/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/recursive-simple/afterrec-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 17:15:44,491 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 17:15:44,494 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 17:15:44,529 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 17:15:44,530 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 17:15:44,532 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 17:15:44,533 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 17:15:44,536 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 17:15:44,538 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 17:15:44,540 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 17:15:44,541 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 17:15:44,542 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 17:15:44,543 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 17:15:44,544 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 17:15:44,546 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 17:15:44,547 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 17:15:44,548 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 17:15:44,549 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 17:15:44,551 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 17:15:44,566 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 17:15:44,568 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 17:15:44,570 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 17:15:44,571 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 17:15:44,572 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 17:15:44,576 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 17:15:44,576 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 17:15:44,576 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 17:15:44,578 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 17:15:44,578 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 17:15:44,580 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 17:15:44,580 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 17:15:44,581 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 17:15:44,582 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 17:15:44,583 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 17:15:44,584 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 17:15:44,585 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 17:15:44,586 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 17:15:44,586 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 17:15:44,586 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 17:15:44,588 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 17:15:44,589 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 17:15:44,590 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 [2020-10-28 17:15:44,620 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 17:15:44,621 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 17:15:44,623 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 17:15:44,623 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 17:15:44,624 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 17:15:44,624 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 17:15:44,624 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 17:15:44,624 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 17:15:44,624 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 17:15:44,625 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 17:15:44,625 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 17:15:44,627 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 17:15:44,627 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 17:15:44,627 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 17:15:44,628 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 17:15:44,628 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 17:15:44,628 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 17:15:44,628 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 17:15:44,628 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 17:15:44,629 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 17:15:44,629 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 17:15:44,629 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 17:15:44,630 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 17:15:44,630 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 17:15:44,630 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 17:15:44,630 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 17:15:44,631 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 17:15:44,631 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 17:15:44,632 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 17:15:44,632 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 17:15:45,083 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 17:15:45,118 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 17:15:45,121 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 17:15:45,122 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 17:15:45,123 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 17:15:45,124 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/afterrec-1.c [2020-10-28 17:15:45,198 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f5c6f8d4a/28bebb9827464f548f0a0d0e1f831bc4/FLAGb85fcd2ab [2020-10-28 17:15:45,808 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 17:15:45,809 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/afterrec-1.c [2020-10-28 17:15:45,816 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f5c6f8d4a/28bebb9827464f548f0a0d0e1f831bc4/FLAGb85fcd2ab [2020-10-28 17:15:46,139 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f5c6f8d4a/28bebb9827464f548f0a0d0e1f831bc4 [2020-10-28 17:15:46,143 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 17:15:46,150 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 17:15:46,152 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 17:15:46,153 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 17:15:46,157 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 17:15:46,157 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 05:15:46" (1/1) ... [2020-10-28 17:15:46,161 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@431ca9e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:15:46, skipping insertion in model container [2020-10-28 17:15:46,162 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 05:15:46" (1/1) ... [2020-10-28 17:15:46,172 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 17:15:46,187 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 17:15:46,330 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 17:15:46,341 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 17:15:46,356 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 17:15:46,372 INFO L208 MainTranslator]: Completed translation [2020-10-28 17:15:46,373 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:15:46 WrapperNode [2020-10-28 17:15:46,373 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 17:15:46,374 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 17:15:46,375 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 17:15:46,375 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 17:15:46,388 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:15:46" (1/1) ... [2020-10-28 17:15:46,388 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:15:46" (1/1) ... [2020-10-28 17:15:46,396 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:15:46" (1/1) ... [2020-10-28 17:15:46,396 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:15:46" (1/1) ... [2020-10-28 17:15:46,401 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:15:46" (1/1) ... [2020-10-28 17:15:46,402 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:15:46" (1/1) ... [2020-10-28 17:15:46,404 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:15:46" (1/1) ... [2020-10-28 17:15:46,405 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 17:15:46,406 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 17:15:46,407 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 17:15:46,407 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 17:15:46,408 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:15:46" (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 [2020-10-28 17:15:46,474 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 17:15:46,474 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 17:15:46,475 