 124 [2021-12-21 15:30:51,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:30:51,844 INFO L225 Difference]: With dead ends: 373 [2021-12-21 15:30:51,844 INFO L226 Difference]: Without dead ends: 207 [2021-12-21 15:30:51,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 151 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 15:30:51,845 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 9 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 492 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 15:30:51,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 492 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 15:30:51,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-12-21 15:30:51,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 198. [2021-12-21 15:30:51,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 142 states have (on average 1.1901408450704225) internal successors, (169), 144 states have internal predecessors, (169), 39 states have call successors, (39), 15 states have call predecessors, (39), 16 states have return successors, (49), 38 states have call predecessors, (49), 38 states have call successors, (49) [2021-12-21 15:30:51,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 257 transitions. [2021-12-21 15:30:51,862 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 257 transitions. Word has length 124 [2021-12-21 15:30:51,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:30:51,862 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 257 transitions. [2021-12-21 15:30:51,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-21 15:30:51,862 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 257 transitions. [2021-12-21 15:30:51,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-21 15:30:51,863 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:30:51,863 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:30:51,899 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 15:30:52,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:30:52,075 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:30:52,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:30:52,076 INFO L85 PathProgramCache]: Analyzing trace with hash 445434604, now seen corresponding path program 1 times [2021-12-21 15:30:52,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:30:52,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462786880] [2021-12-21 15:30:52,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:30:52,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:30:52,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:52,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 15:30:52,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:52,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 15:30:52,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:52,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 15:30:52,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:52,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:30:52,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:52,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-21 15:30:52,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:52,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 15:30:52,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:52,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-21 15:30:52,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:52,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-21 15:30:52,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:52,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-21 15:30:52,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:52,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-21 15:30:52,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:52,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-21 15:30:52,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:52,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-21 15:30:52,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:52,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-21 15:30:52,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:52,225 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-21 15:30:52,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:30:52,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462786880] [2021-12-21 15:30:52,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462786880] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:30:52,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533275809] [2021-12-21 15:30:52,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:30:52,226 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:30:52,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:30:52,227 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 15:30:52,228 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 15:30:52,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:52,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 2714 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 15:30:52,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:30:52,786 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-12-21 15:30:52,786 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 15:30:52,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533275809] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:30:52,786 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 15:30:52,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2021-12-21 15:30:52,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195515053] [2021-12-21 15:30:52,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:30:52,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 15:30:52,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:30:52,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 15:30:52,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 15:30:52,788 INFO L87 Difference]: Start difference. First operand 198 states and 257 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-21 15:30:52,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:30:52,811 INFO L93 Difference]: Finished difference Result 380 states and 510 transitions. [2021-12-21 15:30:52,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 15:30:52,812 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 124 [2021-12-21 15:30:52,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:30:52,813 INFO L225 Difference]: With dead ends: 380 [2021-12-21 15:30:52,813 INFO L226 Difference]: Without dead ends: 212 [2021-12-21 15:30:52,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 151 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 15:30:52,815 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 34 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 490 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 15:30:52,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 490 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 15:30:52,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-12-21 15:30:52,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 194. [2021-12-21 15:30:52,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 138 states have (on average 1.1666666666666667) internal successors, (161), 140 states have internal predecessors, (161), 39 states have call successors, (39), 15 states have call predecessors, (39), 16 states have return successors, (49), 38 states have call predecessors, (49), 38 states have call successors, (49) [2021-12-21 15:30:52,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 249 transitions. [2021-12-21 15:30:52,824 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 249 transitions. Word has length 124 [2021-12-21 15:30:52,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:30:52,824 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 249 transitions. [2021-12-21 15:30:52,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-21 15:30:52,824 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 249 transitions. [2021-12-21 15:30:52,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-21 15:30:52,825 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:30:52,825 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:30:52,848 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 15:30:53,046 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,SelfDestructingSolverStorable10 [2021-12-21 15:30:53,046 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:30:53,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:30:53,046 INFO L85 PathProgramCache]: Analyzing trace with hash 416934314, now seen corresponding path program 2 times [2021-12-21 15:30:53,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:30:53,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127858771] [2021-12-21 15:30:53,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:30:53,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:30:53,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:53,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 15:30:53,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:53,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 15:30:53,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:53,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 15:30:53,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:53,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:30:53,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:53,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-21 15:30:53,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:53,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 15:30:53,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:53,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-21 15:30:53,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:53,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-21 15:30:53,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:53,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-21 15:30:53,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:53,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-21 15:30:53,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:53,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-21 15:30:53,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:53,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-21 15:30:53,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:53,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-21 15:30:53,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:53,492 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 44 proven. 