/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --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/recursive-simple/id2_b3_o5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 12:09:27,338 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 12:09:27,341 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 12:09:27,405 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 12:09:27,406 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 12:09:27,413 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 12:09:27,416 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 12:09:27,421 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 12:09:27,426 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 12:09:27,434 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 12:09:27,435 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 12:09:27,437 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 12:09:27,438 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 12:09:27,442 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 12:09:27,445 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 12:09:27,447 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 12:09:27,449 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 12:09:27,453 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 12:09:27,461 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 12:09:27,469 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 12:09:27,472 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 12:09:27,474 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 12:09:27,475 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 12:09:27,479 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 12:09:27,504 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 12:09:27,505 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 12:09:27,507 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 12:09:27,509 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 12:09:27,509 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 12:09:27,524 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 12:09:27,524 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 12:09:27,525 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 12:09:27,526 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 12:09:27,527 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 12:09:27,528 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 12:09:27,529 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 12:09:27,530 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 12:09:27,530 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 12:09:27,530 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 12:09:27,531 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 12:09:27,532 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 12:09:27,536 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 [2020-10-29 12:09:27,578 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 12:09:27,578 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 12:09:27,580 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 12:09:27,580 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 12:09:27,581 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 12:09:27,581 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 12:09:27,581 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 12:09:27,581 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 12:09:27,581 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 12:09:27,582 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 12:09:27,582 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 12:09:27,582 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 12:09:27,582 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 12:09:27,582 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 12:09:27,582 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 12:09:27,583 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 12:09:27,583 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 12:09:27,583 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 12:09:27,583 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 12:09:27,583 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 12:09:27,584 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 12:09:27,584 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 12:09:27,584 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 12:09:27,584 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 12:09:27,584 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 12:09:27,585 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 12:09:27,585 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 12:09:27,585 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 12:09:27,585 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 12:09:27,585 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 12:09:27,960 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 12:09:27,992 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 12:09:27,995 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 12:09:27,997 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 12:09:27,997 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 12:09:27,999 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id2_b3_o5.c [2020-10-29 12:09:28,085 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8af4b0d8a/a49973ea772e47b4ad9adc4f8979c977/FLAGb7a013b00 [2020-10-29 12:09:28,788 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 12:09:28,789 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id2_b3_o5.c [2020-10-29 12:09:28,797 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8af4b0d8a/a49973ea772e47b4ad9adc4f8979c977/FLAGb7a013b00 [2020-10-29 12:09:29,161 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8af4b0d8a/a49973ea772e47b4ad9adc4f8979c977 [2020-10-29 12:09:29,164 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 12:09:29,172 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 12:09:29,177 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 12:09:29,177 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 12:09:29,182 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 12:09:29,183 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 12:09:29" (1/1) ... [2020-10-29 12:09:29,187 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a6e3706 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:09:29, skipping insertion in model container [2020-10-29 12:09:29,188 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 12:09:29" (1/1) ... [2020-10-29 12:09:29,197 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 12:09:29,213 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 12:09:29,388 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 12:09:29,399 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 12:09:29,419 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 12:09:29,441 INFO L208 MainTranslator]: Completed translation [2020-10-29 12:09:29,441 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:09:29 WrapperNode [2020-10-29 12:09:29,442 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 12:09:29,443 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 12:09:29,443 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 12:09:29,443 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 12:09:29,458 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:09:29" (1/1) ... [2020-10-29 12:09:29,460 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:09:29" (1/1) ... [2020-10-29 12:09:29,472 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:09:29" (1/1) ... [2020-10-29 12:09:29,472 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:09:29" (1/1) ... [2020-10-29 12:09:29,492 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:09:29" (1/1) ... [2020-10-29 12:09:29,495 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:09:29" (1/1) ... [2020-10-29 12:09:29,498 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:09:29" (1/1) ... [2020-10-29 12:09:29,508 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 12:09:29,509 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 12:09:29,510 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 12:09:29,510 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 12:09:29,512 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:09:29" (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 [2020-10-29 12:09:29,665 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 12:09:29,666 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 12:09:29,666 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 12:09:29,667 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-10-29 12:09:29,667 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2020-10-29 12:09:29,667 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 12:09:29,667 