/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/loops/count_up_down-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 20:22:49,575 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 20:22:49,578 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 20:22:49,637 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 20:22:49,637 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 20:22:49,644 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 20:22:49,647 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 20:22:49,651 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 20:22:49,655 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 20:22:49,661 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 20:22:49,662 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 20:22:49,664 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 20:22:49,664 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 20:22:49,668 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 20:22:49,672 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 20:22:49,674 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 20:22:49,675 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 20:22:49,676 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 20:22:49,678 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 20:22:49,703 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 20:22:49,710 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 20:22:49,711 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 20:22:49,713 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 20:22:49,714 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 20:22:49,719 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 20:22:49,723 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 20:22:49,723 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 20:22:49,726 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 20:22:49,727 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 20:22:49,728 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 20:22:49,728 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 20:22:49,729 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 20:22:49,730 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 20:22:49,732 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 20:22:49,733 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 20:22:49,733 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 20:22:49,734 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 20:22:49,734 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 20:22:49,735 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 20:22:49,736 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 20:22:49,736 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 20:22:49,744 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 20:22:49,794 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 20:22:49,794 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 20:22:49,798 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 20:22:49,799 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 20:22:49,799 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 20:22:49,799 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 20:22:49,800 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 20:22:49,800 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 20:22:49,800 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 20:22:49,800 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 20:22:49,801 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 20:22:49,802 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 20:22:49,802 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 20:22:49,802 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 20:22:49,802 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 20:22:49,802 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 20:22:49,803 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 20:22:49,803 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 20:22:49,803 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 20:22:49,803 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 20:22:49,803 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 20:22:49,804 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:22:49,804 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 20:22:49,804 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 20:22:49,804 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 20:22:49,805 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 20:22:49,805 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 20:22:49,805 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 20:22:49,805 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 20:22:49,805 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 20:22:50,206 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 20:22:50,236 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 20:22:50,239 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 20:22:50,240 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 20:22:50,241 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 20:22:50,242 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/count_up_down-1.c [2020-10-27 20:22:50,317 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9e3d6516d/2656352cad314a49bd7ef00962eb9a05/FLAG892269917 [2020-10-27 20:22:51,047 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 20:22:51,048 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/count_up_down-1.c [2020-10-27 20:22:51,055 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9e3d6516d/2656352cad314a49bd7ef00962eb9a05/FLAG892269917 [2020-10-27 20:22:51,417 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9e3d6516d/2656352cad314a49bd7ef00962eb9a05 [2020-10-27 20:22:51,423 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 20:22:51,431 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 20:22:51,436 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 20:22:51,436 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 20:22:51,440 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 20:22:51,441 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:22:51" (1/1) ... [2020-10-27 20:22:51,446 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1290a604 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:22:51, skipping insertion in model container [2020-10-27 20:22:51,446 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:22:51" (1/1) ... [2020-10-27 20:22:51,455 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 20:22:51,474 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 20:22:51,697 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:22:51,710 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 20:22:51,733 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:22:51,754 INFO L208 MainTranslator]: Completed translation [2020-10-27 20:22:51,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:22:51 WrapperNode [2020-10-27 20:22:51,756 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 20:22:51,758 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 20:22:51,758 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 20:22:51,758 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 20:22:51,772 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:22:51" (1/1) ... [2020-10-27 20:22:51,775 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:22:51" (1/1) ... [2020-10-27 20:22:51,787 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:22:51" (1/1) ... [2020-10-27 20:22:51,788 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:22:51" (1/1) ... [2020-10-27 20:22:51,804 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:22:51" (1/1) ... [2020-10-27 20:22:51,812 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:22:51" (1/1) ... [2020-10-27 20:22:51,821 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:22:51" (1/1) ... [2020-10-27 20:22:51,824 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 20:22:51,827 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 20:22:51,827 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 20:22:51,827 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 20:22:51,829 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:22:51" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:22:51,920 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 20:22:51,920 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 20:22:51,920 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 20:22:51,921 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 20:22:51,921 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 20:22:51,921 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 20:22:51,921 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 20:22:51,921 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 20:22:51,921 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 20:22:51,922 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 20:22:51,922 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-27 20:22:51,922 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 20:22:51,922 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 20:22:51,922 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 20:22:51,922 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 