/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=0.5 --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/id2_b3_o2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 14:31:36,911 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 14:31:36,915 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 14:31:36,940 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 14:31:36,941 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 14:31:36,942 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 14:31:36,943 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 14:31:36,945 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 14:31:36,947 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 14:31:36,948 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 14:31:36,949 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 14:31:36,950 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 14:31:36,950 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 14:31:36,951 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 14:31:36,953 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 14:31:36,954 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 14:31:36,955 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 14:31:36,956 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 14:31:36,958 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 14:31:36,960 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 14:31:36,962 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 14:31:36,963 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 14:31:36,965 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 14:31:36,965 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 14:31:36,968 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 14:31:36,969 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 14:31:36,969 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 14:31:36,970 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 14:31:36,970 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 14:31:36,971 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 14:31:36,972 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 14:31:36,973 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 14:31:36,974 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 14:31:36,974 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 14:31:36,976 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 14:31:36,976 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 14:31:36,977 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 14:31:36,977 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 14:31:36,977 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 14:31:36,978 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 14:31:36,979 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 14:31:36,980 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 14:31:37,005 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 14:31:37,006 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 14:31:37,007 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 14:31:37,007 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 14:31:37,007 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 14:31:37,008 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 14:31:37,008 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 14:31:37,008 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 14:31:37,008 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 14:31:37,009 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 14:31:37,009 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 14:31:37,009 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 14:31:37,009 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 14:31:37,009 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 14:31:37,010 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 14:31:37,010 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 14:31:37,010 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 14:31:37,010 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 14:31:37,010 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 14:31:37,011 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 14:31:37,011 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 14:31:37,011 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 14:31:37,011 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 14:31:37,012 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 14:31:37,012 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 14:31:37,012 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 14:31:37,012 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 14:31:37,012 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 14:31:37,013 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 14:31:37,013 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=0.5;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=0.5;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=0.5;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=0.5;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=0.5;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=0.5;log-additional-information=true; [2020-09-25 14:31:37,488 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 14:31:37,505 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 14:31:37,510 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 14:31:37,512 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 14:31:37,512 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 14:31:37,513 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id2_b3_o2.c [2020-09-25 14:31:37,606 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/01ef402fd/11e3f0ee40fe4bba987844a0bb61cc19/FLAG205203fe0 [2020-09-25 14:31:38,147 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 14:31:38,148 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id2_b3_o2.c [2020-09-25 14:31:38,156 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/01ef402fd/11e3f0ee40fe4bba987844a0bb61cc19/FLAG205203fe0 [2020-09-25 14:31:38,483 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/01ef402fd/11e3f0ee40fe4bba987844a0bb61cc19 [2020-09-25 14:31:38,497 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 14:31:38,503 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 14:31:38,505 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 14:31:38,505 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 14:31:38,510 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 14:31:38,511 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:31:38" (1/1) ... [2020-09-25 14:31:38,515 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ab41b77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:31:38, skipping insertion in model container [2020-09-25 14:31:38,515 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:31:38" (1/1) ... [2020-09-25 14:31:38,524 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 14:31:38,550 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 14:31:38,770 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 14:31:38,776 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 14:31:38,797 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 14:31:38,811 INFO L208 MainTranslator]: Completed translation [2020-09-25 14:31:38,812 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:31:38 WrapperNode [2020-09-25 14:31:38,812 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 14:31:38,813 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 14:31:38,813 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 14:31:38,813 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 14:31:38,827 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:31:38" (1/1) ... [2020-09-25 14:31:38,827 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:31:38" (1/1) ... [2020-09-25 14:31:38,833 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:31:38" (1/1) ... [2020-09-25 14:31:38,833 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:31:38" (1/1) ... [2020-09-25 14:31:38,923 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:31:38" (1/1) ... [2020-09-25 14:31:38,932 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:31:38" (1/1) ... [2020-09-25 14:31:38,935 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:31:38" (1/1) ... [2020-09-25 14:31:38,941 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 14:31:38,942 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 14:31:38,942 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 14:31:38,942 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 14:31:38,944 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:31:38" (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 14:31:39,030 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 14:31:39,030 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 14:31:39,030 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-09-25 14:31:39,030 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2020-09-25 14:31:39,031 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 14:31:39,031 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-25 14:31:39,031 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 14:31:39,031 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-09-25 14:31:39,031 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2020-09-25 14:31:39,031 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 14:31:39,032 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 14:31:39,032 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 14:31:39,251 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 14:31:39,251 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 14:31:39,257 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:31:39 BoogieIcfgContainer [2020-09-25 14:31:39,258 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 14:31:39,259 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 14:31:39,259 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 14:31:39,263 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 14:31:39,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 02:31:38" (1/3) ... [2020-09-25 