/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=SHALLOWEST --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/id_i5_o5-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 23:48:18,452 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 23:48:18,456 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 23:48:18,483 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 23:48:18,483 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 23:48:18,485 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 23:48:18,486 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 23:48:18,488 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 23:48:18,490 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 23:48:18,492 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 23:48:18,493 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 23:48:18,494 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 23:48:18,494 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 23:48:18,496 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 23:48:18,497 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 23:48:18,499 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 23:48:18,500 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 23:48:18,501 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 23:48:18,503 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 23:48:18,505 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 23:48:18,507 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 23:48:18,508 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 23:48:18,510 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 23:48:18,511 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 23:48:18,514 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 23:48:18,514 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 23:48:18,514 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 23:48:18,515 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 23:48:18,516 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 23:48:18,517 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 23:48:18,517 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 23:48:18,518 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 23:48:18,519 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 23:48:18,521 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 23:48:18,522 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 23:48:18,522 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 23:48:18,523 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 23:48:18,523 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 23:48:18,524 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 23:48:18,525 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 23:48:18,526 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 23:48:18,527 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 [2020-09-24 23:48:18,561 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 23:48:18,561 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 23:48:18,563 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 23:48:18,563 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 23:48:18,563 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 23:48:18,563 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 23:48:18,564 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 23:48:18,564 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 23:48:18,564 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 23:48:18,564 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 23:48:18,564 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 23:48:18,565 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 23:48:18,565 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 23:48:18,565 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 23:48:18,565 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 23:48:18,565 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 23:48:18,566 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 23:48:18,566 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 23:48:18,566 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 23:48:18,566 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 23:48:18,566 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 23:48:18,567 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 23:48:18,567 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 23:48:18,567 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 23:48:18,567 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 23:48:18,568 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 23:48:18,568 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 23:48:18,568 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 23:48:18,568 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 23:48:18,568 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=SHALLOWEST;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=SHALLOWEST;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=SHALLOWEST;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=SHALLOWEST;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=SHALLOWEST;log-additional-information=true; [2020-09-24 23:48:19,090 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 23:48:19,115 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 23:48:19,120 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 23:48:19,123 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 23:48:19,124 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 23:48:19,125 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i5_o5-1.c [2020-09-24 23:48:19,227 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/897be4334/d1093f6826794d3d8b639c9ece9244aa/FLAG7df5a4b14 [2020-09-24 23:48:19,786 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 23:48:19,787 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id_i5_o5-1.c [2020-09-24 23:48:19,796 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/897be4334/d1093f6826794d3d8b639c9ece9244aa/FLAG7df5a4b14 [2020-09-24 23:48:20,129 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/897be4334/d1093f6826794d3d8b639c9ece9244aa [2020-09-24 23:48:20,145 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 23:48:20,151 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 23:48:20,156 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 23:48:20,156 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 23:48:20,160 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 23:48:20,162 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 11:48:20" (1/1) ... [2020-09-24 23:48:20,167 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c364e78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:48:20, skipping insertion in model container [2020-09-24 23:48:20,168 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 11:48:20" (1/1) ... [2020-09-24 23:48:20,179 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 23:48:20,210 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 23:48:20,417 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 23:48:20,423 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 23:48:20,443 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 23:48:20,461 INFO L208 MainTranslator]: Completed translation [2020-09-24 23:48:20,462 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:48:20 WrapperNode [2020-09-24 23:48:20,462 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 23:48:20,463 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 23:48:20,463 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 23:48:20,463 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 23:48:20,481 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:48:20" (1/1) ... [2020-09-24 23:48:20,482 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:48:20" (1/1) ... [2020-09-24 23:48:20,488 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:48:20" (1/1) ... [2020-09-24 23:48:20,489 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:48:20" (1/1) ... [2020-09-24 23:48:20,493 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:48:20" (1/1) ... [2020-09-24 23:48:20,496 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:48:20" (1/1) ... [2020-09-24 23:48:20,497 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:48:20" (1/1) ... [2020-09-24 23:48:20,498 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 23:48:20,499 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 23:48:20,499 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 23:48:20,499 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 23:48:20,500 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:48:20" (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 [2020-09-24 23:48:20,668 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 23:48:20,669 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 23:48:20,669 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-09-24 23:48:20,669 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 23:48:20,669 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 23:48:20,669 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 23:48:20,669 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-09-24 23:48:20,670 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 23:48:20,670 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 23:48:20,670 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 23:48:20,861 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 