/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id2_b3_o2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 13:24:04,270 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 13:24:04,274 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 13:24:04,316 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 13:24:04,317 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 13:24:04,324 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 13:24:04,326 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 13:24:04,330 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 13:24:04,333 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 13:24:04,336 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 13:24:04,338 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 13:24:04,339 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 13:24:04,339 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 13:24:04,342 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 13:24:04,344 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 13:24:04,346 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 13:24:04,347 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 13:24:04,348 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 13:24:04,350 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 13:24:04,358 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 13:24:04,361 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 13:24:04,362 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 13:24:04,363 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 13:24:04,364 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 13:24:04,376 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 13:24:04,376 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 13:24:04,377 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 13:24:04,384 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 13:24:04,384 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 13:24:04,388 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 13:24:04,388 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 13:24:04,389 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 13:24:04,393 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 13:24:04,394 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 13:24:04,395 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 13:24:04,395 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 13:24:04,396 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 13:24:04,396 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 13:24:04,397 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 13:24:04,398 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 13:24:04,400 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 13:24:04,401 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 13:24:04,448 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 13:24:04,448 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 13:24:04,450 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 13:24:04,450 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 13:24:04,450 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 13:24:04,451 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 13:24:04,451 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 13:24:04,451 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 13:24:04,451 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 13:24:04,452 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 13:24:04,453 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 13:24:04,453 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 13:24:04,453 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 13:24:04,454 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 13:24:04,454 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 13:24:04,454 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 13:24:04,454 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 13:24:04,454 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 13:24:04,455 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 13:24:04,455 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 13:24:04,455 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 13:24:04,455 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 13:24:04,455 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 13:24:04,456 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 13:24:04,456 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 13:24:04,456 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 13:24:04,456 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 13:24:04,456 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 13:24:04,457 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 13:24:04,457 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; [2020-09-25 13:24:04,894 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 13:24:04,921 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 13:24:04,926 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 13:24:04,927 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 13:24:04,928 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 13:24:04,929 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id2_b3_o2.c [2020-09-25 13:24:05,018 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0ba7693b1/89af25d75c3e4359bf9898de7c062e29/FLAG5de3e7216 [2020-09-25 13:24:05,561 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 13:24:05,562 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id2_b3_o2.c [2020-09-25 13:24:05,571 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0ba7693b1/89af25d75c3e4359bf9898de7c062e29/FLAG5de3e7216 [2020-09-25 13:24:05,909 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0ba7693b1/89af25d75c3e4359bf9898de7c062e29 [2020-09-25 13:24:05,923 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 13:24:05,929 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 13:24:05,931 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 13:24:05,931 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 13:24:05,937 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 13:24:05,938 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 01:24:05" (1/1) ... [2020-09-25 13:24:05,943 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12d8d2ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:24:05, skipping insertion in model container [2020-09-25 13:24:05,944 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 01:24:05" (1/1) ... [2020-09-25 13:24:05,955 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 13:24:05,983 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 13:24:06,194 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 13:24:06,201 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 13:24:06,226 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 13:24:06,245 INFO L208 MainTranslator]: Completed translation [2020-09-25 13:24:06,246 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:24:06 WrapperNode [2020-09-25 13:24:06,246 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 13:24:06,247 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 13:24:06,247 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 13:24:06,247 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 13:24:06,264 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:24:06" (1/1) ... [2020-09-25 13:24:06,265 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:24:06" (1/1) ... [2020-09-25 13:24:06,270 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:24:06" (1/1) ... [2020-09-25 13:24:06,271 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:24:06" (1/1) ... [2020-09-25 13:24:06,365 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:24:06" (1/1) ... [2020-09-25 13:24:06,368 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:24:06" (1/1) ... [2020-09-25 13:24:06,370 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:24:06" (1/1) ... [2020-09-25 13:24:06,371 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 13:24:06,372 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 13:24:06,372 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 13:24:06,372 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 13:24:06,373 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:24:06" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 13:24:06,455 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 13:24:06,455 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 13:24:06,455 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-09-25 13:24:06,456 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2020-09-25 13:24:06,456 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 13:24:06,456 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-25 13:24:06,456 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 13:24:06,456 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-09-25 13:24:06,457 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2020-09-25 13:24:06,457 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 13:24:06,457 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 13:24:06,457 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 13:24:06,715 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 13:24:06,715 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 13:24:06,722 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 01:24:06 BoogieIcfgContainer [2020-09-25 13:24:06,722 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 13:24:06,726 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 13:24:06,727 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 13:24:06,745 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 13:24:06,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 01:24:05" (1/3) ... [2020-09-25 13:24:06,747 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dac7d55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 