/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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-simple/id2_b3_o2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 17:23:28,011 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 17:23:28,015 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 17:23:28,068 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 17:23:28,068 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 17:23:28,075 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 17:23:28,077 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 17:23:28,081 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 17:23:28,084 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 17:23:28,091 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 17:23:28,093 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 17:23:28,094 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 17:23:28,094 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 17:23:28,098 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 17:23:28,102 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 17:23:28,104 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 17:23:28,105 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 17:23:28,109 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 17:23:28,130 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 17:23:28,134 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 17:23:28,138 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 17:23:28,139 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 17:23:28,141 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 17:23:28,143 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 17:23:28,149 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 17:23:28,150 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 17:23:28,154 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 17:23:28,156 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 17:23:28,157 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 17:23:28,158 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 17:23:28,158 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 17:23:28,159 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 17:23:28,159 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 17:23:28,161 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 17:23:28,162 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 17:23:28,163 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 17:23:28,163 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 17:23:28,163 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 17:23:28,164 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 17:23:28,165 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 17:23:28,165 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 17:23:28,172 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 [2020-10-28 17:23:28,218 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 17:23:28,218 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 17:23:28,222 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 17:23:28,222 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 17:23:28,222 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 17:23:28,222 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 17:23:28,222 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 17:23:28,223 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 17:23:28,223 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 17:23:28,223 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 17:23:28,224 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 17:23:28,224 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 17:23:28,224 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 17:23:28,225 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 17:23:28,225 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 17:23:28,225 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 17:23:28,225 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 17:23:28,225 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 17:23:28,226 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 17:23:28,226 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 17:23:28,226 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 17:23:28,226 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 17:23:28,226 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 17:23:28,227 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 17:23:28,227 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 17:23:28,227 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 17:23:28,227 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 17:23:28,227 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 17:23:28,227 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 17:23:28,228 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 17:23:28,655 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 17:23:28,697 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 17:23:28,699 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 17:23:28,701 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 17:23:28,701 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 17:23:28,702 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id2_b3_o2.c [2020-10-28 17:23:28,789 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2421688b4/487095b557dc4d85b28dd178d3b56543/FLAGd9a840a84 [2020-10-28 17:23:29,393 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 17:23:29,393 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id2_b3_o2.c [2020-10-28 17:23:29,400 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2421688b4/487095b557dc4d85b28dd178d3b56543/FLAGd9a840a84 [2020-10-28 17:23:29,746 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2421688b4/487095b557dc4d85b28dd178d3b56543 [2020-10-28 17:23:29,749 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 17:23:29,756 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 17:23:29,759 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 17:23:29,759 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 17:23:29,763 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 17:23:29,764 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 05:23:29" (1/1) ... [2020-10-28 17:23:29,767 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@488c1b3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:23:29, skipping insertion in model container [2020-10-28 17:23:29,768 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 05:23:29" (1/1) ... [2020-10-28 17:23:29,776 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 17:23:29,794 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 17:23:29,949 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 17:23:29,960 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 17:23:29,979 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 17:23:29,996 INFO L208 MainTranslator]: Completed translation [2020-10-28 17:23:29,996 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:23:29 WrapperNode [2020-10-28 17:23:29,997 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 17:23:29,998 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 17:23:29,998 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 17:23:29,998 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 17:23:30,012 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:23:29" (1/1) ... [2020-10-28 17:23:30,012 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:23:29" (1/1) ... [2020-10-28 17:23:30,020 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:23:29" (1/1) ... [2020-10-28 17:23:30,020 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:23:29" (1/1) ... [2020-10-28 17:23:30,026 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:23:29" (1/1) ... [2020-10-28 17:23:30,028 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:23:29" (1/1) ... [2020-10-28 17:23:30,030 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:23:29" (1/1) ... [2020-10-28 17:23:30,032 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 17:23:30,033 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 17:23:30,033 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 17:23:30,033 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 17:23:30,034 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:23:29" (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 [2020-10-28 17:23:30,113 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 17:23:30,113 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 17:23:30,113 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 17:23:30,114 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-10-28 17:23:30,114 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2020-10-28 17:23:30,114 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 17:23:30,114 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-28 17:23:30,114 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 17:23:30,115 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 17:23:30,115 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 17:23:30,115 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 17:23:30,115 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-10-28 