/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-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 17:15:54,312 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 17:15:54,315 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 17:15:54,353 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 17:15:54,354 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 17:15:54,355 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 17:15:54,357 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 17:15:54,359 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 17:15:54,361 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 17:15:54,362 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 17:15:54,363 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 17:15:54,365 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 17:15:54,365 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 17:15:54,367 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 17:15:54,368 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 17:15:54,369 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 17:15:54,370 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 17:15:54,371 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 17:15:54,373 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 17:15:54,375 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 17:15:54,377 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 17:15:54,383 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 17:15:54,385 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 17:15:54,385 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 17:15:54,389 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 17:15:54,392 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 17:15:54,392 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 17:15:54,394 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 17:15:54,396 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 17:15:54,397 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 17:15:54,397 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 17:15:54,398 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 17:15:54,399 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 17:15:54,403 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 17:15:54,407 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 17:15:54,408 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 17:15:54,409 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 17:15:54,409 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 17:15:54,410 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 17:15:54,411 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 17:15:54,412 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 17:15:54,413 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 17:15:54,472 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 17:15:54,473 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 17:15:54,475 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 17:15:54,476 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 17:15:54,476 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 17:15:54,477 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 17:15:54,477 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 17:15:54,477 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 17:15:54,477 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 17:15:54,478 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 17:15:54,478 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 17:15:54,478 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 17:15:54,479 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 17:15:54,479 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 17:15:54,480 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 17:15:54,480 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 17:15:54,480 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 17:15:54,480 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 17:15:54,481 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 17:15:54,481 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 17:15:54,481 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 17:15:54,481 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 17:15:54,481 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 17:15:54,482 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 17:15:54,482 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 17:15:54,482 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 17:15:54,482 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 17:15:54,482 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 17:15:54,482 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 17:15:54,483 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 17:15:54,940 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 17:15:54,984 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 17:15:54,988 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 17:15:54,989 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 17:15:54,990 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 17:15:54,992 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/afterrec-2.c [2020-10-28 17:15:55,080 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/43f5b22b0/7a78590f21a947f0ba1b931127e31818/FLAG8cc393dd0 [2020-10-28 17:15:55,726 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 17:15:55,726 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/afterrec-2.c [2020-10-28 17:15:55,733 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/43f5b22b0/7a78590f21a947f0ba1b931127e31818/FLAG8cc393dd0 [2020-10-28 17:15:56,102 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/43f5b22b0/7a78590f21a947f0ba1b931127e31818 [2020-10-28 17:15:56,106 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 17:15:56,116 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 17:15:56,118 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 17:15:56,119 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 17:15:56,124 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 17:15:56,125 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 05:15:56" (1/1) ... [2020-10-28 17:15:56,131 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@294322b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:15:56, skipping insertion in model container [2020-10-28 17:15:56,131 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 05:15:56" (1/1) ... [2020-10-28 17:15:56,140 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 17:15:56,158 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 17:15:56,351 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 17:15:56,363 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 17:15:56,378 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 17:15:56,394 INFO L208 MainTranslator]: Completed translation [2020-10-28 17:15:56,395 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:15:56 WrapperNode [2020-10-28 17:15:56,395 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 17:15:56,396 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 17:15:56,397 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 17:15:56,397 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 17:15:56,410 