/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_i5_o5-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-15 02:10:28,414 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-15 02:10:28,417 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-15 02:10:28,458 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-15 02:10:28,459 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-15 02:10:28,466 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-15 02:10:28,469 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-15 02:10:28,472 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-15 02:10:28,474 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-15 02:10:28,477 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-15 02:10:28,478 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-15 02:10:28,479 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-15 02:10:28,479 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-15 02:10:28,481 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-15 02:10:28,484 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-15 02:10:28,485 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-15 02:10:28,487 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-15 02:10:28,488 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-15 02:10:28,490 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-15 02:10:28,499 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-15 02:10:28,501 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-15 02:10:28,502 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-15 02:10:28,503 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-15 02:10:28,504 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-15 02:10:28,519 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-15 02:10:28,519 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-15 02:10:28,520 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-15 02:10:28,521 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-15 02:10:28,521 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-15 02:10:28,525 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-15 02:10:28,525 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-15 02:10:28,526 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-15 02:10:28,527 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-15 02:10:28,529 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-15 02:10:28,530 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-15 02:10:28,531 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-15 02:10:28,531 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-15 02:10:28,531 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-15 02:10:28,532 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-15 02:10:28,536 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-15 02:10:28,536 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-15 02:10:28,538 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 [2020-10-15 02:10:28,560 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-15 02:10:28,560 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-15 02:10:28,561 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-15 02:10:28,562 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-15 02:10:28,562 INFO L138 SettingsManager]: * Use SBE=true [2020-10-15 02:10:28,562 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-15 02:10:28,562 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-15 02:10:28,563 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-15 02:10:28,563 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-15 02:10:28,563 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-15 02:10:28,563 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-15 02:10:28,563 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-15 02:10:28,563 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-15 02:10:28,564 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-15 02:10:28,564 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-15 02:10:28,564 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-15 02:10:28,564 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-15 02:10:28,565 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-15 02:10:28,565 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-15 02:10:28,565 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-15 02:10:28,565 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-15 02:10:28,565 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 02:10:28,566 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-15 02:10:28,566 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-15 02:10:28,566 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-15 02:10:28,566 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-15 02:10:28,566 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-15 02:10:28,566 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-15 02:10:28,567 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-15 02:10:28,567 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-15 02:10:28,849 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-15 02:10:28,862 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-15 02:10:28,866 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-15 02:10:28,867 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-15 02:10:28,868 INFO L275 PluginConnector]: CDTParser initialized [2020-10-15 02:10:28,868 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i5_o5-1.c [2020-10-15 02:10:28,939 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4c3655e52/f9b49ca6d7304639b501e9647af7dcbb/FLAG433fd1f8e [2020-10-15 02:10:29,405 INFO L306 CDTParser]: Found 1 translation units. [2020-10-15 02:10:29,405 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id_i5_o5-1.c [2020-10-15 02:10:29,412 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4c3655e52/f9b49ca6d7304639b501e9647af7dcbb/FLAG433fd1f8e [2020-10-15 02:10:29,910 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4c3655e52/f9b49ca6d7304639b501e9647af7dcbb [2020-10-15 02:10:29,920 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-15 02:10:29,922 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-15 02:10:29,925 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-15 02:10:29,925 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-15 02:10:29,929 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-15 02:10:29,930 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 02:10:29" (1/1) ... [2020-10-15 02:10:29,934 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20955f5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:10:29, skipping insertion in model container [2020-10-15 02:10:29,934 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 02:10:29" (1/1) ... [2020-10-15 02:10:29,943 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-15 02:10:29,960 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-15 02:10:30,151 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 02:10:30,155 INFO L203 MainTranslator]: Completed pre-run [2020-10-15 02:10:30,166 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 02:10:30,177 INFO L208 MainTranslator]: Completed translation [2020-10-15 02:10:30,178 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:10:30 WrapperNode [2020-10-15 02:10:30,178 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-15 02:10:30,179 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-15 02:10:30,179 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-15 02:10:30,179 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-15 02:10:30,189 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:10:30" (1/1) ... [2020-10-15 02:10:30,189 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:10:30" (1/1) ... [2020-10-15 02:10:30,194 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:10:30" (1/1) ... [2020-10-15 02:10:30,194 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:10:30" (1/1) ... [2020-10-15 02:10:30,197 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:10:30" (1/1) ... [2020-10-15 02:10:30,199 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:10:30" (1/1) ... [2020-10-15 02:10:30,200 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:10:30" (1/1) ... [2020-10-15 02:10:30,201 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-15 02:10:30,202 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-15 02:10:30,202 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-15 02:10:30,202 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-15 02:10:30,203 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:10:30" (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 [2020-10-15 02:10:30,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-15 02:10:30,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-15 02:10:30,344 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-10-15 02:10:30,344 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-15 02:10:30,344 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-15 02:10:30,344 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-15 02:10:30,344 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-10-15 02:10:30,344 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-15 02:10:30,344 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-15 02:10:30,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-15 02:10:30,500 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-15 02:10:30,500 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-15 02:10:30,503 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 02:10:30 BoogieIcfgContainer [2020-10-15 02:10:30,503 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-15 02:10:30,505 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-15 02:10:30,505 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-15 02:10:30,508 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-15 