/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/sum_2x3-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 13:25:20,954 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 13:25:20,958 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 13:25:20,992 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 13:25:20,992 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 13:25:20,993 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 13:25:20,995 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 13:25:20,997 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 13:25:20,998 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 13:25:21,000 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 13:25:21,001 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 13:25:21,002 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 13:25:21,003 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 13:25:21,004 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 13:25:21,005 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 13:25:21,006 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 13:25:21,007 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 13:25:21,008 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 13:25:21,010 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 13:25:21,012 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 13:25:21,014 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 13:25:21,015 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 13:25:21,017 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 13:25:21,018 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 13:25:21,020 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 13:25:21,020 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 13:25:21,021 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 13:25:21,022 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 13:25:21,022 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 13:25:21,023 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 13:25:21,024 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 13:25:21,025 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 13:25:21,025 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 13:25:21,026 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 13:25:21,028 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 13:25:21,028 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 13:25:21,029 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 13:25:21,029 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 13:25:21,029 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 13:25:21,030 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 13:25:21,031 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 13:25:21,032 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 [2020-09-25 13:25:21,058 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 13:25:21,059 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 13:25:21,060 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 13:25:21,060 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 13:25:21,061 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 13:25:21,061 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 13:25:21,061 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 13:25:21,061 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 13:25:21,061 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 13:25:21,062 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 13:25:21,062 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 13:25:21,062 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 13:25:21,062 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 13:25:21,062 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 13:25:21,063 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 13:25:21,063 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 13:25:21,063 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 13:25:21,063 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 13:25:21,063 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 13:25:21,064 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 13:25:21,064 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 13:25:21,064 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 13:25:21,064 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 13:25:21,064 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 13:25:21,065 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 13:25:21,065 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 13:25:21,065 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 13:25:21,065 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 13:25:21,065 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 13:25:21,066 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; [2020-09-25 13:25:21,596 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 13:25:21,619 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 13:25:21,627 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 13:25:21,629 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 13:25:21,630 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 13:25:21,631 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_2x3-1.c [2020-09-25 13:25:21,707 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/776dce498/425581eea38a4d03b6d340f94bbcd519/FLAG1879caf12 [2020-09-25 13:25:22,220 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 13:25:22,221 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/sum_2x3-1.c [2020-09-25 13:25:22,229 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/776dce498/425581eea38a4d03b6d340f94bbcd519/FLAG1879caf12 [2020-09-25 13:25:22,562 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/776dce498/425581eea38a4d03b6d340f94bbcd519 [2020-09-25 13:25:22,577 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 13:25:22,584 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 13:25:22,585 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 13:25:22,585 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 13:25:22,590 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 13:25:22,591 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 01:25:22" (1/1) ... [2020-09-25 13:25:22,596 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45aac576 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:25:22, skipping insertion in model container [2020-09-25 13:25:22,597 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 01:25:22" (1/1) ... [2020-09-25 13:25:22,607 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 13:25:22,632 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 13:25:22,890 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 13:25:22,896 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 13:25:22,912 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 13:25:22,930 INFO L208 MainTranslator]: Completed translation [2020-09-25 13:25:22,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:25:22 WrapperNode [2020-09-25 13:25:22,931 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 13:25:22,932 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 13:25:22,932 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 13:25:22,933 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 13:25:22,947 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:25:22" (1/1) ... [2020-09-25 13:25:22,947 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:25:22" (1/1) ... [2020-09-25 13:25:23,036 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:25:22" (1/1) ... [2020-09-25 13:25:23,036 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:25:22" (1/1) ... [2020-09-25 13:25:23,047 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:25:22" (1/1) ... [2020-09-25 13:25:23,050 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:25:22" (1/1) ... [2020-09-25 13:25:23,051 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:25:22" (1/1) ... [2020-09-25 13:25:23,054 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 13:25:23,055 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 13:25:23,055 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 13:25:23,055 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 13:25:23,056 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:25:22" (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 [2020-09-25 13:25:23,136 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 13:25:23,136 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 13:25:23,136 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-09-25 13:25:23,136 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 13:25:23,137 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 13:25:23,137 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-09-25 13:25:23,137 