8 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-21 15:30:53,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:30:53,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127858771] [2021-12-21 15:30:53,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127858771] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:30:53,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155254671] [2021-12-21 15:30:53,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 15:30:53,492 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:30:53,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:30:53,500 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 15:30:53,548 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 15:30:54,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 15:30:54,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 15:30:54,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 2709 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-21 15:30:54,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:30:54,261 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 13 treesize of output 9 [2021-12-21 15:30:54,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 15:30:54,474 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 20 treesize of output 19 [2021-12-21 15:30:54,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 15:30:54,698 INFO L353 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-12-21 15:30:54,698 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 1 [2021-12-21 15:30:54,768 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-21 15:30:54,768 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 15:30:54,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155254671] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:30:54,769 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 15:30:54,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 24 [2021-12-21 15:30:54,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538628011] [2021-12-21 15:30:54,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:30:54,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-21 15:30:54,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:30:54,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-21 15:30:54,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-12-21 15:30:54,770 INFO L87 Difference]: Start difference. First operand 194 states and 249 transitions. Second operand has 13 states, 12 states have (on average 6.583333333333333) internal successors, (79), 12 states have internal predecessors, (79), 6 states have call successors, (15), 3 states have call predecessors, (15), 5 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2021-12-21 15:30:54,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:30:54,922 INFO L93 Difference]: Finished difference Result 430 states and 560 transitions. [2021-12-21 15:30:54,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 15:30:54,923 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 6.583333333333333) internal successors, (79), 12 states have internal predecessors, (79), 6 states have call successors, (15), 3 states have call predecessors, (15), 5 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) Word has length 124 [2021-12-21 15:30:54,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:30:54,925 INFO L225 Difference]: With dead ends: 430 [2021-12-21 15:30:54,925 INFO L226 Difference]: Without dead ends: 268 [2021-12-21 15:30:54,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 134 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-12-21 15:30:54,926 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 40 mSDsluCounter, 1356 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 1543 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 15:30:54,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 1543 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 123 Invalid, 0 Unknown, 83 Unchecked, 0.1s Time] [2021-12-21 15:30:54,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-12-21 15:30:54,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 232. [2021-12-21 15:30:54,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 171 states have (on average 1.1695906432748537) internal successors, (200), 174 states have internal predecessors, (200), 41 states have call successors, (41), 17 states have call predecessors, (41), 19 states have return successors, (54), 40 states have call predecessors, (54), 40 states have call successors, (54) [2021-12-21 15:30:54,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 295 transitions. [2021-12-21 15:30:54,935 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 295 transitions. Word has length 124 [2021-12-21 15:30:54,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:30:54,935 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 295 transitions. [2021-12-21 15:30:54,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 6.583333333333333) internal successors, (79), 12 states have internal predecessors, (79), 6 states have call successors, (15), 3 states have call predecessors, (15), 5 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2021-12-21 15:30:54,935 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 295 transitions. [2021-12-21 15:30:54,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-21 15:30:54,936 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:30:54,937 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:30:54,975 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 15:30:55,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:30:55,151 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:30:55,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:30:55,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1541640472, now seen corresponding path program 1 times [2021-12-21 15:30:55,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:30:55,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294491890] [2021-12-21 15:30:55,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:30:55,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:30:55,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:55,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 15:30:55,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:55,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 15:30:55,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:55,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 15:30:55,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:55,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:30:55,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:55,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-21 15:30:55,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:55,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 15:30:55,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:55,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-21 15:30:55,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:55,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-21 15:30:55,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:55,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-21 15:30:55,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:55,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-21 15:30:55,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:55,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-21 15:30:55,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:55,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-21 15:30:55,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:55,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-21 15:30:55,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:55,509 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 44 proven. 