/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=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id2_b3_o2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 02:03:13,326 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 02:03:13,329 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 02:03:13,360 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 02:03:13,360 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 02:03:13,361 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 02:03:13,363 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 02:03:13,364 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 02:03:13,366 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 02:03:13,367 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 02:03:13,368 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 02:03:13,369 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 02:03:13,369 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 02:03:13,370 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 02:03:13,372 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 02:03:13,373 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 02:03:13,374 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 02:03:13,374 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 02:03:13,376 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 02:03:13,378 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 02:03:13,379 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 02:03:13,380 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 02:03:13,381 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 02:03:13,382 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 02:03:13,385 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 02:03:13,385 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 02:03:13,385 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 02:03:13,386 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 02:03:13,387 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 02:03:13,388 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 02:03:13,388 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 02:03:13,389 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 02:03:13,390 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 02:03:13,391 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 02:03:13,393 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 02:03:13,394 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 02:03:13,394 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 02:03:13,394 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 02:03:13,395 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 02:03:13,396 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 02:03:13,396 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 02:03:13,398 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 02:03:13,446 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 02:03:13,447 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 02:03:13,452 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 02:03:13,452 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 02:03:13,452 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 02:03:13,453 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 02:03:13,453 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 02:03:13,453 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 02:03:13,453 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 02:03:13,453 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 02:03:13,454 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 02:03:13,454 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 02:03:13,454 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 02:03:13,454 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 02:03:13,454 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 02:03:13,455 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 02:03:13,457 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 02:03:13,457 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 02:03:13,457 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 02:03:13,457 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 02:03:13,459 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 02:03:13,459 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 02:03:13,460 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 02:03:13,460 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 02:03:13,460 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 02:03:13,460 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 02:03:13,460 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 02:03:13,460 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 02:03:13,461 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 02:03:13,462 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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;log-additional-information=true; [2020-09-25 02:03:13,929 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 02:03:13,948 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 02:03:13,952 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 02:03:13,956 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 02:03:13,958 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 02:03:13,960 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id2_b3_o2.c [2020-09-25 02:03:14,050 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1368c01f5/b8ef38fb19cc4860a7eeab45f58589ad/FLAGa4f05f1fb [2020-09-25 02:03:14,578 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 02:03:14,579 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id2_b3_o2.c [2020-09-25 02:03:14,588 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1368c01f5/b8ef38fb19cc4860a7eeab45f58589ad/FLAGa4f05f1fb [2020-09-25 02:03:14,925 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1368c01f5/b8ef38fb19cc4860a7eeab45f58589ad [2020-09-25 02:03:14,937 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 02:03:14,942 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 02:03:14,943 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 02:03:14,943 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 02:03:14,947 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 02:03:14,949 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:03:14" (1/1) ... [2020-09-25 02:03:14,953 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57c5cb56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:03:14, skipping insertion in model container [2020-09-25 02:03:14,953 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:03:14" (1/1) ... [2020-09-25 02:03:14,962 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 02:03:14,987 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 02:03:15,189 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 02:03:15,195 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 02:03:15,219 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 02:03:15,237 INFO L208 MainTranslator]: Completed translation [2020-09-25 02:03:15,238 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:03:15 WrapperNode [2020-09-25 02:03:15,238 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 02:03:15,239 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 02:03:15,239 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 02:03:15,239 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 02:03:15,255 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:03:15" (1/1) ... [2020-09-25 02:03:15,256 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:03:15" (1/1) ... [2020-09-25 02:03:15,261 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:03:15" (1/1) ... [2020-09-25 02:03:15,262 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:03:15" (1/1) ... [2020-09-25 02:03:15,343 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:03:15" (1/1) ... [2020-09-25 02:03:15,349 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:03:15" (1/1) ... [2020-09-25 02:03:15,350 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:03:15" (1/1) ... [2020-09-25 02:03:15,352 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 02:03:15,352 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 