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 13:25:23,137 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 13:25:23,138 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 13:25:23,450 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 13:25:23,450 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 13:25:23,455 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 01:25:23 BoogieIcfgContainer [2020-09-25 13:25:23,456 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 13:25:23,466 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 13:25:23,468 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 13:25:23,472 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 13:25:23,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 01:25:22" (1/3) ... [2020-09-25 13:25:23,473 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f0a1469 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 01:25:23, skipping insertion in model container [2020-09-25 13:25:23,474 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:25:22" (2/3) ... [2020-09-25 13:25:23,475 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f0a1469 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 01:25:23, skipping insertion in model container [2020-09-25 13:25:23,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 01:25:23" (3/3) ... [2020-09-25 13:25:23,478 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_2x3-1.c [2020-09-25 13:25:23,490 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 13:25:23,502 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 13:25:23,524 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 13:25:23,554 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 13:25:23,554 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 13:25:23,554 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 13:25:23,555 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 13:25:23,555 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 13:25:23,555 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 13:25:23,555 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 13:25:23,555 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 13:25:23,575 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-09-25 13:25:23,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-25 13:25:23,582 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:25:23,583 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 13:25:23,584 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:25:23,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:25:23,590 INFO L82 PathProgramCache]: Analyzing trace with hash 989240825, now seen corresponding path program 1 times [2020-09-25 13:25:23,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:25:23,600 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2087385825] [2020-09-25 13:25:23,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:25:23,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:25:23,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:25:23,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:25:24,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:25:24,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 13:25:24,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 13:25:24,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 327 [2020-09-25 13:25:24,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:25:24,058 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:25:24,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 13:25:24,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 13:25:24,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-25 13:25:24,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 13:25:24,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:25:24,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:25:24,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:25:24,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:25:24,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 13:25:24,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:25:24,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 13:25:24,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:25:24,177 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:25:24,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:25:24,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:25:24,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:25:24,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:25:24,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-25 13:25:24,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:25:24,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:25:24,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:25:24,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:25:24,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 13:25:24,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 13:25:24,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-09-25 13:25:24,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:25:24,248 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:25:24,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 13:25:24,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 13:25:24,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 13:25:24,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:25:24,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 13:25:24,313 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2087385825] [2020-09-25 13:25:24,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 13:25:24,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-25 13:25:24,317 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976207553] [2020-09-25 13:25:24,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 13:25:24,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:25:24,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 13:25:24,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-25 13:25:24,345 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 7 states. [2020-09-25 13:25:24,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:25:24,502 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2020-09-25 13:25:24,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 13:25:24,504 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-09-25 13:25:24,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:25:24,517 INFO L225 Difference]: With dead ends: 39 [2020-09-25 13:25:24,517 INFO L226 Difference]: Without dead ends: 25 [2020-09-25 13:25:24,522 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-25 13:25:24,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-09-25 13:25:24,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-09-25 13:25:24,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-09-25 13:25:24,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-09-25 13:25:24,577 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 18 [2020-09-25 13:25:24,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:25:24,577 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-09-25 13:25:24,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 13:25:24,578 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-09-25 13:25:24,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-25 13:25:24,580 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:25:24,581 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 13:25:24,581 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 13:25:24,581 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:25:24,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:25:24,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1852726759, now seen corresponding path program 1 times [2020-09-25 13:25:24,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:25:24,582 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [134843468] [2020-09-25 13:25:24,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:25:24,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:25:24,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:25:24,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:25:25,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:25:25,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-09-25 13:25:25,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 13:25:25,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 482 [2020-09-25 13:25:25,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:25:25,082 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:25:25,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 13:25:25,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 13:25:25,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-25 