/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=DEEPEST --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/array-crafted/bAnd5.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 14:03:28,258 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 14:03:28,261 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 14:03:28,310 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 14:03:28,311 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 14:03:28,312 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 14:03:28,314 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 14:03:28,316 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 14:03:28,318 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 14:03:28,320 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 14:03:28,321 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 14:03:28,322 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 14:03:28,323 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 14:03:28,324 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 14:03:28,325 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 14:03:28,327 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 14:03:28,328 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 14:03:28,329 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 14:03:28,348 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 14:03:28,354 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 14:03:28,357 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 14:03:28,359 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 14:03:28,360 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 14:03:28,361 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 14:03:28,372 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 14:03:28,374 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 14:03:28,375 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 14:03:28,376 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 14:03:28,376 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 14:03:28,379 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 14:03:28,380 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 14:03:28,381 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 14:03:28,382 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 14:03:28,385 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 14:03:28,386 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 14:03:28,387 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 14:03:28,388 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 14:03:28,388 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 14:03:28,389 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 14:03:28,390 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 14:03:28,391 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 14:03:28,392 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 14:03:28,446 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 14:03:28,447 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 14:03:28,451 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 14:03:28,452 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 14:03:28,452 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 14:03:28,452 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 14:03:28,453 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 14:03:28,453 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 14:03:28,453 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 14:03:28,453 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 14:03:28,454 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 14:03:28,455 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 14:03:28,455 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 14:03:28,455 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 14:03:28,455 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 14:03:28,455 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 14:03:28,456 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 14:03:28,456 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 14:03:28,456 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 14:03:28,457 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 14:03:28,457 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 14:03:28,457 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:03:28,457 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 14:03:28,457 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 14:03:28,458 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 14:03:28,458 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 14:03:28,458 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 14:03:28,458 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 14:03:28,458 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 14:03:28,459 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 14:03:28,873 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 14:03:28,902 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 14:03:28,906 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 14:03:28,908 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 14:03:28,908 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 14:03:28,911 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/bAnd5.i [2020-10-27 14:03:28,982 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dd54f60c0/c46851b8e83a4886af42c32094ca1ae3/FLAG21e509ace [2020-10-27 14:03:29,652 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 14:03:29,652 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-crafted/bAnd5.i [2020-10-27 14:03:29,661 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dd54f60c0/c46851b8e83a4886af42c32094ca1ae3/FLAG21e509ace [2020-10-27 14:03:30,035 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dd54f60c0/c46851b8e83a4886af42c32094ca1ae3 [2020-10-27 14:03:30,041 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 14:03:30,051 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 14:03:30,054 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 14:03:30,054 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 14:03:30,059 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 14:03:30,060 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:03:30" (1/1) ... [2020-10-27 14:03:30,065 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77b8a38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:03:30, skipping insertion in model container [2020-10-27 14:03:30,066 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:03:30" (1/1) ... [2020-10-27 14:03:30,076 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 14:03:30,103 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 14:03:30,385 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:03:30,398 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 14:03:30,448 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:03:30,468 INFO L208 MainTranslator]: Completed translation [2020-10-27 14:03:30,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:03:30 WrapperNode [2020-10-27 14:03:30,470 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 14:03:30,471 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 14:03:30,471 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 14:03:30,471 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 14:03:30,487 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:03:30" (1/1) ... [2020-10-27 14:03:30,489 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:03:30" (1/1) ... [2020-10-27 14:03:30,512 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:03:30" (1/1) ... [2020-10-27 14:03:30,513 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:03:30" (1/1) ... [2020-10-27 14:03:30,535 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:03:30" (1/1) ... [2020-10-27 14:03:30,543 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:03:30" (1/1) ... [2020-10-27 14:03:30,547 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:03:30" (1/1) ... [2020-10-27 14:03:30,557 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 14:03:30,558 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 14:03:30,558 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 14:03:30,559 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 14:03:30,560 