02:10:30,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 02:10:29" (1/3) ... [2020-10-15 02:10:30,509 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dbd3828 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 02:10:30, skipping insertion in model container [2020-10-15 02:10:30,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:10:30" (2/3) ... [2020-10-15 02:10:30,510 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dbd3828 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 02:10:30, skipping insertion in model container [2020-10-15 02:10:30,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 02:10:30" (3/3) ... [2020-10-15 02:10:30,512 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i5_o5-1.c [2020-10-15 02:10:30,522 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-15 02:10:30,529 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-15 02:10:30,543 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-15 02:10:30,567 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-15 02:10:30,567 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-15 02:10:30,567 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-15 02:10:30,567 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-15 02:10:30,568 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-15 02:10:30,568 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-15 02:10:30,568 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-15 02:10:30,568 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-15 02:10:30,582 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-10-15 02:10:30,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 02:10:30,588 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 02:10:30,589 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 02:10:30,589 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 02:10:30,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 02:10:30,595 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-10-15 02:10:30,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 02:10:30,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [80301060] [2020-10-15 02:10:30,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 02:10:30,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 02:10:30,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 02:10:30,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 02:10:30,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 02:10:30,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-15 02:10:30,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 02:10:30,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 141 [2020-10-15 02:10:30,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 02:10:30,835 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 02:10:30,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 02:10:30,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-15 02:10:30,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-15 02:10:30,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-15 02:10:30,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 02:10:30,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 02:10:30,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 02:10:30,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 02:10:30,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 02:10:30,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 02:10:30,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 02:10:30,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 02:10:30,890 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 02:10:30,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 02:10:30,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 02:10:30,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 02:10:30,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 02:10:30,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-15 02:10:30,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 02:10:30,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 02:10:30,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 02:10:30,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 02:10:30,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 02:10:30,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-15 02:10:30,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 02:10:30,920 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 02:10:30,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-15 02:10:30,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 02:10:30,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-15 02:10:30,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 02:10:30,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 02:10:30,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [80301060] [2020-10-15 02:10:30,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 02:10:30,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-15 02:10:30,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663672830] [2020-10-15 02:10:30,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 02:10:30,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 02:10:30,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 02:10:30,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-15 02:10:30,976 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-10-15 02:10:31,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 02:10:31,029 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2020-10-15 02:10:31,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 02:10:31,031 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-10-15 02:10:31,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 02:10:31,042 INFO L225 Difference]: With dead ends: 32 [2020-10-15 02:10:31,042 INFO L226 Difference]: Without dead ends: 18 [2020-10-15 02:10:31,046 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-15 02:10:31,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-15 02:10:31,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-15 02:10:31,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-15 02:10:31,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-10-15 02:10:31,114 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-10-15 02:10:31,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 02:10:31,115 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-10-15 02:10:31,115 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 02:10:31,115 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-10-15 02:10:31,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 02:10:31,117 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 02:10:31,117 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 02:10:31,118 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-15 02:10:31,118 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 02:10:31,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 02:10:31,119 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-10-15 02:10:31,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 02:10:31,119 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1862776072] [2020-10-15 02:10:31,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 02:10:31,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 02:10:31,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 02:10:31,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 02:10:31,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 02:10:31,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-15 02:10:31,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 02:10:31,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 352 [2020-10-15 02:10:31,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 02:10:31,489 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 02:10:31,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-15 02:10:31,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 02:10:31,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-15 02:10:31,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 02:10:31,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 02:10:31,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 02:10:31,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 02:10:31,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 02:10:31,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 02:10:31,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 02:10:31,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 02:10:31,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 02:10:31,506 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 02:10:31,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 02:10:31,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 02:10:31,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 02:10:31,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 02:10:31,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-15 02:10:31,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 02:10:31,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 02:10:31,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 02:10:31,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-15 02:10:31,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 02:10:31,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-15 02:10:31,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 02:10:31,548 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 02:10:31,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-15 02:10:31,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-15 02:10:31,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-15 02:10:31,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 02:10:31,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-15 02:10:31,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 02:10:31,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 