01:24:06, skipping insertion in model container [2020-09-25 13:24:06,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:24:06" (2/3) ... [2020-09-25 13:24:06,748 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dac7d55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 01:24:06, skipping insertion in model container [2020-09-25 13:24:06,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 01:24:06" (3/3) ... [2020-09-25 13:24:06,750 INFO L109 eAbstractionObserver]: Analyzing ICFG id2_b3_o2.c [2020-09-25 13:24:06,766 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 13:24:06,777 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 13:24:06,802 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 13:24:06,831 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 13:24:06,831 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 13:24:06,832 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 13:24:06,832 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 13:24:06,832 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 13:24:06,832 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 13:24:06,832 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 13:24:06,833 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 13:24:06,855 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-09-25 13:24:06,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-25 13:24:06,862 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:24:06,863 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 13:24:06,864 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:24:06,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:24:06,870 INFO L82 PathProgramCache]: Analyzing trace with hash 875745540, now seen corresponding path program 1 times [2020-09-25 13:24:06,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:24:06,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [769622231] [2020-09-25 13:24:06,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:24:07,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:24:07,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:24:07,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:24:07,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 13:24:07,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:24:07,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-09-25 13:24:07,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:24:07,088 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:24:07,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 13:24:07,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-25 13:24:07,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 13:24:07,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 13:24:07,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:24:07,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:24:07,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:24:07,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:24:07,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 13:24:07,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:24:07,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 13:24:07,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:24:07,175 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:24:07,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:24:07,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:24:07,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:24:07,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:24:07,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-25 13:24:07,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:24:07,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:24:07,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:24:07,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 13:24:07,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:24:07,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-09-25 13:24:07,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:24:07,212 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:24:07,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 13:24:07,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:24:07,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 13:24:07,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:24:07,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 13:24:07,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [769622231] [2020-09-25 13:24:07,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 13:24:07,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 13:24:07,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649284094] [2020-09-25 13:24:07,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 13:24:07,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:24:07,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 13:24:07,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 13:24:07,286 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 5 states. [2020-09-25 13:24:07,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:24:07,378 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2020-09-25 13:24:07,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 13:24:07,380 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-09-25 13:24:07,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:24:07,395 INFO L225 Difference]: With dead ends: 51 [2020-09-25 13:24:07,395 INFO L226 Difference]: Without dead ends: 36 [2020-09-25 13:24:07,400 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 13:24:07,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-09-25 13:24:07,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-09-25 13:24:07,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-25 13:24:07,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-09-25 13:24:07,457 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 16 [2020-09-25 13:24:07,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:24:07,458 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-09-25 13:24:07,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 13:24:07,459 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-09-25 13:24:07,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-25 13:24:07,462 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:24:07,462 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 13:24:07,462 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 13:24:07,463 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:24:07,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:24:07,463 INFO L82 PathProgramCache]: Analyzing trace with hash 71846672, now seen corresponding path program 1 times [2020-09-25 13:24:07,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:24:07,464 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1728873110] [2020-09-25 13:24:07,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:24:07,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:24:07,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:24:07,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:24:07,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-25 13:24:07,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:24:07,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 221 [2020-09-25 13:24:07,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:24:07,725 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:24:07,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 13:24:07,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-25 13:24:07,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-25 13:24:07,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:24:07,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:24:07,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:24:07,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:24:07,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:24:07,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 13:24:07,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:24:07,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 13:24:07,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:24:07,800 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:24:07,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:24:07,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:24:07,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:24:07,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:24:07,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-25 13:24:07,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:24:07,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:24:07,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:24:07,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-25 13:24:07,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:24:07,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 98 [2020-09-25 13:24:07,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:24:07,913 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:24:07,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 13:24:07,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:24:07,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-25 13:24:07,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:24:07,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-25 13:24:07,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:24:07,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:24:08,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:24:08,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 13:24:08,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:24:08,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-09-25 13:24:08,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:24:08,006 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:24:08,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 13:24:08,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:24:08,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 