/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/loops/sum_array-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 16:25:43,207 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 16:25:43,211 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 16:25:43,252 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 16:25:43,252 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 16:25:43,257 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 16:25:43,259 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 16:25:43,261 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 16:25:43,267 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 16:25:43,268 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 16:25:43,268 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 16:25:43,270 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 16:25:43,270 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 16:25:43,271 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 16:25:43,272 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 16:25:43,273 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 16:25:43,273 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 16:25:43,274 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 16:25:43,275 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 16:25:43,277 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 16:25:43,278 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 16:25:43,279 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 16:25:43,280 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 16:25:43,281 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 16:25:43,283 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 16:25:43,283 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 16:25:43,284 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 16:25:43,285 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 16:25:43,285 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 16:25:43,286 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 16:25:43,286 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 16:25:43,287 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 16:25:43,288 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 16:25:43,289 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 16:25:43,290 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 16:25:43,290 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 16:25:43,290 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 16:25:43,291 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 16:25:43,291 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 16:25:43,292 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 16:25:43,292 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 16:25:43,293 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 16:25:43,314 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 16:25:43,315 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 16:25:43,316 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 16:25:43,316 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 16:25:43,316 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 16:25:43,317 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 16:25:43,317 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 16:25:43,317 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 16:25:43,317 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 16:25:43,317 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 16:25:43,318 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 16:25:43,318 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 16:25:43,318 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 16:25:43,318 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 16:25:43,318 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 16:25:43,318 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 16:25:43,319 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 16:25:43,319 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 16:25:43,319 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 16:25:43,319 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 16:25:43,319 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 16:25:43,320 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 16:25:43,320 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 16:25:43,320 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 16:25:43,320 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 16:25:43,321 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 16:25:43,321 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 16:25:43,321 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 16:25:43,321 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 16:25:43,321 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 16:25:43,622 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 16:25:43,642 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 16:25:43,647 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 16:25:43,650 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 16:25:43,650 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 16:25:43,651 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum_array-2.i [2020-10-12 16:25:43,712 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6b8b38485/b955c0e147f34fb79795b19861faf2e2/FLAG4646a9174 [2020-10-12 16:25:44,197 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 16:25:44,198 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum_array-2.i [2020-10-12 16:25:44,206 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6b8b38485/b955c0e147f34fb79795b19861faf2e2/FLAG4646a9174 [2020-10-12 16:25:44,608 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6b8b38485/b955c0e147f34fb79795b19861faf2e2 [2020-10-12 16:25:44,617 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 16:25:44,618 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 16:25:44,619 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 16:25:44,620 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 16:25:44,623 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 16:25:44,624 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 04:25:44" (1/1) ... [2020-10-12 16:25:44,628 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53d96e6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:25:44, skipping insertion in model container [2020-10-12 16:25:44,628 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 04:25:44" (1/1) ... [2020-10-12 16:25:44,636 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 16:25:44,655 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 16:25:44,832 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 16:25:44,836 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 16:25:44,863 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 16:25:44,883 INFO L208 MainTranslator]: Completed translation [2020-10-12 16:25:44,884 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:25:44 WrapperNode [2020-10-12 16:25:44,884 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 16:25:44,885 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 16:25:44,885 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 16:25:44,885 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 16:25:44,988 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:25:44" (1/1) ... [2020-10-12 16:25:44,988 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:25:44" (1/1) ... [2020-10-12 16:25:44,996 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:25:44" (1/1) ... [2020-10-12 16:25:44,997 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:25:44" (1/1) ... [2020-10-12 16:25:45,006 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:25:44" (1/1) ... [2020-10-12 16:25:45,012 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:25:44" (1/1) ... [2020-10-12 16:25:45,014 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:25:44" (1/1) ... [2020-10-12 16:25:45,016 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 16:25:45,017 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 16:25:45,017 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 16:25:45,017 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 16:25:45,018 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:25:44" (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 16:25:45,073 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 16:25:45,073 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 16:25:45,073 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 16:25:45,073 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 16:25:45,074 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 