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 17:15:46,475 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2020-10-28 17:15:46,475 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 17:15:46,475 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 17:15:46,475 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 17:15:46,475 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 17:15:46,475 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 17:15:46,476 INFO L130 BoogieDeclarations]: Found specification of procedure f [2020-10-28 17:15:46,476 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 17:15:46,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 17:15:46,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 17:15:46,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 17:15:46,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 17:15:46,476 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 17:15:46,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 17:15:46,841 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 17:15:46,842 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 17:15:46,844 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 05:15:46 BoogieIcfgContainer [2020-10-28 17:15:46,844 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 17:15:46,849 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 17:15:46,849 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 17:15:46,857 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 17:15:46,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 05:15:46" (1/3) ... [2020-10-28 17:15:46,861 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dd13e34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 05:15:46, skipping insertion in model container [2020-10-28 17:15:46,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:15:46" (2/3) ... [2020-10-28 17:15:46,862 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dd13e34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 05:15:46, skipping insertion in model container [2020-10-28 17:15:46,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 05:15:46" (3/3) ... [2020-10-28 17:15:46,867 INFO L111 eAbstractionObserver]: Analyzing ICFG afterrec-1.c [2020-10-28 17:15:46,900 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 17:15:46,912 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 17:15:46,939 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 17:15:46,970 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 17:15:46,970 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 17:15:46,971 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 17:15:46,971 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 17:15:46,971 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 17:15:46,971 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 17:15:46,971 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 17:15:46,972 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 17:15:46,992 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-10-28 17:15:46,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-28 17:15:46,998 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:15:46,999 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 17:15:47,000 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:15:47,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:15:47,008 INFO L82 PathProgramCache]: Analyzing trace with hash -56492575, now seen corresponding path program 1 times [2020-10-28 17:15:47,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:15:47,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1024577721] [2020-10-28 17:15:47,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:15:47,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:15:47,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:15:47,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:15:47,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 17:15:47,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:15:47,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 342 [2020-10-28 17:15:47,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:15:47,532 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:15:47,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 17:15:47,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 17:15:47,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 17:15:47,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 17:15:47,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:15:47,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:15:47,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:15:47,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:15:47,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:15:47,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:15:47,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-28 17:15:47,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:15:47,772 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:15:47,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:15:47,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:15:47,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:15:47,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 17:15:47,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 17:15:47,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:15:47,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:15:47,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:15:47,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 17:15:47,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:15:47,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-28 17:15:47,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:15:47,827 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:15:47,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 17:15:47,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 17:15:47,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 17:15:47,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 17:15:47,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 17:15:47,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1024577721] [2020-10-28 17:15:47,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 17:15:47,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 17:15:47,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368005234] [2020-10-28 17:15:47,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 17:15:47,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:15:47,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 17:15:47,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 17:15:47,916 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 8 states. [2020-10-28 17:15:48,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:15:48,258 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2020-10-28 17:15:48,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 17:15:48,260 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2020-10-28 17:15:48,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:15:48,270 INFO L225 Difference]: With dead ends: 29 [2020-10-28 17:15:48,270 INFO L226 Difference]: Without dead ends: 17 [2020-10-28 17:15:48,274 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-28 17:15:48,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-28 17:15:48,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-28 17:15:48,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-28 17:15:48,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-10-28 17:15:48,340 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2020-10-28 17:15:48,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:15:48,341 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-10-28 17:15:48,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 17:15:48,342 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-10-28 17:15:48,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 17:15:48,344 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:15:48,345 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 17:15:48,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 17:15:48,346 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:15:48,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:15:48,348 INFO L82 PathProgramCache]: Analyzing trace with hash 900577825, now seen corresponding path program 2 times [2020-10-28 17:15:48,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:15:48,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1912287483] [2020-10-28 