13:24:08,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:24:08,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 13:24:08,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1728873110] [2020-09-25 13:24:08,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 13:24:08,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-25 13:24:08,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111340300] [2020-09-25 13:24:08,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 13:24:08,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:24:08,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 13:24:08,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-09-25 13:24:08,042 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 8 states. [2020-09-25 13:24:08,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:24:08,187 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2020-09-25 13:24:08,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 13:24:08,188 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-09-25 13:24:08,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:24:08,190 INFO L225 Difference]: With dead ends: 66 [2020-09-25 13:24:08,190 INFO L226 Difference]: Without dead ends: 44 [2020-09-25 13:24:08,191 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 13:24:08,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-25 13:24:08,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-09-25 13:24:08,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-25 13:24:08,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-09-25 13:24:08,201 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 25 [2020-09-25 13:24:08,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:24:08,201 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-09-25 13:24:08,202 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 13:24:08,202 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-09-25 13:24:08,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-25 13:24:08,203 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:24:08,204 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 13:24:08,204 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 13:24:08,204 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:24:08,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:24:08,205 INFO L82 PathProgramCache]: Analyzing trace with hash -511991682, now seen corresponding path program 1 times [2020-09-25 13:24:08,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:24:08,205 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1454486933] [2020-09-25 13:24:08,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:24:08,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:24:08,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:24:08,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:24:08,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:24:09,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:24:09,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-25 13:24:09,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 13:24:09,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 880 [2020-09-25 13:24:09,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:24:09,104 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:24:09,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 13:24:09,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-09-25 13:24:09,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-25 13:24:09,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 13:24:09,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:24:09,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:24:09,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:24:09,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:24:09,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 13:24:09,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:24:09,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 13:24:09,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:24:09,165 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:24:09,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:24:09,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:24:09,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:24:09,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:24:09,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-25 13:24:09,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:24:09,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:24:09,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:24:09,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:24:09,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:24:09,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-25 13:24:09,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 13:24:09,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 638 [2020-09-25 13:24:09,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:24:09,816 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:24:09,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 13:24:09,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:24:09,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-25 13:24:09,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:24:09,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-25 13:24:09,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:24:09,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:24:09,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:24:09,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:24:09,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-25 13:24:09,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 13:24:09,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 118 [2020-09-25 13:24:09,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:24:09,994 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:24:09,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 13:24:09,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:24:09,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-25 13:24:09,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:24:10,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-25 13:24:10,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:24:10,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:24:10,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:24:10,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 13:24:10,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:24:10,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 13:24:10,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:24:10,030 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:24:10,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:24:10,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:24:10,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:24:10,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-09-25 13:24:10,046 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 13:24:10,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1454486933] [2020-09-25 13:24:10,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 13:24:10,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-25 13:24:10,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400800277] [2020-09-25 13:24:10,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 13:24:10,049 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:24:10,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 13:24:10,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-09-25 13:24:10,050 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 8 states. [2020-09-25 13:24:10,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:24:10,134 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2020-09-25 13:24:10,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 13:24:10,135 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2020-09-25 13:24:10,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:24:10,137 INFO L225 Difference]: With dead ends: 69 [2020-09-25 13:24:10,138 INFO L226 Difference]: Without dead ends: 50 [2020-09-25 13:24:10,139 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-09-25 13:24:10,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-25 13:24:10,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-09-25 13:24:10,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-25 13:24:10,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-09-25 13:24:10,155 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 34 [2020-09-25 13:24:10,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:24:10,156 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-09-25 13:24:10,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 13:24:10,157 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-09-25 13:24:10,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-25 13:24:10,158 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:24:10,159 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 13:24:10,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 13:24:10,159 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:24:10,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:24:10,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1477652418, now seen corresponding path program 1 times [2020-09-25 13:24:10,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:24:10,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [833340573] [2020-09-25 13:24:10,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:24:10,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:24:10,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:24:10,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:24:10,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:24:10,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-25 13:24:10,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 