16:25:45,074 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 16:25:45,074 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 16:25:45,074 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 16:25:45,074 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 16:25:45,074 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 16:25:45,075 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-12 16:25:45,075 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 16:25:45,075 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 16:25:45,075 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 16:25:45,075 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 16:25:45,075 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 16:25:45,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 16:25:45,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 16:25:45,399 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 16:25:45,400 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-12 16:25:45,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 04:25:45 BoogieIcfgContainer [2020-10-12 16:25:45,404 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 16:25:45,405 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 16:25:45,405 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 16:25:45,408 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 16:25:45,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 04:25:44" (1/3) ... [2020-10-12 16:25:45,409 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@352322aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 04:25:45, skipping insertion in model container [2020-10-12 16:25:45,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:25:44" (2/3) ... [2020-10-12 16:25:45,410 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@352322aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 04:25:45, skipping insertion in model container [2020-10-12 16:25:45,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 04:25:45" (3/3) ... [2020-10-12 16:25:45,412 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_array-2.i [2020-10-12 16:25:45,424 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 16:25:45,431 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 16:25:45,444 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 16:25:45,465 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 16:25:45,465 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 16:25:45,465 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 16:25:45,465 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 16:25:45,465 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 16:25:45,465 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 16:25:45,466 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 16:25:45,466 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 16:25:45,482 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-10-12 16:25:45,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-12 16:25:45,490 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:25:45,490 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 16:25:45,491 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:25:45,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:25:45,496 INFO L82 PathProgramCache]: Analyzing trace with hash -987676678, now seen corresponding path program 1 times [2020-10-12 16:25:45,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:25:45,504 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1400684554] [2020-10-12 16:25:45,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:25:45,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:25:45,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:45,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:45,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:46,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:25:46,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-12 16:25:46,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:25:46,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 805 [2020-10-12 16:25:46,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:25:46,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 16:25:46,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 16:25:46,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-12 16:25:46,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-12 16:25:46,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:25:46,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:25:46,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:46,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:25:46,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:25:46,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:25:46,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 16:25:46,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:25:46,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:25:46,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:25:46,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:25:46,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:25:46,634 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 16:25:46,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1400684554] [2020-10-12 16:25:46,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 16:25:46,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 16:25:46,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873282174] [2020-10-12 16:25:46,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 16:25:46,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:25:46,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 16:25:46,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 16:25:46,667 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 5 states. [2020-10-12 16:25:46,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:25:46,991 INFO L93 Difference]: Finished difference Result 78 states and 114 transitions. [2020-10-12 16:25:46,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 16:25:46,993 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-10-12 16:25:46,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:25:47,003 INFO L225 Difference]: With dead ends: 78 [2020-10-12 16:25:47,003 INFO L226 Difference]: Without dead ends: 39 [2020-10-12 16:25:47,007 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:25:47,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-12 16:25:47,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2020-10-12 16:25:47,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-12 16:25:47,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-10-12 16:25:47,054 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 17 [2020-10-12 16:25:47,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:25:47,054 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-10-12 16:25:47,055 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 16:25:47,055 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-10-12 16:25:47,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-12 16:25:47,056 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:25:47,056 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:25:47,056 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 16:25:47,057 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:25:47,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:25:47,057 INFO L82 PathProgramCache]: Analyzing trace with hash 552406132, now seen corresponding path program 1 times [2020-10-12 16:25:47,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:25:47,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [383525630] [2020-10-12 16:25:47,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:25:47,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:25:47,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:47,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:47,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:48,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:52,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:25:52,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-12 16:25:52,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:25:52,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-12 16:25:52,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:25:52,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 16:25:52,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:25:52,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 16:25:52,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-12 16:25:52,697 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 34 [2020-10-12 16:25:53,229 WARN L193 SmtUtils]: Spent 470.