/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_2-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 13:22:27,226 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 13:22:27,231 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 13:22:27,276 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 13:22:27,276 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 13:22:27,284 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 13:22:27,286 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 13:22:27,290 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 13:22:27,293 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 13:22:27,296 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 13:22:27,297 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 13:22:27,298 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 13:22:27,298 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 13:22:27,301 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 13:22:27,304 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 13:22:27,306 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 13:22:27,308 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 13:22:27,309 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 13:22:27,311 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 13:22:27,320 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 13:22:27,322 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 13:22:27,323 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 13:22:27,324 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 13:22:27,325 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 13:22:27,337 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 13:22:27,338 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 13:22:27,338 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 13:22:27,344 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 13:22:27,345 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 13:22:27,348 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 13:22:27,348 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 13:22:27,349 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 13:22:27,353 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 13:22:27,354 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 13:22:27,356 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 13:22:27,357 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 13:22:27,357 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 13:22:27,358 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 13:22:27,358 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 13:22:27,359 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 13:22:27,360 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 13:22:27,361 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 13:22:27,406 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 13:22:27,407 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 13:22:27,409 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 13:22:27,409 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 13:22:27,409 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 13:22:27,410 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 13:22:27,410 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 13:22:27,410 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 13:22:27,411 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 13:22:27,411 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 13:22:27,412 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 13:22:27,412 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 13:22:27,412 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 13:22:27,413 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 13:22:27,413 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 13:22:27,413 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 13:22:27,413 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 13:22:27,414 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 13:22:27,414 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 13:22:27,414 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 13:22:27,414 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 13:22:27,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 13:22:27,415 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 13:22:27,415 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 13:22:27,415 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 13:22:27,415 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 13:22:27,415 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 13:22:27,415 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 13:22:27,416 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 13:22:27,416 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; [2020-09-25 13:22:27,868 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 13:22:27,891 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 13:22:27,896 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 13:22:27,898 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 13:22:27,898 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 13:22:27,899 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_2-1.c [2020-09-25 13:22:27,980 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f82a10b89/86f1679168f04b2d8415408d92498afe/FLAG025622d89 [2020-09-25 13:22:28,541 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 13:22:28,542 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/fibo_2calls_2-1.c [2020-09-25 13:22:28,552 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f82a10b89/86f1679168f04b2d8415408d92498afe/FLAG025622d89 [2020-09-25 13:22:28,863 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f82a10b89/86f1679168f04b2d8415408d92498afe [2020-09-25 13:22:28,878 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 13:22:28,884 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 13:22:28,886 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 13:22:28,886 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 13:22:28,891 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 13:22:28,892 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 01:22:28" (1/1) ... [2020-09-25 13:22:28,897 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1617b53b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:22:28, skipping insertion in model container [2020-09-25 13:22:28,897 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 01:22:28" (1/1) ... [2020-09-25 13:22:28,906 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 13:22:28,937 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 13:22:29,147 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 13:22:29,152 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 13:22:29,171 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 13:22:29,188 INFO L208 MainTranslator]: Completed translation [2020-09-25 13:22:29,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:22:29 WrapperNode [2020-09-25 13:22:29,189 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 13:22:29,189 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 13:22:29,190 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 13:22:29,190 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 13:22:29,205 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:22:29" (1/1) ... [2020-09-25 13:22:29,205 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:22:29" (1/1) ... [2020-09-25 13:22:29,301 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:22:29" (1/1) ... [2020-09-25 13:22:29,301 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:22:29" (1/1) ... [2020-09-25 13:22:29,306 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:22:29" (1/1) ... [2020-09-25 13:22:29,309 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:22:29" (1/1) ... [2020-09-25 13:22:29,311 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:22:29" (1/1) ... [2020-09-25 13:22:29,313 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 13:22:29,313 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 13:22:29,314 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 13:22:29,314 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 13:22:29,315 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:22:29" (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 [2020-09-25 13:22:29,398 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 13:22:29,399 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 13:22:29,399 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-09-25 13:22:29,400 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-09-25 13:22:29,400 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 13:22:29,401 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 13:22:29,401 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 13:22:29,402 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-09-25 13:22:29,402 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-09-25 13:22:29,403 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 13:22:29,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 13:22:29,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 13:22:29,688 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 13:22:29,688 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 13:22:29,696 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 01:22:29 BoogieIcfgContainer [2020-09-25 13:22:29,697 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 13:22:29,698 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 13:22:29,698 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 13:22:29,704 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 13:22:29,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 01:22:28" (1/3) ... [2020-09-25 13:22:29,706 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72366204 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 01:22:29, skipping insertion in model container [2020-09-25 13:22:29,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:22:29" (2/3) ... [2020-09-25 13:22:29,707 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72366204 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 01:22:29, skipping insertion in model container [2020-09-25 13:22:29,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 01:22:29" (3/3) ... [2020-09-25 13:22:29,710 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_2-1.c [2020-09-25 13:22:29,724 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 13:22:29,737 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 13:22:29,764 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 13:22:29,818 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 13:22:29,818 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 13:22:29,818 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 13:22:29,818 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 13:22:29,818 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 13:22:29,819 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 13:22:29,819 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 13:22:29,819 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 13:22:29,846 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2020-09-25 13:22:29,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-25 13:22:29,857 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:22:29,858 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 13:22:29,859 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:22:29,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:22:29,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1089710179, now seen corresponding path program 1 times [2020-09-25 13:22:29,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:22:29,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [311259720] [2020-09-25 13:22:29,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:22:29,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:22:30,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:22:30,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:22:30,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:22:30,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 13:22:30,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 13:22:30,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 270 [2020-09-25 13:22:30,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:22:30,278 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:22:30,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 13:22:30,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-25 13:22:30,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 13:22:30,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-09-25 13:22:30,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:22:30,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:22:30,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:22:30,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:22:30,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 13:22:30,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:22:30,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 13:22:30,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:22:30,353 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:22:30,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:22:30,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:22:30,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:22:30,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:22:30,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-25 13:22:30,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:22:30,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:22:30,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:22:30,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 13:22:30,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:22:30,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-25 13:22:30,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:22:30,381 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:22:30,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 13:22:30,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:22:30,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 13:22:30,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 13:22:30,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 13:22:30,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [311259720] [2020-09-25 13:22:30,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 13:22:30,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 13:22:30,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057056281] [2020-09-25 13:22:30,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 13:22:30,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:22:30,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 13:22:30,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 13:22:30,471 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 5 states. [2020-09-25 13:22:30,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:22:30,595 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2020-09-25 13:22:30,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 13:22:30,597 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-09-25 13:22:30,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:22:30,612 INFO L225 Difference]: With dead ends: 58 [2020-09-25 13:22:30,612 INFO L226 Difference]: Without dead ends: 42 [2020-09-25 13:22:30,617 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 13:22:30,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-25 13:22:30,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-09-25 13:22:30,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-25 13:22:30,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2020-09-25 13:22:30,682 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 16 [2020-09-25 13:22:30,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:22:30,683 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2020-09-25 13:22:30,683 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 13:22:30,683 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2020-09-25 13:22:30,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-25 13:22:30,686 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:22:30,686 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 13:22:30,686 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 13:22:30,687 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:22:30,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:22:30,687 INFO L82 PathProgramCache]: Analyzing trace with hash -653728005, now seen corresponding path program 1 times [2020-09-25 13:22:30,688 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:22:30,688 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [674833868] [2020-09-25 13:22:30,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:22:30,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:22:30,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:22:30,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:22:30,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-25 13:22:30,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:22:30,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-09-25 13:22:30,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:22:30,755 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:22:30,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 13:22:30,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 13:22:30,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 13:22:30,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:22:30,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:22:30,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:22:30,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:22:30,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:22:30,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 13:22:30,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:22:30,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 13:22:30,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:22:30,777 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:22:30,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:22:30,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:22:30,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:22:30,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:22:30,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-25 13:22:30,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:22:30,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:22:30,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:22:30,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 13:22:30,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:22:30,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-09-25 13:22:30,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:22:30,823 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:22:30,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 13:22:30,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 13:22:30,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 13:22:30,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:22:30,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 13:22:30,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [674833868] [2020-09-25 13:22:30,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 13:22:30,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 13:22:30,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435942586] [2020-09-25 13:22:30,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 13:22:30,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:22:30,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 13:22:30,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 13:22:30,853 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 5 states. [2020-09-25 