/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/loop-acceleration/underapprox_2-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:34:27,298 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:34:27,302 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:34:27,361 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:34:27,362 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:34:27,363 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:34:27,365 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:34:27,367 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:34:27,370 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:34:27,371 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:34:27,372 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:34:27,374 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:34:27,374 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:34:27,376 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:34:27,377 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:34:27,378 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:34:27,397 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:34:27,399 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:34:27,401 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:34:27,404 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:34:27,406 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:34:27,408 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:34:27,409 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:34:27,410 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:34:27,414 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:34:27,414 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:34:27,415 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:34:27,416 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:34:27,417 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:34:27,418 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:34:27,419 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:34:27,420 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:34:27,421 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:34:27,422 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:34:27,423 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:34:27,424 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:34:27,425 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:34:27,425 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:34:27,425 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:34:27,427 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:34:27,427 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:34:27,429 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 01:34:27,466 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:34:27,466 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:34:27,469 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:34:27,469 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:34:27,469 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:34:27,470 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:34:27,470 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:34:27,472 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:34:27,472 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:34:27,472 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:34:27,473 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:34:27,474 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:34:27,474 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:34:27,474 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:34:27,474 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:34:27,474 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:34:27,475 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:34:27,475 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:34:27,475 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:34:27,476 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:34:27,476 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:34:27,476 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:34:27,477 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:34:27,477 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:34:27,477 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:34:27,477 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:34:27,478 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:34:27,478 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:34:27,478 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:34:27,478 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-2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:34:27,924 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:34:27,957 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:34:27,961 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:34:27,962 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:34:27,963 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:34:27,965 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/underapprox_2-1.c [2020-10-27 01:34:28,049 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/76b341751/b785c96e31634ddb92c982af7b0fada0/FLAG62f3c4529 [2020-10-27 01:34:28,637 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:34:28,638 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/underapprox_2-1.c [2020-10-27 01:34:28,644 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/76b341751/b785c96e31634ddb92c982af7b0fada0/FLAG62f3c4529 [2020-10-27 01:34:29,030 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/76b341751/b785c96e31634ddb92c982af7b0fada0 [2020-10-27 01:34:29,034 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:34:29,044 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:34:29,046 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:34:29,047 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:34:29,051 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:34:29,051 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:34:29" (1/1) ... [2020-10-27 01:34:29,056 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e3200ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:34:29, skipping insertion in model container [2020-10-27 01:34:29,056 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:34:29" (1/1) ... [2020-10-27 01:34:29,065 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:34:29,085 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:34:29,268 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:34:29,279 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:34:29,296 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:34:29,314 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:34:29,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:34:29 WrapperNode [2020-10-27 01:34:29,315 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:34:29,317 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:34:29,317 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:34:29,317 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:34:29,332 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:34:29" (1/1) ... [2020-10-27 01:34:29,333 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:34:29" (1/1) ... [2020-10-27 01:34:29,342 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:34:29" (1/1) ... [2020-10-27 01:34:29,343 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:34:29" (1/1) ... [2020-10-27 01:34:29,349 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:34:29" (1/1) ... [2020-10-27 01:34:29,354 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:34:29" (1/1) ... [2020-10-27 01:34:29,355 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:34:29" (1/1) ... [2020-10-27 01:34:29,357 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:34:29,358 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:34:29,358 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:34:29,359 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:34:29,359 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:34:29" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:34:29,452 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:34:29,453 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:34:29,453 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:34:29,454 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 01:34:29,454 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:34:29,454 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:34:29,455 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:34:29,455 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:34:29,455 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:34:29,455 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 01:34:29,456 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:34:29,456 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:34:29,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:34:29,457 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:34:29,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:34:29,458 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:34:29,458 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:34:29,984 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:34:29,984 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 01:34:29,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:34:29 BoogieIcfgContainer [2020-10-27 01:34:29,987 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:34:29,992 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:34:29,992 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:34:29,995 