14:31:39,264 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a4faee6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:31:39, skipping insertion in model container [2020-09-25 14:31:39,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:31:38" (2/3) ... [2020-09-25 14:31:39,265 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a4faee6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:31:39, skipping insertion in model container [2020-09-25 14:31:39,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:31:39" (3/3) ... [2020-09-25 14:31:39,268 INFO L109 eAbstractionObserver]: Analyzing ICFG id2_b3_o2.c [2020-09-25 14:31:39,281 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 14:31:39,294 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 14:31:39,324 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 14:31:39,370 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 14:31:39,370 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 14:31:39,370 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 14:31:39,370 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 14:31:39,375 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 14:31:39,375 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 14:31:39,375 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 14:31:39,376 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 14:31:39,420 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-09-25 14:31:39,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-25 14:31:39,430 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:31:39,432 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 14:31:39,432 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:31:39,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:31:39,439 INFO L82 PathProgramCache]: Analyzing trace with hash 875745540, now seen corresponding path program 1 times [2020-09-25 14:31:39,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:31:39,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [722207880] [2020-09-25 14:31:39,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:31:39,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:31:39,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:31:39,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:31:39,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 14:31:39,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:31:39,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-09-25 14:31:39,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:31:39,657 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:31:39,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 14:31:39,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-25 14:31:39,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 14:31:39,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 14:31:39,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:31:39,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:31:39,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:31:39,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:31:39,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 14:31:39,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:31:39,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 14:31:39,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:31:39,737 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:31:39,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:31:39,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:31:39,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:31:39,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:31:39,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-25 14:31:39,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:31:39,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:31:39,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:31:39,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 14:31:39,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:31:39,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-09-25 14:31:39,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:31:39,788 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:31:39,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 14:31:39,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:31:39,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 14:31:39,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:31:39,861 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 14:31:39,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [722207880] [2020-09-25 14:31:39,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 14:31:39,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 14:31:39,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290397281] [2020-09-25 14:31:39,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 14:31:39,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:31:39,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 14:31:39,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 14:31:39,890 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 5 states. [2020-09-25 14:31:39,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:31:39,977 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2020-09-25 14:31:39,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 14:31:39,980 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-09-25 14:31:39,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:31:39,994 INFO L225 Difference]: With dead ends: 51 [2020-09-25 14:31:39,994 INFO L226 Difference]: Without dead ends: 36 [2020-09-25 14:31:39,999 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 14:31:40,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-09-25 14:31:40,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-09-25 14:31:40,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-25 14:31:40,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-09-25 14:31:40,053 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 16 [2020-09-25 14:31:40,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:31:40,054 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-09-25 14:31:40,054 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 14:31:40,054 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-09-25 14:31:40,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-25 14:31:40,057 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:31:40,057 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 14:31:40,058 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 14:31:40,058 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:31:40,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:31:40,059 INFO L82 PathProgramCache]: Analyzing trace with hash 71846672, now seen corresponding path program 1 times [2020-09-25 14:31:40,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:31:40,060 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1522637256] [2020-09-25 14:31:40,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:31:40,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:31:40,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:31:40,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:31:40,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-25 14:31:40,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:31:40,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 242 [2020-09-25 14:31:40,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:31:40,324 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:31:40,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 14:31:40,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-25 14:31:40,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-25 14:31:40,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 14:31:40,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:31:40,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:31:40,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:31:40,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:31:40,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 14:31:40,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:31:40,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 14:31:40,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:31:40,455 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:31:40,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:31:40,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:31:40,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:31:40,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 14:31:40,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-25 14:31:40,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:31:40,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:31:40,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:31:40,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-25 14:31:40,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:31:40,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-09-25 14:31:40,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:31:40,573 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:31:40,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 14:31:40,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:31:40,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-25 14:31:40,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:31:40,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-25 14:31:40,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:31:40,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:31:40,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:31:40,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 14:31:40,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:31:40,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-09-25 14:31:40,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:31:40,687 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:31:40,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 14:31:40,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:31:40,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 14:31:40,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:31:40,723 