13:22:30,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:22:30,933 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2020-09-25 13:22:30,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 13:22:30,934 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-09-25 13:22:30,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:22:30,936 INFO L225 Difference]: With dead ends: 50 [2020-09-25 13:22:30,936 INFO L226 Difference]: Without dead ends: 44 [2020-09-25 13:22:30,937 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 13:22:30,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-25 13:22:30,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-09-25 13:22:30,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-25 13:22:30,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2020-09-25 13:22:30,948 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 17 [2020-09-25 13:22:30,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:22:30,949 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2020-09-25 13:22:30,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 13:22:30,949 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2020-09-25 13:22:30,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-25 13:22:30,951 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:22:30,952 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 13:22:30,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 13:22:30,952 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:22:30,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:22:30,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1617834856, now seen corresponding path program 1 times [2020-09-25 13:22:30,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:22:30,953 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1542380319] [2020-09-25 13:22:30,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:22:30,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:22:30,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:22:31,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:22:31,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:22:31,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:22:31,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-25 13:22:31,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 13:22:31,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 873 [2020-09-25 13:22:31,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:22:31,842 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:22:31,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 13:22:31,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-25 13:22:31,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-25 13:22:31,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:22:31,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:22:31,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:22:31,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:22:31,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:22:31,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 13:22:31,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:22:31,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 13:22:31,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:22:31,872 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:22:31,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:22:31,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:22:31,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:22:31,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:22:31,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-25 13:22:31,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:22:31,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:22:31,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:22:32,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:22:32,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-09-25 13:22:32,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 13:22:32,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 396 [2020-09-25 13:22:32,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:22:32,288 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:22:32,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 13:22:32,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:22:32,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-09-25 13:22:32,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:22:32,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-25 13:22:32,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:22:32,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:22:32,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:22:32,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 13:22:32,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:22:32,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 13:22:32,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:22:32,389 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:22:32,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 13:22:32,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:22:32,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 13:22:32,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:22:32,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-25 13:22:32,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:22:32,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:22:32,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:22:32,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 13:22:32,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:22:32,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-09-25 13:22:32,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:22:32,455 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:22:32,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 13:22:32,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:22:32,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 13:22:32,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 13:22:32,485 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-25 13:22:32,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1542380319] [2020-09-25 13:22:32,485 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 13:22:32,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-25 13:22:32,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934830881] [2020-09-25 13:22:32,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 13:22:32,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:22:32,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 13:22:32,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-25 13:22:32,488 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 8 states. [2020-09-25 13:22:32,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:22:32,630 INFO L93 Difference]: Finished difference Result 64 states and 76 transitions. [2020-09-25 13:22:32,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 13:22:32,631 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-09-25 13:22:32,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:22:32,634 INFO L225 Difference]: With dead ends: 64 [2020-09-25 13:22:32,634 INFO L226 Difference]: Without dead ends: 58 [2020-09-25 13:22:32,635 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-09-25 13:22:32,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-25 13:22:32,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 50. [2020-09-25 13:22:32,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-25 13:22:32,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2020-09-25 13:22:32,647 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 33 [2020-09-25 13:22:32,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:22:32,647 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2020-09-25 13:22:32,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 13:22:32,648 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2020-09-25 13:22:32,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-25 13:22:32,650 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:22:32,650 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 13:22:32,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 13:22:32,651 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:22:32,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:22:32,651 INFO L82 PathProgramCache]: Analyzing trace with hash -159162515, now seen corresponding path program 1 times [2020-09-25 13:22:32,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:22:32,652 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1421264724] [2020-09-25 13:22:32,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:22:32,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:22:32,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:22:32,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:22:32,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:22:32,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:22:33,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:22:33,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:22:34,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:22:34,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-25 13:22:34,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 13:22:34,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1668 [2020-09-25 13:22:34,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:22:34,332 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:22:34,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 13:22:34,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 13:22:34,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-25 13:22:34,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:22:34,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:22:34,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:22:34,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:22:34,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:22:34,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 