8 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-21 15:30:55,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:30:55,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294491890] [2021-12-21 15:30:55,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294491890] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:30:55,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834702445] [2021-12-21 15:30:55,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:30:55,510 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:30:55,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:30:55,511 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 15:30:55,520 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 15:30:55,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:55,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 2714 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-21 15:30:55,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:30:56,045 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 6 treesize of output 5 [2021-12-21 15:30:56,050 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 13 treesize of output 9 [2021-12-21 15:30:56,526 INFO L353 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-12-21 15:30:56,526 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 29 treesize of output 11 [2021-12-21 15:30:56,529 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-12-21 15:30:56,639 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-21 15:30:56,639 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 15:30:56,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834702445] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:30:56,639 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 15:30:56,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [12] total 25 [2021-12-21 15:30:56,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493464134] [2021-12-21 15:30:56,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:30:56,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-21 15:30:56,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:30:56,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-21 15:30:56,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-12-21 15:30:56,642 INFO L87 Difference]: Start difference. First operand 232 states and 295 transitions. Second operand has 15 states, 15 states have (on average 4.6) internal successors, (69), 11 states have internal predecessors, (69), 6 states have call successors, (15), 4 states have call predecessors, (15), 5 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2021-12-21 15:30:57,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:30:57,195 INFO L93 Difference]: Finished difference Result 455 states and 589 transitions. [2021-12-21 15:30:57,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-21 15:30:57,196 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 11 states have internal predecessors, (69), 6 states have call successors, (15), 4 states have call predecessors, (15), 5 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) Word has length 124 [2021-12-21 15:30:57,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:30:57,197 INFO L225 Difference]: With dead ends: 455 [2021-12-21 15:30:57,197 INFO L226 Difference]: Without dead ends: 288 [2021-12-21 15:30:57,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2021-12-21 15:30:57,199 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 277 mSDsluCounter, 978 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 1153 SdHoareTripleChecker+Invalid, 1411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 602 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 15:30:57,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 1153 Invalid, 1411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 699 Invalid, 0 Unknown, 602 Unchecked, 0.5s Time] [2021-12-21 15:30:57,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-12-21 15:30:57,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 250. [2021-12-21 15:30:57,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 187 states have (on average 1.1550802139037433) internal successors, (216), 191 states have internal predecessors, (216), 41 states have call successors, (41), 18 states have call predecessors, (41), 21 states have return successors, (54), 40 states have call predecessors, (54), 40 states have call successors, (54) [2021-12-21 15:30:57,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 311 transitions. [2021-12-21 15:30:57,208 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 311 transitions. Word has length 124 [2021-12-21 15:30:57,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:30:57,208 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 311 transitions. [2021-12-21 15:30:57,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 11 states have internal predecessors, (69), 6 states have call successors, (15), 4 states have call predecessors, (15), 5 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2021-12-21 15:30:57,208 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 311 transitions. [2021-12-21 15:30:57,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-21 15:30:57,210 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:30:57,210 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:30:57,243 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 15:30:57,432 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,SelfDestructingSolverStorable12 [2021-12-21 15:30:57,432 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:30:57,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:30:57,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1208551716, now seen corresponding path program 3 times [2021-12-21 15:30:57,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:30:57,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435250459] [2021-12-21 15:30:57,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:30:57,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:30:57,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:57,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 15:30:57,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:57,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 15:30:57,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:57,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 15:30:57,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:57,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:30:57,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:57,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-21 15:30:57,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:57,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 15:30:57,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:57,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-21 15:30:57,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:57,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-21 15:30:57,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:57,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-21 15:30:57,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:57,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-21 15:30:57,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:57,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-21 15:30:57,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:57,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-21 15:30:57,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:57,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-21 15:30:57,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:57,672 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-12-21 15:30:57,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:30:57,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435250459] [2021-12-21 15:30:57,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435250459] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:30:57,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756454569] [2021-12-21 15:30:57,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 15:30:57,673 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:30:57,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:30:57,674 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 15:30:57,675 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 15:30:58,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-21 15:30:58,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 15:30:58,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 2423 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-21 15:30:58,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:30:58,659 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 87 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-21 15:30:58,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:30:58,998 INFO L353 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-12-21 15:30:58,998 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2021-12-21 15:30:59,103 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 48 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-12-21 15:30:59,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756454569] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:30:59,104 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:30:59,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 11] total 26 [2021-12-21 15:30:59,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409630070] [2021-12-21 15:30:59,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:30:59,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-21 15:30:59,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:30:59,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-21 15:30:59,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-12-21 15:30:59,105 INFO L87 Difference]: Start difference. First operand 250 states and 311 transitions. Second operand has 26 states, 25 states have (on average 4.48) internal successors, (112), 24 states have internal predecessors, (112), 4 states have call successors, (26), 4 states have call predecessors, (26), 7 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2021-12-21 15:31:01,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:31:01,075 INFO L93 Difference]: Finished difference Result 498 states and 624 transitions. [2021-12-21 15:31:01,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-21 15:31:01,076 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 4.48) internal successors, (112), 24 states have internal predecessors, (112), 4 states have call successors, (26), 4 states have call predecessors, (26), 7 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) Word has length 128 [2021-12-21 