/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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=BIGGEST --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 -i ../../../trunk/examples/svcomp/loops/count_up_down-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 16:10:14,479 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 16:10:14,482 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 16:10:14,507 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 16:10:14,507 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 16:10:14,508 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 16:10:14,510 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 16:10:14,512 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 16:10:14,513 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 16:10:14,514 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 16:10:14,515 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 16:10:14,516 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 16:10:14,517 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 16:10:14,518 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 16:10:14,519 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 16:10:14,520 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 16:10:14,521 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 16:10:14,522 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 16:10:14,523 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 16:10:14,525 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 16:10:14,527 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 16:10:14,528 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 16:10:14,529 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 16:10:14,530 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 16:10:14,533 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 16:10:14,533 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 16:10:14,534 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 16:10:14,535 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 16:10:14,535 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 16:10:14,536 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 16:10:14,536 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 16:10:14,537 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 16:10:14,538 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 16:10:14,539 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 16:10:14,540 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 16:10:14,540 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 16:10:14,541 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 16:10:14,541 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 16:10:14,541 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 16:10:14,542 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 16:10:14,544 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 16:10:14,545 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 [2020-10-12 16:10:14,598 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 16:10:14,598 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 16:10:14,599 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 16:10:14,600 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 16:10:14,600 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 16:10:14,600 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 16:10:14,600 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 16:10:14,601 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 16:10:14,601 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 16:10:14,601 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 16:10:14,601 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 16:10:14,601 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 16:10:14,602 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 16:10:14,602 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 16:10:14,605 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 16:10:14,605 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 16:10:14,606 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 16:10:14,606 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 16:10:14,606 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 16:10:14,606 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 16:10:14,606 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 16:10:14,607 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 16:10:14,607 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 16:10:14,609 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 16:10:14,609 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 16:10:14,610 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 16:10:14,610 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 16:10:14,610 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 16:10:14,610 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 16:10:14,610 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 16:10:14,978 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 16:10:15,002 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 16:10:15,006 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 16:10:15,008 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 16:10:15,009 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 16:10:15,009 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/count_up_down-1.c [2020-10-12 16:10:15,088 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/872c50b65/3950bb8809344e69b3139f35fcbbf4b5/FLAG89b9cae7f [2020-10-12 16:10:15,540 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 16:10:15,540 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/count_up_down-1.c [2020-10-12 16:10:15,546 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/872c50b65/3950bb8809344e69b3139f35fcbbf4b5/FLAG89b9cae7f [2020-10-12 16:10:15,911 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/872c50b65/3950bb8809344e69b3139f35fcbbf4b5 [2020-10-12 16:10:15,921 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 16:10:15,923 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 16:10:15,925 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 16:10:15,925 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 16:10:15,928 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 16:10:15,929 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 04:10:15" (1/1) ... [2020-10-12 16:10:15,932 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c77fbdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:10:15, skipping insertion in model container [2020-10-12 16:10:15,933 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 04:10:15" (1/1) ... [2020-10-12 16:10:15,941 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 16:10:15,957 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 16:10:16,160 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 16:10:16,166 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 16:10:16,188 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 16:10:16,204 INFO L208 MainTranslator]: Completed translation [2020-10-12 16:10:16,205 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:10:16 WrapperNode [2020-10-12 16:10:16,205 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 16:10:16,206 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 16:10:16,213 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 16:10:16,214 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 16:10:16,228 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:10:16" (1/1) ... [2020-10-12 16:10:16,230 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:10:16" (1/1) ... [2020-10-12 16:10:16,236 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:10:16" (1/1) ... [2020-10-12 16:10:16,236 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:10:16" (1/1) ... [2020-10-12 16:10:16,241 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:10:16" (1/1) ... [2020-10-12 16:10:16,249 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:10:16" (1/1) ... [2020-10-12 16:10:16,250 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:10:16" (1/1) ... [2020-10-12 16:10:16,363 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 16:10:16,364 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 16:10:16,364 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 16:10:16,364 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 16:10:16,365 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:10:16" (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 [2020-10-12 16:10:16,435 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 16:10:16,435 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 16:10:16,435 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 16:10:16,435 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 16:10:16,435 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 16:10:16,436 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 16:10:16,436 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-12 16:10:16,436 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 16:10:16,436 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 16:10:16,436 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 16:10:16,601 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 16:10:16,601 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-12 16:10:16,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 04:10:16 BoogieIcfgContainer [2020-10-12 16:10:16,605 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 16:10:16,606 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 