02:03:15,352 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 02:03:15,352 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 02:03:15,353 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:03:15" (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 02:03:15,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 02:03:15,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 02:03:15,430 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-09-25 02:03:15,430 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2020-09-25 02:03:15,430 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 02:03:15,430 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-25 02:03:15,430 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 02:03:15,431 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-09-25 02:03:15,431 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2020-09-25 02:03:15,431 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 02:03:15,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 02:03:15,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 02:03:15,675 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 02:03:15,676 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 02:03:15,682 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:03:15 BoogieIcfgContainer [2020-09-25 02:03:15,683 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 02:03:15,698 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 02:03:15,698 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 02:03:15,703 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 02:03:15,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 02:03:14" (1/3) ... [2020-09-25 02:03:15,713 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10cf7fbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:03:15, skipping insertion in model container [2020-09-25 02:03:15,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:03:15" (2/3) ... [2020-09-25 02:03:15,714 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10cf7fbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:03:15, skipping insertion in model container [2020-09-25 02:03:15,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:03:15" (3/3) ... [2020-09-25 02:03:15,720 INFO L109 eAbstractionObserver]: Analyzing ICFG id2_b3_o2.c [2020-09-25 02:03:15,749 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 02:03:15,765 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 02:03:15,787 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 02:03:15,817 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 02:03:15,818 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 02:03:15,818 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 02:03:15,818 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 02:03:15,818 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 02:03:15,818 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 02:03:15,819 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 02:03:15,819 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 02:03:15,843 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-09-25 02:03:15,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-25 02:03:15,852 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:03:15,853 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:03:15,854 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:03:15,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:03:15,862 INFO L82 PathProgramCache]: Analyzing trace with hash 875745540, now seen corresponding path program 1 times [2020-09-25 02:03:15,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:03:15,873 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [553698036] [2020-09-25 02:03:15,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:03:15,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:03:16,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:03:16,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:03:16,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 02:03:16,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:03:16,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 74 [2020-09-25 02:03:16,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:03:16,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 02:03:16,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-25 02:03:16,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 02:03:16,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 02:03:16,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:03:16,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:03:16,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:03:16,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:03:16,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 02:03:16,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:03:16,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 02:03:16,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:03:16,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:03:16,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:03:16,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:03:16,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:03:16,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-25 02:03:16,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:03:16,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:03:16,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:03:16,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 02:03:16,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:03:16,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-09-25 02:03:16,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:03:16,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 02:03:16,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:03:16,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 02:03:16,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:03:16,240 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 02:03:16,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [553698036] [2020-09-25 02:03:16,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 02:03:16,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 02:03:16,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315296282] [2020-09-25 02:03:16,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 02:03:16,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:03:16,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 02:03:16,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 02:03:16,271 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 5 states. [2020-09-25 02:03:16,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:03:16,362 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2020-09-25 02:03:16,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 02:03:16,364 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-09-25 02:03:16,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:03:16,378 INFO L225 Difference]: With dead ends: 51 [2020-09-25 02:03:16,378 INFO L226 Difference]: Without dead ends: 36 [2020-09-25 02:03:16,383 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 02:03:16,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-09-25 02:03:16,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-09-25 02:03:16,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-25 02:03:16,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-09-25 02:03:16,440 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 16 [2020-09-25 02:03:16,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:03:16,440 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-09-25 02:03:16,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 02:03:16,441 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-09-25 02:03:16,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-25 02:03:16,443 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:03:16,444 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:03:16,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 02:03:16,444 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:03:16,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:03:16,445 INFO L82 PathProgramCache]: Analyzing trace