17:23:30,115 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2020-10-28 17:23:30,116 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 17:23:30,116 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 17:23:30,116 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 17:23:30,116 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 17:23:30,116 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 17:23:30,117 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 17:23:30,117 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 17:23:30,426 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 17:23:30,426 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 17:23:30,429 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 05:23:30 BoogieIcfgContainer [2020-10-28 17:23:30,429 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 17:23:30,432 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 17:23:30,432 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 17:23:30,437 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 17:23:30,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 05:23:29" (1/3) ... [2020-10-28 17:23:30,438 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bc08b77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 05:23:30, skipping insertion in model container [2020-10-28 17:23:30,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:23:29" (2/3) ... [2020-10-28 17:23:30,439 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bc08b77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 05:23:30, skipping insertion in model container [2020-10-28 17:23:30,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 05:23:30" (3/3) ... [2020-10-28 17:23:30,441 INFO L111 eAbstractionObserver]: Analyzing ICFG id2_b3_o2.c [2020-10-28 17:23:30,456 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 17:23:30,463 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 17:23:30,495 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 17:23:30,559 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 17:23:30,560 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 17:23:30,560 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 17:23:30,560 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 17:23:30,560 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 17:23:30,561 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 17:23:30,561 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 17:23:30,561 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 17:23:30,583 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-28 17:23:30,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-28 17:23:30,590 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:23:30,591 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 17:23:30,591 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:23:30,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:23:30,624 INFO L82 PathProgramCache]: Analyzing trace with hash 791772439, now seen corresponding path program 1 times [2020-10-28 17:23:30,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:23:30,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1836218557] [2020-10-28 17:23:30,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:23:30,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:23:30,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:23:31,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:23:31,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 17:23:31,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:23:31,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 333 [2020-10-28 17:23:31,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:23:31,136 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:23:31,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 17:23:31,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 17:23:31,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 17:23:31,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 17:23:31,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:23:31,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:23:31,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:23:31,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:23:31,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:23:31,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:23:31,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 17:23:31,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:23:31,288 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:23:31,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:23:31,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:23:31,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:23:31,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 17:23:31,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 17:23:31,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:23:31,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:23:31,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:23:31,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 17:23:31,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:23:31,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 17:23:31,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:23:31,328 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:23:31,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 17:23:31,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:23:31,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 17:23:31,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 17:23:31,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 17:23:31,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1836218557] [2020-10-28 17:23:31,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 17:23:31,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 17:23:31,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288083182] [2020-10-28 17:23:31,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 17:23:31,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:23:31,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 17:23:31,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 17:23:31,377 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 6 states. [2020-10-28 17:23:31,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:23:31,678 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2020-10-28 17:23:31,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 17:23:31,680 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-10-28 17:23:31,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:23:31,691 INFO L225 Difference]: With dead ends: 46 [2020-10-28 17:23:31,691 INFO L226 Difference]: Without dead ends: 28 [2020-10-28 17:23:31,696 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-28 17:23:31,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-28 17:23:31,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-28 17:23:31,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-28 17:23:31,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-10-28 17:23:31,769 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 15 [2020-10-28 17:23:31,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:23:31,770 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-10-28 17:23:31,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 17:23:31,771 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-10-28 17:23:31,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 17:23:31,774 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:23:31,775 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] [2020-10-28 17:23:31,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 17:23:31,776 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:23:31,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:23:31,780 INFO L82 PathProgramCache]: Analyzing trace with hash 2001775916, now seen corresponding path program 1 times [2020-10-28 17:23:31,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:23:31,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [978476655] [2020-10-28 17:23:31,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:23:31,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:23:31,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:23:31,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:23:32,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:23:32,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 17:23:32,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:23:32,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 482 [2020-10-28 17:23:32,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:23:32,311 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:23:32,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 17:23:32,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 17:23:32,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 17:23:32,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 17:23:32,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:23:32,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:23:32,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:23:32,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:23:32,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:23:32,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:23:32,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 