16:10:16,606 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 16:10:16,609 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 16:10:16,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 04:10:15" (1/3) ... [2020-10-12 16:10:16,610 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5098a70e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 04:10:16, skipping insertion in model container [2020-10-12 16:10:16,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:10:16" (2/3) ... [2020-10-12 16:10:16,611 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5098a70e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 04:10:16, skipping insertion in model container [2020-10-12 16:10:16,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 04:10:16" (3/3) ... [2020-10-12 16:10:16,613 INFO L109 eAbstractionObserver]: Analyzing ICFG count_up_down-1.c [2020-10-12 16:10:16,624 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 16:10:16,631 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 16:10:16,645 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 16:10:16,669 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 16:10:16,669 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 16:10:16,669 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 16:10:16,670 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 16:10:16,670 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 16:10:16,670 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 16:10:16,670 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 16:10:16,670 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 16:10:16,686 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-10-12 16:10:16,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-12 16:10:16,691 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:16,692 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:16,693 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:16,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:16,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1846144830, now seen corresponding path program 1 times [2020-10-12 16:10:16,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:16,707 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [812238610] [2020-10-12 16:10:16,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:16,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:16,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:17,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:17,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-12 16:10:17,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:17,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 232 [2020-10-12 16:10:17,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:17,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 16:10:17,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:10:17,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 16:10:17,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 16:10:17,276 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 25 [2020-10-12 16:10:17,482 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 12 [2020-10-12 16:10:17,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:10:17,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:17,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:17,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:17,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:10:17,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:17,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-12 16:10:17,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:17,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:10:17,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:10:17,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:10:17,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-12 16:10:17,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:10:17,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [812238610] [2020-10-12 16:10:17,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 16:10:17,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 16:10:17,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469816505] [2020-10-12 16:10:17,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 16:10:17,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:10:17,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 16:10:17,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:10:17,585 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 6 states. [2020-10-12 16:10:17,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:10:17,724 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2020-10-12 16:10:17,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 16:10:17,727 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-12 16:10:17,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:10:17,736 INFO L225 Difference]: With dead ends: 36 [2020-10-12 16:10:17,736 INFO L226 Difference]: Without dead ends: 12 [2020-10-12 16:10:17,740 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:10:17,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-10-12 16:10:17,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-10-12 16:10:17,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-12 16:10:17,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-10-12 16:10:17,781 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2020-10-12 16:10:17,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:10:17,782 INFO L479 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-10-12 16:10:17,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 16:10:17,782 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-10-12 16:10:17,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-12 16:10:17,783 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:17,783 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:17,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 16:10:17,784 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:17,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:17,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1432376145, now seen corresponding path program 1 times [2020-10-12 16:10:17,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:17,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1932026156] [2020-10-12 16:10:17,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:17,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:17,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:17,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:17,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-12 16:10:17,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:17,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 167 [2020-10-12 16:10:17,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:17,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 16:10:17,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:10:17,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 16:10:17,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:10:18,223 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 32 [2020-10-12 16:10:18,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:10:18,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:18,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:18,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:18,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:10:18,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:18,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:10:18,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:18,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:10:18,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:10:18,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:10:18,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:18,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:10:18,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1932026156] [2020-10-12 16:10:18,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:10:18,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 16:10:18,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963771613] [2020-10-12 16:10:18,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 16:10:18,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:10:18,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 16:10:18,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:10:18,287 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 7 states. [2020-10-12 16:10:18,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:10:18,336 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2020-10-12 16:10:18,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 16:10:18,337 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-10-12 16:10:18,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:10:18,337 INFO L225 Difference]: With dead ends: 18 [2020-10-12 16:10:18,338 INFO L226 Difference]: Without dead ends: 13 [2020-10-12 16:10:18,339 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:10:18,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-10-12 16:10:18,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-10-12 16:10:18,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-12 16:10:18,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-10-12 16:10:18,345 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2020-10-12 16:10:18,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:10:18,345 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-10-12 16:10:18,345 