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 14:31:40,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1522637256] [2020-09-25 14:31:40,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 14:31:40,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-25 14:31:40,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761646292] [2020-09-25 14:31:40,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 14:31:40,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:31:40,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 14:31:40,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-09-25 14:31:40,729 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 8 states. [2020-09-25 14:31:40,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:31:40,854 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2020-09-25 14:31:40,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 14:31:40,855 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-09-25 14:31:40,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:31:40,856 INFO L225 Difference]: With dead ends: 66 [2020-09-25 14:31:40,857 INFO L226 Difference]: Without dead ends: 44 [2020-09-25 14:31:40,859 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-09-25 14:31:40,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-25 14:31:40,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-09-25 14:31:40,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-25 14:31:40,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-09-25 14:31:40,868 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 25 [2020-09-25 14:31:40,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:31:40,869 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-09-25 14:31:40,869 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 14:31:40,869 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-09-25 14:31:40,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-25 14:31:40,872 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:31:40,872 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 14:31:40,873 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 14:31:40,873 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:31:40,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:31:40,873 INFO L82 PathProgramCache]: Analyzing trace with hash -511991682, now seen corresponding path program 1 times [2020-09-25 14:31:40,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:31:40,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [354739835] [2020-09-25 14:31:40,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:31:40,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:31:40,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:31:40,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:31:41,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:31:41,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:31:41,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-25 14:31:41,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 14:31:41,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 685 [2020-09-25 14:31:41,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:31:41,584 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:31:41,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 14:31:41,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-09-25 14:31:41,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 14:31:41,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 14:31:41,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:31:41,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:31:41,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:31:41,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:31:41,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 14:31:41,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:31:41,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 14:31:41,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:31:41,602 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:31:41,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:31:41,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:31:41,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:31:41,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:31:41,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-25 14:31:41,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:31:41,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:31:41,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:31:41,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:31:41,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-25 14:31:41,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 14:31:41,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 265 [2020-09-25 14:31:41,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:31:41,886 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:31:41,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 14:31:41,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 14:31:41,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 14:31:41,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:31:41,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-25 14:31:41,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:31:41,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:31:41,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:31:42,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:31:42,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-25 14:31:42,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 14:31:42,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 147 [2020-09-25 14:31:42,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:31:42,110 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:31:42,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 14:31:42,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:31:42,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-25 14:31:42,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:31:42,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-25 14:31:42,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:31:42,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:31:42,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:31:42,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 14:31:42,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:31:42,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 14:31:42,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:31:42,141 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:31:42,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:31:42,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:31:42,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:31:42,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 14:31:42,154 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-25 14:31:42,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [354739835] [2020-09-25 14:31:42,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 14:31:42,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 14:31:42,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492470708] [2020-09-25 14:31:42,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 14:31:42,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:31:42,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 14:31:42,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 14:31:42,158 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 5 states. [2020-09-25 14:31:42,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:31:42,219 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2020-09-25 14:31:42,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 14:31:42,221 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-09-25 14:31:42,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:31:42,223 INFO L225 Difference]: With dead ends: 69 [2020-09-25 14:31:42,224 INFO L226 Difference]: Without dead ends: 50 [2020-09-25 14:31:42,225 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 14:31:42,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-25 14:31:42,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-09-25 14:31:42,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-25 14:31:42,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-09-25 14:31:42,252 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 34 [2020-09-25 14:31:42,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:31:42,253 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-09-25 14:31:42,253 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 14:31:42,253 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-09-25 14:31:42,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-25 14:31:42,255 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:31:42,255 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 14:31:42,255 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 14:31:42,255 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:31:42,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:31:42,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1477652418, now seen corresponding path program 1 times [2020-09-25 14:31:42,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:31:42,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [24659484] [2020-09-25 14:31:42,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:31:42,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:31:42,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:31:42,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:31:42,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:31:42,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-25 14:31:42,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 14:31:42,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 272 [2020-09-25 14:31:42,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:31:42,541 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:31:42,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 14:31:42,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-09-25 14:31:42,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 