/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=LOWLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem01_label56.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:40:40,707 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:40:40,711 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:40:40,736 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:40:40,737 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:40:40,738 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:40:40,739 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:40:40,741 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:40:40,742 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:40:40,743 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:40:40,744 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:40:40,745 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:40:40,746 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:40:40,747 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:40:40,748 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:40:40,749 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:40:40,750 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:40:40,751 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:40:40,753 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:40:40,755 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:40:40,756 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:40:40,757 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:40:40,759 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:40:40,760 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:40:40,762 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:40:40,762 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:40:40,763 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:40:40,764 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:40:40,764 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:40:40,765 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:40:40,765 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:40:40,766 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:40:40,767 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:40:40,770 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:40:40,772 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:40:40,772 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:40:40,773 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:40:40,774 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:40:40,774 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:40:40,775 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:40:40,781 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:40:40,782 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 21:40:40,834 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:40:40,835 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:40:40,837 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:40:40,838 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:40:40,838 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:40:40,838 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:40:40,839 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:40:40,839 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:40:40,839 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:40:40,839 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:40:40,840 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:40:40,840 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:40:40,841 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:40:40,841 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:40:40,842 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:40:40,842 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:40:40,842 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:40:40,843 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:40:40,843 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:40:40,843 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:40:40,844 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:40:40,844 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:40:40,844 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:40:40,844 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:40:40,844 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:40:40,845 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:40:40,845 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:40:40,845 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:40:40,845 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:40:40,845 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; [2020-09-24 21:40:41,329 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:40:41,345 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:40:41,349 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:40:41,351 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:40:41,352 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:40:41,353 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label56.c [2020-09-24 21:40:41,418 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4940b9bed/ba3db6665f6249c7a1a1709fd46aba27/FLAG24ddcb0c1 [2020-09-24 21:40:42,063 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:40:42,064 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem01_label56.c [2020-09-24 21:40:42,079 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4940b9bed/ba3db6665f6249c7a1a1709fd46aba27/FLAG24ddcb0c1 [2020-09-24 21:40:42,260 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4940b9bed/ba3db6665f6249c7a1a1709fd46aba27 [2020-09-24 21:40:42,277 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:40:42,284 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:40:42,286 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:40:42,286 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:40:42,291 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:40:42,292 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:40:42" (1/1) ... [2020-09-24 21:40:42,297 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@249e641f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:42, skipping insertion in model container [2020-09-24 21:40:42,297 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:40:42" (1/1) ... [2020-09-24 21:40:42,307 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:40:42,374 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:40:42,877 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:40:42,893 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:40:43,127 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:40:43,150 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:40:43,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:43 WrapperNode [2020-09-24 21:40:43,151 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:40:43,152 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:40:43,152 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:40:43,152 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:40:43,169 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:43" (1/1) ... [2020-09-24 21:40:43,169 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:43" (1/1) ... [2020-09-24 21:40:43,188 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:43" (1/1) ... [2020-09-24 21:40:43,188 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:43" (1/1) ... [2020-09-24 21:40:43,233 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:43" (1/1) ... [2020-09-24 21:40:43,251 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:43" (1/1) ... [2020-09-24 21:40:43,257 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:43" (1/1) ... [2020-09-24 21:40:43,265 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:40:43,269 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:40:43,269 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:40:43,269 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:40:43,271 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:43" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:40:43,355 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:40:43,355 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:40:43,355 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-24 21:40:43,355 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:40:43,355 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-24 21:40:43,355 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:40:43,356 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 21:40:43,356 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 21:40:43,356 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:40:43,356 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:40:43,356 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:40:44,713 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:40:44,713 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 21:40:44,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:40:44 BoogieIcfgContainer [2020-09-24 21:40:44,723 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:40:44,724 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:40:44,724 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:40:44,728 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:40:44,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:40:42" (1/3) ... [2020-09-24 21:40:44,729 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d4144d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:40:44, skipping insertion in model container [2020-09-24 21:40:44,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:43" (2/3) ... [2020-09-24 21:40:44,730 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d4144d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:40:44, skipping insertion in model container [2020-09-24 21:40:44,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:40:44" (3/3) ... [2020-09-24 21:40:44,732 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label56.c [2020-09-24 21:40:44,744 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:40:44,754 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:40:44,776 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:40:44,810 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:40:44,810 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:40:44,811 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:40:44,814 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:40:44,814 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:40:44,814 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:40:44,814 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:40:44,814 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:40:44,845 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states. [2020-09-24 21:40:44,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-09-24 21:40:44,862 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:40:44,864 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:40:44,864 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:40:44,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:40:44,870 INFO L82 PathProgramCache]: Analyzing trace with hash 602782831, now seen corresponding path program 1 times [2020-09-24 21:40:44,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:40:44,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1473995731] [2020-09-24 