17:23:32,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:23:32,378 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:23:32,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:23:32,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:23:32,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:23:32,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 17:23:32,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 17:23:32,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:23:32,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:23:32,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:23:32,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-28 17:23:32,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:23:32,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-28 17:23:32,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:23:32,427 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:23:32,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 17:23:32,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-10-28 17:23:32,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 17:23:32,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 17:23:32,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-28 17:23:32,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:23:32,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:23:32,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:23:32,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 17:23:32,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:23:32,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 17:23:32,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:23:32,511 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:23:32,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 17:23:32,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:23:32,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 17:23:32,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 17:23:32,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 17:23:32,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [978476655] [2020-10-28 17:23:32,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 17:23:32,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 17:23:32,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293000730] [2020-10-28 17:23:32,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 17:23:32,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:23:32,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 17:23:32,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 17:23:32,534 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 6 states. [2020-10-28 17:23:32,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:23:32,777 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2020-10-28 17:23:32,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 17:23:32,778 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-28 17:23:32,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:23:32,779 INFO L225 Difference]: With dead ends: 47 [2020-10-28 17:23:32,779 INFO L226 Difference]: Without dead ends: 34 [2020-10-28 17:23:32,781 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-28 17:23:32,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-28 17:23:32,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-10-28 17:23:32,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-28 17:23:32,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-10-28 17:23:32,791 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 22 [2020-10-28 17:23:32,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:23:32,791 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-10-28 17:23:32,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 17:23:32,791 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-10-28 17:23:32,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 17:23:32,793 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:23:32,793 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] [2020-10-28 17:23:32,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 17:23:32,793 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:23:32,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:23:32,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1405687699, now seen corresponding path program 1 times [2020-10-28 17:23:32,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:23:32,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [74569201] [2020-10-28 17:23:32,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:23:32,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:23:32,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:23:32,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:23:32,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 17:23:32,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:23:32,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 147 [2020-10-28 17:23:32,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:23:32,958 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:23:32,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 17:23:32,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 17:23:32,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 17:23:32,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:23:33,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:23:33,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:23:33,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:23:33,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:23:33,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:23:33,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:23:33,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 17:23:33,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:23:33,050 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:23:33,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:23:33,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:23:33,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:23:33,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:23:33,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 17:23:33,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:23:33,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:23:33,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:23:33,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-28 17:23:33,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:23:33,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-28 17:23:33,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:23:33,088 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:23:33,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 17:23:33,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:23:33,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 17:23:33,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:23:33,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-28 17:23:33,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:23:33,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:23:33,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:23:33,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 17:23:33,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:23:33,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 17:23:33,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:23:33,141 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:23:33,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 17:23:33,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:23:33,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 17:23:33,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 17:23:33,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 17:23:33,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [74569201] [2020-10-28 17:23:33,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 17:23:33,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-28 17:23:33,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055932040] [2020-10-28 17:23:33,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 17:23:33,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:23:33,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 17:23:33,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-28 17:23:33,163 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 9 states. [2020-10-28 17:23:33,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:23:33,638 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2020-10-28 17:23:33,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 17:23:33,638 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-10-28 17:23:33,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:23:33,640 INFO L225 Difference]: With dead ends: 39 [2020-10-28 17:23:33,640 INFO L226 Difference]: Without dead ends: 34 [2020-10-28 17:23:33,641 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-10-28 17:23:33,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-28 17:23:33,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-10-28 17:23:33,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-28 