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 71 [2020-10-12 16:25:53,424 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 52 [2020-10-12 16:25:53,595 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 38 [2020-10-12 16:25:53,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:25:53,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:25:53,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:53,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:25:53,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:25:53,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:25:53,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 16:25:53,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:25:53,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:25:53,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:25:53,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:25:53,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-12 16:25:53,719 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:25:53,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [383525630] [2020-10-12 16:25:53,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:25:53,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 16:25:53,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498164469] [2020-10-12 16:25:53,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 16:25:53,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:25:53,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 16:25:53,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-12 16:25:53,725 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 11 states. [2020-10-12 16:25:54,097 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 52 [2020-10-12 16:25:54,234 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2020-10-12 16:25:54,375 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-10-12 16:25:54,609 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 52 [2020-10-12 16:25:54,879 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 57 [2020-10-12 16:25:55,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:25:55,211 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2020-10-12 16:25:55,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 16:25:55,212 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2020-10-12 16:25:55,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:25:55,214 INFO L225 Difference]: With dead ends: 53 [2020-10-12 16:25:55,214 INFO L226 Difference]: Without dead ends: 41 [2020-10-12 16:25:55,215 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2020-10-12 16:25:55,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-12 16:25:55,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2020-10-12 16:25:55,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-12 16:25:55,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-10-12 16:25:55,225 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 25 [2020-10-12 16:25:55,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:25:55,226 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-10-12 16:25:55,226 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 16:25:55,226 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-10-12 16:25:55,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-12 16:25:55,228 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:25:55,228 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:25:55,228 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 16:25:55,229 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:25:55,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:25:55,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1717064974, now seen corresponding path program 2 times [2020-10-12 16:25:55,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:25:55,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1645453925] [2020-10-12 16:25:55,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:25:55,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:25:55,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:55,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:55,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:55,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:55,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:56,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:00,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:26:00,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-12 16:26:00,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 16:26:00,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 16:26:00,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:26:00,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 16:26:00,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:26:00,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 16:26:00,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:26:00,641 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 25 [2020-10-12 16:26:00,887 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 44 [2020-10-12 16:26:01,206 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 47 [2020-10-12 16:26:01,702 WARN L193 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 67 [2020-10-12 16:26:01,972 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 72 [2020-10-12 16:26:02,177 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 58 [2020-10-12 16:26:02,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:26:02,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:26:02,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:02,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:26:02,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:26:02,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:26:02,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 16:26:02,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:26:02,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:26:02,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:26:02,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:26:02,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:26:02,294 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:26:02,294 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1645453925] [2020-10-12 16:26:02,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:26:02,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 16:26:02,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954702949] [2020-10-12 16:26:02,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 16:26:02,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:26:02,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 16:26:02,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:26:02,298 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 13 states. [2020-10-12 16:26:02,644 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-10-12 16:26:02,878 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 73 [2020-10-12 16:26:03,194 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 70 [2020-10-12 16:26:03,477 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2020-10-12 16:26:03,698 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-10-12 16:26:03,925 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 73 [2020-10-12 16:26:04,142 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 67 [2020-10-12 16:26:04,407 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 79 [2020-10-12 16:26:04,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:26:04,562 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2020-10-12 16:26:04,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 16:26:04,569 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 27 [2020-10-12 16:26:04,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:26:04,570 INFO L225 Difference]: With dead ends: 66 [2020-10-12 16:26:04,570 INFO L226 Difference]: Without dead ends: 43 [2020-10-12 16:26:04,572 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2020-10-12 16:26:04,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-12 16:26:04,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-10-12 16:26:04,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-12 16:26:04,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-10-12 16:26:04,582 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 27 [2020-10-12 16:26:04,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:26:04,582 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-10-12 16:26:04,582 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 16:26:04,582 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-10-12 16:26:04,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-12 16:26:04,585 