21:40:44,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:40:45,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:45,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:45,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:46,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:47,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:47,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:48,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:49,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:50,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:50,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-09-24 21:40:50,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 21:40:50,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-09-24 21:40:50,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:50,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 21:40:50,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:40:50,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-09-24 21:40:50,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 21:40:50,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:40:50,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:50,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:51,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:51,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 21:40:51,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:40:51,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 98 [2020-09-24 21:40:51,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:51,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 21:40:51,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:40:51,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 21:40:51,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:40:51,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:40:51,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1473995731] [2020-09-24 21:40:51,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:40:51,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-09-24 21:40:51,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013011868] [2020-09-24 21:40:51,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-24 21:40:51,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:40:51,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-24 21:40:51,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2020-09-24 21:40:51,378 INFO L87 Difference]: Start difference. First operand 525 states. Second operand 18 states. [2020-09-24 21:40:51,993 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-09-24 21:40:52,243 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2020-09-24 21:40:52,603 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2020-09-24 21:40:53,162 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 87 [2020-09-24 21:40:54,191 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 86 [2020-09-24 21:40:54,716 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 84 [2020-09-24 21:40:55,848 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 79 [2020-09-24 21:40:56,978 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 76 [2020-09-24 21:40:59,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:40:59,916 INFO L93 Difference]: Finished difference Result 1700 states and 2421 transitions. [2020-09-24 21:40:59,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-24 21:40:59,919 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 104 [2020-09-24 21:40:59,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:40:59,951 INFO L225 Difference]: With dead ends: 1700 [2020-09-24 21:40:59,952 INFO L226 Difference]: Without dead ends: 1101 [2020-09-24 21:40:59,964 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=348, Invalid=842, Unknown=0, NotChecked=0, Total=1190 [2020-09-24 21:40:59,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2020-09-24 21:41:00,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 985. [2020-09-24 21:41:00,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 985 states. [2020-09-24 21:41:00,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 1147 transitions. [2020-09-24 21:41:00,090 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 1147 transitions. Word has length 104 [2020-09-24 21:41:00,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:41:00,091 INFO L479 AbstractCegarLoop]: Abstraction has 985 states and 1147 transitions. [2020-09-24 21:41:00,091 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-24 21:41:00,091 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 1147 transitions. [2020-09-24 21:41:00,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-09-24 21:41:00,102 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:41:00,102 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:41:00,102 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:41:00,103 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:41:00,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:41:00,103 INFO L82 PathProgramCache]: Analyzing trace with hash 697536410, now seen corresponding path program 1 times [2020-09-24 21:41:00,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:41:00,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1380272723] [2020-09-24 21:41:00,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:41:00,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:00,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:00,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:00,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:01,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:03,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:03,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:04,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:04,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:05,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:05,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-09-24 21:41:05,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 21:41:05,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-09-24 21:41:05,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:05,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-09-24 21:41:05,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 21:41:05,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-09-24 21:41:05,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:41:05,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:41:05,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:05,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:05,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:05,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 21:41:05,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:41:05,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 63 [2020-09-24 21:41:05,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:05,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:41:05,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:41:05,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 21:41:05,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:41:06,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 21:41:06,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:06,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:06,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:06,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:41:06,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:41:06,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-09-24 21:41:06,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:06,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:41:06,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:41:06,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 21:41:06,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:41:06,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-09-24 21:41:06,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:06,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:06,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:06,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:06,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-24 21:41:06,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:41:06,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 224 [2020-09-24 21:41:06,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:06,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:41:06,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:41:06,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 21:41:06,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:41:06,631 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 25 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 21:41:06,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1380272723] [2020-09-24 21:41:06,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:41:06,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-09-24 21:41:06,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372888794] [2020-09-24 21:41:06,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-24 21:41:06,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:41:06,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-24 21:41:06,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2020-09-24 21:41:06,636 INFO L87 Difference]: Start difference. First operand 985 states and 1147 transitions. Second operand 23 states. [2020-09-24 21:41:07,248 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 69 [2020-09-24 21:41:09,665 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 83 [2020-09-24 21:41:09,949 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-09-24 21:41:10,612 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 81 [2020-09-24 21:41:10,937 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 81 [2020-09-24 21:41:11,148 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 79 [2020-09-24 21:41:11,607 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 79 [2020-09-24 21:41:11,841 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 83 [2020-09-24 21:41:12,165 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 91 [2020-09-24 21:41:12,944 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 90 [2020-09-24 21:41:13,833 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 77 [2020-09-24 21:41:14,168 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 89 [2020-09-24 21:41:14,420 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 77 [2020-09-24 21:41:15,070 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 88 [2020-09-24 21:41:15,215 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 74 [2020-09-24 21:41:15,494 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2020-09-24 21:41:15,797 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 87 [2020-09-24 21:41:16,740 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 85 [2020-09-24 21:41:18,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:41:18,455 INFO L93 Difference]: Finished difference Result 3513 states and 4497 transitions. [2020-09-24 21:41:18,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-09-24 21:41:18,457 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 142 [2020-09-24 21:41:18,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:41:18,483 INFO L225 Difference]: With dead ends: 3513 [2020-09-24 21:41:18,484 INFO L226 Difference]: Without dead ends: 2616 [2020-09-24 21:41:18,494 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 837 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=807, Invalid=2499, Unknown=0, NotChecked=0, Total=3306 [2020-09-24 21:41:18,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2616 