13:24:10,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 338 [2020-09-25 13:24:10,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:24:10,516 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:24:10,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 13:24:10,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-09-25 13:24:10,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 13:24:10,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:24:10,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:24:10,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:24:10,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:24:10,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:24:10,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 13:24:10,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:24:10,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 13:24:10,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:24:10,552 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:24:10,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:24:10,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:24:10,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:24:10,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:24:10,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-25 13:24:10,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:24:10,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:24:10,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:24:10,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:24:10,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-25 13:24:10,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 13:24:10,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 205 [2020-09-25 13:24:10,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:24:10,781 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:24:10,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 13:24:10,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:24:10,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-25 13:24:10,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:24:10,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-25 13:24:10,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:24:10,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:24:10,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:24:10,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:24:10,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-25 13:24:10,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 13:24:10,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-09-25 13:24:10,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:24:10,845 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:24:10,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 13:24:10,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-25 13:24:10,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 13:24:10,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:24:10,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-25 13:24:10,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:24:10,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:24:10,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:24:10,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 13:24:10,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:24:10,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-25 13:24:10,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:24:10,922 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:24:10,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 13:24:10,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:24:10,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 13:24:10,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:24:10,943 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 13:24:10,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [833340573] [2020-09-25 13:24:10,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 13:24:10,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 13:24:10,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179188289] [2020-09-25 13:24:10,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 13:24:10,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:24:10,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 13:24:10,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-09-25 13:24:10,946 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 8 states. [2020-09-25 13:24:11,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:24:11,027 INFO L93 Difference]: Finished difference Result 84 states and 92 transitions. [2020-09-25 13:24:11,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 13:24:11,028 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2020-09-25 13:24:11,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:24:11,029 INFO L225 Difference]: With dead ends: 84 [2020-09-25 13:24:11,030 INFO L226 Difference]: Without dead ends: 57 [2020-09-25 13:24:11,031 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-09-25 13:24:11,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-09-25 13:24:11,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 52. [2020-09-25 13:24:11,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-25 13:24:11,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2020-09-25 13:24:11,039 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 34 [2020-09-25 13:24:11,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:24:11,040 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2020-09-25 13:24:11,040 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 13:24:11,040 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2020-09-25 13:24:11,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-25 13:24:11,041 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:24:11,042 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 13:24:11,042 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 13:24:11,042 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:24:11,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:24:11,043 INFO L82 PathProgramCache]: Analyzing trace with hash -2109914946, now seen corresponding path program 1 times [2020-09-25 13:24:11,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:24:11,043 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1634973343] [2020-09-25 13:24:11,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:24:11,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 13:24:11,053 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 13:24:11,053 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 13:24:11,059 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 13:24:11,081 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 01:24:11 BoogieIcfgContainer [2020-09-25 13:24:11,082 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 13:24:11,085 INFO L168 Benchmark]: Toolchain (without parser) took 5159.07 ms. Allocated memory was 148.4 MB in the beginning and 243.8 MB in the end (delta: 95.4 MB). Free memory was 103.9 MB in the beginning and 174.7 MB in the end (delta: -70.8 MB). Peak memory consumption was 24.6 MB. Max. memory is 7.1 GB. [2020-09-25 13:24:11,086 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 148.4 MB. Free memory was 121.7 MB in the beginning and 121.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-25 13:24:11,087 INFO L168 Benchmark]: CACSL2BoogieTranslator took 315.28 ms. Allocated memory is still 148.4 MB. Free memory was 103.2 MB in the beginning and 93.7 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-09-25 13:24:11,088 INFO L168 Benchmark]: Boogie Preprocessor took 124.93 ms. Allocated memory was 148.4 MB in the beginning and 205.5 MB in the end (delta: 57.1 MB). Free memory was 93.7 MB in the beginning and 184.6 MB in the end (delta: -90.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-09-25 13:24:11,089 INFO L168 Benchmark]: RCFGBuilder took 350.30 ms. Allocated memory is still 205.5 MB. Free memory was 184.6 MB in the beginning and 171.2 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. [2020-09-25 13:24:11,090 INFO L168 Benchmark]: TraceAbstraction took 4355.26 ms. Allocated memory was 205.5 MB in the beginning and 243.8 MB in the end (delta: 38.3 MB). Free memory was 170.6 MB in the beginning and 174.7 MB in the end (delta: -4.1 MB). Peak memory consumption was 34.2 MB. Max. memory is 7.1 GB. [2020-09-25 13:24:11,094 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 148.4 MB. Free memory was 121.7 MB in the beginning and 121.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 315.28 ms. Allocated memory is still 148.4 MB. Free memory was 103.2 MB in the beginning and 93.7 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 124.93 ms. Allocated memory was 148.4 MB in the beginning and 205.5 MB in the end (delta: 57.1 MB). Free memory was 93.7 MB in the beginning and 184.6 MB in the end (delta: -90.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 350.30 ms. Allocated memory is still 205.5 MB. Free memory was 184.6 MB in the beginning and 171.2 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4355.26 ms. Allocated memory was 205.5 MB in the beginning and 243.8 MB in the end (delta: 38.3 MB). Free memory was 170.6 MB in the beginning and 174.7 MB in the end (delta: -4.1 MB). Peak memory consumption was 34.2 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: 4.2s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 159 SDtfs, 16 SDslu, 780 SDs, 0 SdLazy, 113 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 63 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 28 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, 3.3s InterpolantComputationTime, 143 NumberOfCodeBlocks, 143 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 105 ConstructedInterpolants, 0 QuantifiedInterpolants, 8295 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...