with hash 71846672, now seen corresponding path program 1 times [2020-09-25 02:03:16,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:03:16,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1857742144] [2020-09-25 02:03:16,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:03:16,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:03:16,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:03:16,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:03:16,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-25 02:03:16,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:03:16,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 289 [2020-09-25 02:03:16,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:03:16,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 02:03:16,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-25 02:03:16,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-25 02:03:16,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:03:16,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:03:16,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:03:16,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:03:16,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:03:16,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 02:03:16,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:03:16,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 02:03:16,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:03:16,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:03:16,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:03:16,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:03:16,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:03:16,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-25 02:03:16,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:03:16,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:03:16,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:03:16,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-25 02:03:16,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:03:16,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 87 [2020-09-25 02:03:16,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:03:16,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 02:03:16,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:03:16,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-25 02:03:16,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:03:17,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-25 02:03:17,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:03:17,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:03:17,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:03:17,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 02:03:17,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:03:17,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-09-25 02:03:17,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:03:17,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 02:03:17,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:03:17,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 02:03:17,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:03:17,063 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 02:03:17,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1857742144] [2020-09-25 02:03:17,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 02:03:17,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-25 02:03:17,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141857245] [2020-09-25 02:03:17,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 02:03:17,068 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:03:17,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 02:03:17,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-09-25 02:03:17,069 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 8 states. [2020-09-25 02:03:17,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:03:17,205 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2020-09-25 02:03:17,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 02:03:17,205 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-09-25 02:03:17,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:03:17,207 INFO L225 Difference]: With dead ends: 66 [2020-09-25 02:03:17,207 INFO L226 Difference]: Without dead ends: 44 [2020-09-25 02:03:17,209 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-09-25 02:03:17,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-25 02:03:17,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-09-25 02:03:17,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-25 02:03:17,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-09-25 02:03:17,218 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 25 [2020-09-25 02:03:17,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:03:17,218 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-09-25 02:03:17,219 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 02:03:17,219 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-09-25 02:03:17,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-25 02:03:17,220 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:03:17,221 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 02:03:17,221 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 02:03:17,221 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:03:17,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:03:17,222 INFO L82 PathProgramCache]: Analyzing trace with hash -511991682, now seen corresponding path program 1 times [2020-09-25 02:03:17,222 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:03:17,222 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [634722676] [2020-09-25 02:03:17,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:03:17,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:03:17,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:03:17,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:03:17,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:03:18,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:03:18,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-25 02:03:18,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 02:03:18,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 877 [2020-09-25 02:03:18,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:03:18,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 02:03:18,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-09-25 02:03:18,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 02:03:18,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:03:18,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:03:18,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:03:18,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:03:18,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:03:18,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 02:03:18,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:03:18,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 02:03:18,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:03:18,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:03:18,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:03:18,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:03:18,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:03:18,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-25 02:03:18,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:03:18,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:03:18,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:03:18,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:03:18,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-25 02:03:18,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 02:03:18,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 261 [2020-09-25 02:03:18,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:03:18,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 02:03:18,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 02:03:18,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 02:03:18,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:03:18,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-25 