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:34:29,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:34:29" (1/3) ... [2020-10-27 01:34:29,997 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4df1688d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:34:29, skipping insertion in model container [2020-10-27 01:34:29,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:34:29" (2/3) ... [2020-10-27 01:34:29,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4df1688d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:34:29, skipping insertion in model container [2020-10-27 01:34:29,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:34:29" (3/3) ... [2020-10-27 01:34:30,001 INFO L111 eAbstractionObserver]: Analyzing ICFG underapprox_2-1.c [2020-10-27 01:34:30,014 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:34:30,023 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:34:30,038 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:34:30,080 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:34:30,080 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:34:30,081 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:34:30,081 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:34:30,081 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:34:30,081 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:34:30,081 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:34:30,081 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:34:30,107 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-10-27 01:34:30,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-27 01:34:30,121 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:30,123 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:30,123 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:30,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:30,132 INFO L82 PathProgramCache]: Analyzing trace with hash 783588435, now seen corresponding path program 1 times [2020-10-27 01:34:30,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:30,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1152632010] [2020-10-27 01:34:30,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:30,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:30,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:30,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:30,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:30,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 01:34:30,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:34:30,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 373 [2020-10-27 01:34:30,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:30,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:34:30,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:30,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:34:30,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 01:34:30,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:30,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:30,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:30,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:30,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:30,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:30,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 01:34:30,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:30,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:30,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:30,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:30,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:30,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:30,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1152632010] [2020-10-27 01:34:30,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:34:30,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 01:34:30,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270107284] [2020-10-27 01:34:30,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:34:30,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:31,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:34:31,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:34:31,017 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 6 states. [2020-10-27 01:34:31,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:31,291 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-10-27 01:34:31,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:34:31,294 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-10-27 01:34:31,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:31,301 INFO L225 Difference]: With dead ends: 35 [2020-10-27 01:34:31,302 INFO L226 Difference]: Without dead ends: 14 [2020-10-27 01:34:31,305 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:34:31,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-27 01:34:31,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-27 01:34:31,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-27 01:34:31,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-10-27 01:34:31,347 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-10-27 01:34:31,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:31,348 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-10-27 01:34:31,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:34:31,348 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-10-27 01:34:31,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-27 01:34:31,349 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:31,349 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:31,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:34:31,350 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:31,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:31,350 INFO L82 PathProgramCache]: Analyzing trace with hash 396678398, now seen corresponding path program 1 times [2020-10-27 01:34:31,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:31,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1415308781] [2020-10-27 01:34:31,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:31,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:31,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:31,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:31,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:31,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 01:34:31,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:34:31,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 381 [2020-10-27 01:34:31,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:31,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:34:31,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:31,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:34:31,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:34:31,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:31,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:31,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:31,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:31,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:31,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:31,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 01:34:31,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:31,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:31,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:31,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:31,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:31,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:31,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1415308781] [2020-10-27 01:34:31,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:31,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:34:31,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453660134] [2020-10-27 01:34:31,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:34:31,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:31,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:34:31,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:34:31,957 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 7 states. [2020-10-27 01:34:32,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:32,166 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-10-27 01:34:32,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:34:32,167 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-10-27 01:34:32,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:32,168 INFO L225 Difference]: With dead ends: 21 [2020-10-27 01:34:32,168 INFO L226 Difference]: Without dead ends: 15 [2020-10-27 01:34:32,170 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:34:32,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-27 01:34:32,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-27 01:34:32,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-27 01:34:32,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-10-27 01:34:32,177 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2020-10-27 01:34:32,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:32,177 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-10-27 01:34:32,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:34:32,177 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-10-27 01:34:32,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-27 01:34:32,178 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:32,178 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:32,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:34:32,179 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:32,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:32,179 INFO L82 PathProgramCache]: Analyzing trace with hash 542416567, now seen corresponding path program 2 times [2020-10-27 