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 16:10:18,345 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-10-12 16:10:18,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-12 16:10:18,346 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:18,346 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:18,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 16:10:18,347 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:18,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:18,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1490448798, now seen corresponding path program 2 times [2020-10-12 16:10:18,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:18,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1814390259] [2020-10-12 16:10:18,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:18,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:18,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:18,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:18,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-12 16:10:18,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:18,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 171 [2020-10-12 16:10:18,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:18,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 16:10:18,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:10:18,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-12 16:10:18,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:18,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:10:18,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:18,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:18,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:18,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:10:18,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:18,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:10:18,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:18,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:10:18,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:10:18,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:10:18,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:18,831 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:10:18,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1814390259] [2020-10-12 16:10:18,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:10:18,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 16:10:18,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229318780] [2020-10-12 16:10:18,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 16:10:18,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:10:18,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 16:10:18,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:10:18,834 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 8 states. [2020-10-12 16:10:18,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:10:18,955 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2020-10-12 16:10:18,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 16:10:18,955 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-10-12 16:10:18,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:10:18,956 INFO L225 Difference]: With dead ends: 13 [2020-10-12 16:10:18,956 INFO L226 Difference]: Without dead ends: 0 [2020-10-12 16:10:18,957 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:10:18,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-12 16:10:18,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-12 16:10:18,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-12 16:10:18,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-12 16:10:18,958 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 12 [2020-10-12 16:10:18,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:10:18,958 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-12 16:10:18,958 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 16:10:18,959 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-12 16:10:18,959 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-12 16:10:18,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 16:10:18,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-12 16:10:19,067 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-10-12 16:10:19,068 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-12 16:10:19,068 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-12 16:10:19,068 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-12 16:10:19,068 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-12 16:10:19,068 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-12 16:10:19,068 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 11 21) the Hoare annotation is: true [2020-10-12 16:10:19,069 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 11 21) no Hoare annotation was computed. [2020-10-12 16:10:19,069 INFO L264 CegarLoopResult]: At program point L15-2(lines 15 19) the Hoare annotation is: (or (let ((.cse0 (+ main_~x~0 main_~y~0))) (and (<= main_~n~0 .cse0) (<= .cse0 main_~n~0) (<= 1 main_~y~0) (<= 0 (+ main_~x~0 (* 4294967296 (div (+ (* (div main_~n~0 4294967296) (- 4294967296)) (* main_~x~0 (- 1)) (* main_~y~0 (- 1)) main_~n~0) 4294967296)))))) (and (<= main_~y~0 0) (<= 0 main_~y~0) (= main_~n~0 main_~x~0))) [2020-10-12 16:10:19,069 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 11 21) no Hoare annotation was computed. [2020-10-12 16:10:19,069 INFO L264 CegarLoopResult]: At program point L15-3(lines 15 19) the Hoare annotation is: (= (+ (* (div main_~n~0 4294967296) 4294967296) main_~y~0) (+ main_~n~0 (* (div main_~y~0 4294967296) 4294967296))) [2020-10-12 16:10:19,070 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-10-12 16:10:19,070 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-10-12 16:10:19,070 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-10-12 16:10:19,070 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-10-12 16:10:19,070 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-10-12 16:10:19,070 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-10-12 16:10:19,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.10 04:10:19 BoogieIcfgContainer [2020-10-12 16:10:19,091 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-12 16:10:19,093 INFO L168 Benchmark]: Toolchain (without parser) took 3169.71 ms. Allocated memory was 139.5 MB in the beginning and 235.4 MB in the end (delta: 95.9 MB). Free memory was 102.5 MB in the beginning and 117.6 MB in the end (delta: -15.1 MB). Peak memory consumption was 80.9 MB. Max. memory is 7.1 GB. [2020-10-12 16:10:19,094 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-10-12 16:10:19,095 INFO L168 Benchmark]: CACSL2BoogieTranslator took 281.41 ms. Allocated memory is still 139.5 MB. Free memory was 102.3 MB in the beginning and 92.6 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-10-12 16:10:19,096 INFO L168 Benchmark]: Boogie Preprocessor took 157.41 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 92.6 MB in the beginning and 181.8 MB in the end (delta: -89.2 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2020-10-12 16:10:19,097 INFO L168 Benchmark]: RCFGBuilder took 240.81 ms. Allocated memory is still 201.9 MB. Free memory was 181.8 MB in the beginning and 169.4 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2020-10-12 16:10:19,098 INFO L168 Benchmark]: TraceAbstraction took 2485.12 ms. Allocated memory was 201.9 MB in the beginning and 235.4 MB in the end (delta: 33.6 MB). Free memory was 168.7 MB in the beginning and 117.6 MB in the end (delta: 51.1 MB). Peak memory consumption was 84.7 MB. Max. memory is 7.1 GB. [2020-10-12 16:10:19,103 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 281.41 ms. Allocated memory is still 139.5 MB. Free memory was 102.3 MB in the beginning and 92.6 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 157.41 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 92.6 MB in the beginning and 181.8 MB in the end (delta: -89.2 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 240.81 ms. Allocated memory is still 201.9 MB. Free memory was 181.8 MB in the beginning and 169.4 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2485.12 ms. Allocated memory was 201.9 MB in the beginning and 235.4 MB in the end (delta: 33.6 MB). Free memory was 168.7 MB in the beginning and 117.6 MB in the end (delta: 51.1 MB). Peak memory consumption was 84.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: 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 - InvariantResult [Line: 15]: Loop Invariant Derived loop invariant: (((n <= x + y && x + y <= n) && 1 <= y) && 0 <= x + 4294967296 * ((n / 4294967296 * -4294967296 + x * -1 + y * -1 + n) / 4294967296)) || ((y <= 0 && 0 <= y) && n == x) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.2s, OverallIterations: 3, TraceHistogramMax: 2, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 27 SDtfs, 13 SDslu, 103 SDs, 0 SdLazy, 62 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred 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, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 10 PreInvPairs, 15 NumberOfFragments, 66 HoareAnnotationTreeSize, 10 FomulaSimplifications, 130 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 153 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 33 NumberOfCodeBlocks, 33 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 30 ConstructedInterpolants, 0 QuantifiedInterpolants, 4049 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 0/4 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...