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-29 12:09:29,667 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 12:09:29,668 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 12:09:29,668 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 12:09:29,669 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 12:09:29,669 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-10-29 12:09:29,669 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2020-10-29 12:09:29,670 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 12:09:29,670 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 12:09:29,671 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 12:09:29,671 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 12:09:29,671 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 12:09:29,672 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 12:09:29,672 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 12:09:30,152 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 12:09:30,153 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 12:09:30,155 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 12:09:30 BoogieIcfgContainer [2020-10-29 12:09:30,155 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 12:09:30,157 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 12:09:30,157 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 12:09:30,161 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 12:09:30,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 12:09:29" (1/3) ... [2020-10-29 12:09:30,162 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fe225c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 12:09:30, skipping insertion in model container [2020-10-29 12:09:30,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:09:29" (2/3) ... [2020-10-29 12:09:30,163 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fe225c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 12:09:30, skipping insertion in model container [2020-10-29 12:09:30,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 12:09:30" (3/3) ... [2020-10-29 12:09:30,165 INFO L111 eAbstractionObserver]: Analyzing ICFG id2_b3_o5.c [2020-10-29 12:09:30,177 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 12:09:30,184 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 12:09:30,211 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 12:09:30,241 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 12:09:30,242 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 12:09:30,242 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 12:09:30,242 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 12:09:30,242 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 12:09:30,242 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 12:09:30,243 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 12:09:30,243 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 12:09:30,262 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-29 12:09:30,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-29 12:09:30,269 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 12:09:30,270 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 12:09:30,270 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 12:09:30,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 12:09:30,277 INFO L82 PathProgramCache]: Analyzing trace with hash 791772439, now seen corresponding path program 1 times [2020-10-29 12:09:30,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 12:09:30,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [750822700] [2020-10-29 12:09:30,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 12:09:30,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:09:30,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:09:30,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:09:30,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-29 12:09:30,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:09:30,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 288 [2020-10-29 12:09:30,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:09:30,756 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:09:30,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 12:09:30,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 12:09:30,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-29 12:09:30,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-29 12:09:30,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 12:09:30,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:09:30,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:09:30,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:09:30,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 12:09:30,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:09:30,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 12:09:30,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:09:30,976 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:09:30,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 12:09:30,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 12:09:30,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 12:09:30,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 12:09:30,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-29 12:09:30,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:09:30,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:09:31,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:09:31,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 12:09:31,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:09:31,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-29 12:09:31,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:09:31,012 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:09:31,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 12:09:31,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 12:09:31,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-29 12:09:31,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 12:09:31,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 12:09:31,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [750822700] [2020-10-29 12:09:31,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 12:09:31,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 12:09:31,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931761905] [2020-10-29 12:09:31,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 12:09:31,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 12:09:31,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 12:09:31,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 12:09:31,067 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 6 states. [2020-10-29 12:09:31,288 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-10-29 12:09:31,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 12:09:31,543 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2020-10-29 12:09:31,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 12:09:31,545 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-10-29 12:09:31,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 12:09:31,555 INFO L225 Difference]: With dead ends: 46 [2020-10-29 12:09:31,555 INFO L226 Difference]: Without dead ends: 28 [2020-10-29 12:09:31,559 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-29 12:09:31,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-29 12:09:31,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-29 12:09:31,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-29 12:09:31,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-10-29 12:09:31,611 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 15 [2020-10-29 12:09:31,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 12:09:31,611 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-10-29 12:09:31,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 12:09:31,612 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-10-29 12:09:31,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-29 12:09:31,614 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 12:09:31,614 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 12:09:31,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 12:09:31,615 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 12:09:31,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 12:09:31,615 INFO L82 PathProgramCache]: Analyzing trace with hash 2001775916, now seen corresponding path program 1 times [2020-10-29 12:09:31,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 12:09:31,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1985931447] [2020-10-29 12:09:31,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 12:09:31,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:09:31,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:09:31,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:09:32,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:09:32,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-29 