02:10:31,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 02:10:31,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 02:10:31,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 02:10:31,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-15 02:10:31,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 02:10:31,597 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 02:10:31,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-15 02:10:31,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 02:10:31,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-15 02:10:31,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-15 02:10:31,632 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 02:10:31,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1862776072] [2020-10-15 02:10:31,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 02:10:31,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-15 02:10:31,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777738569] [2020-10-15 02:10:31,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 02:10:31,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 02:10:31,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 02:10:31,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-15 02:10:31,642 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2020-10-15 02:10:31,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 02:10:31,738 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-10-15 02:10:31,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-15 02:10:31,739 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-10-15 02:10:31,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 02:10:31,741 INFO L225 Difference]: With dead ends: 25 [2020-10-15 02:10:31,741 INFO L226 Difference]: Without dead ends: 21 [2020-10-15 02:10:31,742 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-15 02:10:31,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-15 02:10:31,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-15 02:10:31,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-15 02:10:31,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-10-15 02:10:31,749 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-10-15 02:10:31,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 02:10:31,750 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-10-15 02:10:31,750 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 02:10:31,750 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-10-15 02:10:31,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 02:10:31,751 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 02:10:31,752 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 02:10:31,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-15 02:10:31,752 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 02:10:31,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 02:10:31,753 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2020-10-15 02:10:31,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 02:10:31,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [168967684] [2020-10-15 02:10:31,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 02:10:31,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 02:10:31,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 02:10:31,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 02:10:32,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 02:10:32,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-15 02:10:32,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 02:10:32,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 398 [2020-10-15 02:10:32,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 02:10:32,165 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 02:10:32,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-15 02:10:32,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 02:10:32,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-15 02:10:32,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 02:10:32,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 02:10:32,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 02:10:32,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 02:10:32,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 02:10:32,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 02:10:32,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 02:10:32,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 02:10:32,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 02:10:32,197 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 02:10:32,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 02:10:32,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 02:10:32,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 02:10:32,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 02:10:32,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-15 02:10:32,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 02:10:32,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 02:10:32,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 02:10:32,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-15 02:10:32,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 02:10:32,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-15 02:10:32,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 02:10:32,275 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 02:10:32,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-15 02:10:32,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-15 02:10:32,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-15 02:10:32,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-15 02:10:32,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-15 02:10:32,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 02:10:32,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 02:10:32,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 02:10:32,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-15 02:10:32,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 02:10:32,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-15 02:10:32,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 02:10:32,354 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 02:10:32,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-15 02:10:32,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 02:10:32,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-15 02:10:32,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 02:10:32,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-15 02:10:32,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 02:10:32,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 02:10:32,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 02:10:32,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 02:10:32,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 02:10:32,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-15 02:10:32,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 02:10:32,392 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 02:10:32,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-15 02:10:32,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 02:10:32,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-15 02:10:32,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 02:10:32,421 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-15 02:10:32,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [168967684] [2020-10-15 02:10:32,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 02:10:32,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-15 02:10:32,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063385919] [2020-10-15 02:10:32,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-15 02:10:32,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 02:10:32,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-15 02:10:32,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-15 02:10:32,424 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2020-10-15 02:10:32,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 02:10:32,502 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-10-15 02:10:32,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 02:10:32,503 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-10-15 02:10:32,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 02:10:32,505 INFO L225 Difference]: With dead ends: 28 [2020-10-15 02:10:32,505 INFO L226 Difference]: Without dead ends: 24 [2020-10-15 02:10:32,507 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-15 02:10:32,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-15 02:10:32,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-15 02:10:32,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-15 02:10:32,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-10-15 02:10:32,517 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-10-15 02:10:32,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 02:10:32,518 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-10-15 02:10:32,518 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-15 02:10:32,519 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-10-15 02:10:32,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 02:10:32,521 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 02:10:32,521 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 02:10:32,521 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-15 02:10:32,521 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 02:10:32,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 02:10:32,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2020-10-15 02:10:32,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 02:10:32,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [693145689] [2020-10-15 02:10:32,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 