02:03:18,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:03:18,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:03:18,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:03:18,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:03:18,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-25 02:03:18,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 02:03:18,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 166 [2020-09-25 02:03:18,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:03:18,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 02:03:18,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-25 02:03:18,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 02:03:18,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:03:18,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-25 02:03:18,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:03:18,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:03:18,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:03:18,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 02:03:18,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:03:18,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-25 02:03:18,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:03:18,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 02:03:18,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:03:18,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 02:03:18,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:03:18,732 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-25 02:03:18,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [634722676] [2020-09-25 02:03:18,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 02:03:18,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-25 02:03:18,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506182850] [2020-09-25 02:03:18,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 02:03:18,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:03:18,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 02:03:18,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-25 02:03:18,736 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 7 states. [2020-09-25 02:03:18,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:03:18,795 INFO L93 Difference]: Finished difference Result 69 states and 76 transitions. [2020-09-25 02:03:18,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 02:03:18,795 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2020-09-25 02:03:18,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:03:18,797 INFO L225 Difference]: With dead ends: 69 [2020-09-25 02:03:18,797 INFO L226 Difference]: Without dead ends: 50 [2020-09-25 02:03:18,798 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-09-25 02:03:18,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-25 02:03:18,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-09-25 02:03:18,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-25 02:03:18,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-09-25 02:03:18,806 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 34 [2020-09-25 02:03:18,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:03:18,807 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-09-25 02:03:18,807 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 02:03:18,807 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-09-25 02:03:18,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-25 02:03:18,809 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:03:18,809 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 02:03:18,809 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 02:03:18,809 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:03:18,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:03:18,810 INFO L82 PathProgramCache]: Analyzing trace with hash -2109914946, now seen corresponding path program 1 times [2020-09-25 02:03:18,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:03:18,810 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [819534481] [2020-09-25 02:03:18,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:03:18,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 02:03:18,821 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 02:03:18,821 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 02:03:18,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 02:03:18,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 02:03:18 BoogieIcfgContainer [2020-09-25 02:03:18,848 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 02:03:18,852 INFO L168 Benchmark]: Toolchain (without parser) took 3911.11 ms. Allocated memory was 141.0 MB in the beginning and 242.7 MB in the end (delta: 101.7 MB). Free memory was 104.6 MB in the beginning and 191.7 MB in the end (delta: -87.2 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. [2020-09-25 02:03:18,852 INFO L168 Benchmark]: CDTParser took 1.65 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-25 02:03:18,853 INFO L168 Benchmark]: CACSL2BoogieTranslator took 295.19 ms. Allocated memory is still 141.0 MB. Free memory was 103.9 MB in the beginning and 94.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-09-25 02:03:18,854 INFO L168 Benchmark]: Boogie Preprocessor took 113.17 ms. Allocated memory was 141.0 MB in the beginning and 203.4 MB in the end (delta: 62.4 MB). Free memory was 94.4 MB in the beginning and 182.6 MB in the end (delta: -88.2 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-09-25 02:03:18,855 INFO L168 Benchmark]: RCFGBuilder took 330.91 ms. Allocated memory is still 203.4 MB. Free memory was 182.2 MB in the beginning and 168.9 MB in the end (delta: 13.3 MB). Peak memory consumption was 13.3 MB. Max. memory is 7.1 GB. [2020-09-25 02:03:18,856 INFO L168 Benchmark]: TraceAbstraction took 3149.98 ms. Allocated memory was 203.4 MB in the beginning and 242.7 MB in the end (delta: 39.3 MB). Free memory was 168.3 MB in the beginning and 191.7 MB in the end (delta: -23.5 MB). Peak memory consumption was 15.8 MB. Max. memory is 7.1 GB. [2020-09-25 02:03:18,860 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.65 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 295.19 ms. Allocated memory is still 141.0 MB. Free memory was 103.9 MB in the beginning and 94.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 113.17 ms. Allocated memory was 141.0 MB in the beginning and 203.4 MB in the end (delta: 62.4 MB). Free memory was 94.4 MB in the beginning and 182.6 MB in the end (delta: -88.2 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 330.91 ms. Allocated memory is still 203.4 MB. Free memory was 182.2 MB in the beginning and 168.9 MB in the end (delta: 13.3 MB). Peak memory consumption was 13.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3149.98 ms. Allocated memory was 203.4 MB in the beginning and 242.7 MB in the end (delta: 39.3 MB). Free memory was 168.3 MB in the beginning and 191.7 MB in the end (delta: -23.5 MB). Peak memory consumption was 15.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 25]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L22] unsigned int input = __VERIFIER_nondet_uint(); [L23] CALL, EXPR id(input) [L8] COND FALSE !(x==0) [L9] CALL, EXPR id2(x-1) [L15] COND FALSE !(x==0) [L16] CALL, EXPR id(x-1) [L8] COND TRUE x==0 [L8] return 0; [L16] RET, EXPR id(x-1) [L16] unsigned int ret = id(x-1) + 1; [L17] COND FALSE !(ret > 3) [L18] return ret; [L9] RET, EXPR id2(x-1) [L9] unsigned int ret = id2(x-1) + 1; [L10] COND FALSE !(ret > 3) [L11] return ret; [L23] RET, EXPR id(input) [L23] unsigned int result = id(input); [L24] COND TRUE result == 2 [L25] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.0s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 113 SDtfs, 11 SDslu, 493 SDs, 0 SdLazy, 76 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=47occurred 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, 5 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 2.3s InterpolantComputationTime, 109 NumberOfCodeBlocks, 109 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 72 ConstructedInterpolants, 0 QuantifiedInterpolants, 5520 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 4/4 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...