/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/recursive/Ackermann02.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 11:58:29,967 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 11:58:29,971 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 11:58:30,029 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 11:58:30,029 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 11:58:30,036 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 11:58:30,038 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 11:58:30,042 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 11:58:30,046 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 11:58:30,052 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 11:58:30,054 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 11:58:30,056 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 11:58:30,056 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 11:58:30,060 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 11:58:30,062 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 11:58:30,064 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 11:58:30,065 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 11:58:30,068 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 11:58:30,075 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 11:58:30,083 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 11:58:30,085 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 11:58:30,087 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 11:58:30,089 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 11:58:30,090 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 11:58:30,099 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 11:58:30,099 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 11:58:30,100 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 11:58:30,101 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 11:58:30,102 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 11:58:30,103 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 11:58:30,103 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 11:58:30,105 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 11:58:30,107 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 11:58:30,108 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 11:58:30,109 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 11:58:30,109 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 11:58:30,120 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 11:58:30,121 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 11:58:30,121 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 11:58:30,122 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 11:58:30,123 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 11:58:30,130 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-29 11:58:30,177 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 11:58:30,178 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 11:58:30,182 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 11:58:30,182 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 11:58:30,183 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 11:58:30,183 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 11:58:30,183 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 11:58:30,183 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 11:58:30,183 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 11:58:30,184 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 11:58:30,185 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 11:58:30,185 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 11:58:30,185 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 11:58:30,185 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 11:58:30,185 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 11:58:30,186 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 11:58:30,186 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 11:58:30,186 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 11:58:30,186 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 11:58:30,186 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 11:58:30,187 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 11:58:30,187 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 11:58:30,187 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 11:58:30,187 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 11:58:30,187 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 11:58:30,187 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 11:58:30,188 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 11:58:30,188 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 11:58:30,188 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 11:58:30,188 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 11:58:30,600 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 11:58:30,626 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 11:58:30,629 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 11:58:30,630 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 11:58:30,631 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 11:58:30,632 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Ackermann02.c [2020-10-29 11:58:30,713 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/acfc27f3c/c1afa87098e2407487a6c33f3524c5ec/FLAG638dcdb12 [2020-10-29 11:58:31,376 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 11:58:31,378 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive/Ackermann02.c [2020-10-29 11:58:31,387 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/acfc27f3c/c1afa87098e2407487a6c33f3524c5ec/FLAG638dcdb12 [2020-10-29 11:58:31,715 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/acfc27f3c/c1afa87098e2407487a6c33f3524c5ec [2020-10-29 11:58:31,719 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 11:58:31,728 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 11:58:31,732 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 11:58:31,732 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 11:58:31,737 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 11:58:31,738 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 11:58:31" (1/1) ... [2020-10-29 11:58:31,746 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40a4b03e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 11:58:31, skipping insertion in model container [2020-10-29 11:58:31,747 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 11:58:31" (1/1) ... [2020-10-29 11:58:31,757 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 11:58:31,776 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 11:58:32,011 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 11:58:32,029 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 11:58:32,054 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 11:58:32,074 INFO L208 MainTranslator]: Completed translation [2020-10-29 11:58:32,074 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 11:58:32 WrapperNode [2020-10-29 11:58:32,075 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 11:58:32,076 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 11:58:32,076 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 11:58:32,076 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 11:58:32,090 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 11:58:32" (1/1) ... [2020-10-29 11:58:32,092 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 11:58:32" (1/1) ... [2020-10-29 11:58:32,099 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 11:58:32" (1/1) ... [2020-10-29 11:58:32,100 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 11:58:32" (1/1) ... [2020-10-29 11:58:32,106 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 11:58:32" (1/1) ... [2020-10-29 11:58:32,108 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 11:58:32" (1/1) ... [2020-10-29 11:58:32,109 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 11:58:32" (1/1) ... [2020-10-29 11:58:32,112 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 11:58:32,113 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 11:58:32,113 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 11:58:32,113 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 11:58:32,114 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 11:58:32" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 11:58:32,188 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 11:58:32,188 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 11:58:32,189 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 11:58:32,189 