/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-simple/id_o3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 12:11:34,141 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 12:11:34,144 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 12:11:34,184 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 12:11:34,184 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 12:11:34,186 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 12:11:34,188 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 12:11:34,190 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 12:11:34,193 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 12:11:34,194 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 12:11:34,196 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 12:11:34,197 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 12:11:34,198 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 12:11:34,199 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 12:11:34,200 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 12:11:34,202 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 12:11:34,203 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 12:11:34,204 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 12:11:34,206 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 12:11:34,209 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 12:11:34,211 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 12:11:34,214 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 12:11:34,218 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 12:11:34,220 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 12:11:34,236 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 12:11:34,237 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 12:11:34,237 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 12:11:34,242 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 12:11:34,242 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 12:11:34,246 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 12:11:34,246 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 12:11:34,247 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 12:11:34,248 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 12:11:34,249 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 12:11:34,251 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 12:11:34,252 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 12:11:34,252 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 12:11:34,253 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 12:11:34,253 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 12:11:34,255 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 12:11:34,256 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 12:11:34,257 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 12:11:34,313 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 12:11:34,314 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 12:11:34,318 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 12:11:34,318 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 12:11:34,318 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 12:11:34,318 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 12:11:34,319 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 12:11:34,319 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 12:11:34,319 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 12:11:34,319 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 12:11:34,319 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 12:11:34,319 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 12:11:34,320 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 12:11:34,320 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 12:11:34,321 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 12:11:34,321 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 12:11:34,322 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 12:11:34,322 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 12:11:34,322 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 12:11:34,323 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 12:11:34,323 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 12:11:34,323 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 12:11:34,323 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 12:11:34,323 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 12:11:34,324 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 12:11:34,324 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 12:11:34,324 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 12:11:34,324 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 12:11:34,325 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 12:11:34,325 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 12:11:34,818 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 12:11:34,854 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 12:11:34,858 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 12:11:34,859 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 12:11:34,863 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 12:11:34,866 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_o3.c [2020-10-29 12:11:34,963 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5838debad/9c6d5b985b804ffca85e499f5e48ea70/FLAGde6fd4b15 [2020-10-29 12:11:35,577 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 12:11:35,578 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id_o3.c [2020-10-29 12:11:35,586 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5838debad/9c6d5b985b804ffca85e499f5e48ea70/FLAGde6fd4b15 [2020-10-29 12:11:35,951 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5838debad/9c6d5b985b804ffca85e499f5e48ea70 [2020-10-29 12:11:35,954 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 12:11:35,961 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 12:11:35,963 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 12:11:35,963 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 12:11:35,968 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 12:11:35,969 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 12:11:35" (1/1) ... [2020-10-29 12:11:35,972 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@514f6498 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:11:35, skipping insertion in model container [2020-10-29 12:11:35,973 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 12:11:35" (1/1) ... [2020-10-29 12:11:35,981 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 12:11:35,996 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 12:11:36,153 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 12:11:36,165 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 12:11:36,182 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 12:11:36,199 INFO L208 MainTranslator]: Completed translation [2020-10-29 12:11:36,200 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:11:36 WrapperNode [2020-10-29 12:11:36,200 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 12:11:36,202 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 12:11:36,202 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 12:11:36,202 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 12:11:36,216 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:11:36" (1/1) ... [2020-10-29 12:11:36,217 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:11:36" (1/1) ... [2020-10-29 12:11:36,225 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:11:36" (1/1) ... [2020-10-29 12:11:36,225 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:11:36" (1/1) ... [2020-10-29 12:11:36,231 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:11:36" (1/1) ... [2020-10-29 12:11:36,233 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:11:36" (1/1) ... [2020-10-29 12:11:36,234 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:11:36" (1/1) ... [2020-10-29 12:11:36,236 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 12:11:36,238 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 12:11:36,238 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 12:11:36,238 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 12:11:36,239 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:11:36" (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 