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:03:30" (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 14:03:30,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 14:03:30,636 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 14:03:30,636 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 14:03:30,636 INFO L138 BoogieDeclarations]: Found implementation of procedure bAnd [2020-10-27 14:03:30,636 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 14:03:30,636 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 14:03:30,637 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 14:03:30,637 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 14:03:30,637 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 14:03:30,637 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 14:03:30,637 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 14:03:30,637 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 14:03:30,638 INFO L130 BoogieDeclarations]: Found specification of procedure bAnd [2020-10-27 14:03:30,638 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 14:03:30,638 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 14:03:30,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 14:03:30,638 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 14:03:30,638 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 14:03:30,639 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 14:03:30,639 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 14:03:31,063 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 14:03:31,063 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-27 14:03:31,065 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:03:31 BoogieIcfgContainer [2020-10-27 14:03:31,065 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 14:03:31,067 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 14:03:31,067 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 14:03:31,071 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 14:03:31,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:03:30" (1/3) ... [2020-10-27 14:03:31,072 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65b45a68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:03:31, skipping insertion in model container [2020-10-27 14:03:31,072 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:03:30" (2/3) ... [2020-10-27 14:03:31,073 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65b45a68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:03:31, skipping insertion in model container [2020-10-27 14:03:31,073 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:03:31" (3/3) ... [2020-10-27 14:03:31,075 INFO L111 eAbstractionObserver]: Analyzing ICFG bAnd5.i [2020-10-27 14:03:31,087 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 14:03:31,093 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 14:03:31,107 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 14:03:31,134 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 14:03:31,135 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 14:03:31,135 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 14:03:31,135 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 14:03:31,135 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 14:03:31,135 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 14:03:31,135 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 14:03:31,136 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 14:03:31,154 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-10-27 14:03:31,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 14:03:31,161 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:03:31,162 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-10-27 14:03:31,163 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:03:31,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:03:31,170 INFO L82 PathProgramCache]: Analyzing trace with hash 540822586, now seen corresponding path program 1 times [2020-10-27 14:03:31,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:03:31,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [847752884] [2020-10-27 14:03:31,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:03:31,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:03:31,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:03:31,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:03:31,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:03:31,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:03:31,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:03:34,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:03:34,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 14:03:34,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:03:34,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2889 [2020-10-27 14:03:34,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:03:34,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 14:03:34,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:03:34,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 14:03:34,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 14:03:34,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:03:34,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:03:34,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:03:34,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:03:34,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:03:34,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:03:34,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 14:03:34,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:03:34,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:03:34,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:03:34,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:03:34,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:03:34,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 14:03:34,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:03:34,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:03:34,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:03:34,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:03:34,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 14:03:34,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:03:34,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-27 14:03:34,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:03:34,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 14:03:34,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 14:03:34,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:03:34,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:03:34,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-27 14:03:34,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:03:34,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:03:34,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:03:34,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 14:03:34,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:03:34,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 14:03:34,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:03:34,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 14:03:34,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 14:03:34,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:03:34,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:03:34,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-27 14:03:34,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:03:34,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:03:34,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:03:34,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 14:03:34,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:03:34,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 14:03:34,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:03:34,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:03:34,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-27 14:03:34,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:03:34,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:03:34,529 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-27 14:03:34,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [847752884] [2020-10-27 14:03:34,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:03:34,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 