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2020-10-29 11:58:32,189 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 11:58:32,189 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 11:58:32,190 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 11:58:32,190 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 11:58:32,190 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 11:58:32,190 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 11:58:32,190 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2020-10-29 11:58:32,190 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 11:58:32,191 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 11:58:32,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 11:58:32,191 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 11:58:32,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 11:58:32,191 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 11:58:32,192 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 11:58:32,448 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 11:58:32,449 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 11:58:32,450 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 11:58:32 BoogieIcfgContainer [2020-10-29 11:58:32,451 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 11:58:32,453 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 11:58:32,453 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 11:58:32,457 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 11:58:32,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 11:58:31" (1/3) ... [2020-10-29 11:58:32,458 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@698fcf0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 11:58:32, skipping insertion in model container [2020-10-29 11:58:32,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 11:58:32" (2/3) ... [2020-10-29 11:58:32,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@698fcf0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 11:58:32, skipping insertion in model container [2020-10-29 11:58:32,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 11:58:32" (3/3) ... [2020-10-29 11:58:32,461 INFO L111 eAbstractionObserver]: Analyzing ICFG Ackermann02.c [2020-10-29 11:58:32,495 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 11:58:32,509 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 11:58:32,550 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 11:58:32,594 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 11:58:32,594 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 11:58:32,595 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 11:58:32,595 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 11:58:32,595 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 11:58:32,595 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 11:58:32,595 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 11:58:32,595 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 11:58:32,621 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-10-29 11:58:32,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-29 11:58:32,645 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 11:58:32,645 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 11:58:32,646 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 11:58:32,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 11:58:32,655 INFO L82 PathProgramCache]: Analyzing trace with hash 192942640, now seen corresponding path program 1 times [2020-10-29 11:58:32,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 11:58:32,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [276012260] [2020-10-29 11:58:32,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 11:58:32,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 11:58:32,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 11:58:33,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 11:58:33,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-29 11:58:33,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 11:58:33,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 461 [2020-10-29 11:58:33,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 11:58:33,287 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 11:58:33,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 11:58:33,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 11:58:33,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-29 11:58:33,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 11:58:33,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 11:58:33,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 11:58:33,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 11:58:33,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 11:58:33,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 11:58:33,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 11:58:33,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 11:58:33,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 11:58:33,401 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 11:58:33,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 11:58:33,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 11:58:33,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 11:58:33,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 11:58:33,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 11:58:33,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 11:58:33,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 11:58:33,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 11:58:33,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 11:58:33,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 11:58:33,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 11:58:33,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 11:58:33,434 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 11:58:33,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 11:58:33,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 11:58:33,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-29 11:58:33,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 11:58:33,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 11:58:33,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [276012260] [2020-10-29 11:58:33,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 11:58:33,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 11:58:33,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937502477] [2020-10-29 11:58:33,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 11:58:33,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 11:58:33,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 11:58:33,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 11:58:33,502 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 6 states. [2020-10-29 11:58:33,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 11:58:33,889 INFO L93 Difference]: Finished difference Result 61 states and 84 transitions. [2020-10-29 11:58:33,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 11:58:33,891 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-29 11:58:33,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 11:58:33,902 INFO L225 Difference]: With dead ends: 61 [2020-10-29 11:58:33,902 INFO L226 Difference]: Without dead ends: 30 [2020-10-29 11:58:33,907 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-29 11:58:33,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-29 11:58:33,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-29 11:58:33,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-29 11:58:33,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-10-29 11:58:33,962 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 17 [2020-10-29 11:58:33,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 11:58:33,962 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-10-29 11:58:33,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 11:58:33,963 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-10-29 11:58:33,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-29 11:58:33,966 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 11:58:33,966 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] [2020-10-29 11:58:33,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 11:58:33,967 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 11:58:33,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 11:58:33,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1691639833, now seen corresponding path program 1 times [2020-10-29 11:58:33,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 11:58:33,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [835985345] [2020-10-29 