23:48:20,861 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 23:48:20,866 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 11:48:20 BoogieIcfgContainer [2020-09-24 23:48:20,866 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 23:48:20,868 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 23:48:20,868 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 23:48:20,872 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 23:48:20,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 11:48:20" (1/3) ... [2020-09-24 23:48:20,874 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44fafe12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 11:48:20, skipping insertion in model container [2020-09-24 23:48:20,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:48:20" (2/3) ... [2020-09-24 23:48:20,874 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44fafe12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 11:48:20, skipping insertion in model container [2020-09-24 23:48:20,875 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 11:48:20" (3/3) ... [2020-09-24 23:48:20,878 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i5_o5-1.c [2020-09-24 23:48:20,890 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 23:48:20,900 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 23:48:20,924 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 23:48:20,957 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 23:48:20,957 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 23:48:20,957 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 23:48:20,957 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 23:48:20,958 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 23:48:20,958 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 23:48:20,958 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 23:48:20,958 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 23:48:20,982 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-09-24 23:48:20,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-24 23:48:20,991 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 23:48:20,993 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 23:48:20,993 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 23:48:21,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 23:48:21,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1037734449, now seen corresponding path program 1 times [2020-09-24 23:48:21,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 23:48:21,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1470735280] [2020-09-24 23:48:21,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 23:48:21,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:48:21,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:48:21,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:48:21,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:48:21,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 23:48:21,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 23:48:21,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 217 [2020-09-24 23:48:21,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:48:21,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 23:48:21,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 23:48:21,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 23:48:21,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 23:48:21,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 23:48:21,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:48:21,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:48:21,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:48:21,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 23:48:21,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:48:21,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 23:48:21,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:48:21,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:48:21,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:48:21,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:48:21,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:48:21,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 23:48:21,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:48:21,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:48:21,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:48:21,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 23:48:21,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:48:21,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-24 23:48:21,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:48:21,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 23:48:21,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 23:48:21,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 23:48:21,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:48:21,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 23:48:21,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1470735280] [2020-09-24 23:48:21,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 23:48:21,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 23:48:21,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20832231] [2020-09-24 23:48:21,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 23:48:21,481 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 23:48:21,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 23:48:21,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 23:48:21,505 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 5 states. [2020-09-24 23:48:21,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 23:48:21,665 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2020-09-24 23:48:21,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 23:48:21,674 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-09-24 23:48:21,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 23:48:21,691 INFO L225 Difference]: With dead ends: 37 [2020-09-24 23:48:21,691 INFO L226 Difference]: Without dead ends: 23 [2020-09-24 23:48:21,695 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 [2020-09-24 23:48:21,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-09-24 23:48:21,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-09-24 23:48:21,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-09-24 23:48:21,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-09-24 23:48:21,751 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 16 [2020-09-24 23:48:21,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 23:48:21,751 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-09-24 23:48:21,751 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 23:48:21,752 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-09-24 23:48:21,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-24 23:48:21,755 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 23:48:21,755 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 23:48:21,755 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 23:48:21,756 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 23:48:21,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 23:48:21,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1478812441, now seen corresponding path program 1 times [2020-09-24 23:48:21,757 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 23:48:21,757 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [173918924] [2020-09-24 23:48:21,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 23:48:21,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:48:21,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:48:21,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:48:22,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:48:22,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-24 23:48:22,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 23:48:22,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 506 [2020-09-24 23:48:22,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:48:22,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 23:48:22,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 23:48:22,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-24 23:48:22,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:48:22,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 23:48:22,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:48:22,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:48:22,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:48:22,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 23:48:22,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:48:22,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 23:48:22,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:48:22,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:48:22,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:48:22,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:48:22,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:48:22,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 23:48:22,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:48:22,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:48:22,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:48:22,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-24 23:48:22,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:48:22,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-09-24 23:48:22,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:48:22,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 