14:03:34,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583210100] [2020-10-27 14:03:34,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 14:03:34,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:03:34,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 14:03:34,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:03:34,560 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 6 states. [2020-10-27 14:03:34,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:03:34,946 INFO L93 Difference]: Finished difference Result 70 states and 92 transitions. [2020-10-27 14:03:34,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 14:03:34,948 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 35 [2020-10-27 14:03:34,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:03:34,958 INFO L225 Difference]: With dead ends: 70 [2020-10-27 14:03:34,958 INFO L226 Difference]: Without dead ends: 31 [2020-10-27 14:03:34,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:03:34,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-27 14:03:35,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-10-27 14:03:35,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-27 14:03:35,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-10-27 14:03:35,020 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 35 [2020-10-27 14:03:35,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:03:35,021 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-10-27 14:03:35,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 14:03:35,021 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-10-27 14:03:35,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 14:03:35,023 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:03:35,024 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2020-10-27 14:03:35,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 14:03:35,024 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:03:35,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:03:35,025 INFO L82 PathProgramCache]: Analyzing trace with hash -756220520, now seen corresponding path program 1 times [2020-10-27 14:03:35,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:03:35,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1103318236] [2020-10-27 14:03:35,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:03:35,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:03:35,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:03:35,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:03:35,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:03:35,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:03:35,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:03:36,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:03:36,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 14:03:36,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:03:36,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1384 [2020-10-27 14:03:36,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:03:36,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 14:03:36,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-27 14:03:36,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 14:03:36,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:03:36,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:03:36,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:03:36,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:03:36,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:03:36,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:03:36,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:03:36,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:03:36,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:03:36,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:03:36,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:03:36,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:03:36,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:03:36,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 14:03:36,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:03:36,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:03:36,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:03:36,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-27 14:03:36,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:03:36,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:03:36,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:03:36,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:03:36,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:03:36,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:03:36,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:03:36,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-27 14:03:36,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:03:36,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:03:36,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:03:36,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-27 14:03:36,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:03:36,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:03:36,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:03:36,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:03:36,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:03:36,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:03:36,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:03:36,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-27 14:03:36,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:03:36,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:03:36,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:03:36,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-27 14:03:36,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:03:36,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 14:03:36,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:03:36,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 14:03:36,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 14:03:36,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 14:03:36,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:03:36,592 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-27 14:03:36,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1103318236] [2020-10-27 14:03:36,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:03:36,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 14:03:36,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014971228] [2020-10-27 14:03:36,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 14:03:36,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:03:36,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 14:03:36,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:03:36,600 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 7 states. [2020-10-27 14:03:36,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:03:36,917 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2020-10-27 14:03:36,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 14:03:36,918 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 41 [2020-10-27 14:03:36,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:03:36,919 INFO L225 Difference]: With dead ends: 47 [2020-10-27 14:03:36,920 INFO L226 Difference]: Without dead ends: 32 [2020-10-27 14:03:36,921 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:03:36,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-27 14:03:36,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-10-27 14:03:36,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-27 14:03:36,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-10-27 14:03:36,930 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 41 [2020-10-27 14:03:36,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:03:36,932 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-10-27 14:03:36,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 14:03:36,932 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-10-27 14:03:36,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 14:03:36,933 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:03:36,934 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2020-10-27 14:03:36,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 14:03:36,934 