17:23:33,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-10-28 17:23:33,649 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 22 [2020-10-28 17:23:33,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:23:33,650 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-10-28 17:23:33,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 17:23:33,650 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-10-28 17:23:33,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 17:23:33,651 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:23:33,651 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] [2020-10-28 17:23:33,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 17:23:33,652 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:23:33,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:23:33,652 INFO L82 PathProgramCache]: Analyzing trace with hash 20115896, now seen corresponding path program 1 times [2020-10-28 17:23:33,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:23:33,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [615510841] [2020-10-28 17:23:33,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:23:33,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:23:33,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:23:33,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:23:33,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:23:33,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 17:23:33,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:23:33,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 281 [2020-10-28 17:23:33,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:23:33,948 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:23:33,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 17:23:33,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-28 17:23:33,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 17:23:33,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:23:33,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:23:33,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:23:33,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:23:33,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:23:33,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:23:33,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:23:33,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 17:23:33,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:23:33,998 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:23:33,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:23:33,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:23:33,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:23:33,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:23:34,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 17:23:34,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:23:34,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:23:34,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:23:34,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 17:23:34,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:23:34,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-28 17:23:34,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:23:34,059 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:23:34,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 17:23:34,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 17:23:34,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 17:23:34,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:23:34,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-28 17:23:34,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:23:34,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:23:34,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:23:34,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-28 17:23:34,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:23:34,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 17:23:34,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:23:34,091 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:23:34,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 17:23:34,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-10-28 17:23:34,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 17:23:34,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:23:34,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-28 17:23:34,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:23:34,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:23:34,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:23:34,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 17:23:34,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:23:34,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 17:23:34,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:23:34,135 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:23:34,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 17:23:34,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:23:34,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 17:23:34,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:23:34,152 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 17:23:34,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [615510841] [2020-10-28 17:23:34,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 17:23:34,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 17:23:34,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412515116] [2020-10-28 17:23:34,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 17:23:34,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:23:34,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 17:23:34,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 17:23:34,155 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 6 states. [2020-10-28 17:23:34,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:23:34,396 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2020-10-28 17:23:34,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 17:23:34,396 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-10-28 17:23:34,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:23:34,398 INFO L225 Difference]: With dead ends: 51 [2020-10-28 17:23:34,398 INFO L226 Difference]: Without dead ends: 38 [2020-10-28 17:23:34,399 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-28 17:23:34,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-28 17:23:34,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2020-10-28 17:23:34,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-28 17:23:34,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-10-28 17:23:34,407 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 29 [2020-10-28 17:23:34,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:23:34,407 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-10-28 17:23:34,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 17:23:34,407 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-10-28 17:23:34,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 17:23:34,408 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:23:34,409 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] [2020-10-28 17:23:34,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 17:23:34,409 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:23:34,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:23:34,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1776835463, now seen corresponding path program 1 times [2020-10-28 17:23:34,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:23:34,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1048407561] [2020-10-28 17:23:34,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:23:34,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:23:34,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:23:34,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:23:34,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:23:34,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 17:23:34,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:23:34,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 364 [2020-10-28 17:23:34,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:23:34,788 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:23:34,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 17:23:34,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-28 17:23:34,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 17:23:34,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:23:34,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:23:34,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:23:34,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:23:34,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:23:34,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:23:34,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:23:34,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 17:23:34,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:23:34,860 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:23:34,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:23:34,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:23:34,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:23:34,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:23:34,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 