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:26:04,586 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:26:04,586 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 16:26:04,586 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:26:04,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:26:04,587 INFO L82 PathProgramCache]: Analyzing trace with hash -835411472, now seen corresponding path program 3 times [2020-10-12 16:26:04,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:26:04,587 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [966788509] [2020-10-12 16:26:04,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:26:04,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:26:04,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:04,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:04,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:04,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:04,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:05,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:05,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:05,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:05,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:05,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:06,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:06,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:07,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:07,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:09,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:26:09,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-12 16:26:09,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-12 16:26:09,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-12 16:26:09,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:26:09,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 16:26:09,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:26:09,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 16:26:09,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:26:10,142 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 19 [2020-10-12 16:26:10,392 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 25 [2020-10-12 16:26:10,776 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 50 [2020-10-12 16:26:11,088 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 52 [2020-10-12 16:26:11,398 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 51 [2020-10-12 16:26:12,209 WARN L193 SmtUtils]: Spent 706.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 71 [2020-10-12 16:26:12,797 WARN L193 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 68 [2020-10-12 16:26:13,341 WARN L193 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 93 [2020-10-12 16:26:13,844 WARN L193 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 94 [2020-10-12 16:26:13,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:26:13,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:26:13,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:13,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:26:13,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:26:13,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:26:13,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:26:13,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:26:13,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:26:13,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:26:13,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:26:13,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:26:13,968 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:26:13,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [966788509] [2020-10-12 16:26:13,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:26:13,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 16:26:13,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179291395] [2020-10-12 16:26:13,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 16:26:13,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:26:13,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 16:26:13,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-10-12 16:26:13,971 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 15 states. [2020-10-12 16:26:14,469 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-10-12 16:26:14,768 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 137 [2020-10-12 16:26:15,010 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 101 [2020-10-12 16:26:15,254 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 106 [2020-10-12 16:26:15,783 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 105 [2020-10-12 16:26:16,061 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 81 [2020-10-12 16:26:16,342 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 76 [2020-10-12 16:26:16,665 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 96 [2020-10-12 16:26:16,970 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 82 [2020-10-12 16:26:17,232 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 77 [2020-10-12 16:26:17,614 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 142 [2020-10-12 16:26:17,845 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 86 [2020-10-12 16:26:18,073 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 91 [2020-10-12 16:26:18,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:26:18,105 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2020-10-12 16:26:18,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 16:26:18,107 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 29 [2020-10-12 16:26:18,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:26:18,108 INFO L225 Difference]: With dead ends: 72 [2020-10-12 16:26:18,108 INFO L226 Difference]: Without dead ends: 45 [2020-10-12 16:26:18,110 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=186, Invalid=744, Unknown=0, NotChecked=0, Total=930 [2020-10-12 16:26:18,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-12 16:26:18,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2020-10-12 16:26:18,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-12 16:26:18,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-10-12 16:26:18,118 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 29 [2020-10-12 16:26:18,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:26:18,119 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-10-12 16:26:18,119 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 16:26:18,119 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-10-12 16:26:18,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-12 16:26:18,120 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:26:18,120 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:26:18,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 16:26:18,121 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:26:18,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:26:18,121 INFO L82 PathProgramCache]: Analyzing trace with hash 325046638, now seen corresponding path program 4 times [2020-10-12 16:26:18,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:26:18,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1954215130] [2020-10-12 16:26:18,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:26:18,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:26:18,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:18,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:18,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:18,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:18,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:18,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:18,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:18,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:18,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:19,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:20,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:20,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:20,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:20,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:20,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:21,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:22,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:22,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:23,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:23,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:26:23,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 16:26:23,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-12 16:26:23,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-12 