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:03:36,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:03:36,935 INFO L82 PathProgramCache]: Analyzing trace with hash 924681910, now seen corresponding path program 1 times [2020-10-27 14:03:36,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:03:36,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [493757764] [2020-10-27 14:03:36,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:03:36,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:03:36,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:03:37,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:03:37,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 14:03:37,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:03:37,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-10-27 14:03:37,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:03:37,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:03:37,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:03:37,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 14:03:37,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:03:37,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:03:37,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:03:37,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:03:37,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:03:37,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:03:37,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:03:37,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:03:37,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:03:37,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:03:37,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:03:37,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:03:37,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:03:37,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 14:03:37,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:03:37,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:03:37,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:03:37,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-27 14:03:37,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:03:37,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 14:03:37,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:03:37,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:03:37,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-10-27 14:03:37,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:03:37,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:03:37,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-27 14:03:37,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:03:37,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:03:37,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:03:37,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-27 14:03:37,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:03:37,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:03:37,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:03:37,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:03:37,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-10-27 14:03:37,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:03:37,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:03:37,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-27 14:03:37,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:03:37,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:03:37,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:03:37,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-27 14:03:37,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:03:37,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 14:03:37,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:03:37,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:03:37,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-10-27 14:03:37,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:03:37,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:03:37,138 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-10-27 14:03:37,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [493757764] [2020-10-27 14:03:37,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:03:37,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 14:03:37,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667037733] [2020-10-27 14:03:37,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 14:03:37,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:03:37,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 14:03:37,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:03:37,144 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 4 states. [2020-10-27 14:03:37,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:03:37,267 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2020-10-27 14:03:37,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 14:03:37,268 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2020-10-27 14:03:37,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:03:37,269 INFO L225 Difference]: With dead ends: 55 [2020-10-27 14:03:37,269 INFO L226 Difference]: Without dead ends: 33 [2020-10-27 14:03:37,270 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:03:37,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-27 14:03:37,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-10-27 14:03:37,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-27 14:03:37,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-10-27 14:03:37,290 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 43 [2020-10-27 14:03:37,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:03:37,291 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-10-27 14:03:37,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 14:03:37,291 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-10-27 14:03:37,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 14:03:37,293 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:03:37,293 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2020-10-27 14:03:37,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 14:03:37,294 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:03:37,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:03:37,298 INFO L82 PathProgramCache]: Analyzing trace with hash 39147832, now seen corresponding path program 1 times [2020-10-27 14:03:37,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:03:37,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [116671356] [2020-10-27 14:03:37,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:03:37,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:03:37,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:03:37,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:03:37,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 14:03:37,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:03:37,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 125 [2020-10-27 14:03:37,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:03:37,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 14:03:37,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:03:37,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 14:03:37,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:03:37,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:03:37,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:03:37,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:03:37,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:03:37,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:03:37,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:03:37,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:03:37,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:03:37,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:03:37,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:03:37,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:03:37,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:03:37,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-27 14:03:37,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:03:37,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:03:37,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:03:37,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-27 