23:48:22,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 23:48:22,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-24 23:48:22,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:48:22,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-24 23:48:22,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:48:22,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:48:22,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:48:22,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 23:48:22,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:48:22,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-24 23:48:22,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:48:22,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 23:48:22,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:48:22,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 23:48:22,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:48:22,458 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 23:48:22,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [173918924] [2020-09-24 23:48:22,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 23:48:22,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 23:48:22,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577947001] [2020-09-24 23:48:22,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 23:48:22,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 23:48:22,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 23:48:22,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-24 23:48:22,463 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 7 states. [2020-09-24 23:48:22,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 23:48:22,536 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-09-24 23:48:22,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 23:48:22,537 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-09-24 23:48:22,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 23:48:22,539 INFO L225 Difference]: With dead ends: 34 [2020-09-24 23:48:22,539 INFO L226 Difference]: Without dead ends: 28 [2020-09-24 23:48:22,553 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-09-24 23:48:22,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-09-24 23:48:22,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-09-24 23:48:22,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-24 23:48:22,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-09-24 23:48:22,561 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 24 [2020-09-24 23:48:22,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 23:48:22,561 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-09-24 23:48:22,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 23:48:22,562 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-09-24 23:48:22,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-24 23:48:22,563 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 23:48:22,563 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 23:48:22,564 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 23:48:22,564 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 23:48:22,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 23:48:22,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1463730447, now seen corresponding path program 2 times [2020-09-24 23:48:22,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 23:48:22,565 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1522494830] [2020-09-24 23:48:22,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 23:48:22,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:48:22,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:48:22,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:48:23,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:48:23,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-09-24 23:48:23,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 23:48:23,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 500 [2020-09-24 23:48:23,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:48:23,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 23:48:23,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 23:48:23,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 23:48:23,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:48:23,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 23:48:23,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:48:23,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:48:23,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:48:23,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 23:48:23,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:48:23,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 23:48:23,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:48:23,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:48:23,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:48:23,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:48:23,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:48:23,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 23:48:23,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:48:23,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:48:23,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:48:23,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-24 23:48:23,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:48:23,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 83 [2020-09-24 23:48:23,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:48:23,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 23:48:23,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 23:48:23,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-09-24 23:48:23,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:48:23,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-24 23:48:23,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:48:23,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:48:23,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:48:23,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-24 23:48:23,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:48:23,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-09-24 23:48:23,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:48:23,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 23:48:23,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:48:23,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 23:48:23,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:48:23,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-24 23:48:23,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:48:23,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:48:23,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:48:23,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 23:48:23,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:48:23,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-24 23:48:23,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:48:23,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 23:48:23,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:48:23,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 23:48:23,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:48:23,342 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-24 23:48:23,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1522494830] [2020-09-24 23:48:23,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 23:48:23,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 23:48:23,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34639919] [2020-09-24 23:48:23,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 23:48:23,344 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 23:48:23,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 23:48:23,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 23:48:23,345 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 8 states. [2020-09-24 23:48:23,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 23:48:23,416 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2020-09-24 23:48:23,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 23:48:23,417 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-09-24 23:48:23,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 23:48:23,418 INFO L225 Difference]: With dead ends: 39 [2020-09-24 23:48:23,419 INFO L226 Difference]: Without dead ends: 33 [2020-09-24 23:48:23,419 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-24 23:48:23,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-09-24 23:48:23,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-09-24 23:48:23,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-09-24 23:48:23,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-09-24 23:48:23,427 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 32 [2020-09-24 23:48:23,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 23:48:23,428 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-09-24 23:48:23,428 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 23:48:23,428 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-09-24 23:48:23,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-24 23:48:23,429 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 23:48:23,430 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 23:48:23,430 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 23:48:23,430 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 