16:26:23,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:26:23,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 16:26:23,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 16:26:23,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 16:26:23,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:26:23,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:26:23,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:26:23,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:23,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:26:23,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:26:23,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:26:23,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:26:23,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:26:23,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:26:23,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:26:23,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:26:23,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:26:23,325 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 16:26:23,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1954215130] [2020-10-12 16:26:23,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:26:23,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 16:26:23,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176674194] [2020-10-12 16:26:23,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 16:26:23,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:26:23,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 16:26:23,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:26:23,329 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 10 states. [2020-10-12 16:26:23,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:26:23,704 INFO L93 Difference]: Finished difference Result 87 states and 97 transitions. [2020-10-12 16:26:23,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 16:26:23,705 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-10-12 16:26:23,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:26:23,706 INFO L225 Difference]: With dead ends: 87 [2020-10-12 16:26:23,707 INFO L226 Difference]: Without dead ends: 54 [2020-10-12 16:26:23,707 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-12 16:26:23,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-12 16:26:23,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 42. [2020-10-12 16:26:23,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-12 16:26:23,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2020-10-12 16:26:23,717 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 31 [2020-10-12 16:26:23,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:26:23,717 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2020-10-12 16:26:23,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 16:26:23,717 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2020-10-12 16:26:23,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 16:26:23,718 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:26:23,718 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:26:23,719 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 16:26:23,719 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:26:23,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:26:23,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1096743000, now seen corresponding path program 5 times [2020-10-12 16:26:23,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:26:23,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [16141017] [2020-10-12 16:26:23,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:26:23,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:26:23,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:23,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:23,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:24,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:24,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:24,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:25,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:26,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:27,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:27,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:28,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:26:28,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-12 16:26:28,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 16:26:28,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-12 16:26:28,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:26:28,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 16:26:28,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:26:28,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 16:26:28,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:26:28,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:26:28,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:26:28,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:28,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:26:28,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:26:28,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:26:28,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 16:26:28,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:26:28,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:26:28,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:26:28,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:26:28,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:26:28,959 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-12 16:26:28,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [16141017] [2020-10-12 16:26:28,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:26:28,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 16:26:28,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352396059] [2020-10-12 16:26:28,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 16:26:28,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:26:28,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 16:26:28,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-12 16:26:28,962 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 11 states. [2020-10-12 16:26:29,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:26:29,512 INFO L93 Difference]: Finished difference Result 102 states and 113 transitions. [2020-10-12 16:26:29,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 16:26:29,513 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-10-12 16:26:29,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:26:29,515 INFO L225 Difference]: With dead ends: 102 [2020-10-12 16:26:29,515 INFO L226 Difference]: Without dead ends: 64 [2020-10-12 16:26:29,516 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-12 16:26:29,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-12 16:26:29,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 48. [2020-10-12 16:26:29,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-12 16:26:29,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2020-10-12 16:26:29,526 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 37 [2020-10-12 16:26:29,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:26:29,527 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2020-10-12 16:26:29,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 16:26:29,527 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2020-10-12 16:26:29,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-12 16:26:29,528 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:26:29,528 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, 1, 1, 1] [2020-10-12 16:26:29,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 16:26:29,529 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:26:29,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:26:29,529 INFO L82 PathProgramCache]: Analyzing trace with hash -86268114, now seen corresponding path program 6 times [2020-10-12 16:26:29,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:26:29,530 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [201108770] [2020-10-12 16:26:29,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:26:29,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:26:29,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:29,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:29,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:30,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:34,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:34,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:26:34,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-12 16:26:34,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 16:26:34,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5203 [2020-10-12 16:26:34,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:26:34,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 16:26:34,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:26:34,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-12 16:26:34,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:26:35,496 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 29 [2020-10-12 16:26:36,103 WARN L193 SmtUtils]: Spent 526.