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:15:56" (1/1) ... [2020-10-28 17:15:56,410 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:15:56" (1/1) ... [2020-10-28 17:15:56,417 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:15:56" (1/1) ... [2020-10-28 17:15:56,418 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:15:56" (1/1) ... [2020-10-28 17:15:56,422 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:15:56" (1/1) ... [2020-10-28 17:15:56,424 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:15:56" (1/1) ... [2020-10-28 17:15:56,425 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:15:56" (1/1) ... [2020-10-28 17:15:56,427 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 17:15:56,428 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 17:15:56,428 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 17:15:56,428 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 17:15:56,429 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:15:56" (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 17:15:56,521 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 17:15:56,521 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 17:15:56,521 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 17:15:56,521 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2020-10-28 17:15:56,522 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 17:15:56,522 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 17:15:56,522 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 17:15:56,522 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 17:15:56,522 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 17:15:56,522 INFO L130 BoogieDeclarations]: Found specification of procedure f [2020-10-28 17:15:56,523 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 17:15:56,523 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 17:15:56,523 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 17:15:56,523 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 17:15:56,523 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 17:15:56,523 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 17:15:56,524 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 17:15:56,744 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 17:15:56,745 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 17:15:56,746 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 05:15:56 BoogieIcfgContainer [2020-10-28 17:15:56,747 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 17:15:56,749 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 17:15:56,749 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 17:15:56,752 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 17:15:56,753 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 05:15:56" (1/3) ... [2020-10-28 17:15:56,754 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52162f46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 05:15:56, skipping insertion in model container [2020-10-28 17:15:56,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:15:56" (2/3) ... [2020-10-28 17:15:56,754 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52162f46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 05:15:56, skipping insertion in model container [2020-10-28 17:15:56,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 05:15:56" (3/3) ... [2020-10-28 17:15:56,756 INFO L111 eAbstractionObserver]: Analyzing ICFG afterrec-2.c [2020-10-28 17:15:56,769 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 17:15:56,774 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 17:15:56,789 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 17:15:56,832 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 17:15:56,833 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 17:15:56,833 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 17:15:56,833 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 17:15:56,833 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 17:15:56,834 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 17:15:56,837 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 17:15:56,837 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 17:15:56,885 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-10-28 17:15:56,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-28 17:15:56,895 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:15:56,898 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 17:15:56,899 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:15:56,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:15:56,917 INFO L82 PathProgramCache]: Analyzing trace with hash -56492575, now seen corresponding path program 1 times [2020-10-28 17:15:56,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:15:56,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1945297876] [2020-10-28 17:15:56,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:15:57,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:15:57,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:15:57,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:15:57,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 17:15:57,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:15:57,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 258 [2020-10-28 17:15:57,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:15:57,349 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:15:57,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 17:15:57,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 17:15:57,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 17:15:57,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 17:15:57,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:15:57,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:15:57,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:15:57,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:15:57,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:15:57,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:15:57,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 17:15:57,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:15:57,480 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:15:57,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:15:57,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:15:57,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:15:57,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 17:15:57,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 17:15:57,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:15:57,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:15:57,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:15:57,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 17:15:57,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:15:57,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 17:15:57,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:15:57,511 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:15:57,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:15:57,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 17:15:57,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:15:57,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 17:15:57,522 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 