02:10:32,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 02:10:32,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 02:10:32,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 02:10:33,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 02:10:33,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-15 02:10:33,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 02:10:33,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 488 [2020-10-15 02:10:33,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 02:10:33,025 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 02:10:33,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-15 02:10:33,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 02:10:33,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-15 02:10:33,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 02:10:33,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 02:10:33,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 02:10:33,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 02:10:33,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 02:10:33,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 02:10:33,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 02:10:33,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 02:10:33,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 02:10:33,043 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 02:10:33,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 02:10:33,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 02:10:33,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 02:10:33,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 02:10:33,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-15 02:10:33,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 02:10:33,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 02:10:33,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 02:10:33,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-15 02:10:33,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 02:10:33,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-10-15 02:10:33,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 02:10:33,140 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 02:10:33,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-15 02:10:33,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-15 02:10:33,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-15 02:10:33,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 02:10:33,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-15 02:10:33,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 02:10:33,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 02:10:33,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 02:10:33,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-15 02:10:33,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 02:10:33,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-10-15 02:10:33,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 02:10:33,229 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 02:10:33,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-15 02:10:33,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 02:10:33,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-15 02:10:33,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 02:10:33,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-15 02:10:33,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 02:10:33,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 02:10:33,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 02:10:33,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-15 02:10:33,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 02:10:33,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-15 02:10:33,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 02:10:33,273 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 02:10:33,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-15 02:10:33,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 02:10:33,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-15 02:10:33,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 02:10:33,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-15 02:10:33,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 02:10:33,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 02:10:33,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 02:10:33,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 02:10:33,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 02:10:33,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-15 02:10:33,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 02:10:33,320 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 02:10:33,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-15 02:10:33,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 02:10:33,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-15 02:10:33,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 02:10:33,342 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-15 02:10:33,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [693145689] [2020-10-15 02:10:33,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 02:10:33,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-15 02:10:33,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870236365] [2020-10-15 02:10:33,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 02:10:33,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 02:10:33,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 02:10:33,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-15 02:10:33,349 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 9 states. [2020-10-15 02:10:33,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 02:10:33,432 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-10-15 02:10:33,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 02:10:33,433 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-10-15 02:10:33,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 02:10:33,434 INFO L225 Difference]: With dead ends: 31 [2020-10-15 02:10:33,435 INFO L226 Difference]: Without dead ends: 27 [2020-10-15 02:10:33,435 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-15 02:10:33,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-15 02:10:33,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-15 02:10:33,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-15 02:10:33,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-10-15 02:10:33,442 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-10-15 02:10:33,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 02:10:33,442 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-10-15 02:10:33,443 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 02:10:33,443 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-10-15 02:10:33,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-15 02:10:33,444 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 02:10:33,444 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 02:10:33,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-15 02:10:33,445 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 02:10:33,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 02:10:33,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2020-10-15 02:10:33,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 02:10:33,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [284998984] [2020-10-15 02:10:33,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 02:10:33,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 02:10:33,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 02:10:33,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 02:10:34,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 02:10:34,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-15 02:10:34,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 02:10:34,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1099 [2020-10-15 02:10:34,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 02:10:34,556 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 02:10:34,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-15 02:10:34,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 02:10:34,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-15 02:10:34,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 02:10:34,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 02:10:34,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 02:10:34,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 02:10:34,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 02:10:34,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 02:10:34,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 02:10:34,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 02:10:34,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 02:10:34,570 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 02:10:34,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 02:10:34,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 02:10:34,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 02:10:34,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 02:10:34,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-15 02:10:34,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 02:10:34,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 02:10:34,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 02:10:34,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-15 02:10:34,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 02:10:34,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 79 [2020-10-15 02:10:34,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 02:10:34,659 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 02:10:34,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-15 