/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 SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-lopstr16/sum_multi_array.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 10:22:29,114 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 10:22:29,118 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 10:22:29,145 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 10:22:29,146 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 10:22:29,147 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 10:22:29,149 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 10:22:29,151 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 10:22:29,153 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 10:22:29,154 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 10:22:29,159 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 10:22:29,161 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 10:22:29,162 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 10:22:29,167 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 10:22:29,169 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 10:22:29,172 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 10:22:29,174 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 10:22:29,175 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 10:22:29,181 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 10:22:29,188 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 10:22:29,193 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 10:22:29,195 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 10:22:29,196 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 10:22:29,200 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 10:22:29,208 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 10:22:29,209 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 10:22:29,209 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 10:22:29,215 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 10:22:29,216 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 10:22:29,217 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 10:22:29,219 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 10:22:29,220 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 10:22:29,221 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 10:22:29,222 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 10:22:29,225 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 10:22:29,225 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 10:22:29,239 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 10:22:29,239 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 10:22:29,239 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 10:22:29,241 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 10:22:29,242 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 10:22:29,243 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-12 10:22:29,269 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 10:22:29,270 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 10:22:29,271 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 10:22:29,272 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 10:22:29,272 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 10:22:29,272 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 10:22:29,272 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 10:22:29,273 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 10:22:29,273 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 10:22:29,273 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 10:22:29,273 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 10:22:29,273 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 10:22:29,274 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 10:22:29,274 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 10:22:29,274 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 10:22:29,274 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 10:22:29,274 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 10:22:29,275 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 10:22:29,275 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 10:22:29,275 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 10:22:29,275 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 10:22:29,275 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 10:22:29,276 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 10:22:29,276 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 10:22:29,276 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 10:22:29,276 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 10:22:29,276 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 10:22:29,277 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 10:22:29,277 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 10:22:29,277 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 -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 10:22:29,649 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 10:22:29,665 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 10:22:29,670 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 10:22:29,672 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 10:22:29,673 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 10:22:29,674 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-lopstr16/sum_multi_array.i [2020-10-12 10:22:29,780 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4fc8f1da2/3f5a97a0c10a4d8fbca0498f67c28c1b/FLAGf19c309d3 [2020-10-12 10:22:30,391 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 10:22:30,392 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-lopstr16/sum_multi_array.i [2020-10-12 10:22:30,401 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4fc8f1da2/3f5a97a0c10a4d8fbca0498f67c28c1b/FLAGf19c309d3 [2020-10-12 10:22:30,698 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4fc8f1da2/3f5a97a0c10a4d8fbca0498f67c28c1b [2020-10-12 10:22:30,708 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 10:22:30,711 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 10:22:30,712 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 10:22:30,713 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 10:22:30,717 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 10:22:30,719 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 10:22:30" (1/1) ... [2020-10-12 10:22:30,723 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c4baf12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:22:30, skipping insertion in model container [2020-10-12 10:22:30,723 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 10:22:30" (1/1) ... [2020-10-12 10:22:30,734 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 10:22:30,756 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 10:22:30,999 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 10:23:21,599 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 10:23:21,623 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 10:23:21,667 INFO L208 MainTranslator]: Completed translation [2020-10-12 10:23:21,668 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:23:21 WrapperNode [2020-10-12 10:23:21,669 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 10:23:21,671 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 10:23:21,672 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 10:23:21,672 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 10:23:21,694 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:23:21" (1/1) ... [2020-10-12 10:23:21,696 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:23:21" (1/1) ... [2020-10-12 10:23:21,716 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:23:21" (1/1) ... [2020-10-12 10:23:21,718 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:23:21" (1/1) ... [2020-10-12 10:23:21,753 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:23:21" (1/1) ... [2020-10-12 10:23:21,763 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:23:21" (1/1) ... [2020-10-12 10:23:21,771 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:23:21" (1/1) ... [2020-10-12 10:23:21,778 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 10:23:21,780 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 10:23:21,780 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 10:23:21,780 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 10:23:21,782 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:23:21" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 10:23:22,856 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 10:23:22,856 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 10:23:22,856 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 10:23:22,856 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 10:23:22,857 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 10:23:22,857 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 10:23:22,857 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 10:23:22,857 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 10:23:22,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 10:23:22,858 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 10:23:22,858 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 10:23:22,858 