17:15:57,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1945297876] [2020-10-28 17:15:57,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 17:15:57,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 17:15:57,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744531549] [2020-10-28 17:15:57,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 17:15:57,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:15:57,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 17:15:57,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 17:15:57,557 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 5 states. [2020-10-28 17:15:57,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:15:57,708 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2020-10-28 17:15:57,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 17:15:57,710 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-10-28 17:15:57,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:15:57,717 INFO L225 Difference]: With dead ends: 29 [2020-10-28 17:15:57,718 INFO L226 Difference]: Without dead ends: 0 [2020-10-28 17:15:57,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 17:15:57,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-28 17:15:57,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-28 17:15:57,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-28 17:15:57,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-28 17:15:57,752 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2020-10-28 17:15:57,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:15:57,752 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-28 17:15:57,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 17:15:57,753 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-28 17:15:57,753 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-28 17:15:57,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 17:15:57,755 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-28 17:15:57,883 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2020-10-28 17:15:57,883 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 3) the Hoare annotation is: true [2020-10-28 17:15:57,883 INFO L274 CegarLoopResult]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2020-10-28 17:15:57,884 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-28 17:15:57,884 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-28 17:15:57,885 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|)) [2020-10-28 17:15:57,885 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-28 17:15:57,885 INFO L274 CegarLoopResult]: For program point L9(line 9) no Hoare annotation was computed. [2020-10-28 17:15:57,886 INFO L270 CegarLoopResult]: At program point L8(line 8) the Hoare annotation is: (not (<= |f_#in~n| 2)) [2020-10-28 17:15:57,886 INFO L274 CegarLoopResult]: For program point fEXIT(lines 5 10) no Hoare annotation was computed. [2020-10-28 17:15:57,886 INFO L270 CegarLoopResult]: At program point L8-1(lines 5 10) the Hoare annotation is: (not (<= |f_#in~n| 2)) [2020-10-28 17:15:57,886 INFO L274 CegarLoopResult]: For program point L6(line 6) no Hoare annotation was computed. [2020-10-28 17:15:57,886 INFO L277 CegarLoopResult]: At program point fENTRY(lines 5 10) the Hoare annotation is: true [2020-10-28 17:15:57,886 INFO L274 CegarLoopResult]: For program point fFINAL(lines 5 10) no Hoare annotation was computed. [2020-10-28 17:15:57,886 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-28 17:15:57,887 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-28 17:15:57,887 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-28 17:15:57,890 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-28 17:15:57,890 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 12 14) the Hoare annotation is: true [2020-10-28 17:15:57,890 INFO L274 CegarLoopResult]: For program point mainFINAL(lines 12 14) no Hoare annotation was computed. [2020-10-28 17:15:57,890 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 12 14) no Hoare annotation was computed. [2020-10-28 17:15:57,900 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 05:15:57 BoogieIcfgContainer [2020-10-28 17:15:57,900 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-28 17:15:57,906 INFO L168 Benchmark]: Toolchain (without parser) took 1793.59 ms. Allocated memory was 125.8 MB in the beginning and 168.8 MB in the end (delta: 43.0 MB). Free memory was 101.4 MB in the beginning and 101.6 MB in the end (delta: -217.4 kB). Peak memory consumption was 43.9 MB. Max. memory is 8.0 GB. [2020-10-28 17:15:57,912 INFO L168 Benchmark]: CDTParser took 0.57 ms. Allocated memory is still 125.8 MB. Free memory is still 85.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-28 17:15:57,915 INFO L168 Benchmark]: CACSL2BoogieTranslator took 277.20 ms. Allocated memory is still 125.8 MB. Free memory was 100.7 MB in the beginning and 91.9 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-10-28 17:15:57,917 INFO L168 Benchmark]: Boogie Preprocessor took 30.74 ms. Allocated memory is still 125.8 MB. Free memory was 91.9 MB in the beginning and 90.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-28 17:15:57,918 INFO L168 Benchmark]: RCFGBuilder took 318.84 ms. Allocated memory is still 125.8 MB. Free memory was 90.6 MB in the beginning and 79.2 MB in the end (delta: 11.4 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2020-10-28 17:15:57,921 INFO L168 Benchmark]: TraceAbstraction took 1151.92 ms. Allocated memory was 125.8 MB in the beginning and 168.8 MB in the end (delta: 43.0 MB). Free memory was 78.9 MB in the beginning and 101.6 MB in the end (delta: -22.7 MB). Peak memory consumption was 21.8 MB. Max. memory is 8.0 GB. [2020-10-28 17:15:57,928 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.57 ms. Allocated memory is still 125.8 MB. Free memory is still 85.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 277.20 ms. Allocated memory is still 125.8 MB. Free memory was 100.7 MB in the beginning and 91.9 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 30.74 ms. Allocated memory is still 125.8 MB. Free memory was 91.9 MB in the beginning and 90.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 318.84 ms. Allocated memory is still 125.8 MB. Free memory was 90.6 MB in the beginning and 79.2 MB in the end (delta: 11.4 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1151.92 ms. Allocated memory was 125.8 MB in the beginning and 168.8 MB in the end (delta: 43.0 MB). Free memory was 78.9 MB in the beginning and 101.6 MB in the end (delta: -22.7 MB). Peak memory consumption was 21.8 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.9s, OverallIterations: 1, TraceHistogramMax: 2, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 9 SDtfs, 9 SDslu, 16 SDs, 0 SdLazy, 12 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 11 PreInvPairs, 11 NumberOfFragments, 44 HoareAnnotationTreeSize, 11 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 68 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 15 NumberOfCodeBlocks, 15 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 14 ConstructedInterpolants, 0 QuantifiedInterpolants, 672 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 0 PerfectInterpolantSequences, 0/2 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...