23:48:23,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 23:48:23,431 INFO L82 PathProgramCache]: Analyzing trace with hash 23346727, now seen corresponding path program 3 times [2020-09-24 23:48:23,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 23:48:23,431 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [750328634] [2020-09-24 23:48:23,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 23:48:23,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:48:23,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:48:23,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:48:24,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:48:24,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-09-24 23:48:24,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 23:48:24,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1081 [2020-09-24 23:48:24,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:48:24,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 23:48:24,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 23:48:24,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-24 23:48:24,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:48:24,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 23:48:24,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:48:24,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:48:24,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:48:24,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 23:48:24,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:48:24,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 23:48:24,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:48:24,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:48:24,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:48:24,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:48:24,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:48:24,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 23:48:24,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:48:24,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:48:24,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:48:24,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-09-24 23:48:24,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:48:24,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 166 [2020-09-24 23:48:24,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:48:24,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 23:48:24,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 23:48:24,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-09-24 23:48:24,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:48:24,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-24 23:48:24,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:48:24,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:48:24,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:48:24,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-24 23:48:24,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:48:24,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 131 [2020-09-24 23:48:24,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:48:24,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-24 23:48:24,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:48:24,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-24 23:48:24,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:48:24,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-24 23:48:24,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:48:25,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:48:25,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:48:25,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-24 23:48:25,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:48:25,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-09-24 23:48:25,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:48:25,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 23:48:25,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:48:25,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 23:48:25,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:48:25,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-24 23:48:25,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:48:25,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:48:25,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:48:25,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 23:48:25,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:48:25,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 23:48:25,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:48:25,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 23:48:25,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:48:25,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 23:48:25,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:48:25,113 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-09-24 23:48:25,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [750328634] [2020-09-24 23:48:25,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 23:48:25,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 23:48:25,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317448342] [2020-09-24 23:48:25,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 23:48:25,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 23:48:25,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 23:48:25,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-24 23:48:25,119 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 9 states. [2020-09-24 23:48:25,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 23:48:25,288 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2020-09-24 23:48:25,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 23:48:25,289 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 40 [2020-09-24 23:48:25,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 23:48:25,290 INFO L225 Difference]: With dead ends: 44 [2020-09-24 23:48:25,291 INFO L226 Difference]: Without dead ends: 38 [2020-09-24 23:48:25,292 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-09-24 23:48:25,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-09-24 23:48:25,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-09-24 23:48:25,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-24 23:48:25,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-09-24 23:48:25,308 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 40 [2020-09-24 23:48:25,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 23:48:25,309 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-09-24 23:48:25,309 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 23:48:25,309 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-09-24 23:48:25,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-24 23:48:25,312 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 23:48:25,312 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 23:48:25,313 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 23:48:25,313 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 23:48:25,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 23:48:25,313 INFO L82 PathProgramCache]: Analyzing trace with hash -649675855, now seen corresponding path program 4 times [2020-09-24 23:48:25,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 23:48:25,317 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [400292672] [2020-09-24 23:48:25,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 23:48:25,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:48:25,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:48:25,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:48:26,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:48:26,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-09-24 23:48:26,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 23:48:26,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1410 [2020-09-24 23:48:26,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:48:26,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-24 23:48:26,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 23:48:26,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-24 23:48:26,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:48:26,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 23:48:26,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:48:26,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:48:26,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:48:26,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 23:48:26,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:48:26,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 23:48:26,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:48:26,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:48:26,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:48:26,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:48:26,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:48:26,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 23:48:26,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:48:26,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:48:26,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:48:26,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-09-24 23:48:26,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:48:26,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 184 [2020-09-24 