12:11:36,325 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 12:11:36,325 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 12:11:36,325 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 12:11:36,326 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-10-29 12:11:36,326 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 12:11:36,326 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-29 12:11:36,326 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 12:11:36,326 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 12:11:36,327 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 12:11:36,327 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 12:11:36,327 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-10-29 12:11:36,327 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 12:11:36,327 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 12:11:36,327 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 12:11:36,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 12:11:36,328 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 12:11:36,328 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 12:11:36,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 12:11:36,576 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 12:11:36,576 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 12:11:36,578 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 12:11:36 BoogieIcfgContainer [2020-10-29 12:11:36,579 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 12:11:36,580 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 12:11:36,581 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 12:11:36,584 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 12:11:36,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 12:11:35" (1/3) ... [2020-10-29 12:11:36,586 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5afce07a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 12:11:36, skipping insertion in model container [2020-10-29 12:11:36,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:11:36" (2/3) ... [2020-10-29 12:11:36,586 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5afce07a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 12:11:36, skipping insertion in model container [2020-10-29 12:11:36,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 12:11:36" (3/3) ... [2020-10-29 12:11:36,588 INFO L111 eAbstractionObserver]: Analyzing ICFG id_o3.c [2020-10-29 12:11:36,602 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 12:11:36,608 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 12:11:36,624 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 12:11:36,655 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 12:11:36,655 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 12:11:36,655 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 12:11:36,656 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 12:11:36,656 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 12:11:36,656 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 12:11:36,656 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 12:11:36,656 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 12:11:36,677 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-29 12:11:36,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-29 12:11:36,684 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 12:11:36,685 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 12:11:36,685 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 12:11:36,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 12:11:36,693 INFO L82 PathProgramCache]: Analyzing trace with hash 560135365, now seen corresponding path program 1 times [2020-10-29 12:11:36,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 12:11:36,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [154512754] [2020-10-29 12:11:36,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 12:11:36,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:11:36,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:11:37,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:11:37,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-29 12:11:37,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:11:37,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 393 [2020-10-29 12:11:37,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:11:37,273 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:11:37,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 12:11:37,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 12:11:37,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-29 12:11:37,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 12:11:37,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 12:11:37,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:11:37,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:11:37,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:11:37,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 12:11:37,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:11:37,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 12:11:37,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:11:37,435 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:11:37,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 12:11:37,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 12:11:37,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 12:11:37,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 12:11:37,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-29 12:11:37,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:11:37,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:11:37,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:11:37,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 12:11:37,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:11:37,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 12:11:37,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:11:37,468 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:11:37,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 12:11:37,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 12:11:37,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-29 12:11:37,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 12:11:37,543 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 12:11:37,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [154512754] [2020-10-29 12:11:37,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 12:11:37,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 12:11:37,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381857034] [2020-10-29 12:11:37,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 12:11:37,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 12:11:37,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 12:11:37,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 12:11:37,569 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 6 states. [2020-10-29 12:11:37,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 12:11:37,840 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2020-10-29 12:11:37,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 12:11:37,842 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-10-29 12:11:37,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 12:11:37,853 INFO L225 Difference]: With dead ends: 38 [2020-10-29 12:11:37,853 INFO L226 Difference]: Without dead ends: 20 [2020-10-29 12:11:37,857 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 [2020-10-29 12:11:37,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-29 12:11:37,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-29 12:11:37,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-29 12:11:37,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-10-29 12:11:37,906 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 15 [2020-10-29 12:11:37,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 12:11:37,907 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-10-29 12:11:37,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 12:11:37,907 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-10-29 12:11:37,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-29 12:11:37,909 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 12:11:37,909 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 