15:31:01,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:31:01,077 INFO L225 Difference]: With dead ends: 498 [2021-12-21 15:31:01,077 INFO L226 Difference]: Without dead ends: 291 [2021-12-21 15:31:01,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 265 SyntacticMatches, 9 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=672, Invalid=3110, Unknown=0, NotChecked=0, Total=3782 [2021-12-21 15:31:01,079 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 274 mSDsluCounter, 1195 mSDsCounter, 0 mSdLazyCounter, 1662 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 1347 SdHoareTripleChecker+Invalid, 2300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 565 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-21 15:31:01,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 1347 Invalid, 2300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1662 Invalid, 0 Unknown, 565 Unchecked, 0.9s Time] [2021-12-21 15:31:01,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-12-21 15:31:01,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 273. [2021-12-21 15:31:01,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 205 states have (on average 1.146341463414634) internal successors, (235), 209 states have internal predecessors, (235), 44 states have call successors, (44), 20 states have call predecessors, (44), 23 states have return successors, (61), 43 states have call predecessors, (61), 43 states have call successors, (61) [2021-12-21 15:31:01,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 340 transitions. [2021-12-21 15:31:01,089 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 340 transitions. Word has length 128 [2021-12-21 15:31:01,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:31:01,089 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 340 transitions. [2021-12-21 15:31:01,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 4.48) internal successors, (112), 24 states have internal predecessors, (112), 4 states have call successors, (26), 4 states have call predecessors, (26), 7 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2021-12-21 15:31:01,090 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 340 transitions. [2021-12-21 15:31:01,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-12-21 15:31:01,091 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:31:01,091 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:31:01,112 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 15:31:01,303 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,SelfDestructingSolverStorable13 [2021-12-21 15:31:01,303 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:31:01,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:31:01,304 INFO L85 PathProgramCache]: Analyzing trace with hash 267825245, now seen corresponding path program 1 times [2021-12-21 15:31:01,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:31:01,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405638561] [2021-12-21 15:31:01,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:31:01,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:31:01,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:01,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 15:31:01,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:01,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 15:31:01,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:01,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 15:31:01,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:01,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:31:01,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:01,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-21 15:31:01,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:01,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 15:31:01,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:01,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-21 15:31:01,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:01,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-21 15:31:01,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:01,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-21 15:31:01,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:01,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-21 15:31:01,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:01,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-21 15:31:01,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:01,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-21 15:31:01,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:01,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-21 15:31:01,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:01,687 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 48 proven. 8 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-21 15:31:01,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:31:01,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405638561] [2021-12-21 15:31:01,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405638561] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:31:01,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932002769] [2021-12-21 15:31:01,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:31:01,688 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:31:01,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:31:01,689 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 15:31:01,691 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 15:31:02,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:02,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 2720 conjuncts, 65 conjunts are in the unsatisfiable core [2021-12-21 15:31:02,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:31:02,261 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 13 treesize of output 9 [2021-12-21 15:31:02,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 15:31:02,450 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 20 treesize of output 19 [2021-12-21 15:31:02,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 15:31:02,711 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 20 treesize of output 19 [2021-12-21 15:31:02,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 15:31:02,981 INFO L353 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-12-21 15:31:02,981 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 1 [2021-12-21 15:31:03,017 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-21 15:31:03,017 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 15:31:03,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932002769] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:31:03,018 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 15:31:03,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [12] total 26 [2021-12-21 15:31:03,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408742224] [2021-12-21 15:31:03,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:31:03,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-21 15:31:03,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:31:03,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-21 15:31:03,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-12-21 15:31:03,019 INFO L87 Difference]: Start difference. First operand 273 states and 340 transitions. Second operand has 16 states, 14 states have (on average 5.5) internal successors, (77), 14 states have internal predecessors, (77), 8 states have call successors, (15), 4 states have call predecessors, (15), 5 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2021-12-21 15:31:03,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:31:03,182 INFO L93 Difference]: Finished difference Result 510 states and 640 transitions. [2021-12-21 15:31:03,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-21 15:31:03,183 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 5.5) internal successors, (77), 14 states have internal predecessors, (77), 8 states have call successors, (15), 4 states have call predecessors, (15), 5 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) Word has length 130 [2021-12-21 15:31:03,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:31:03,184 INFO L225 Difference]: With dead ends: 510 [2021-12-21 15:31:03,184 INFO L226 Difference]: Without dead ends: 360 [2021-12-21 15:31:03,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 132 SyntacticMatches, 11 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-12-21 15:31:03,187 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 45 mSDsluCounter, 1211 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 1414 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 15:31:03,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 1414 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 129 Invalid, 0 Unknown, 81 Unchecked, 0.1s Time] [2021-12-21 15:31:03,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-12-21 15:31:03,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 321. [2021-12-21 15:31:03,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 245 states have (on average 1.1428571428571428) internal successors, (280), 250 states have internal predecessors, (280), 48 states have call successors, (48), 24 states have call predecessors, (48), 27 states have return successors, (67), 46 states have call predecessors, (67), 47 states have call successors, (67) [2021-12-21 15:31:03,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 395 transitions. [2021-12-21 15:31:03,198 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 395 transitions. Word has length 130 [2021-12-21 15:31:03,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:31:03,198 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 