14:03:37,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:03:37,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:03:37,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:03:37,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:03:37,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-10-27 14:03:37,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:03:37,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:03:37,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-27 14:03:37,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:03:37,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:03:37,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:03:37,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-27 14:03:37,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:03:37,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:03:37,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:03:37,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:03:37,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-10-27 14:03:37,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:03:37,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:03:37,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-27 14:03:37,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:03:37,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:03:37,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:03:37,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-27 14:03:37,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:03:37,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:03:37,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:03:37,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:03:37,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-10-27 14:03:37,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:03:37,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:03:37,567 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-10-27 14:03:37,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [116671356] [2020-10-27 14:03:37,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:03:37,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 14:03:37,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695449391] [2020-10-27 14:03:37,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 14:03:37,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:03:37,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 14:03:37,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:03:37,570 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 5 states. [2020-10-27 14:03:37,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:03:37,714 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2020-10-27 14:03:37,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 14:03:37,715 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 45 [2020-10-27 14:03:37,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:03:37,716 INFO L225 Difference]: With dead ends: 56 [2020-10-27 14:03:37,716 INFO L226 Difference]: Without dead ends: 34 [2020-10-27 14:03:37,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:03:37,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-27 14:03:37,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-27 14:03:37,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-27 14:03:37,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-10-27 14:03:37,724 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 45 [2020-10-27 14:03:37,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:03:37,724 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-10-27 14:03:37,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 14:03:37,725 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-10-27 14:03:37,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 14:03:37,726 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:03:37,726 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2020-10-27 14:03:37,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 14:03:37,726 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:03:37,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:03:37,727 INFO L82 PathProgramCache]: Analyzing trace with hash -555576518, now seen corresponding path program 2 times [2020-10-27 14:03:37,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:03:37,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [381933160] [2020-10-27 14:03:37,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:03:37,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-27 14:03:37,752 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-27 14:03:37,752 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-27 14:03:37,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 14:03:37,778 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 02:03:37 BoogieIcfgContainer [2020-10-27 14:03:37,779 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-27 14:03:37,781 INFO L168 Benchmark]: Toolchain (without parser) took 7734.82 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 126.1 MB in the beginning and 186.9 MB in the end (delta: -60.8 MB). Peak memory consumption was 7.9 MB. Max. memory is 8.0 GB. [2020-10-27 14:03:37,782 INFO L168 Benchmark]: CDTParser took 1.39 ms. Allocated memory is still 151.0 MB. Free memory is still 123.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 14:03:37,783 INFO L168 Benchmark]: CACSL2BoogieTranslator took 416.40 ms. Allocated memory is still 151.0 MB. Free memory was 125.3 MB in the beginning and 115.4 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-10-27 14:03:37,784 INFO L168 Benchmark]: Boogie Preprocessor took 86.07 ms. Allocated memory is still 151.0 MB. Free memory was 115.4 MB in the beginning and 113.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-27 14:03:37,785 INFO L168 Benchmark]: RCFGBuilder took 507.27 ms. Allocated memory is still 151.0 MB. Free memory was 113.6 MB in the beginning and 131.1 MB in the end (delta: -17.5 MB). Peak memory consumption was 17.6 MB. Max. memory is 8.0 GB. [2020-10-27 14:03:37,786 INFO L168 Benchmark]: TraceAbstraction took 6711.55 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 130.5 MB in the beginning and 186.9 MB in the end (delta: -56.4 MB). Peak memory consumption was 11.3 MB. Max. memory is 8.0 GB. [2020-10-27 14:03:37,789 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.39 ms. Allocated memory is still 151.0 MB. Free memory is still 123.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 416.40 ms. Allocated memory is still 151.0 MB. Free memory was 125.3 MB in the beginning and 115.4 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 86.07 ms. Allocated memory is still 151.0 MB. Free memory was 115.4 MB in the beginning and 113.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 507.27 ms. Allocated memory is still 151.0 MB. Free memory was 113.6 MB in the beginning and 131.1 MB in the end (delta: -17.5 MB). Peak memory consumption was 17.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 6711.55 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 130.5 MB in the beginning and 186.9 MB in the end (delta: -56.4 MB). Peak memory consumption was 11.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 14]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of bitwiseAnd at line 25. Possible FailurePath: [L17] int N; [L32] N = __VERIFIER_nondet_int() [L33] COND TRUE N > 1 [L34] int x[N]; [L35] int temp; [L36] int ret; [L37] int ret2; [L38] int ret5; [L40] int i = 0; [L40] COND TRUE i < N [L42] x[i] = __VERIFIER_nondet_int() [L40] i++ [L40] COND TRUE i < N [L42] x[i] = __VERIFIER_nondet_int() [L40] i++ [L40] COND FALSE !(i < N) [L45] CALL, EXPR bAnd(x) [L21] int i; [L22] long long res; [L23] EXPR x[0] [L23] res = x[0] [L24] i = 1 [L24] COND TRUE i < N [L25] EXPR x[i] [L25] res = res & x[i] [L24] i++ [L24] COND FALSE !(i < N) [L27] return res; [L45] RET, EXPR bAnd(x) [L45] ret = bAnd(x) [L47] EXPR x[0] [L47] temp=x[0] [L47] EXPR x[1] [L47] x[0] = x[1] [L47] x[1] = temp [L48] CALL, EXPR bAnd(x) [L21] int i; [L22] long long res; [L23] EXPR x[0] [L23] res = x[0] [L24] i = 1 [L24] COND TRUE i < N [L25] EXPR x[i] [L25] res = res & x[i] [L24] i++ [L24] COND FALSE !(i < N) [L27] return res; [L48] RET, EXPR bAnd(x) [L48] ret2 = bAnd(x) [L49] EXPR x[0] [L49] temp=x[0] [L50] int i =0 ; [L50] COND TRUE i