12:09:32,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 12:09:32,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 522 [2020-10-29 12:09:32,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:09:32,166 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:09:32,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 12:09:32,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-29 12:09:32,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-29 12:09:32,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 12:09:32,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 12:09:32,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:09:32,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:09:32,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:09:32,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 12:09:32,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:09:32,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 12:09:32,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:09:32,255 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:09:32,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 12:09:32,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 12:09:32,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 12:09:32,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 12:09:32,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-29 12:09:32,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:09:32,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:09:32,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:09:32,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-29 12:09:32,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:09:32,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-29 12:09:32,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:09:32,306 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:09:32,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 12:09:32,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-10-29 12:09:32,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-29 12:09:32,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 12:09:32,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-29 12:09:32,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:09:32,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:09:32,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:09:32,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 12:09:32,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:09:32,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-29 12:09:32,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:09:32,395 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:09:32,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 12:09:32,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 12:09:32,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-29 12:09:32,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 12:09:32,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 12:09:32,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1985931447] [2020-10-29 12:09:32,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 12:09:32,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 12:09:32,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583371743] [2020-10-29 12:09:32,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 12:09:32,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 12:09:32,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 12:09:32,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 12:09:32,425 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 6 states. [2020-10-29 12:09:32,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 12:09:32,763 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2020-10-29 12:09:32,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 12:09:32,764 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-29 12:09:32,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 12:09:32,766 INFO L225 Difference]: With dead ends: 47 [2020-10-29 12:09:32,766 INFO L226 Difference]: Without dead ends: 34 [2020-10-29 12:09:32,767 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-29 12:09:32,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-29 12:09:32,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-10-29 12:09:32,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-29 12:09:32,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-10-29 12:09:32,778 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 22 [2020-10-29 12:09:32,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 12:09:32,779 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-10-29 12:09:32,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 12:09:32,779 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-10-29 12:09:32,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-29 12:09:32,780 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 12:09:32,781 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 12:09:32,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 12:09:32,781 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 12:09:32,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 12:09:32,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1405687699, now seen corresponding path program 1 times [2020-10-29 12:09:32,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 12:09:32,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1110883735] [2020-10-29 12:09:32,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 12:09:32,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:09:32,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:09:32,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:09:32,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-29 12:09:32,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:09:32,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 64 [2020-10-29 12:09:32,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:09:32,862 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:09:32,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 12:09:32,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-29 12:09:32,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-29 12:09:32,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 12:09:32,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 12:09:32,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:09:32,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:09:32,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:09:32,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 12:09:32,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:09:32,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 12:09:32,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:09:32,947 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:09:32,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 12:09:32,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 12:09:32,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 12:09:32,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 12:09:32,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-29 12:09:32,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:09:32,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:09:32,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:09:32,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-29 12:09:32,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:09:32,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-29 12:09:32,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:09:32,980 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:09:32,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 12:09:32,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 12:09:32,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 12:09:32,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 12:09:32,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-29 12:09:33,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:09:33,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:09:33,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:09:33,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 12:09:33,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:09:33,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 12:09:33,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:09:33,004 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:09:33,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 12:09:33,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 12:09:33,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 12:09:33,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 12:09:33,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 