395 transitions. [2021-12-21 15:31:03,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 5.5) internal successors, (77), 14 states have internal predecessors, (77), 8 states have call successors, (15), 4 states have call predecessors, (15), 5 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2021-12-21 15:31:03,199 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 395 transitions. [2021-12-21 15:31:03,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-12-21 15:31:03,200 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:31:03,200 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 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 15:31:03,222 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 15:31:03,421 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,SelfDestructingSolverStorable14 [2021-12-21 15:31:03,422 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:31:03,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:31:03,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1066235791, now seen corresponding path program 1 times [2021-12-21 15:31:03,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:31:03,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043322045] [2021-12-21 15:31:03,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:31:03,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:31:03,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:03,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 15:31:03,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:03,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 15:31:03,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:03,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 15:31:03,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:03,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:31:03,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:03,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-21 15:31:03,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:03,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 15:31:03,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:03,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-21 15:31:03,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:03,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-21 15:31:03,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:03,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-21 15:31:03,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:03,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-21 15:31:03,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:03,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-21 15:31:03,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:03,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-21 15:31:03,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:03,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-21 15:31:03,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:03,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-21 15:31:03,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:03,803 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 44 proven. 8 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-21 15:31:03,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:31:03,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043322045] [2021-12-21 15:31:03,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043322045] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:31:03,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948790500] [2021-12-21 15:31:03,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:31:03,804 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:31:03,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:31:03,807 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 15:31:03,809 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 15:31:04,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:04,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 2756 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-21 15:31:04,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:31:04,306 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 6 treesize of output 5 [2021-12-21 15:31:04,479 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 15:31:04,588 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-21 15:31:04,588 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 15:31:04,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948790500] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:31:04,588 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 15:31:04,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [12] total 18 [2021-12-21 15:31:04,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381282927] [2021-12-21 15:31:04,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:31:04,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 15:31:04,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:31:04,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 15:31:04,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-12-21 15:31:04,590 INFO L87 Difference]: Start difference. First operand 321 states and 395 transitions. Second operand has 10 states, 10 states have (on average 7.2) internal successors, (72), 9 states have internal predecessors, (72), 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 15:31:04,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:31:04,961 INFO L93 Difference]: Finished difference Result 566 states and 719 transitions. [2021-12-21 15:31:04,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 15:31:04,961 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.2) internal successors, (72), 9 states have internal predecessors, (72), 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 131 [2021-12-21 15:31:04,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:31:04,963 INFO L225 Difference]: With dead ends: 566 [2021-12-21 15:31:04,963 INFO L226 Difference]: Without dead ends: 368 [2021-12-21 15:31:04,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 151 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-12-21 15:31:04,964 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 123 mSDsluCounter, 941 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 1128 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 15:31:04,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 1128 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 279 Invalid, 0 Unknown, 56 Unchecked, 0.2s Time] [2021-12-21 15:31:04,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-12-21 15:31:04,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 327. [2021-12-21 15:31:04,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 250 states have (on average 1.136) internal successors, (284), 256 states have internal predecessors, (284), 48 states have call successors, (48), 24 states have call predecessors, (48), 28 states have return successors, (72), 46 states have call predecessors, (72), 47 states have call successors, (72) [2021-12-21 15:31:04,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 404 transitions. [2021-12-21 15:31:04,977 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 404 transitions. Word has length 131 [2021-12-21 15:31:04,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:31:04,977 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 404 transitions. [2021-12-21 15:31:04,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.2) internal successors, (72), 9 states have internal predecessors, (72), 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 15:31:04,977 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 404 transitions. [2021-12-21 15:31:04,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-12-21 15:31:04,978 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:31:04,978 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 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 15:31:05,004 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 15:31:05,191 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,SelfDestructingSolverStorable15 [2021-12-21 15:31:05,191 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:31:05,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:31:05,192 INFO L85 PathProgramCache]: Analyzing trace with hash 182726801, now seen corresponding path program 1 times [2021-12-21 15:31:05,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:31:05,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239291494] [2021-12-21 15:31:05,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:31:05,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:31:05,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:05,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 15:31:05,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:05,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 15:31:05,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:05,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 15:31:05,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:05,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:31:05,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:05,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-21 15:31:05,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:05,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 15:31:05,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:05,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-21 15:31:05,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:05,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-21 15:31:05,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:05,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-21 15:31:05,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:05,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-21 15:31:05,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:05,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-21 15:31:05,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:05,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-21 15:31:05,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:05,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-21 15:31:05,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:05,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-21 15:31:05,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:05,537 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 44 proven. 