23:48:26,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:48:26,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-24 23:48:26,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 23:48:26,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-09-24 23:48:26,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:48:26,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-24 23:48:26,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:48:26,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:48:27,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:48:27,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-09-24 23:48:27,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:48:27,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 153 [2020-09-24 23:48:27,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:48:27,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-24 23:48:27,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:48:27,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-24 23:48:27,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:48:27,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-24 23:48:27,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:48:27,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:48:27,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:48:27,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-24 23:48:27,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:48:27,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 79 [2020-09-24 23:48:27,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:48:27,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-24 23:48:27,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:48:27,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-24 23:48:27,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:48:27,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-24 23:48:27,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:48:27,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:48:27,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:48:27,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-24 23:48:27,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:48:27,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-09-24 23:48:27,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:48:27,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 23:48:27,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:48:27,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 23:48:27,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:48:27,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-24 23:48:27,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:48:27,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:48:27,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:48:27,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 23:48:27,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:48:27,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 23:48:27,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:48:27,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 23:48:27,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:48:27,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 23:48:27,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:48:27,391 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-09-24 23:48:27,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [400292672] [2020-09-24 23:48:27,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 23:48:27,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 23:48:27,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300141260] [2020-09-24 23:48:27,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 23:48:27,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 23:48:27,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 23:48:27,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-09-24 23:48:27,393 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 10 states. [2020-09-24 23:48:27,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 23:48:27,490 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-09-24 23:48:27,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 23:48:27,491 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 48 [2020-09-24 23:48:27,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 23:48:27,493 INFO L225 Difference]: With dead ends: 49 [2020-09-24 23:48:27,493 INFO L226 Difference]: Without dead ends: 43 [2020-09-24 23:48:27,494 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-09-24 23:48:27,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-24 23:48:27,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-09-24 23:48:27,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-09-24 23:48:27,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-09-24 23:48:27,501 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 48 [2020-09-24 23:48:27,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 23:48:27,502 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-09-24 23:48:27,502 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 23:48:27,502 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-09-24 23:48:27,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-09-24 23:48:27,504 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 23:48:27,504 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 23:48:27,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 23:48:27,504 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 23:48:27,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 23:48:27,505 INFO L82 PathProgramCache]: Analyzing trace with hash 899977063, now seen corresponding path program 5 times [2020-09-24 23:48:27,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 23:48:27,505 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [211836975] [2020-09-24 23:48:27,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 23:48:27,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 23:48:27,518 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 23:48:27,518 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 23:48:27,523 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 23:48:27,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 11:48:27 BoogieIcfgContainer [2020-09-24 23:48:27,547 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 23:48:27,551 INFO L168 Benchmark]: Toolchain (without parser) took 7403.16 ms. Allocated memory was 140.5 MB in the beginning and 275.8 MB in the end (delta: 135.3 MB). Free memory was 103.8 MB in the beginning and 136.8 MB in the end (delta: -33.0 MB). Peak memory consumption was 102.3 MB. Max. memory is 7.1 GB. [2020-09-24 23:48:27,552 INFO L168 Benchmark]: CDTParser took 0.98 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-24 23:48:27,553 INFO L168 Benchmark]: CACSL2BoogieTranslator took 307.06 ms. Allocated memory is still 140.5 MB. Free memory was 103.1 MB in the beginning and 94.0 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. [2020-09-24 23:48:27,554 INFO L168 Benchmark]: Boogie Preprocessor took 35.68 ms. Allocated memory is still 140.5 MB. Free memory was 94.0 MB in the beginning and 92.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-09-24 23:48:27,555 INFO L168 Benchmark]: RCFGBuilder took 367.44 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 92.6 MB in the beginning and 170.9 MB in the end (delta: -78.2 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-09-24 23:48:27,556 INFO L168 Benchmark]: TraceAbstraction took 6679.58 ms. Allocated memory was 202.9 MB in the beginning and 275.8 MB in the end (delta: 72.9 MB). Free memory was 170.2 MB in the beginning and 136.8 MB in the end (delta: 33.4 MB). Peak memory consumption was 106.3 MB. Max. memory is 7.1 GB. [2020-09-24 23:48:27,559 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.98 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 307.06 ms. Allocated memory is still 140.5 MB. Free memory was 103.1 MB in the beginning and 94.0 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 35.68 ms. Allocated memory is still 140.5 MB. Free memory was 94.0 MB in the beginning and 92.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 367.44 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 92.6 MB in the beginning and 170.9 MB in the end (delta: -78.2 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6679.58 ms. Allocated memory was 202.9 MB in the beginning and 275.8 MB in the end (delta: 72.9 MB). Free memory was 170.2 MB in the beginning and 136.8 MB in the end (delta: 33.4 MB). Peak memory consumption was 106.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] int input = 5; [L11] CALL, EXPR id(input) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND TRUE x==0 [L5] return 0; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L11] RET, EXPR id(input) [L11] int result = id(input); [L12] COND TRUE result == 5 [L13] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.5s, OverallIterations: 6, TraceHistogramMax: 6, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 94 SDtfs, 142 SDslu, 275 SDs, 0 SdLazy, 116 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 86 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 5.5s InterpolantComputationTime, 216 NumberOfCodeBlocks, 216 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 155 ConstructedInterpolants, 0 QuantifiedInterpolants, 13192 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 44/120 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...