14:31:42,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:31:42,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:31:42,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:31:42,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:31:42,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:31:42,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 14:31:42,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:31:42,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 14:31:42,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:31:42,569 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:31:42,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:31:42,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:31:42,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:31:42,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:31:42,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-25 14:31:42,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:31:42,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:31:42,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:31:42,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:31:42,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-25 14:31:42,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 14:31:42,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 183 [2020-09-25 14:31:42,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:31:42,762 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:31:42,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 14:31:42,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:31:42,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-25 14:31:42,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:31:42,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-25 14:31:42,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:31:42,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:31:42,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:31:42,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:31:42,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-25 14:31:42,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 14:31:42,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-09-25 14:31:42,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:31:42,825 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:31:42,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 14:31:42,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-25 14:31:42,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 14:31:42,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:31:42,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-25 14:31:42,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:31:42,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:31:42,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:31:42,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 14:31:42,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:31:42,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-25 14:31:42,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:31:42,896 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:31:42,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 14:31:42,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:31:42,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 14:31:42,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:31:42,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-25 14:31:42,913 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [24659484] [2020-09-25 14:31:42,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 14:31:42,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 14:31:42,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201923264] [2020-09-25 14:31:42,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 14:31:42,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:31:42,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 14:31:42,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-09-25 14:31:42,915 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 8 states. [2020-09-25 14:31:42,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:31:42,994 INFO L93 Difference]: Finished difference Result 84 states and 92 transitions. [2020-09-25 14:31:42,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 14:31:42,995 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2020-09-25 14:31:42,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:31:42,996 INFO L225 Difference]: With dead ends: 84 [2020-09-25 14:31:42,996 INFO L226 Difference]: Without dead ends: 57 [2020-09-25 14:31:42,997 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-09-25 14:31:42,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-09-25 14:31:43,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 52. [2020-09-25 14:31:43,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-25 14:31:43,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2020-09-25 14:31:43,006 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 34 [2020-09-25 14:31:43,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:31:43,006 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2020-09-25 14:31:43,006 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 14:31:43,007 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2020-09-25 14:31:43,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-25 14:31:43,008 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:31:43,008 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 14:31:43,008 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 14:31:43,009 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:31:43,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:31:43,009 INFO L82 PathProgramCache]: Analyzing trace with hash -2109914946, now seen corresponding path program 1 times [2020-09-25 14:31:43,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:31:43,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2006172864] [2020-09-25 14:31:43,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:31:43,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 14:31:43,020 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 14:31:43,020 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 14:31:43,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 14:31:43,048 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 02:31:43 BoogieIcfgContainer [2020-09-25 14:31:43,048 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 14:31:43,051 INFO L168 Benchmark]: Toolchain (without parser) took 4551.20 ms. Allocated memory was 145.8 MB in the beginning and 246.4 MB in the end (delta: 100.7 MB). Free memory was 102.2 MB in the beginning and 124.0 MB in the end (delta: -21.8 MB). Peak memory consumption was 78.9 MB. Max. memory is 7.1 GB. [2020-09-25 14:31:43,052 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 145.8 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-25 14:31:43,053 INFO L168 Benchmark]: CACSL2BoogieTranslator took 307.38 ms. Allocated memory is still 145.8 MB. Free memory was 101.5 MB in the beginning and 92.0 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-09-25 14:31:43,054 INFO L168 Benchmark]: Boogie Preprocessor took 128.95 ms. Allocated memory was 145.8 MB in the beginning and 201.9 MB in the end (delta: 56.1 MB). Free memory was 92.0 MB in the beginning and 180.5 MB in the end (delta: -88.5 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-09-25 14:31:43,055 INFO L168 Benchmark]: RCFGBuilder took 315.76 ms. Allocated memory is still 201.9 MB. Free memory was 180.5 MB in the beginning and 166.8 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. [2020-09-25 14:31:43,056 INFO L168 Benchmark]: TraceAbstraction took 3788.85 ms. Allocated memory was 201.9 MB in the beginning and 246.4 MB in the end (delta: 44.6 MB). Free memory was 166.1 MB in the beginning and 124.0 MB in the end (delta: 42.1 MB). Peak memory consumption was 86.7 MB. Max. memory is 7.1 GB. [2020-09-25 14:31:43,060 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 145.8 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 307.38 ms. Allocated memory is still 145.8 MB. Free memory was 101.5 MB in the beginning and 92.0 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 128.95 ms. Allocated memory was 145.8 MB in the beginning and 201.9 MB in the end (delta: 56.1 MB). Free memory was 92.0 MB in the beginning and 180.5 MB in the end (delta: -88.5 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 315.76 ms. Allocated memory is still 201.9 MB. Free memory was 180.5 MB in the beginning and 166.8 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3788.85 ms. Allocated memory was 201.9 MB in the beginning and 246.4 MB in the end (delta: 44.6 MB). Free memory was 166.1 MB in the beginning and 124.0 MB in the end (delta: 42.1 MB). Peak memory consumption was 86.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 25]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L22] unsigned int input = __VERIFIER_nondet_uint(); [L23] CALL, EXPR id(input) [L8] COND FALSE !(x==0) [L9] CALL, EXPR id2(x-1) [L15] COND FALSE !(x==0) [L16] CALL, EXPR id(x-1) [L8] COND TRUE x==0 [L8] return 0; [L16] RET, EXPR id(x-1) [L16] unsigned int ret = id(x-1) + 1; [L17] COND FALSE !(ret > 3) [L18] return ret; [L9] RET, EXPR id2(x-1) [L9] unsigned int ret = id2(x-1) + 1; [L10] COND FALSE !(ret > 3) [L11] return ret; [L23] RET, EXPR id(input) [L23] unsigned int result = id(input); [L24] COND TRUE result == 2 [L25] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.6s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 159 SDtfs, 16 SDslu, 661 SDs, 0 SdLazy, 100 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 61 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=52occurred in iteration=4, 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, 4 MinimizatonAttempts, 10 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 2.8s InterpolantComputationTime, 143 NumberOfCodeBlocks, 143 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 105 ConstructedInterpolants, 0 QuantifiedInterpolants, 7107 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 3 PerfectInterpolantSequences, 6/8 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...