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 10:23:22,858 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 10:23:22,858 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 10:23:23,189 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 10:23:23,190 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-12 10:23:23,196 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 10:23:23 BoogieIcfgContainer [2020-10-12 10:23:23,196 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 10:23:23,198 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 10:23:23,198 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 10:23:23,213 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 10:23:23,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 10:22:30" (1/3) ... [2020-10-12 10:23:23,215 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8d5d5ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 10:23:23, skipping insertion in model container [2020-10-12 10:23:23,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:23:21" (2/3) ... [2020-10-12 10:23:23,216 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8d5d5ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 10:23:23, skipping insertion in model container [2020-10-12 10:23:23,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 10:23:23" (3/3) ... [2020-10-12 10:23:23,219 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_multi_array.i [2020-10-12 10:23:23,240 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 10:23:23,257 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 10:23:23,280 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 10:23:23,320 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 10:23:23,320 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 10:23:23,321 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 10:23:23,321 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 10:23:23,321 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 10:23:23,321 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 10:23:23,322 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 10:23:23,322 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 10:23:23,352 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-10-12 10:23:23,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-12 10:23:23,362 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:23:23,363 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:23:23,364 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:23:23,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:23:23,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1778002988, now seen corresponding path program 1 times [2020-10-12 10:23:23,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:23:23,401 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1626448405] [2020-10-12 10:23:23,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:23:23,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:23:23,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:23:23,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:23:24,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:23:24,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:23:24,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-12 10:23:24,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:23:24,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 942 [2020-10-12 10:23:24,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:23:24,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 10:23:24,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 10:23:24,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 10:23:24,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-12 10:23:25,125 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 20 [2020-10-12 10:23:25,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:23:25,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:23:25,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:23:25,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:23:25,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:23:25,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:23:25,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-12 10:23:25,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:23:25,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:23:25,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:23:25,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 10:23:25,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:23:25,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:23:25,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1626448405] [2020-10-12 10:23:25,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 10:23:25,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 10:23:25,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174363454] [2020-10-12 10:23:25,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 10:23:25,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:23:25,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 10:23:25,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 10:23:25,420 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 7 states. [2020-10-12 10:23:26,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:23:26,059 INFO L93 Difference]: Finished difference Result 64 states and 82 transitions. [2020-10-12 10:23:26,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 10:23:26,062 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-10-12 10:23:26,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:23:26,074 INFO L225 Difference]: With dead ends: 64 [2020-10-12 10:23:26,074 INFO L226 Difference]: Without dead ends: 23 [2020-10-12 10:23:26,081 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-12 10:23:26,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-12 10:23:26,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-12 10:23:26,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-12 10:23:26,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-10-12 10:23:26,152 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 15 [2020-10-12 10:23:26,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:23:26,153 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-10-12 10:23:26,153 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 10:23:26,153 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-10-12 10:23:26,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-12 10:23:26,154 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:23:26,154 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:23:26,155 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 10:23:26,156 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:23:26,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:23:26,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1578997828, now seen corresponding path program 1 times [2020-10-12 10:23:26,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:23:26,157 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2009904680] [2020-10-12 10:23:26,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:23:26,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:23:26,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:23:26,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:23:26,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:23:26,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:23:26,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-12 10:23:26,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:23:26,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 738 [2020-10-12 10:23:26,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:23:26,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 10:23:26,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 10:23:26,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 10:23:26,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:23:27,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:23:27,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:23:27,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:23:27,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:23:27,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:23:27,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:23:27,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-12 10:23:27,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:23:27,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:23:27,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:23:27,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 10:23:27,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:23:27,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:23:27,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2009904680] [2020-10-12 10:23:27,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:23:27,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 10:23:27,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414918017] [2020-10-12 10:23:27,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 10:23:27,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:23:27,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 10:23:27,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-12 