01:34:32,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:32,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [613984577] [2020-10-27 01:34:32,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:32,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:32,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:32,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:32,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:32,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 01:34:32,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:34:32,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 248 [2020-10-27 01:34:32,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:32,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:34:32,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:32,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 01:34:32,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:32,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:32,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:32,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:32,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:32,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:32,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:32,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:34:32,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:32,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:32,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:32,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:32,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:32,637 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:32,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [613984577] [2020-10-27 01:34:32,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:32,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:34:32,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514197876] [2020-10-27 01:34:32,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:34:32,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:32,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:34:32,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:34:32,640 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2020-10-27 01:34:32,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:32,922 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-10-27 01:34:32,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:34:32,923 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2020-10-27 01:34:32,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:32,924 INFO L225 Difference]: With dead ends: 22 [2020-10-27 01:34:32,924 INFO L226 Difference]: Without dead ends: 16 [2020-10-27 01:34:32,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:34:32,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-27 01:34:32,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-27 01:34:32,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-27 01:34:32,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-10-27 01:34:32,931 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2020-10-27 01:34:32,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:32,931 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-10-27 01:34:32,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:34:32,931 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-10-27 01:34:32,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-27 01:34:32,932 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:32,932 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:32,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:34:32,933 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:32,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:32,933 INFO L82 PathProgramCache]: Analyzing trace with hash 765332510, now seen corresponding path program 3 times [2020-10-27 01:34:32,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:32,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [109610658] [2020-10-27 01:34:32,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:32,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:32,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:32,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:33,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:33,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 01:34:33,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:34:33,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 297 [2020-10-27 01:34:33,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:33,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:34:33,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:33,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:34:33,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:33,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:33,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:33,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:33,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:33,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:33,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:33,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:34:33,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:33,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:33,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:33,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:33,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:33,451 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:33,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [109610658] [2020-10-27 01:34:33,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:33,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:34:33,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121956922] [2020-10-27 01:34:33,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:34:33,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:33,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:34:33,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:34:33,455 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 9 states. [2020-10-27 01:34:33,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:33,818 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2020-10-27 01:34:33,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:34:33,819 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2020-10-27 01:34:33,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:33,820 INFO L225 Difference]: With dead ends: 23 [2020-10-27 01:34:33,820 INFO L226 Difference]: Without dead ends: 17 [2020-10-27 01:34:33,821 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:34:33,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-27 01:34:33,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-27 01:34:33,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-27 01:34:33,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-10-27 01:34:33,827 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2020-10-27 01:34:33,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:33,827 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-10-27 01:34:33,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:34:33,828 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-10-27 01:34:33,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 01:34:33,828 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:33,829 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:33,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:34:33,829 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:33,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:33,830 INFO L82 PathProgramCache]: Analyzing trace with hash -914207849, now seen corresponding path program 4 times [2020-10-27 01:34:33,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:33,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [80279922] [2020-10-27 01:34:33,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:33,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:33,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:33,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:34,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:34,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 01:34:34,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:34:34,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 314 [2020-10-27 01:34:34,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:34,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:34:34,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:34,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:34:34,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:34,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:34,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:34,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:34,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:34,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:34,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:34,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:34:34,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:34,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:34,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:34,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:34,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:34,337 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:34,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [80279922] [2020-10-27 01:34:34,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:34,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:34:34,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532036346] [2020-10-27 