12:11:37,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 12:11:37,910 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 12:11:37,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 12:11:37,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1295611761, now seen corresponding path program 1 times [2020-10-29 12:11:37,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 12:11:37,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [750851114] [2020-10-29 12:11:37,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 12:11:37,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:11:37,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:11:38,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:11:38,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-29 12:11:38,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:11:38,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 229 [2020-10-29 12:11:38,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:11:38,164 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:11:38,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 12:11:38,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-29 12:11:38,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-29 12:11:38,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 12:11:38,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 12:11:38,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:11:38,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:11:38,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:11:38,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 12:11:38,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:11:38,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 12:11:38,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:11:38,274 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:11:38,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 12:11:38,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 12:11:38,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 12:11:38,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 12:11:38,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-29 12:11:38,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:11:38,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:11:38,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:11:38,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-29 12:11:38,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:11:38,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 101 [2020-10-29 12:11:38,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:11:38,389 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:11:38,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 12:11:38,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 12:11:38,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 12:11:38,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 12:11:38,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-29 12:11:38,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:11:38,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:11:38,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:11:38,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 12:11:38,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:11:38,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-29 12:11:38,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:11:38,469 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:11:38,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 12:11:38,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 12:11:38,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-29 12:11:38,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 12:11:38,502 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 12:11:38,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [750851114] [2020-10-29 12:11:38,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 12:11:38,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 12:11:38,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915158824] [2020-10-29 12:11:38,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 12:11:38,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 12:11:38,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 12:11:38,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-29 12:11:38,508 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 8 states. [2020-10-29 12:11:38,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 12:11:38,900 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-10-29 12:11:38,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 12:11:38,901 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-10-29 12:11:38,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 12:11:38,902 INFO L225 Difference]: With dead ends: 28 [2020-10-29 12:11:38,903 INFO L226 Difference]: Without dead ends: 23 [2020-10-29 12:11:38,904 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-29 12:11:38,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-29 12:11:38,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-29 12:11:38,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-29 12:11:38,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-10-29 12:11:38,915 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 21 [2020-10-29 12:11:38,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 12:11:38,916 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-10-29 12:11:38,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 12:11:38,916 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-10-29 12:11:38,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-29 12:11:38,917 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 12:11:38,917 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 12:11:38,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 12:11:38,918 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 12:11:38,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 12:11:38,919 INFO L82 PathProgramCache]: Analyzing trace with hash -116387003, now seen corresponding path program 2 times [2020-10-29 12:11:38,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 12:11:38,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [16011848] [2020-10-29 12:11:38,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 12:11:38,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:11:38,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:11:39,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:11:39,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-29 12:11:39,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:11:39,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 201 [2020-10-29 12:11:39,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:11:39,137 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:11:39,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 12:11:39,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-29 12:11:39,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-29 12:11:39,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 12:11:39,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 12:11:39,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:11:39,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:11:39,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:11:39,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 12:11:39,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:11:39,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 12:11:39,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:11:39,216 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:11:39,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 12:11:39,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 12:11:39,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 12:11:39,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 12:11:39,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-29 12:11:39,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:11:39,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:11:39,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:11:39,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-29 12:11:39,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:11:39,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 115 [2020-10-29 