20:22:51,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 20:22:51,923 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 20:22:51,923 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 20:22:52,197 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 20:22:52,197 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 20:22:52,199 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:22:52 BoogieIcfgContainer [2020-10-27 20:22:52,200 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 20:22:52,202 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 20:22:52,203 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 20:22:52,207 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 20:22:52,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 08:22:51" (1/3) ... [2020-10-27 20:22:52,209 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d3ff433 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:22:52, skipping insertion in model container [2020-10-27 20:22:52,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:22:51" (2/3) ... [2020-10-27 20:22:52,210 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d3ff433 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:22:52, skipping insertion in model container [2020-10-27 20:22:52,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:22:52" (3/3) ... [2020-10-27 20:22:52,212 INFO L111 eAbstractionObserver]: Analyzing ICFG count_up_down-1.c [2020-10-27 20:22:52,227 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 20:22:52,232 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 20:22:52,252 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 20:22:52,288 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 20:22:52,288 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 20:22:52,288 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 20:22:52,288 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 20:22:52,289 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 20:22:52,289 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 20:22:52,289 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 20:22:52,289 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 20:22:52,307 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-10-27 20:22:52,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-27 20:22:52,313 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:22:52,314 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:22:52,315 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:22:52,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:22:52,322 INFO L82 PathProgramCache]: Analyzing trace with hash 671356177, now seen corresponding path program 1 times [2020-10-27 20:22:52,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:22:52,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1392252751] [2020-10-27 20:22:52,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:22:52,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:52,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:52,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:52,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 20:22:52,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:52,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 347 [2020-10-27 20:22:52,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:52,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:22:52,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:22:52,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:22:52,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-27 20:22:53,119 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 24 [2020-10-27 20:22:53,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:22:53,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:53,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:53,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:53,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:22:53,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:53,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 20:22:53,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:53,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:22:53,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:22:53,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:22:53,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:53,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:22:53,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1392252751] [2020-10-27 20:22:53,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:22:53,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 20:22:53,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131770412] [2020-10-27 20:22:53,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 20:22:53,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:22:53,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 20:22:53,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:22:53,381 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 7 states. [2020-10-27 20:22:53,629 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2020-10-27 20:22:53,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:22:53,846 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2020-10-27 20:22:53,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 20:22:53,848 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-10-27 20:22:53,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:22:53,856 INFO L225 Difference]: With dead ends: 42 [2020-10-27 20:22:53,857 INFO L226 Difference]: Without dead ends: 14 [2020-10-27 20:22:53,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:22:53,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-27 20:22:53,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-27 20:22:53,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-27 20:22:53,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-10-27 20:22:53,905 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-10-27 20:22:53,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:22:53,906 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-10-27 20:22:53,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 20:22:53,906 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-10-27 20:22:53,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-27 20:22:53,907 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:22:53,907 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:22:53,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 20:22:53,907 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:22:53,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:22:53,908 INFO L82 PathProgramCache]: Analyzing trace with hash 435169889, now seen corresponding path program 1 times [2020-10-27 20:22:53,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:22:53,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1929649380] [2020-10-27 20:22:53,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:22:53,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:53,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:54,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:54,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 20:22:54,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:54,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 267 [2020-10-27 20:22:54,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:54,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:22:54,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:22:54,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 20:22:54,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:54,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:22:54,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:54,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:54,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:54,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:22:54,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:54,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 20:22:54,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:54,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:22:54,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:22:54,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:22:54,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:54,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:22:54,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1929649380] [2020-10-27 20:22:54,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:22:54,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 20:22:54,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395186955] [2020-10-27 20:22:54,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 20:22:54,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:22:54,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 20:22:54,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:22:54,545 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 8 states. [2020-10-27 20:22:54,806 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2020-10-27 20:22:54,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:22:54,926 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-10-27 20:22:54,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 20:22:54,927 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-10-27 