8 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-21 15:31:05,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:31:05,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239291494] [2021-12-21 15:31:05,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239291494] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:31:05,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827023006] [2021-12-21 15:31:05,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:31:05,538 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:31:05,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:31:05,539 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 15:31:05,540 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 15:31:05,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:05,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 2761 conjuncts, 90 conjunts are in the unsatisfiable core [2021-12-21 15:31:05,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:31:06,058 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 13 treesize of output 9 [2021-12-21 15:31:06,259 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-21 15:31:06,259 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 23 [2021-12-21 15:31:06,264 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-12-21 15:31:06,308 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-21 15:31:06,309 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 27 [2021-12-21 15:31:06,318 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 6 treesize of output 5 [2021-12-21 15:31:06,527 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 9 treesize of output 3 [2021-12-21 15:31:06,726 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-21 15:31:06,726 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 24 [2021-12-21 15:31:06,731 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-12-21 15:31:07,295 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-21 15:31:07,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:31:07,777 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 44 proven. 10 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-21 15:31:07,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827023006] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:31:07,778 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:31:07,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 26, 9] total 40 [2021-12-21 15:31:07,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028974166] [2021-12-21 15:31:07,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:31:07,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-21 15:31:07,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:31:07,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-21 15:31:07,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1421, Unknown=0, NotChecked=0, Total=1560 [2021-12-21 15:31:07,780 INFO L87 Difference]: Start difference. First operand 327 states and 404 transitions. Second operand has 40 states, 38 states have (on average 4.552631578947368) internal successors, (173), 37 states have internal predecessors, (173), 12 states have call successors, (34), 6 states have call predecessors, (34), 10 states have return successors, (31), 11 states have call predecessors, (31), 11 states have call successors, (31) [2021-12-21 15:31:11,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:31:11,057 INFO L93 Difference]: Finished difference Result 583 states and 746 transitions. [2021-12-21 15:31:11,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-12-21 15:31:11,057 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 38 states have (on average 4.552631578947368) internal successors, (173), 37 states have internal predecessors, (173), 12 states have call successors, (34), 6 states have call predecessors, (34), 10 states have return successors, (31), 11 states have call predecessors, (31), 11 states have call successors, (31) Word has length 131 [2021-12-21 15:31:11,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:31:11,059 INFO L225 Difference]: With dead ends: 583 [2021-12-21 15:31:11,059 INFO L226 Difference]: Without dead ends: 447 [2021-12-21 15:31:11,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 269 SyntacticMatches, 12 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2310 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=799, Invalid=7573, Unknown=0, NotChecked=0, Total=8372 [2021-12-21 15:31:11,062 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 461 mSDsluCounter, 1701 mSDsCounter, 0 mSdLazyCounter, 2753 mSolverCounterSat, 305 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 1886 SdHoareTripleChecker+Invalid, 4067 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 305 IncrementalHoareTripleChecker+Valid, 2753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1009 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-21 15:31:11,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [487 Valid, 1886 Invalid, 4067 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [305 Valid, 2753 Invalid, 0 Unknown, 1009 Unchecked, 1.7s Time] [2021-12-21 15:31:11,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-12-21 15:31:11,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 373. [2021-12-21 15:31:11,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 287 states have (on average 1.1114982578397212) internal successors, (319), 296 states have internal predecessors, (319), 52 states have call successors, (52), 26 states have call predecessors, (52), 33 states have return successors, (89), 50 states have call predecessors, (89), 51 states have call successors, (89) [2021-12-21 15:31:11,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 460 transitions. [2021-12-21 15:31:11,079 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 460 transitions. Word has length 131 [2021-12-21 15:31:11,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:31:11,080 INFO L470 AbstractCegarLoop]: Abstraction has 373 states and 460 transitions. [2021-12-21 15:31:11,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 38 states have (on average 4.552631578947368) internal successors, (173), 37 states have internal predecessors, (173), 12 states have call successors, (34), 6 states have call predecessors, (34), 10 states have return successors, (31), 11 states have call predecessors, (31), 11 states have call successors, (31) [2021-12-21 15:31:11,080 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 460 transitions. [2021-12-21 15:31:11,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-12-21 15:31:11,082 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:31:11,082 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 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 15:31:11,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-21 15:31:11,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:31:11,295 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:31:11,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:31:11,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1135268472, now seen corresponding path program 1 times [2021-12-21 15:31:11,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:31:11,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760812116] [2021-12-21 15:31:11,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:31:11,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:31:11,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:11,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 15:31:11,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:11,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 15:31:11,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:11,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 15:31:11,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:11,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:31:11,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:11,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-21 15:31:11,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:11,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 15:31:11,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:11,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-21 15:31:11,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:11,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-21 15:31:11,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:11,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-21 15:31:11,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:11,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-21 15:31:11,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:11,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-21 15:31:11,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:11,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-21 15:31:11,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:11,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-21 15:31:11,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:11,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-21 15:31:11,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:11,703 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 46 proven. 