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 47 [2020-10-12 16:26:36,581 WARN L193 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 51 [2020-10-12 16:26:36,930 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 68 [2020-10-12 16:26:37,386 WARN L193 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 69 [2020-10-12 16:26:37,776 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 73 [2020-10-12 16:26:38,510 WARN L193 SmtUtils]: Spent 622.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 81 [2020-10-12 16:26:39,137 WARN L193 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 99 [2020-10-12 16:26:39,688 WARN L193 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 108 [2020-10-12 16:26:40,110 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 84 [2020-10-12 16:26:40,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:26:40,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:26:40,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:40,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:26:40,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:26:40,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:26:40,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:26:40,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:26:40,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:26:40,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:26:40,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:26:40,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:26:40,304 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-12 16:26:40,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [201108770] [2020-10-12 16:26:40,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:26:40,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 16:26:40,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574966817] [2020-10-12 16:26:40,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 16:26:40,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:26:40,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 16:26:40,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2020-10-12 16:26:40,307 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand 17 states. [2020-10-12 16:26:40,857 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 62 [2020-10-12 16:26:41,240 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 70 [2020-10-12 16:26:41,473 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-12 16:26:41,964 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 79 [2020-10-12 16:26:42,435 WARN L193 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 85 [2020-10-12 16:26:42,792 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 101 [2020-10-12 16:26:43,305 WARN L193 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 91 [2020-10-12 16:26:43,634 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 96 [2020-10-12 16:26:43,994 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 102 [2020-10-12 16:26:44,727 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 94 [2020-10-12 16:26:45,349 WARN L193 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 89 [2020-10-12 16:26:45,974 WARN L193 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 83 [2020-10-12 16:26:46,841 WARN L193 SmtUtils]: Spent 653.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 88 [2020-10-12 16:26:47,260 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 81 [2020-10-12 16:26:47,676 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 73 [2020-10-12 16:26:48,565 WARN L193 SmtUtils]: Spent 728.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 92 [2020-10-12 16:26:49,075 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 93 [2020-10-12 16:26:49,847 WARN L193 SmtUtils]: Spent 572.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 92 [2020-10-12 16:26:50,526 WARN L193 SmtUtils]: Spent 488.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 97 [2020-10-12 16:26:50,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:26:50,835 INFO L93 Difference]: Finished difference Result 86 states and 96 transitions. [2020-10-12 16:26:50,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 16:26:50,837 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 43 [2020-10-12 16:26:50,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:26:50,839 INFO L225 Difference]: With dead ends: 86 [2020-10-12 16:26:50,839 INFO L226 Difference]: Without dead ends: 55 [2020-10-12 16:26:50,841 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=248, Invalid=1312, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 16:26:50,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-12 16:26:50,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 50. [2020-10-12 16:26:50,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-12 16:26:50,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2020-10-12 16:26:50,854 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 43 [2020-10-12 16:26:50,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:26:50,854 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2020-10-12 16:26:50,854 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 16:26:50,855 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2020-10-12 16:26:50,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-12 16:26:50,855 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:26:50,856 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:26:50,856 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 16:26:50,856 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:26:50,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:26:50,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1302692052, now seen corresponding path program 7 times [2020-10-12 16:26:50,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:26:50,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [99362306] [2020-10-12 16:26:50,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:26:50,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:26:50,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:50,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:51,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:51,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:51,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:52,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:53,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:54,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:54,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:54,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:55,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:26:55,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-12 16:26:55,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 16:26:55,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-12 16:26:55,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:26:55,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 16:26:55,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:26:55,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 16:26:55,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:26:56,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:26:56,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:26:56,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:56,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:26:56,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:26:56,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:26:56,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:26:56,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:26:56,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:26:56,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:26:56,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:26:56,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:26:56,198 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-12 16:26:56,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [99362306] [2020-10-12 16:26:56,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:26:56,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 16:26:56,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674668627] [2020-10-12 