20:22:54,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:22:54,928 INFO L225 Difference]: With dead ends: 21 [2020-10-27 20:22:54,928 INFO L226 Difference]: Without dead ends: 15 [2020-10-27 20:22:54,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:22:54,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-27 20:22:54,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-27 20:22:54,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-27 20:22:54,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-10-27 20:22:54,937 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2020-10-27 20:22:54,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:22:54,938 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-10-27 20:22:54,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 20:22:54,938 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-10-27 20:22:54,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-27 20:22:54,939 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:22:54,939 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:22:54,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 20:22:54,940 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:22:54,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:22:54,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1703329553, now seen corresponding path program 2 times [2020-10-27 20:22:54,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:22:54,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1263022522] [2020-10-27 20:22:54,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:22:54,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:55,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:55,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:55,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 20:22:55,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:55,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 207 [2020-10-27 20:22:55,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:55,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 20:22:55,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:22:55,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 20:22:55,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:55,431 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 37 [2020-10-27 20:22:55,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:22:55,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:55,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:55,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:55,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:22:55,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:55,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:22:55,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:55,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:22:55,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:22:55,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:22:55,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:55,570 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:22:55,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1263022522] [2020-10-27 20:22:55,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:22:55,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 20:22:55,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735752153] [2020-10-27 20:22:55,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 20:22:55,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:22:55,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 20:22:55,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:22:55,573 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 9 states. [2020-10-27 20:22:55,927 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-10-27 20:22:56,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:22:56,076 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-10-27 20:22:56,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 20:22:56,077 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2020-10-27 20:22:56,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:22:56,078 INFO L225 Difference]: With dead ends: 22 [2020-10-27 20:22:56,078 INFO L226 Difference]: Without dead ends: 16 [2020-10-27 20:22:56,079 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-27 20:22:56,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-27 20:22:56,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-27 20:22:56,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-27 20:22:56,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-10-27 20:22:56,086 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2020-10-27 20:22:56,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:22:56,086 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-10-27 20:22:56,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 20:22:56,087 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-10-27 20:22:56,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-27 20:22:56,087 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:22:56,088 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:22:56,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 20:22:56,088 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:22:56,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:22:56,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1933393823, now seen corresponding path program 3 times [2020-10-27 20:22:56,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:22:56,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1662276384] [2020-10-27 20:22:56,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:22:56,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:56,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:56,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:56,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 20:22:56,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:56,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 294 [2020-10-27 20:22:56,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:56,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 20:22:56,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:22:56,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 20:22:56,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:56,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:22:56,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:56,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:56,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:56,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:22:56,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:56,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 20:22:56,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:56,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:22:56,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:22:56,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:22:56,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:56,809 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:22:56,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1662276384] [2020-10-27 20:22:56,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:22:56,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 20:22:56,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466652359] [2020-10-27 20:22:56,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 20:22:56,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:22:56,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 20:22:56,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-27 20:22:56,815 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 10 states. [2020-10-27 20:22:57,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:22:57,369 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2020-10-27 20:22:57,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 20:22:57,377 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2020-10-27 20:22:57,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:22:57,378 INFO L225 Difference]: With dead ends: 23 [2020-10-27 20:22:57,378 INFO L226 Difference]: Without dead ends: 17 [2020-10-27 20:22:57,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-27 20:22:57,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-27 20:22:57,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-27 20:22:57,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-27 20:22:57,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-10-27 20:22:57,389 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2020-10-27 20:22:57,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:22:57,389 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-10-27 20:22:57,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 20:22:57,389 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-10-27 20:22:57,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 20:22:57,393 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:22:57,393 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:22:57,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 20:22:57,394 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:22:57,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:22:57,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1292298513, now seen corresponding path program 4 times [2020-10-27 