10:23:27,600 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 11 states. [2020-10-12 10:23:27,901 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2020-10-12 10:23:28,248 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2020-10-12 10:23:28,572 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 56 [2020-10-12 10:23:29,136 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 63 [2020-10-12 10:23:29,338 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-10-12 10:23:29,538 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-10-12 10:23:29,993 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-10-12 10:23:30,200 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-10-12 10:23:30,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:23:30,283 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2020-10-12 10:23:30,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 10:23:30,284 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 17 [2020-10-12 10:23:30,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:23:30,287 INFO L225 Difference]: With dead ends: 60 [2020-10-12 10:23:30,287 INFO L226 Difference]: Without dead ends: 49 [2020-10-12 10:23:30,289 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2020-10-12 10:23:30,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-12 10:23:30,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 36. [2020-10-12 10:23:30,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-12 10:23:30,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-10-12 10:23:30,320 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 17 [2020-10-12 10:23:30,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:23:30,321 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-10-12 10:23:30,321 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 10:23:30,321 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-10-12 10:23:30,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-12 10:23:30,324 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:23:30,325 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:23:30,325 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 10:23:30,326 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:23:30,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:23:30,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1416793826, now seen corresponding path program 2 times [2020-10-12 10:23:30,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:23:30,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1687791123] [2020-10-12 10:23:30,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:23:30,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:23:30,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:23:30,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:23:30,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:23:31,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:23:31,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-12 10:23:31,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:23:31,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 925 [2020-10-12 10:23:31,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:23:31,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 10:23:31,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 10:23:31,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 10:23:31,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:23:31,858 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2020-10-12 10:23:32,101 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2020-10-12 10:23:32,712 WARN L193 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 81 [2020-10-12 10:23:35,383 WARN L193 SmtUtils]: Spent 2.56 s on a formula simplification. DAG size of input: 91 DAG size of output: 76 [2020-10-12 10:23:35,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:23:35,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:23:35,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:23:35,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:23:35,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:23:35,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:23:35,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-12 10:23:35,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:23:35,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:23:35,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:23:35,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 10:23:35,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:23:35,754 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:23:35,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1687791123] [2020-10-12 10:23:35,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:23:35,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 10:23:35,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285044608] [2020-10-12 10:23:35,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 10:23:35,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:23:35,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 10:23:35,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-12 10:23:35,758 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 13 states. [2020-10-12 10:23:36,425 WARN L193 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2020-10-12 10:23:37,040 WARN L193 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 68 [2020-10-12 10:23:38,297 WARN L193 SmtUtils]: Spent 775.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2020-10-12 10:23:40,072 WARN L193 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 103 DAG size of output: 96 [2020-10-12 10:23:42,669 WARN L193 SmtUtils]: Spent 1.55 s on a formula simplification. DAG size of input: 111 DAG size of output: 104 [2020-10-12 10:23:44,160 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification that was a NOOP. DAG size: 104 [2020-10-12 10:23:51,047 WARN L193 SmtUtils]: Spent 6.69 s on a formula simplification that was a NOOP. DAG size: 107 [2020-10-12 10:23:56,309 WARN L193 SmtUtils]: Spent 4.56 s on a formula simplification that was a NOOP. DAG size: 101 [2020-10-12 10:23:58,997 WARN L193 SmtUtils]: Spent 2.44 s on a formula simplification that was a NOOP. DAG size: 104 [2020-10-12 10:23:59,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:23:59,259 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2020-10-12 10:23:59,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 10:23:59,259 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 19 [2020-10-12 10:23:59,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:23:59,265 INFO L225 Difference]: With dead ends: 64 [2020-10-12 10:23:59,266 INFO L226 Difference]: Without dead ends: 62 [2020-10-12 10:23:59,267 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 24.6s TimeCoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2020-10-12 10:23:59,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-12 10:23:59,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 40. [2020-10-12 10:23:59,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-12 10:23:59,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2020-10-12 10:23:59,282 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 19 [2020-10-12 10:23:59,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:23:59,283 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2020-10-12 10:23:59,283 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 10:23:59,283 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2020-10-12 10:23:59,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-12 10:23:59,284 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:23:59,284 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:23:59,285 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 10:23:59,285 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:23:59,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:23:59,286 INFO L82 PathProgramCache]: Analyzing trace with hash 515736960, now seen corresponding path program 1 times [2020-10-12 10:23:59,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:23:59,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [774479522] [2020-10-12 10:23:59,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:23:59,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:23:59,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:23:59,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:23:59,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:24:00,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:24:00,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:24:00,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:24:04,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:24:04,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-12 10:24:04,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:24:04,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4968 [2020-10-12 10:24:04,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:24:04,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 10:24:04,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 10:24:04,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 10:24:04,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-10-12 10:24:11,638 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2020-10-12 10:24:11,829 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2020-10-12 10:24:12,781 WARN L193 SmtUtils]: Spent 875.