11:58:33,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 11:58:33,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 11:58:34,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 11:58:34,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 11:58:34,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-29 11:58:34,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 11:58:34,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 226 [2020-10-29 11:58:34,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 11:58:34,216 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 11:58:34,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 11:58:34,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 11:58:34,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-29 11:58:34,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 11:58:34,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 11:58:34,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 11:58:34,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 11:58:34,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 11:58:34,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 11:58:34,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 11:58:34,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 11:58:34,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 11:58:34,277 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 11:58:34,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 11:58:34,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 11:58:34,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 11:58:34,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 11:58:34,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 11:58:34,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 11:58:34,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 11:58:34,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 11:58:34,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-29 11:58:34,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 11:58:34,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-29 11:58:34,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 11:58:34,328 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 11:58:34,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 11:58:34,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 11:58:34,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 11:58:34,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 11:58:34,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-29 11:58:34,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 11:58:34,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 11:58:34,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 11:58:34,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 11:58:34,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 11:58:34,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 11:58:34,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 11:58:34,368 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 11:58:34,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 11:58:34,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 11:58:34,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-29 11:58:34,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 11:58:34,393 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 11:58:34,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [835985345] [2020-10-29 11:58:34,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 11:58:34,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 11:58:34,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86511070] [2020-10-29 11:58:34,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 11:58:34,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 11:58:34,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 11:58:34,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-29 11:58:34,397 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 8 states. [2020-10-29 11:58:34,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 11:58:34,835 INFO L93 Difference]: Finished difference Result 52 states and 70 transitions. [2020-10-29 11:58:34,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 11:58:34,836 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-10-29 11:58:34,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 11:58:34,840 INFO L225 Difference]: With dead ends: 52 [2020-10-29 11:58:34,840 INFO L226 Difference]: Without dead ends: 47 [2020-10-29 11:58:34,842 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-29 11:58:34,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-29 11:58:34,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-29 11:58:34,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-29 11:58:34,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 65 transitions. [2020-10-29 11:58:34,872 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 65 transitions. Word has length 24 [2020-10-29 11:58:34,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 11:58:34,872 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 65 transitions. [2020-10-29 11:58:34,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 11:58:34,873 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 65 transitions. [2020-10-29 11:58:34,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-29 11:58:34,879 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 11:58:34,879 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 11:58:34,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 11:58:34,879 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 11:58:34,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 11:58:34,880 INFO L82 PathProgramCache]: Analyzing trace with hash -920167398, now seen corresponding path program 2 times [2020-10-29 11:58:34,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 11:58:34,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1014259771] [2020-10-29 11:58:34,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 11:58:34,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 11:58:34,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 11:58:35,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 11:58:35,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-29 11:58:35,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 11:58:35,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 95 [2020-10-29 11:58:35,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 11:58:35,003 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 11:58:35,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 11:58:35,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-29 11:58:35,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-29 11:58:35,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 11:58:35,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 11:58:35,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 11:58:35,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 11:58:35,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 11:58:35,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 11:58:35,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 11:58:35,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 11:58:35,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 11:58:35,070 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 11:58:35,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 11:58:35,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 11:58:35,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 11:58:35,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 11:58:35,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 11:58:35,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 11:58:35,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 11:58:35,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 11:58:35,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-29 11:58:35,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 11:58:35,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-29 11:58:35,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 11:58:35,102 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 11:58:35,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 11:58:35,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 11:58:35,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-29 11:58:35,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 11:58:35,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-29 11:58:35,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 