8 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-21 15:31:11,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:31:11,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760812116] [2021-12-21 15:31:11,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760812116] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:31:11,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911289558] [2021-12-21 15:31:11,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:31:11,704 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:31:11,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:31:11,705 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 15:31:11,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-21 15:31:12,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:12,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 2771 conjuncts, 119 conjunts are in the unsatisfiable core [2021-12-21 15:31:12,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:31:12,174 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 15:31:12,352 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-21 15:31:12,353 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-12-21 15:31:12,380 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 13 treesize of output 9 [2021-12-21 15:31:12,667 INFO L353 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2021-12-21 15:31:12,667 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 28 [2021-12-21 15:31:12,721 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 27 treesize of output 27 [2021-12-21 15:31:14,807 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 27 treesize of output 27 [2021-12-21 15:31:14,838 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-21 15:31:14,839 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 21 [2021-12-21 15:31:15,022 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-21 15:31:15,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 25 [2021-12-21 15:31:16,044 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 41 proven. 109 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-21 15:31:16,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:31:17,202 INFO L353 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-12-21 15:31:17,203 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 24 treesize of output 19 [2021-12-21 15:31:17,374 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 46 proven. 10 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-21 15:31:17,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911289558] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:31:17,374 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:31:17,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 36, 17] total 59 [2021-12-21 15:31:17,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317522928] [2021-12-21 15:31:17,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:31:17,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-12-21 15:31:17,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:31:17,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-12-21 15:31:17,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=3232, Unknown=1, NotChecked=0, Total=3422 [2021-12-21 15:31:17,377 INFO L87 Difference]: Start difference. First operand 373 states and 460 transitions. Second operand has 59 states, 55 states have (on average 3.5090909090909093) internal successors, (193), 53 states have internal predecessors, (193), 15 states have call successors, (36), 10 states have call predecessors, (36), 14 states have return successors, (32), 14 states have call predecessors, (32), 12 states have call successors, (32) [2021-12-21 15:31:22,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:31:22,180 INFO L93 Difference]: Finished difference Result 543 states and 673 transitions. [2021-12-21 15:31:22,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-12-21 15:31:22,181 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 55 states have (on average 3.5090909090909093) internal successors, (193), 53 states have internal predecessors, (193), 15 states have call successors, (36), 10 states have call predecessors, (36), 14 states have return successors, (32), 14 states have call predecessors, (32), 12 states have call successors, (32) Word has length 133 [2021-12-21 15:31:22,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:31:22,183 INFO L225 Difference]: With dead ends: 543 [2021-12-21 15:31:22,183 INFO L226 Difference]: Without dead ends: 405 [2021-12-21 15:31:22,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 251 SyntacticMatches, 12 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4990 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=960, Invalid=16861, Unknown=1, NotChecked=0, Total=17822 [2021-12-21 15:31:22,187 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 387 mSDsluCounter, 2239 mSDsCounter, 0 mSdLazyCounter, 3721 mSolverCounterSat, 390 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 2406 SdHoareTripleChecker+Invalid, 5447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 390 IncrementalHoareTripleChecker+Valid, 3721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1336 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-21 15:31:22,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 2406 Invalid, 5447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [390 Valid, 3721 Invalid, 0 Unknown, 1336 Unchecked, 2.0s Time] [2021-12-21 15:31:22,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-12-21 15:31:22,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 356. [2021-12-21 15:31:22,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 269 states have (on average 1.1078066914498141) internal successors, (298), 276 states have internal predecessors, (298), 52 states have call successors, (52), 29 states have call predecessors, (52), 34 states have return successors, (82), 50 states have call predecessors, (82), 51 states have call successors, (82) [2021-12-21 15:31:22,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 432 transitions. [2021-12-21 15:31:22,202 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 432 transitions. Word has length 133 [2021-12-21 15:31:22,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:31:22,202 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 432 transitions. [2021-12-21 15:31:22,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 55 states have (on average 3.5090909090909093) internal successors, (193), 53 states have internal predecessors, (193), 15 states have call successors, (36), 10 states have call predecessors, (36), 14 states have return successors, (32), 14 states have call predecessors, (32), 12 states have call successors, (32) [2021-12-21 15:31:22,203 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 432 transitions. [2021-12-21 15:31:22,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-21 15:31:22,204 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:31:22,204 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:31:22,225 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-21 15:31:22,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-21 15:31:22,419 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:31:22,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:31:22,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1935170269, now seen corresponding path program 1 times [2021-12-21 15:31:22,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:31:22,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405850427] [2021-12-21 15:31:22,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:31:22,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:31:22,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:22,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 15:31:22,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:22,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 15:31:22,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:22,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 15:31:22,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:22,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:31:22,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:22,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-21 15:31:22,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:22,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 15:31:22,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:22,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-21 15:31:22,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:22,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-21 15:31:22,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:22,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-21 15:31:22,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:22,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-21 15:31:22,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:22,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-21 15:31:22,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:22,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-21 15:31:22,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:22,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-21 15:31:22,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:22,682 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 22 proven. 