13:22:34,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:22:34,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 13:22:34,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:22:34,349 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:22:34,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:22:34,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:22:34,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:22:34,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:22:34,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-25 13:22:34,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:22:34,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:22:34,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:22:34,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:22:34,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:22:34,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:22:34,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:22:34,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-25 13:22:34,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 13:22:34,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 360 [2020-09-25 13:22:34,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:22:34,719 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:22:34,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 13:22:34,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 13:22:34,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-09-25 13:22:34,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:22:34,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-25 13:22:34,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:22:34,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:22:34,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:22:34,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 13:22:34,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:22:34,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 13:22:34,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:22:34,750 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:22:34,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 13:22:34,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:22:34,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 13:22:34,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:22:34,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-25 13:22:34,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:22:34,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:22:34,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:22:34,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:22:34,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 13:22:34,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 13:22:34,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-09-25 13:22:34,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:22:34,792 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:22:34,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 13:22:34,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:22:34,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 13:22:34,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:22:34,824 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 13:22:34,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1421264724] [2020-09-25 13:22:34,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 13:22:34,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-25 13:22:34,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006172864] [2020-09-25 13:22:34,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 13:22:34,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:22:34,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 13:22:34,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-25 13:22:34,827 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand 7 states. [2020-09-25 13:22:34,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:22:34,955 INFO L93 Difference]: Finished difference Result 62 states and 73 transitions. [2020-09-25 13:22:34,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 13:22:34,956 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2020-09-25 13:22:34,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:22:34,958 INFO L225 Difference]: With dead ends: 62 [2020-09-25 13:22:34,958 INFO L226 Difference]: Without dead ends: 56 [2020-09-25 13:22:34,959 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-25 13:22:34,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-09-25 13:22:34,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2020-09-25 13:22:34,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-25 13:22:34,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2020-09-25 13:22:34,970 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 34 [2020-09-25 13:22:34,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:22:34,970 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2020-09-25 13:22:34,970 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 13:22:34,970 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2020-09-25 13:22:34,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-25 13:22:34,972 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:22:34,972 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 13:22:34,973 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 13:22:34,973 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:22:34,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:22:34,973 INFO L82 PathProgramCache]: Analyzing trace with hash 887160861, now seen corresponding path program 2 times [2020-09-25 13:22:34,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:22:34,974 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1362646240] [2020-09-25 13:22:34,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:22:34,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 13:22:34,984 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 13:22:34,984 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 13:22:34,989 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 13:22:35,011 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 01:22:35 BoogieIcfgContainer [2020-09-25 13:22:35,012 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 13:22:35,015 INFO L168 Benchmark]: Toolchain (without parser) took 6133.86 ms. Allocated memory was 147.8 MB in the beginning and 243.3 MB in the end (delta: 95.4 MB). Free memory was 104.1 MB in the beginning and 133.7 MB in the end (delta: -29.6 MB). Peak memory consumption was 65.8 MB. Max. memory is 7.1 GB. [2020-09-25 13:22:35,016 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 147.8 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-25 13:22:35,017 INFO L168 Benchmark]: CACSL2BoogieTranslator took 303.43 ms. Allocated memory is still 147.8 MB. Free memory was 103.4 MB in the beginning and 93.9 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-09-25 13:22:35,018 INFO L168 Benchmark]: Boogie Preprocessor took 123.52 ms. Allocated memory was 147.8 MB in the beginning and 205.0 MB in the end (delta: 57.1 MB). Free memory was 93.9 MB in the beginning and 183.6 MB in the end (delta: -89.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-09-25 13:22:35,019 INFO L168 Benchmark]: RCFGBuilder took 383.59 ms. Allocated memory is still 205.0 MB. Free memory was 183.6 MB in the beginning and 169.7 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2020-09-25 13:22:35,020 INFO L168 Benchmark]: TraceAbstraction took 5313.43 ms. Allocated memory was 205.0 MB in the beginning and 243.3 MB in the end (delta: 38.3 MB). Free memory was 169.1 MB in the beginning and 133.7 MB in the end (delta: 35.4 MB). Peak memory consumption was 73.7 MB. Max. memory is 7.1 GB. [2020-09-25 13:22:35,024 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 147.8 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 303.43 ms. Allocated memory is still 147.8 MB. Free memory was 103.4 MB in the beginning and 93.9 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 123.52 ms. Allocated memory was 147.8 MB in the beginning and 205.0 MB in the end (delta: 57.1 MB). Free memory was 93.9 MB in the beginning and 183.6 MB in the end (delta: -89.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 383.59 ms. Allocated memory is still 205.0 MB. Free memory was 183.6 MB in the beginning and 169.7 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5313.43 ms. Allocated memory was 205.0 MB in the beginning and 243.3 MB in the end (delta: 38.3 MB). Free memory was 169.1 MB in the beginning and 133.7 MB in the end (delta: 35.4 MB). Peak memory consumption was 73.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 39]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L36] int x = 2; [L37] CALL, EXPR fibo1(x) [L8] COND FALSE !(n < 1) [L10] COND FALSE !(n == 1) [L13] CALL, EXPR fibo2(n-1) [L18] COND FALSE !(n < 1) [L20] COND TRUE n == 1 [L21] return 1; [L13] RET, EXPR fibo2(n-1) [L13] CALL, EXPR fibo2(n-2) [L18] COND TRUE n < 1 [L19] return 0; [L13] RET, EXPR fibo2(n-2) [L13] return fibo2(n-1) + fibo2(n-2); [L37] RET, EXPR fibo1(x) [L37] int result = fibo1(x); [L38] COND TRUE result == 1 [L39] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 45 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.1s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 169 SDtfs, 58 SDslu, 610 SDs, 0 SdLazy, 191 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred 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, 4 MinimizatonAttempts, 16 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 4.2s InterpolantComputationTime, 134 NumberOfCodeBlocks, 134 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 96 ConstructedInterpolants, 0 QuantifiedInterpolants, 6900 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 9/9 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...