17:15:48,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:15:48,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:15:48,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:15:48,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:15:48,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 17:15:48,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:15:48,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 303 [2020-10-28 17:15:48,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:15:48,699 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:15:48,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 17:15:48,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 17:15:48,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 17:15:48,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 17:15:48,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:15:48,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:15:48,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:15:48,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:15:48,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:15:48,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:15:48,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 17:15:48,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:15:48,827 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:15:48,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:15:48,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:15:48,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:15:48,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 17:15:48,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-28 17:15:48,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:15:48,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:15:48,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:15:48,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 17:15:48,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:15:48,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 17:15:48,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:15:48,846 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:15:48,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:15:48,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 17:15:48,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:15:48,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 17:15:48,854 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 17:15:48,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1912287483] [2020-10-28 17:15:48,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 17:15:48,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 17:15:48,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840993364] [2020-10-28 17:15:48,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 17:15:48,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:15:48,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 17:15:48,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-28 17:15:48,864 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2020-10-28 17:15:49,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:15:49,191 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-10-28 17:15:49,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 17:15:49,192 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-10-28 17:15:49,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:15:49,193 INFO L225 Difference]: With dead ends: 29 [2020-10-28 17:15:49,193 INFO L226 Difference]: Without dead ends: 19 [2020-10-28 17:15:49,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2020-10-28 17:15:49,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-28 17:15:49,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-28 17:15:49,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-28 17:15:49,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 18 transitions. [2020-10-28 17:15:49,203 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 18 transitions. Word has length 21 [2020-10-28 17:15:49,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:15:49,203 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 18 transitions. [2020-10-28 17:15:49,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 17:15:49,203 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 18 transitions. [2020-10-28 17:15:49,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-28 17:15:49,204 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:15:49,204 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 17:15:49,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 17:15:49,205 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:15:49,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:15:49,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1335781737, now seen corresponding path program 3 times [2020-10-28 17:15:49,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:15:49,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1699321007] [2020-10-28 17:15:49,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:15:49,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-28 17:15:49,221 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-28 17:15:49,221 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-28 17:15:49,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 17:15:49,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 05:15:49 BoogieIcfgContainer [2020-10-28 17:15:49,249 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-28 17:15:49,252 INFO L168 Benchmark]: Toolchain (without parser) took 3106.07 ms. Allocated memory was 151.0 MB in the beginning and 182.5 MB in the end (delta: 31.5 MB). Free memory was 126.8 MB in the beginning and 165.7 MB in the end (delta: -38.9 MB). Peak memory consumption was 78.6 MB. Max. memory is 8.0 GB. [2020-10-28 17:15:49,253 INFO L168 Benchmark]: CDTParser took 0.43 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. [2020-10-28 17:15:49,254 INFO L168 Benchmark]: CACSL2BoogieTranslator took 221.49 ms. Allocated memory is still 151.0 MB. Free memory was 126.2 MB in the beginning and 117.4 MB in the end (delta: 8.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-10-28 17:15:49,255 INFO L168 Benchmark]: Boogie Preprocessor took 31.02 ms. Allocated memory is still 151.0 MB. Free memory was 117.4 MB in the beginning and 116.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-28 17:15:49,256 INFO L168 Benchmark]: RCFGBuilder took 437.73 ms. Allocated memory is still 151.0 MB. Free memory was 116.0 MB in the beginning and 104.2 MB in the end (delta: 11.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-10-28 17:15:49,257 INFO L168 Benchmark]: TraceAbstraction took 2400.38 ms. Allocated memory was 151.0 MB in the beginning and 182.5 MB in the end (delta: 31.5 MB). Free memory was 103.8 MB in the beginning and 165.7 MB in the end (delta: -61.9 MB). Peak memory consumption was 55.5 MB. Max. memory is 8.0 GB. [2020-10-28 17:15:49,261 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.43 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 221.49 ms. Allocated memory is still 151.0 MB. Free memory was 126.2 MB in the beginning and 117.4 MB in the end (delta: 8.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 31.02 ms. Allocated memory is still 151.0 MB. Free memory was 117.4 MB in the beginning and 116.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 437.73 ms. Allocated memory is still 151.0 MB. Free memory was 116.0 MB in the beginning and 104.2 MB in the end (delta: 11.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2400.38 ms. Allocated memory was 151.0 MB in the beginning and 182.5 MB in the end (delta: 31.5 MB). Free memory was 103.8 MB in the beginning and 165.7 MB in the end (delta: -61.9 MB). Peak memory consumption was 55.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L13] CALL f(4) [L6] COND FALSE !(n<3) [L7] n-- [L8] CALL f(n) [L6] COND FALSE !(n<3) [L7] n-- [L8] CALL f(n) [L6] COND TRUE n<3 [L8] RET f(n) [L9] CALL reach_error() [L3] __assert_fail("0", "afterrec-1.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.2s, OverallIterations: 3, TraceHistogramMax: 4, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 20 SDtfs, 26 SDslu, 42 SDs, 0 SdLazy, 71 SolverSat, 26 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 54 NumberOfCodeBlocks, 54 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 34 ConstructedInterpolants, 0 QuantifiedInterpolants, 2104 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 0 PerfectInterpolantSequences, 9/17 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...