12:09:33,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1110883735] [2020-10-29 12:09:33,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 12:09:33,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 12:09:33,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007963969] [2020-10-29 12:09:33,010 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 12:09:33,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 12:09:33,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 12:09:33,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 12:09:33,011 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 6 states. [2020-10-29 12:09:33,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 12:09:33,249 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-10-29 12:09:33,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 12:09:33,250 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-29 12:09:33,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 12:09:33,250 INFO L225 Difference]: With dead ends: 32 [2020-10-29 12:09:33,250 INFO L226 Difference]: Without dead ends: 0 [2020-10-29 12:09:33,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-29 12:09:33,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-29 12:09:33,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-29 12:09:33,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-29 12:09:33,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-29 12:09:33,252 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 22 [2020-10-29 12:09:33,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 12:09:33,253 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-29 12:09:33,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 12:09:33,253 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-29 12:09:33,253 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-29 12:09:33,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 12:09:33,256 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-29 12:09:33,352 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 4) no Hoare annotation was computed. [2020-10-29 12:09:33,352 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 4) the Hoare annotation is: true [2020-10-29 12:09:33,352 INFO L274 CegarLoopResult]: For program point reach_errorFINAL(line 4) no Hoare annotation was computed. [2020-10-29 12:09:33,352 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2020-10-29 12:09:33,353 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-29 12:09:33,353 INFO L270 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-10-29 12:09:33,353 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-29 12:09:33,353 INFO L274 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-10-29 12:09:33,353 INFO L274 CegarLoopResult]: For program point L18-1(line 18) no Hoare annotation was computed. [2020-10-29 12:09:33,353 INFO L274 CegarLoopResult]: For program point id2EXIT(lines 16 21) no Hoare annotation was computed. [2020-10-29 12:09:33,353 INFO L277 CegarLoopResult]: At program point id2ENTRY(lines 16 21) the Hoare annotation is: true [2020-10-29 12:09:33,354 INFO L274 CegarLoopResult]: For program point L19(line 19) no Hoare annotation was computed. [2020-10-29 12:09:33,354 INFO L274 CegarLoopResult]: For program point id2FINAL(lines 16 21) no Hoare annotation was computed. [2020-10-29 12:09:33,354 INFO L277 CegarLoopResult]: At program point L18(line 18) the Hoare annotation is: true [2020-10-29 12:09:33,354 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-29 12:09:33,354 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-29 12:09:33,354 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-29 12:09:33,354 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-29 12:09:33,354 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 23 29) the Hoare annotation is: true [2020-10-29 12:09:33,355 INFO L270 CegarLoopResult]: At program point L27(line 27) the Hoare annotation is: false [2020-10-29 12:09:33,355 INFO L274 CegarLoopResult]: For program point L26(lines 26 28) no Hoare annotation was computed. [2020-10-29 12:09:33,355 INFO L274 CegarLoopResult]: For program point L27-1(line 27) no Hoare annotation was computed. [2020-10-29 12:09:33,355 INFO L277 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: true [2020-10-29 12:09:33,355 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 23 29) no Hoare annotation was computed. [2020-10-29 12:09:33,355 INFO L274 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2020-10-29 12:09:33,355 INFO L274 CegarLoopResult]: For program point L26-2(lines 23 29) no Hoare annotation was computed. [2020-10-29 12:09:33,355 INFO L274 CegarLoopResult]: For program point idFINAL(lines 9 14) no Hoare annotation was computed. [2020-10-29 12:09:33,356 INFO L274 CegarLoopResult]: For program point L12(line 12) no Hoare annotation was computed. [2020-10-29 12:09:33,356 INFO L277 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: true [2020-10-29 12:09:33,356 INFO L274 CegarLoopResult]: For program point idEXIT(lines 9 14) no Hoare annotation was computed. [2020-10-29 12:09:33,356 INFO L274 CegarLoopResult]: For program point L10(line 10) no Hoare annotation was computed. [2020-10-29 12:09:33,356 INFO L274 CegarLoopResult]: For program point L11-1(line 11) no Hoare annotation was computed. [2020-10-29 12:09:33,356 INFO L277 CegarLoopResult]: At program point idENTRY(lines 9 14) the Hoare annotation is: true [2020-10-29 12:09:33,362 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.10 12:09:33 BoogieIcfgContainer [2020-10-29 12:09:33,362 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-29 12:09:33,365 INFO L168 Benchmark]: Toolchain (without parser) took 4197.49 ms. Allocated memory was 166.7 MB in the beginning and 200.3 MB in the end (delta: 33.6 MB). Free memory was 121.4 MB in the beginning and 81.6 MB in the end (delta: 39.8 MB). Peak memory consumption was 74.6 MB. Max. memory is 8.0 GB. [2020-10-29 12:09:33,365 INFO L168 Benchmark]: CDTParser took 0.67 ms. Allocated memory is still 166.7 MB. Free memory is still 139.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-29 12:09:33,366 INFO L168 Benchmark]: CACSL2BoogieTranslator took 265.71 ms. Allocated memory is still 166.7 MB. Free memory was 120.7 MB in the beginning and 110.9 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-29 12:09:33,367 INFO L168 Benchmark]: Boogie Preprocessor took 65.35 ms. Allocated memory is still 166.7 MB. Free memory was 110.9 MB in the beginning and 109.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-29 12:09:33,368 INFO L168 Benchmark]: RCFGBuilder took 645.65 ms. Allocated memory is still 166.7 MB. Free memory was 109.5 MB in the beginning and 137.2 MB in the end (delta: -27.7 MB). Peak memory consumption was 6.3 MB. Max. memory is 8.0 GB. [2020-10-29 12:09:33,369 INFO L168 Benchmark]: TraceAbstraction took 3205.72 ms. Allocated memory was 166.7 MB in the beginning and 200.3 MB in the end (delta: 33.6 MB). Free memory was 136.8 MB in the beginning and 81.6 MB in the end (delta: 55.2 MB). Peak memory consumption was 90.3 MB. Max. memory is 8.0 GB. [2020-10-29 12:09:33,372 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.67 ms. Allocated memory is still 166.7 MB. Free memory is still 139.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 265.71 ms. Allocated memory is still 166.7 MB. Free memory was 120.7 MB in the beginning and 110.9 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 65.35 ms. Allocated memory is still 166.7 MB. Free memory was 110.9 MB in the beginning and 109.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 645.65 ms. Allocated memory is still 166.7 MB. Free memory was 109.5 MB in the beginning and 137.2 MB in the end (delta: -27.7 MB). Peak memory consumption was 6.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3205.72 ms. Allocated memory was 166.7 MB in the beginning and 200.3 MB in the end (delta: 33.6 MB). Free memory was 136.8 MB in the beginning and 81.6 MB in the end (delta: 55.2 MB). Peak memory consumption was 90.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 4]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.0s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 75 SDtfs, 62 SDslu, 82 SDs, 0 SdLazy, 217 SolverSat, 19 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred 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, 3 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 15 PreInvPairs, 15 NumberOfFragments, 41 HoareAnnotationTreeSize, 15 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 180 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 59 NumberOfCodeBlocks, 59 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 56 ConstructedInterpolants, 0 QuantifiedInterpolants, 4494 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 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 correct! Received shutdown request...