11:58:35,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 11:58:35,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 11:58:35,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-29 11:58:35,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 11:58:35,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 11:58:35,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 11:58:35,124 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 11:58:35,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 11:58:35,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-29 11:58:35,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-29 11:58:35,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 11:58:35,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-29 11:58:35,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 11:58:35,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 11:58:35,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 11:58:35,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 11:58:35,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 11:58:35,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 11:58:35,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 11:58:35,156 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 11:58:35,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 11:58:35,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 11:58:35,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 11:58:35,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 11:58:35,163 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-29 11:58:35,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1014259771] [2020-10-29 11:58:35,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 11:58:35,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-29 11:58:35,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690321557] [2020-10-29 11:58:35,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 11:58:35,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 11:58:35,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 11:58:35,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 11:58:35,166 INFO L87 Difference]: Start difference. First operand 47 states and 65 transitions. Second operand 5 states. [2020-10-29 11:58:35,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 11:58:35,327 INFO L93 Difference]: Finished difference Result 91 states and 154 transitions. [2020-10-29 11:58:35,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 11:58:35,328 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-10-29 11:58:35,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 11:58:35,331 INFO L225 Difference]: With dead ends: 91 [2020-10-29 11:58:35,331 INFO L226 Difference]: Without dead ends: 53 [2020-10-29 11:58:35,333 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-29 11:58:35,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-29 11:58:35,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-29 11:58:35,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-29 11:58:35,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 77 transitions. [2020-10-29 11:58:35,350 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 77 transitions. Word has length 31 [2020-10-29 11:58:35,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 11:58:35,350 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 77 transitions. [2020-10-29 11:58:35,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 11:58:35,350 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 77 transitions. [2020-10-29 11:58:35,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-29 11:58:35,353 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 11:58:35,353 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 11:58:35,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 11:58:35,353 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 11:58:35,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 11:58:35,354 INFO L82 PathProgramCache]: Analyzing trace with hash -561126020, now seen corresponding path program 1 times [2020-10-29 11:58:35,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 11:58:35,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2012768388] [2020-10-29 11:58:35,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 11:58:35,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-29 11:58:35,371 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-29 11:58:35,372 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-29 11:58:35,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 11:58:35,395 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.10 11:58:35 BoogieIcfgContainer [2020-10-29 11:58:35,395 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-29 11:58:35,398 INFO L168 Benchmark]: Toolchain (without parser) took 3674.79 ms. Allocated memory was 164.6 MB in the beginning and 198.2 MB in the end (delta: 33.6 MB). Free memory was 140.1 MB in the beginning and 107.2 MB in the end (delta: 32.9 MB). Peak memory consumption was 68.0 MB. Max. memory is 8.0 GB. [2020-10-29 11:58:35,398 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 125.8 MB. Free memory is still 100.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-29 11:58:35,399 INFO L168 Benchmark]: CACSL2BoogieTranslator took 343.16 ms. Allocated memory is still 164.6 MB. Free memory was 139.4 MB in the beginning and 130.3 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-29 11:58:35,400 INFO L168 Benchmark]: Boogie Preprocessor took 35.82 ms. Allocated memory is still 164.6 MB. Free memory was 130.3 MB in the beginning and 129.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-29 11:58:35,401 INFO L168 Benchmark]: RCFGBuilder took 338.09 ms. Allocated memory is still 164.6 MB. Free memory was 128.8 MB in the beginning and 115.1 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2020-10-29 11:58:35,402 INFO L168 Benchmark]: TraceAbstraction took 2942.01 ms. Allocated memory was 164.6 MB in the beginning and 198.2 MB in the end (delta: 33.6 MB). Free memory was 114.7 MB in the beginning and 107.2 MB in the end (delta: 7.5 MB). Peak memory consumption was 41.8 MB. Max. memory is 8.0 GB. [2020-10-29 11:58:35,405 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 125.8 MB. Free memory is still 100.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 343.16 ms. Allocated memory is still 164.6 MB. Free memory was 139.4 MB in the beginning and 130.3 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 35.82 ms. Allocated memory is still 164.6 MB. Free memory was 130.3 MB in the beginning and 129.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 338.09 ms. Allocated memory is still 164.6 MB. Free memory was 128.8 MB in the beginning and 115.1 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2942.01 ms. Allocated memory was 164.6 MB in the beginning and 198.2 MB in the end (delta: 33.6 MB). Free memory was 114.7 MB in the beginning and 107.2 MB in the end (delta: 7.5 MB). Peak memory consumption was 41.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L28] int m = __VERIFIER_nondet_int(); [L29] COND FALSE !(m < 0 || m > 3) [L34] int n = __VERIFIER_nondet_int(); [L35] COND FALSE !(n < 0 || n > 23) [L41] CALL, EXPR ackermann(m,n) [L17] COND FALSE !(m==0) [L20] COND TRUE n==0 [L21] CALL, EXPR ackermann(m-1,1) [L17] COND FALSE !(m==0) [L20] COND FALSE !(n==0) [L23] CALL, EXPR ackermann(m,n-1) [L17] COND FALSE !(m==0) [L20] COND TRUE n==0 [L21] CALL, EXPR ackermann(m-1,1) [L17] COND TRUE m==0 [L18] return n+1; [L21] RET, EXPR ackermann(m-1,1) [L21] return ackermann(m-1,1); [L23] RET, EXPR ackermann(m,n-1) [L23] CALL, EXPR ackermann(m-1,ackermann(m,n-1)) [L17] COND TRUE m==0 [L18] return n+1; [L23] RET, EXPR ackermann(m-1,ackermann(m,n-1)) [L23] return ackermann(m-1,ackermann(m,n-1)); [L21] RET, EXPR ackermann(m-1,1) [L21] return ackermann(m-1,1); [L41] RET, EXPR ackermann(m,n) [L41] int result = ackermann(m,n); [L42] COND FALSE !(m < 2 || result >= 4) [L45] CALL reach_error() [L3] __assert_fail("0", "Ackermann02.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.7s, OverallIterations: 4, TraceHistogramMax: 5, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 80 SDtfs, 109 SDslu, 63 SDs, 0 SdLazy, 242 SolverSat, 89 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=53occurred in iteration=3, 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, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 116 NumberOfCodeBlocks, 116 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 69 ConstructedInterpolants, 0 QuantifiedInterpolants, 4973 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 15/19 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...