01:34:34,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:34:34,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:34,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:34:34,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:34:34,340 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 8 states. [2020-10-27 01:34:34,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:34,709 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-10-27 01:34:34,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:34:34,710 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-10-27 01:34:34,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:34,711 INFO L225 Difference]: With dead ends: 24 [2020-10-27 01:34:34,711 INFO L226 Difference]: Without dead ends: 18 [2020-10-27 01:34:34,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:34:34,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-27 01:34:34,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-27 01:34:34,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-27 01:34:34,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-10-27 01:34:34,718 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2020-10-27 01:34:34,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:34,718 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-10-27 01:34:34,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:34:34,719 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-10-27 01:34:34,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 01:34:34,719 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:34,719 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:34,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:34:34,720 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:34,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:34,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1440351426, now seen corresponding path program 5 times [2020-10-27 01:34:34,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:34,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [561951549] [2020-10-27 01:34:34,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:34,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:34,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:34,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:35,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:35,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 01:34:35,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:34:35,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 302 [2020-10-27 01:34:35,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:35,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:34:35,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:35,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:34:35,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:35,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:35,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:35,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:35,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:35,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:35,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:35,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:34:35,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:35,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:35,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:35,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:35,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:35,233 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:35,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [561951549] [2020-10-27 01:34:35,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:35,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:34:35,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429677657] [2020-10-27 01:34:35,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:34:35,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:35,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:34:35,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:34:35,236 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 9 states. [2020-10-27 01:34:35,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:35,691 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2020-10-27 01:34:35,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:34:35,692 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2020-10-27 01:34:35,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:35,693 INFO L225 Difference]: With dead ends: 25 [2020-10-27 01:34:35,693 INFO L226 Difference]: Without dead ends: 19 [2020-10-27 01:34:35,693 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:34:35,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-27 01:34:35,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-27 01:34:35,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-27 01:34:35,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-10-27 01:34:35,700 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2020-10-27 01:34:35,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:35,700 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-10-27 01:34:35,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:34:35,700 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-10-27 01:34:35,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 01:34:35,701 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:35,701 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:35,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:34:35,701 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:35,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:35,702 INFO L82 PathProgramCache]: Analyzing trace with hash -570933129, now seen corresponding path program 6 times [2020-10-27 01:34:35,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:35,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [29127835] [2020-10-27 01:34:35,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:35,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-27 01:34:35,717 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-27 01:34:35,717 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-27 01:34:35,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 01:34:35,737 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 01:34:35 BoogieIcfgContainer [2020-10-27 01:34:35,737 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-27 01:34:35,740 INFO L168 Benchmark]: Toolchain (without parser) took 6700.64 ms. Allocated memory was 151.0 MB in the beginning and 184.5 MB in the end (delta: 33.6 MB). Free memory was 125.6 MB in the beginning and 84.5 MB in the end (delta: 41.2 MB). Peak memory consumption was 75.2 MB. Max. memory is 8.0 GB. [2020-10-27 01:34:35,741 INFO L168 Benchmark]: CDTParser took 1.56 ms. Allocated memory is still 151.0 MB. Free memory is still 122.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 01:34:35,742 INFO L168 Benchmark]: CACSL2BoogieTranslator took 269.36 ms. Allocated memory is still 151.0 MB. Free memory was 125.2 MB in the beginning and 116.1 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-27 01:34:35,742 INFO L168 Benchmark]: Boogie Preprocessor took 40.82 ms. Allocated memory is still 151.0 MB. Free memory was 116.1 MB in the beginning and 114.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-27 01:34:35,743 INFO L168 Benchmark]: RCFGBuilder took 629.37 ms. Allocated memory is still 151.0 MB. Free memory was 114.7 MB in the beginning and 102.3 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-10-27 01:34:35,744 INFO L168 Benchmark]: TraceAbstraction took 5745.73 ms. Allocated memory was 151.0 MB in the beginning and 184.5 MB in the end (delta: 33.6 MB). Free memory was 101.8 MB in the beginning and 84.5 MB in the end (delta: 17.3 MB). Peak memory consumption was 51.1 MB. Max. memory is 8.0 GB. [2020-10-27 01:34:35,748 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.56 ms. Allocated memory is still 151.0 MB. Free memory is still 122.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 269.36 ms. Allocated memory is still 151.0 MB. Free memory was 125.2 MB in the beginning and 116.1 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 40.82 ms. Allocated memory is still 151.0 MB. Free memory was 116.1 MB in the beginning and 114.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 629.37 ms. Allocated memory is still 151.0 MB. Free memory was 114.7 MB in the beginning and 102.3 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5745.73 ms. Allocated memory was 151.0 MB in the beginning and 184.5 MB in the end (delta: 33.6 MB). Free memory was 101.8 MB in the beginning and 84.5 MB in the end (delta: 17.3 MB). Peak memory consumption was 51.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L13] unsigned int x = 0; [L14] unsigned int y = 1; [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 [L16] COND FALSE !(x < 6) [L21] CALL __VERIFIER_assert(x != 6) [L6] COND TRUE !(cond) [L7] CALL reach_error() [L3] __assert_fail("0", "underapprox_2-1.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.6s, OverallIterations: 7, TraceHistogramMax: 6, AutomataDifference: 2.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 71 SDtfs, 40 SDslu, 147 SDs, 0 SdLazy, 237 SolverSat, 59 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 2.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.1s InterpolantComputationTime, 105 NumberOfCodeBlocks, 105 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 81 ConstructedInterpolants, 0 QuantifiedInterpolants, 6241 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 1 PerfectInterpolantSequences, 0/35 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...