12:11:39,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:11:39,346 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:11:39,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 12:11:39,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 12:11:39,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-29 12:11:39,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 12:11:39,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-29 12:11:39,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:11:39,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:11:39,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:11:39,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-29 12:11:39,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:11:39,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-10-29 12:11:39,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:11:39,485 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:11:39,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 12:11:39,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 12:11:39,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 12:11:39,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 12:11:39,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-29 12:11:39,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:11:39,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:11:39,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:11:39,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 12:11:39,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:11:39,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 12:11:39,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:11:39,563 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:11:39,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 12:11:39,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 12:11:39,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-29 12:11:39,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 12:11:39,583 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-29 12:11:39,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [16011848] [2020-10-29 12:11:39,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 12:11:39,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 12:11:39,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889253878] [2020-10-29 12:11:39,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 12:11:39,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 12:11:39,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 12:11:39,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-29 12:11:39,586 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 10 states. [2020-10-29 12:11:40,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 12:11:40,020 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-10-29 12:11:40,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 12:11:40,021 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-29 12:11:40,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 12:11:40,022 INFO L225 Difference]: With dead ends: 31 [2020-10-29 12:11:40,022 INFO L226 Difference]: Without dead ends: 26 [2020-10-29 12:11:40,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-10-29 12:11:40,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-29 12:11:40,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-29 12:11:40,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-29 12:11:40,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-10-29 12:11:40,031 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 27 [2020-10-29 12:11:40,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 12:11:40,031 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-10-29 12:11:40,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 12:11:40,032 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-10-29 12:11:40,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-29 12:11:40,033 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 12:11:40,033 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 12:11:40,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 12:11:40,034 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 12:11:40,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 12:11:40,034 INFO L82 PathProgramCache]: Analyzing trace with hash -738125937, now seen corresponding path program 3 times [2020-10-29 12:11:40,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 12:11:40,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1161628745] [2020-10-29 12:11:40,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 12:11:40,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-29 12:11:40,051 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-29 12:11:40,051 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-29 12:11:40,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 12:11:40,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.10 12:11:40 BoogieIcfgContainer [2020-10-29 12:11:40,077 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-29 12:11:40,081 INFO L168 Benchmark]: Toolchain (without parser) took 4122.17 ms. Allocated memory was 153.1 MB in the beginning and 203.4 MB in the end (delta: 50.3 MB). Free memory was 128.5 MB in the beginning and 107.0 MB in the end (delta: 21.4 MB). Peak memory consumption was 72.5 MB. Max. memory is 8.0 GB. [2020-10-29 12:11:40,082 INFO L168 Benchmark]: CDTParser took 1.50 ms. Allocated memory is still 153.1 MB. Free memory is still 126.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-29 12:11:40,084 INFO L168 Benchmark]: CACSL2BoogieTranslator took 237.98 ms. Allocated memory is still 153.1 MB. Free memory was 127.9 MB in the beginning and 118.8 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-10-29 12:11:40,087 INFO L168 Benchmark]: Boogie Preprocessor took 35.07 ms. Allocated memory is still 153.1 MB. Free memory was 118.8 MB in the beginning and 117.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-29 12:11:40,090 INFO L168 Benchmark]: RCFGBuilder took 340.99 ms. Allocated memory is still 153.1 MB. Free memory was 117.2 MB in the beginning and 104.9 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-10-29 12:11:40,093 INFO L168 Benchmark]: TraceAbstraction took 3496.37 ms. Allocated memory was 153.1 MB in the beginning and 203.4 MB in the end (delta: 50.3 MB). Free memory was 104.4 MB in the beginning and 107.0 MB in the end (delta: -2.6 MB). Peak memory consumption was 48.4 MB. Max. memory is 8.0 GB. [2020-10-29 12:11:40,104 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.50 ms. Allocated memory is still 153.1 MB. Free memory is still 126.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 237.98 ms. Allocated memory is still 153.1 MB. Free memory was 127.9 MB in the beginning and 118.8 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 35.07 ms. Allocated memory is still 153.1 MB. Free memory was 118.8 MB in the beginning and 117.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 340.99 ms. Allocated memory is still 153.1 MB. Free memory was 117.2 MB in the beginning and 104.9 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3496.37 ms. Allocated memory was 153.1 MB in the beginning and 203.4 MB in the end (delta: 50.3 MB). Free memory was 104.4 MB in the beginning and 107.0 MB in the end (delta: -2.6 MB). Peak memory consumption was 48.4 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: [L12] unsigned int input = __VERIFIER_nondet_uint(); [L13] CALL, EXPR id(input) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND TRUE x==0 [L7] return 0; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L13] RET, EXPR id(input) [L13] unsigned int result = id(input); [L14] COND TRUE result == 3 [L15] CALL reach_error() [L4] __assert_fail("0", "id_o3.c", 4, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.4s, OverallIterations: 4, TraceHistogramMax: 4, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 49 SDtfs, 39 SDslu, 118 SDs, 0 SdLazy, 241 SolverSat, 18 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred 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, 1.8s InterpolantComputationTime, 96 NumberOfCodeBlocks, 96 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 60 ConstructedInterpolants, 0 QuantifiedInterpolants, 5840 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 9/18 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...