8 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2021-12-21 15:31:22,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:31:22,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405850427] [2021-12-21 15:31:22,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405850427] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:31:22,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265708347] [2021-12-21 15:31:22,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:31:22,683 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:31:22,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:31:22,684 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 15:31:22,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-21 15:31:23,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:23,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 2730 conjuncts, 75 conjunts are in the unsatisfiable core [2021-12-21 15:31:23,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:31:23,167 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 15:31:23,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 15:31:23,398 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 22 treesize of output 21 [2021-12-21 15:31:23,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 15:31:23,679 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 22 treesize of output 21 [2021-12-21 15:31:24,245 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 64 proven. 43 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-21 15:31:24,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:31:26,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265708347] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:31:26,583 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 15:31:26,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 18] total 26 [2021-12-21 15:31:26,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365536632] [2021-12-21 15:31:26,584 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 15:31:26,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-21 15:31:26,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:31:26,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-21 15:31:26,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=959, Unknown=1, NotChecked=0, Total=1056 [2021-12-21 15:31:26,585 INFO L87 Difference]: Start difference. First operand 356 states and 432 transitions. Second operand has 26 states, 23 states have (on average 5.739130434782608) internal successors, (132), 23 states have internal predecessors, (132), 10 states have call successors, (28), 5 states have call predecessors, (28), 6 states have return successors, (25), 8 states have call predecessors, (25), 9 states have call successors, (25) [2021-12-21 15:31:28,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:31:28,628 INFO L93 Difference]: Finished difference Result 662 states and 818 transitions. [2021-12-21 15:31:28,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-21 15:31:28,629 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 5.739130434782608) internal successors, (132), 23 states have internal predecessors, (132), 10 states have call successors, (28), 5 states have call predecessors, (28), 6 states have return successors, (25), 8 states have call predecessors, (25), 9 states have call successors, (25) Word has length 134 [2021-12-21 15:31:28,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:31:28,631 INFO L225 Difference]: With dead ends: 662 [2021-12-21 15:31:28,631 INFO L226 Difference]: Without dead ends: 387 [2021-12-21 15:31:28,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 183 SyntacticMatches, 16 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1227 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=573, Invalid=4538, Unknown=1, NotChecked=0, Total=5112 [2021-12-21 15:31:28,633 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 199 mSDsluCounter, 1692 mSDsCounter, 0 mSdLazyCounter, 1884 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 1890 SdHoareTripleChecker+Invalid, 2533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 578 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-21 15:31:28,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 1890 Invalid, 2533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1884 Invalid, 0 Unknown, 578 Unchecked, 0.9s Time] [2021-12-21 15:31:28,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-12-21 15:31:28,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 334. [2021-12-21 15:31:28,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 248 states have (on average 1.1048387096774193) internal successors, (274), 252 states have internal predecessors, (274), 53 states have call successors, (53), 31 states have call predecessors, (53), 32 states have return successors, (71), 50 states have call predecessors, (71), 52 states have call successors, (71) [2021-12-21 15:31:28,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 398 transitions. [2021-12-21 15:31:28,655 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 398 transitions. Word has length 134 [2021-12-21 15:31:28,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:31:28,655 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 398 transitions. [2021-12-21 15:31:28,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 5.739130434782608) internal successors, (132), 23 states have internal predecessors, (132), 10 states have call successors, (28), 5 states have call predecessors, (28), 6 states have return successors, (25), 8 states have call predecessors, (25), 9 states have call successors, (25) [2021-12-21 15:31:28,655 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 398 transitions. [2021-12-21 15:31:28,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-21 15:31:28,660 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:31:28,660 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:31:28,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-21 15:31:28,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:31:28,883 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:31:28,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:31:28,883 INFO L85 PathProgramCache]: Analyzing trace with hash -2001620082, now seen corresponding path program 1 times [2021-12-21 15:31:28,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:31:28,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282533813] [2021-12-21 15:31:28,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:31:28,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:31:29,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:29,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 15:31:29,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:29,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 15:31:29,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:29,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 15:31:29,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:29,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:31:29,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:29,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-21 15:31:29,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:29,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 15:31:29,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:29,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-21 15:31:29,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:29,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-21 15:31:29,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:29,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-21 15:31:29,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:29,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-21 15:31:29,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:29,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-21 15:31:29,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:29,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-21 15:31:29,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:29,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-21 15:31:29,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:29,249 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 60 proven. 7 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2021-12-21 15:31:29,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:31:29,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282533813] [2021-12-21 15:31:29,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282533813] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:31:29,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145294061] [2021-12-21 15:31:29,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:31:29,250 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:31:29,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:31:29,251 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 15:31:29,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-21 15:31:29,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:31:29,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 2729 conjuncts, 87 conjunts are in the unsatisfiable core [2021-12-21 15:31:29,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:31:29,775 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 6 treesize of output 5 [2021-12-21 15:31:29,957 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-21 15:31:29,958 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 30 [2021-12-21 15:31:30,070 INFO L353 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-12-21 15:31:30,072 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-12-21 15:31:30,754 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 79 proven. 34 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-21 15:31:30,754 INFO L328 TraceCheckSpWp]: Computing backward predicates...