02:10:34,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-15 02:10:34,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-15 02:10:34,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 02:10:34,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-15 02:10:34,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 02:10:34,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 02:10:34,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 02:10:34,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-15 02:10:34,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 02:10:34,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-10-15 02:10:34,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 02:10:34,753 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 02:10:34,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-15 02:10:34,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 02:10:34,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-15 02:10:34,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 02:10:34,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-15 02:10:34,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 02:10:34,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 02:10:34,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 02:10:34,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-15 02:10:34,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 02:10:34,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-15 02:10:34,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 02:10:34,818 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 02:10:34,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-15 02:10:34,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 02:10:34,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-15 02:10:34,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 02:10:34,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-15 02:10:34,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 02:10:34,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 02:10:34,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 02:10:34,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-15 02:10:34,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 02:10:34,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-15 02:10:34,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 02:10:34,857 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 02:10:34,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-15 02:10:34,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 02:10:34,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-15 02:10:34,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 02:10:34,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-15 02:10:34,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 02:10:34,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 02:10:34,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 02:10:34,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 02:10:34,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 02:10:34,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-15 02:10:34,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 02:10:34,903 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 02:10:34,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-15 02:10:34,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 02:10:34,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-15 02:10:34,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 02:10:34,954 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-15 02:10:34,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [284998984] [2020-10-15 02:10:34,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 02:10:34,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-15 02:10:34,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555058082] [2020-10-15 02:10:34,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 02:10:34,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 02:10:34,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 02:10:34,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-10-15 02:10:34,957 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 12 states. [2020-10-15 02:10:35,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 02:10:35,086 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-10-15 02:10:35,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 02:10:35,087 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 37 [2020-10-15 02:10:35,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 02:10:35,090 INFO L225 Difference]: With dead ends: 34 [2020-10-15 02:10:35,090 INFO L226 Difference]: Without dead ends: 30 [2020-10-15 02:10:35,091 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2020-10-15 02:10:35,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-15 02:10:35,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-15 02:10:35,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-15 02:10:35,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-10-15 02:10:35,098 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-10-15 02:10:35,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 02:10:35,098 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-10-15 02:10:35,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 02:10:35,098 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-10-15 02:10:35,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-15 02:10:35,100 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 02:10:35,100 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 02:10:35,100 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-15 02:10:35,101 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 02:10:35,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 02:10:35,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2020-10-15 02:10:35,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 02:10:35,102 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [991433192] [2020-10-15 02:10:35,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 02:10:35,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-15 02:10:35,110 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-15 02:10:35,111 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-15 02:10:35,115 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-15 02:10:35,134 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 02:10:35 BoogieIcfgContainer [2020-10-15 02:10:35,135 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-15 02:10:35,137 INFO L168 Benchmark]: Toolchain (without parser) took 5214.86 ms. Allocated memory was 146.8 MB in the beginning and 286.3 MB in the end (delta: 139.5 MB). Free memory was 103.3 MB in the beginning and 255.1 MB in the end (delta: -151.8 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-10-15 02:10:35,138 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 146.8 MB. Free memory was 121.3 MB in the beginning and 120.9 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. [2020-10-15 02:10:35,139 INFO L168 Benchmark]: CACSL2BoogieTranslator took 253.46 ms. Allocated memory is still 146.8 MB. Free memory was 102.9 MB in the beginning and 93.9 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 7.1 GB. [2020-10-15 02:10:35,140 INFO L168 Benchmark]: Boogie Preprocessor took 22.86 ms. Allocated memory is still 146.8 MB. Free memory was 93.9 MB in the beginning and 92.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-10-15 02:10:35,141 INFO L168 Benchmark]: RCFGBuilder took 301.53 ms. Allocated memory was 146.8 MB in the beginning and 202.9 MB in the end (delta: 56.1 MB). Free memory was 92.2 MB in the beginning and 170.4 MB in the end (delta: -78.2 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-10-15 02:10:35,142 INFO L168 Benchmark]: TraceAbstraction took 4629.83 ms. Allocated memory was 202.9 MB in the beginning and 286.3 MB in the end (delta: 83.4 MB). Free memory was 170.4 MB in the beginning and 255.1 MB in the end (delta: -84.7 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-10-15 02:10:35,145 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 146.8 MB. Free memory was 121.3 MB in the beginning and 120.9 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 253.46 ms. Allocated memory is still 146.8 MB. Free memory was 102.9 MB in the beginning and 93.9 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 22.86 ms. Allocated memory is still 146.8 MB. Free memory was 93.9 MB in the beginning and 92.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 301.53 ms. Allocated memory was 146.8 MB in the beginning and 202.9 MB in the end (delta: 56.1 MB). Free memory was 92.2 MB in the beginning and 170.4 MB in the end (delta: -78.2 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4629.83 ms. Allocated memory was 202.9 MB in the beginning and 286.3 MB in the end (delta: 83.4 MB). Free memory was 170.4 MB in the beginning and 255.1 MB in the end (delta: -84.7 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] int input = 5; [L11] CALL, EXPR id(input) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND TRUE x==0 [L5] return 0; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L11] RET, EXPR id(input) [L11] int result = id(input); [L12] COND TRUE result == 5 [L13] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.5s, OverallIterations: 6, TraceHistogramMax: 6, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 71 SDtfs, 61 SDslu, 202 SDs, 0 SdLazy, 99 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 85 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 3.7s InterpolantComputationTime, 168 NumberOfCodeBlocks, 168 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 120 ConstructedInterpolants, 0 QuantifiedInterpolants, 8388 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 39/100 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...