16:26:56,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 16:26:56,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:26:56,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 16:26:56,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:26:56,200 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand 13 states. [2020-10-12 16:26:57,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:26:57,156 INFO L93 Difference]: Finished difference Result 121 states and 133 transitions. [2020-10-12 16:26:57,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 16:26:57,158 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 45 [2020-10-12 16:26:57,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:26:57,159 INFO L225 Difference]: With dead ends: 121 [2020-10-12 16:26:57,160 INFO L226 Difference]: Without dead ends: 76 [2020-10-12 16:26:57,161 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-10-12 16:26:57,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-12 16:26:57,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 56. [2020-10-12 16:26:57,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-12 16:26:57,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2020-10-12 16:26:57,172 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 45 [2020-10-12 16:26:57,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:26:57,173 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2020-10-12 16:26:57,173 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 16:26:57,173 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2020-10-12 16:26:57,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-12 16:26:57,174 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:26:57,174 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, 1, 1, 1] [2020-10-12 16:26:57,174 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 16:26:57,174 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:26:57,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:26:57,175 INFO L82 PathProgramCache]: Analyzing trace with hash 391240550, now seen corresponding path program 8 times [2020-10-12 16:26:57,175 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:26:57,175 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [68173474] [2020-10-12 16:26:57,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:26:57,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:26:57,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:57,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:57,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:00,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:02,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:27:02,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-12 16:27:02,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:27:02,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-12 16:27:02,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:27:02,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 16:27:02,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:27:02,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 16:27:02,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:27:02,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:27:02,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:27:02,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:02,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:27:02,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:27:02,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:27:02,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:27:02,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:27:02,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:27:02,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:27:02,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:27:02,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:27:02,551 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 9 proven. 38 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-12 16:27:02,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [68173474] [2020-10-12 16:27:02,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:27:02,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 16:27:02,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491208617] [2020-10-12 16:27:02,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 16:27:02,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:27:02,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 16:27:02,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-10-12 16:27:02,554 INFO L87 Difference]: Start difference. First operand 56 states and 59 transitions. Second operand 14 states. [2020-10-12 16:27:03,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:27:03,374 INFO L93 Difference]: Finished difference Result 137 states and 150 transitions. [2020-10-12 16:27:03,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 16:27:03,375 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 51 [2020-10-12 16:27:03,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:27:03,377 INFO L225 Difference]: With dead ends: 137 [2020-10-12 16:27:03,378 INFO L226 Difference]: Without dead ends: 87 [2020-10-12 16:27:03,379 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-10-12 16:27:03,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-12 16:27:03,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 62. [2020-10-12 16:27:03,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-12 16:27:03,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2020-10-12 16:27:03,389 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 51 [2020-10-12 16:27:03,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:27:03,390 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2020-10-12 16:27:03,390 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 16:27:03,390 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2020-10-12 16:27:03,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-12 16:27:03,391 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:27:03,391 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:27:03,391 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 16:27:03,391 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:27:03,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:27:03,392 INFO L82 PathProgramCache]: Analyzing trace with hash -707095316, now seen corresponding path program 9 times [2020-10-12 16:27:03,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:27:03,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1288864182] [2020-10-12 16:27:03,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:27:03,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:27:03,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:05,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:06,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:27:08,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:27:08,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-12 16:27:08,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:27:08,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5346 [2020-10-12 16:27:08,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:27:08,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 16:27:08,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:27:08,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-12 16:27:08,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:27:10,115 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 20 [2020-10-12 16:27:10,255 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 24 [2020-10-12 16:27:10,430 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 26 [2020-10-12 16:27:10,595 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 27 [2020-10-12 16:27:10,755 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 26 [2020-10-12 16:27:10,954 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 28 [2020-10-12 16:27:11,164 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 30 [2020-10-12 16:27:11,361 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 28 [2020-10-12 16:27:11,722 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 51 [2020-10-12 16:27:13,323 WARN L193 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 158 DAG size of output: 81 [2020-10-12 16:27:18,565 WARN L193 SmtUtils]: Spent 5.09 s on a formula simplification. DAG size of input: 183 DAG size of output: 83 [2020-10-12 16:27:55,311 WARN L193 SmtUtils]: Spent 32.48 s on a formula simplification. DAG size of input: 208 DAG size of output: 117 [2020-10-12 16:28:49,675 WARN L193 SmtUtils]: Spent 50.72 s on a formula simplification. DAG size of input: 232 DAG size of output: 113