20:22:57,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:22:57,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [216221961] [2020-10-27 20:22:57,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:22:57,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:57,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:57,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:57,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 20:22:57,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:57,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 317 [2020-10-27 20:22:57,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:57,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 20:22:57,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:22:57,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 20:22:57,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:58,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:22:58,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:58,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:58,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:58,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:22:58,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:58,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:22:58,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:58,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:22:58,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:22:58,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:22:58,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:58,037 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 20:22:58,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [216221961] [2020-10-27 20:22:58,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:22:58,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 20:22:58,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500118565] [2020-10-27 20:22:58,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 20:22:58,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:22:58,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 20:22:58,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-27 20:22:58,040 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 10 states. [2020-10-27 20:22:58,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:22:58,354 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2020-10-27 20:22:58,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 20:22:58,354 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2020-10-27 20:22:58,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:22:58,355 INFO L225 Difference]: With dead ends: 17 [2020-10-27 20:22:58,355 INFO L226 Difference]: Without dead ends: 0 [2020-10-27 20:22:58,355 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-10-27 20:22:58,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-27 20:22:58,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-27 20:22:58,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-27 20:22:58,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-27 20:22:58,357 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2020-10-27 20:22:58,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:22:58,357 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-27 20:22:58,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 20:22:58,357 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-27 20:22:58,357 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-27 20:22:58,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 20:22:58,360 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-27 20:22:58,652 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2020-10-27 20:22:58,652 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 3) the Hoare annotation is: true [2020-10-27 20:22:58,652 INFO L274 CegarLoopResult]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2020-10-27 20:22:58,652 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-27 20:22:58,653 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-27 20:22:58,653 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|)) [2020-10-27 20:22:58,653 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-27 20:22:58,653 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-27 20:22:58,653 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-27 20:22:58,653 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-27 20:22:58,653 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-27 20:22:58,654 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 13 23) the Hoare annotation is: true [2020-10-27 20:22:58,654 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 13 23) no Hoare annotation was computed. [2020-10-27 20:22:58,654 INFO L270 CegarLoopResult]: At program point L17-2(lines 17 21) the Hoare annotation is: (let ((.cse0 (+ main_~x~0 main_~y~0))) (and (<= main_~n~0 .cse0) (<= .cse0 main_~n~0))) [2020-10-27 20:22:58,656 INFO L270 CegarLoopResult]: At program point L17-3(lines 17 21) the Hoare annotation is: (let ((.cse1 (+ main_~n~0 (* 4294967296 (div main_~y~0 4294967296)))) (.cse0 (+ (* 4294967296 (div main_~n~0 4294967296)) main_~y~0))) (and (<= .cse0 .cse1) (<= .cse1 .cse0))) [2020-10-27 20:22:58,656 INFO L274 CegarLoopResult]: For program point mainFINAL(lines 13 23) no Hoare annotation was computed. [2020-10-27 20:22:58,657 INFO L277 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 5 10) the Hoare annotation is: true [2020-10-27 20:22:58,657 INFO L274 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 5 10) no Hoare annotation was computed. [2020-10-27 20:22:58,657 INFO L270 CegarLoopResult]: At program point L7(line 7) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-10-27 20:22:58,657 INFO L274 CegarLoopResult]: For program point L6(lines 6 8) no Hoare annotation was computed. [2020-10-27 20:22:58,657 INFO L274 CegarLoopResult]: For program point L7-1(line 7) no Hoare annotation was computed. [2020-10-27 20:22:58,657 INFO L274 CegarLoopResult]: For program point L6-2(lines 5 10) no Hoare annotation was computed. [2020-10-27 20:22:58,676 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 08:22:58 BoogieIcfgContainer [2020-10-27 20:22:58,676 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-27 20:22:58,680 INFO L168 Benchmark]: Toolchain (without parser) took 7252.34 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 126.6 MB in the beginning and 148.9 MB in the end (delta: -22.3 MB). Peak memory consumption was 45.6 MB. Max. memory is 8.0 GB. [2020-10-27 20:22:58,683 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 151.0 MB. Free memory is still 123.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 20:22:58,685 INFO L168 Benchmark]: CACSL2BoogieTranslator took 321.06 ms. Allocated memory is still 151.0 MB. Free memory was 125.9 MB in the beginning and 116.8 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-27 20:22:58,686 INFO L168 Benchmark]: Boogie Preprocessor took 66.84 ms. Allocated memory is still 151.0 MB. Free memory was 116.8 MB in the beginning and 115.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-27 20:22:58,688 INFO L168 Benchmark]: RCFGBuilder took 372.71 ms. Allocated memory is still 151.0 MB. Free memory was 115.4 MB in the beginning and 103.3 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-10-27 20:22:58,688 INFO L168 Benchmark]: TraceAbstraction took 6473.89 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 102.9 MB in the beginning and 148.9 MB in the end (delta: -46.0 MB). Peak memory consumption was 22.6 MB. Max. memory is 8.0 GB. [2020-10-27 20:22:58,699 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 151.0 MB. Free memory is still 123.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 321.06 ms. Allocated memory is still 151.0 MB. Free memory was 125.9 MB in the beginning and 116.8 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 66.84 ms. Allocated memory is still 151.0 MB. Free memory was 116.8 MB in the beginning and 115.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 372.71 ms. Allocated memory is still 151.0 MB. Free memory was 115.4 MB in the beginning and 103.3 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 6473.89 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 102.9 MB in the beginning and 148.9 MB in the end (delta: -46.0 MB). Peak memory consumption was 22.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: 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: 17]: Loop Invariant Derived loop invariant: n <= x + y && x + y <= n - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6.0s, OverallIterations: 5, TraceHistogramMax: 4, AutomataDifference: 2.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 46 SDtfs, 57 SDslu, 169 SDs, 0 SdLazy, 236 SolverSat, 41 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 78 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 2.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 23 PreInvPairs, 32 NumberOfFragments, 81 HoareAnnotationTreeSize, 23 FomulaSimplifications, 537 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 9 FomulaSimplificationsInter, 445 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.2s InterpolantComputationTime, 70 NumberOfCodeBlocks, 70 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 65 ConstructedInterpolants, 0 QuantifiedInterpolants, 11568 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 1/20 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...