13:25:25,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:25:25,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:25:25,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:25:25,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:25:25,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:25:25,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 13:25:25,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:25:25,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 13:25:25,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:25:25,151 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:25:25,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:25:25,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:25:25,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:25:25,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:25:25,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-25 13:25:25,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:25:25,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:25:25,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:25:25,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:25:25,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-25 13:25:25,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 13:25:25,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 123 [2020-09-25 13:25:25,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:25:25,285 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:25:25,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 13:25:25,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 13:25:25,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-25 13:25:25,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:25:25,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-25 13:25:25,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:25:25,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:25:25,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:25:25,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 13:25:25,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:25:25,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-09-25 13:25:25,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:25:25,338 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:25:25,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 13:25:25,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:25:25,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 13:25:25,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:25:25,358 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-25 13:25:25,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [134843468] [2020-09-25 13:25:25,359 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 13:25:25,359 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 13:25:25,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965344981] [2020-09-25 13:25:25,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 13:25:25,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:25:25,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 13:25:25,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-25 13:25:25,363 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 8 states. [2020-09-25 13:25:25,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:25:25,455 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2020-09-25 13:25:25,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 13:25:25,456 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-09-25 13:25:25,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:25:25,457 INFO L225 Difference]: With dead ends: 36 [2020-09-25 13:25:25,458 INFO L226 Difference]: Without dead ends: 30 [2020-09-25 13:25:25,459 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-25 13:25:25,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-09-25 13:25:25,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-09-25 13:25:25,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-09-25 13:25:25,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-09-25 13:25:25,467 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 27 [2020-09-25 13:25:25,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:25:25,468 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-09-25 13:25:25,468 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 13:25:25,468 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-09-25 13:25:25,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-25 13:25:25,470 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:25:25,470 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 13:25:25,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 13:25:25,471 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:25:25,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:25:25,471 INFO L82 PathProgramCache]: Analyzing trace with hash -175020829, now seen corresponding path program 2 times [2020-09-25 13:25:25,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:25:25,472 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1426050497] [2020-09-25 13:25:25,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:25:25,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 13:25:25,487 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 13:25:25,488 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 13:25:25,495 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 13:25:25,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 01:25:25 BoogieIcfgContainer [2020-09-25 13:25:25,523 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 13:25:25,528 INFO L168 Benchmark]: Toolchain (without parser) took 2946.49 ms. Allocated memory was 139.5 MB in the beginning and 234.9 MB in the end (delta: 95.4 MB). Free memory was 103.0 MB in the beginning and 165.9 MB in the end (delta: -62.9 MB). Peak memory consumption was 32.5 MB. Max. memory is 7.1 GB. [2020-09-25 13:25:25,529 INFO L168 Benchmark]: CDTParser took 0.51 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-25 13:25:25,530 INFO L168 Benchmark]: CACSL2BoogieTranslator took 346.58 ms. Allocated memory is still 139.5 MB. Free memory was 102.3 MB in the beginning and 92.7 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-09-25 13:25:25,532 INFO L168 Benchmark]: Boogie Preprocessor took 122.49 ms. Allocated memory was 139.5 MB in the beginning and 201.3 MB in the end (delta: 61.9 MB). Free memory was 92.7 MB in the beginning and 180.4 MB in the end (delta: -87.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-09-25 13:25:25,533 INFO L168 Benchmark]: RCFGBuilder took 400.91 ms. Allocated memory is still 201.3 MB. Free memory was 180.4 MB in the beginning and 167.9 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-09-25 13:25:25,534 INFO L168 Benchmark]: TraceAbstraction took 2057.11 ms. Allocated memory was 201.3 MB in the beginning and 234.9 MB in the end (delta: 33.6 MB). Free memory was 167.9 MB in the beginning and 165.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 35.5 MB. Max. memory is 7.1 GB. [2020-09-25 13:25:25,539 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.51 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 346.58 ms. Allocated memory is still 139.5 MB. Free memory was 102.3 MB in the beginning and 92.7 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 122.49 ms. Allocated memory was 139.5 MB in the beginning and 201.3 MB in the end (delta: 61.9 MB). Free memory was 92.7 MB in the beginning and 180.4 MB in the end (delta: -87.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 400.91 ms. Allocated memory is still 201.3 MB. Free memory was 180.4 MB in the beginning and 167.9 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2057.11 ms. Allocated memory was 201.3 MB in the beginning and 234.9 MB in the end (delta: 33.6 MB). Free memory was 167.9 MB in the beginning and 165.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 35.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 16]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int a = 2; [L13] int b = 3; [L14] CALL, EXPR sum(a, b) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND TRUE n <= 0 [L5] return m + n; [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L14] RET, EXPR sum(a, b) [L14] int result = sum(a, b); [L15] COND TRUE result == a + b [L16] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.9s, OverallIterations: 3, TraceHistogramMax: 3, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 39 SDtfs, 33 SDslu, 119 SDs, 0 SdLazy, 83 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=2, 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, 1.3s InterpolantComputationTime, 81 NumberOfCodeBlocks, 81 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 43 ConstructedInterpolants, 0 QuantifiedInterpolants, 3155 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 1 PerfectInterpolantSequences, 3/5 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...