17:23:34,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:23:34,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:23:34,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:23:34,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:23:34,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 17:23:34,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:23:34,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 119 [2020-10-28 17:23:34,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:23:34,989 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:23:34,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 17:23:34,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:23:34,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 17:23:34,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:23:35,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-28 17:23:35,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:23:35,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:23:35,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:23:35,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-28 17:23:35,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:23:35,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 17:23:35,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:23:35,014 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:23:35,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:23:35,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:23:35,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:23:35,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:23:35,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-28 17:23:35,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:23:35,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:23:35,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:23:35,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 17:23:35,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:23:35,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 17:23:35,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:23:35,022 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:23:35,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:23:35,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:23:35,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:23:35,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 17:23:35,026 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 17:23:35,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1048407561] [2020-10-28 17:23:35,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 17:23:35,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 17:23:35,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562943518] [2020-10-28 17:23:35,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 17:23:35,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:23:35,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 17:23:35,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 17:23:35,029 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 6 states. [2020-10-28 17:23:35,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:23:35,250 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2020-10-28 17:23:35,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 17:23:35,250 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-10-28 17:23:35,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:23:35,251 INFO L225 Difference]: With dead ends: 43 [2020-10-28 17:23:35,252 INFO L226 Difference]: Without dead ends: 38 [2020-10-28 17:23:35,252 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-28 17:23:35,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-28 17:23:35,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2020-10-28 17:23:35,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-28 17:23:35,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-10-28 17:23:35,260 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 29 [2020-10-28 17:23:35,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:23:35,260 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-10-28 17:23:35,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 17:23:35,261 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-10-28 17:23:35,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 17:23:35,262 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:23:35,262 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] [2020-10-28 17:23:35,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 17:23:35,262 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:23:35,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:23:35,263 INFO L82 PathProgramCache]: Analyzing trace with hash -889331782, now seen corresponding path program 1 times [2020-10-28 17:23:35,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:23:35,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [480697708] [2020-10-28 17:23:35,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:23:35,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-28 17:23:35,276 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-28 17:23:35,277 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-28 17:23:35,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 17:23:35,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 05:23:35 BoogieIcfgContainer [2020-10-28 17:23:35,300 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-28 17:23:35,302 INFO L168 Benchmark]: Toolchain (without parser) took 5550.19 ms. Allocated memory was 167.8 MB in the beginning and 217.1 MB in the end (delta: 49.3 MB). Free memory was 143.2 MB in the beginning and 102.3 MB in the end (delta: 41.0 MB). Peak memory consumption was 91.5 MB. Max. memory is 8.0 GB. [2020-10-28 17:23:35,303 INFO L168 Benchmark]: CDTParser took 0.59 ms. Allocated memory is still 167.8 MB. Free memory is still 139.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-28 17:23:35,304 INFO L168 Benchmark]: CACSL2BoogieTranslator took 238.04 ms. Allocated memory is still 167.8 MB. Free memory was 142.6 MB in the beginning and 132.9 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-28 17:23:35,304 INFO L168 Benchmark]: Boogie Preprocessor took 34.02 ms. Allocated memory is still 167.8 MB. Free memory was 132.9 MB in the beginning and 131.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-28 17:23:35,305 INFO L168 Benchmark]: RCFGBuilder took 396.39 ms. Allocated memory is still 167.8 MB. Free memory was 131.5 MB in the beginning and 117.7 MB in the end (delta: 13.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2020-10-28 17:23:35,306 INFO L168 Benchmark]: TraceAbstraction took 4868.08 ms. Allocated memory was 167.8 MB in the beginning and 217.1 MB in the end (delta: 49.3 MB). Free memory was 117.2 MB in the beginning and 102.3 MB in the end (delta: 15.0 MB). Peak memory consumption was 65.3 MB. Max. memory is 8.0 GB. [2020-10-28 17:23:35,310 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.59 ms. Allocated memory is still 167.8 MB. Free memory is still 139.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 238.04 ms. Allocated memory is still 167.8 MB. Free memory was 142.6 MB in the beginning and 132.9 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 34.02 ms. Allocated memory is still 167.8 MB. Free memory was 132.9 MB in the beginning and 131.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 396.39 ms. Allocated memory is still 167.8 MB. Free memory was 131.5 MB in the beginning and 117.7 MB in the end (delta: 13.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4868.08 ms. Allocated memory was 167.8 MB in the beginning and 217.1 MB in the end (delta: 49.3 MB). Free memory was 117.2 MB in the beginning and 102.3 MB in the end (delta: 15.0 MB). Peak memory consumption was 65.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L24] unsigned int input = __VERIFIER_nondet_uint(); [L25] CALL, EXPR id(input) [L10] COND FALSE !(x==0) [L11] CALL, EXPR id2(x-1) [L17] COND FALSE !(x==0) [L18] CALL, EXPR id(x-1) [L10] COND TRUE x==0 [L10] return 0; [L18] RET, EXPR id(x-1) [L18] unsigned int ret = id(x-1) + 1; [L19] COND FALSE !(ret > 3) [L20] return ret; [L11] RET, EXPR id2(x-1) [L11] unsigned int ret = id2(x-1) + 1; [L12] COND FALSE !(ret > 3) [L13] return ret; [L25] RET, EXPR id(input) [L25] unsigned int result = id(input); [L26] COND TRUE result == 2 [L27] CALL reach_error() [L4] __assert_fail("0", "id2_b3_o2.c", 4, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.7s, OverallIterations: 6, TraceHistogramMax: 2, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 128 SDtfs, 109 SDslu, 161 SDs, 0 SdLazy, 462 SolverSat, 31 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 82 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred 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, 5 MinimizatonAttempts, 8 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.6s InterpolantComputationTime, 146 NumberOfCodeBlocks, 146 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 112 ConstructedInterpolants, 0 QuantifiedInterpolants, 9310 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 8/8 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...