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 65 [2020-10-12 10:24:13,425 WARN L193 SmtUtils]: Spent 561.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 41 [2020-10-12 10:24:15,613 WARN L193 SmtUtils]: Spent 1.96 s on a formula simplification. DAG size of input: 282 DAG size of output: 67 [2020-10-12 10:24:23,134 WARN L193 SmtUtils]: Spent 5.96 s on a formula simplification. DAG size of input: 418 DAG size of output: 141 [2020-10-12 10:24:41,892 WARN L193 SmtUtils]: Spent 17.68 s on a formula simplification. DAG size of input: 785 DAG size of output: 167 [2020-10-12 10:25:00,652 WARN L193 SmtUtils]: Spent 15.45 s on a formula simplification. DAG size of input: 773 DAG size of output: 139 [2020-10-12 10:25:02,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:25:02,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:25:02,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:02,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:25:02,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:25:02,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:25:02,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-12 10:25:02,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:25:02,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:25:02,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:25:02,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 10:25:02,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:25:02,962 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:25:02,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [774479522] [2020-10-12 10:25:02,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:25:02,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 10:25:02,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365194069] [2020-10-12 10:25:02,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 10:25:02,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:25:02,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 10:25:02,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-12 10:25:02,965 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 14 states. [2020-10-12 10:25:03,412 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2020-10-12 10:25:04,016 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 42 [2020-10-12 10:25:04,853 WARN L193 SmtUtils]: Spent 525.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 60 [2020-10-12 10:25:06,017 WARN L193 SmtUtils]: Spent 871.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 82 [2020-10-12 10:25:07,331 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 141 DAG size of output: 82 [2020-10-12 10:25:09,673 WARN L193 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 164 DAG size of output: 85 [2020-10-12 10:25:11,688 WARN L193 SmtUtils]: Spent 1.76 s on a formula simplification. DAG size of input: 216 DAG size of output: 92 [2020-10-12 10:25:13,818 WARN L193 SmtUtils]: Spent 1.84 s on a formula simplification. DAG size of input: 170 DAG size of output: 104 [2020-10-12 10:25:16,131 WARN L193 SmtUtils]: Spent 1.96 s on a formula simplification. DAG size of input: 221 DAG size of output: 97 [2020-10-12 10:25:19,743 WARN L193 SmtUtils]: Spent 3.25 s on a formula simplification. DAG size of input: 149 DAG size of output: 99 [2020-10-12 10:25:22,614 WARN L193 SmtUtils]: Spent 2.39 s on a formula simplification. DAG size of input: 169 DAG size of output: 110 [2020-10-12 10:25:26,889 WARN L193 SmtUtils]: Spent 3.65 s on a formula simplification. DAG size of input: 213 DAG size of output: 109 [2020-10-12 10:25:28,923 WARN L193 SmtUtils]: Spent 1.81 s on a formula simplification. DAG size of input: 171 DAG size of output: 112 [2020-10-12 10:25:33,160 WARN L193 SmtUtils]: Spent 3.74 s on a formula simplification. DAG size of input: 218 DAG size of output: 114 [2020-10-12 10:25:36,885 WARN L193 SmtUtils]: Spent 3.25 s on a formula simplification. DAG size of input: 177 DAG size of output: 127 [2020-10-12 10:25:42,506 WARN L193 SmtUtils]: Spent 5.17 s on a formula simplification. DAG size of input: 179 DAG size of output: 129 [2020-10-12 10:25:43,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:25:43,614 INFO L93 Difference]: Finished difference Result 71 states and 80 transitions. [2020-10-12 10:25:43,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 10:25:43,618 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 21 [2020-10-12 10:25:43,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:25:43,619 INFO L225 Difference]: With dead ends: 71 [2020-10-12 10:25:43,620 INFO L226 Difference]: Without dead ends: 38 [2020-10-12 10:25:43,624 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 88.9s TimeCoverageRelationStatistics Valid=228, Invalid=702, Unknown=0, NotChecked=0, Total=930 [2020-10-12 10:25:43,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-12 10:25:43,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-12 10:25:43,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-12 10:25:43,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-10-12 10:25:43,635 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 21 [2020-10-12 10:25:43,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:25:43,635 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-10-12 10:25:43,635 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 10:25:43,636 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-10-12 10:25:43,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-12 10:25:43,636 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:25:43,637 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:25:43,637 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 10:25:43,637 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:25:43,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:25:43,638 INFO L82 PathProgramCache]: Analyzing trace with hash 157570560, now seen corresponding path program 3 times [2020-10-12 10:25:43,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:25:43,638 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1369575343] [2020-10-12 10:25:43,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:25:43,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:25:43,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:43,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:43,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:44,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:25:44,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-12 10:25:44,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:25:44,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 652 [2020-10-12 10:25:44,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:25:44,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 10:25:44,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 10:25:44,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 10:25:44,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:25:45,129 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-12 10:25:45,446 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-10-12 10:25:46,648 WARN L193 SmtUtils]: Spent 855.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 82 [2020-10-12 10:25:48,689 WARN L193 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 122 DAG size of output: 85 [2020-10-12 10:25:52,076 WARN L193 SmtUtils]: Spent 1.82 s on a formula simplification. DAG size of input: 179 DAG size of output: 107 [2020-10-12 10:25:56,456 WARN L193 SmtUtils]: Spent 3.77 s on a formula simplification. DAG size of input: 167 DAG size of output: 107 [2020-10-12 10:25:56,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:25:56,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:25:56,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:56,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:25:56,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:25:56,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:25:56,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-12 10:25:56,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:25:56,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:25:56,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:25:56,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 10:25:56,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:25:56,901 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:25:56,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1369575343] [2020-10-12 10:25:56,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:25:56,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 10:25:56,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024119643] [2020-10-12 10:25:56,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 10:25:56,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:25:56,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 10:25:56,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-12 10:25:56,903 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 15 states. [2020-10-12 10:25:57,192 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2020-10-12 10:25:58,993 WARN L193 SmtUtils]: Spent 895.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 95