states. [2020-09-24 21:41:18,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2616 to 2187. [2020-09-24 21:41:18,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2187 states. [2020-09-24 21:41:18,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2187 states to 2187 states and 2651 transitions. [2020-09-24 21:41:18,625 INFO L78 Accepts]: Start accepts. Automaton has 2187 states and 2651 transitions. Word has length 142 [2020-09-24 21:41:18,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:41:18,628 INFO L479 AbstractCegarLoop]: Abstraction has 2187 states and 2651 transitions. [2020-09-24 21:41:18,628 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-24 21:41:18,628 INFO L276 IsEmpty]: Start isEmpty. Operand 2187 states and 2651 transitions. [2020-09-24 21:41:18,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-09-24 21:41:18,640 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:41:18,641 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:41:18,641 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:41:18,642 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:41:18,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:41:18,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1392227032, now seen corresponding path program 1 times [2020-09-24 21:41:18,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:41:18,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [34583483] [2020-09-24 21:41:18,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:41:18,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:18,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:18,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:18,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:19,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:19,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:19,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:20,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:20,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:23,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:23,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-09-24 21:41:23,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 21:41:23,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-09-24 21:41:23,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:23,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 21:41:23,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-24 21:41:23,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-09-24 21:41:23,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 21:41:23,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:41:23,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:23,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:23,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:23,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 21:41:23,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:41:23,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-09-24 21:41:23,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:23,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:41:23,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:41:23,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 21:41:23,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:41:23,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 21:41:23,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:23,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:23,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:23,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:23,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-24 21:41:23,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:41:23,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 67 [2020-09-24 21:41:23,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:23,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:41:23,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:41:23,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 21:41:23,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 21:41:24,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-24 21:41:24,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:24,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:24,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:24,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-24 21:41:24,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:41:24,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-09-24 21:41:24,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:24,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:41:24,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:41:24,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 21:41:24,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:41:24,107 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-24 21:41:24,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [34583483] [2020-09-24 21:41:24,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:41:24,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 21:41:24,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069528119] [2020-09-24 21:41:24,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 21:41:24,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:41:24,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 21:41:24,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-24 21:41:24,113 INFO L87 Difference]: Start difference. First operand 2187 states and 2651 transitions. Second operand 7 states. [2020-09-24 21:41:26,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:41:26,585 INFO L93 Difference]: Finished difference Result 5529 states and 7075 transitions. [2020-09-24 21:41:26,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 21:41:26,585 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 146 [2020-09-24 21:41:26,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:41:26,608 INFO L225 Difference]: With dead ends: 5529 [2020-09-24 21:41:26,608 INFO L226 Difference]: Without dead ends: 3430 [2020-09-24 21:41:26,619 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-09-24 21:41:26,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3430 states. [2020-09-24 21:41:26,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3430 to 3314. [2020-09-24 21:41:26,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3314 states. [2020-09-24 21:41:26,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3314 states to 3314 states and 4084 transitions. [2020-09-24 21:41:26,726 INFO L78 Accepts]: Start accepts. Automaton has 3314 states and 4084 transitions. Word has length 146 [2020-09-24 21:41:26,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:41:26,726 INFO L479 AbstractCegarLoop]: Abstraction has 3314 states and 4084 transitions. [2020-09-24 21:41:26,726 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 21:41:26,727 INFO L276 IsEmpty]: Start isEmpty. Operand 3314 states and 4084 transitions. [2020-09-24 21:41:26,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-09-24 21:41:26,737 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:41:26,737 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:41:26,737 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:41:26,738 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:41:26,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:41:26,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1808917748, now seen corresponding path program 1 times [2020-09-24 21:41:26,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:41:26,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1638668683] [2020-09-24 21:41:26,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:41:26,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:26,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:26,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:27,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:27,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:27,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:28,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:28,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:29,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:29,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:29,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:30,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:31,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:31,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-09-24 21:41:31,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-09-24 21:41:31,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-09-24 21:41:31,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:31,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-24 21:41:31,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:41:31,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-09-24 21:41:31,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:41:31,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:41:31,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:31,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:31,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:31,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 21:41:31,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:41:31,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-09-24 21:41:31,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:31,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:41:31,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:41:31,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-24 21:41:31,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:41:31,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 21:41:31,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:31,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:31,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:32,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:32,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-24 21:41:32,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:41:32,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 63 [2020-09-24 21:41:32,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:32,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:41:32,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:41:32,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 21:41:32,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:41:32,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-24 21:41:32,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:32,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:32,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:32,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 21:41:32,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:41:32,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-09-24 21:41:32,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:32,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:41:32,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:41:32,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-24 21:41:32,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:41:32,227 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 21:41:32,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1638668683] [2020-09-24 21:41:32,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:41:32,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 21:41:32,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657564600] [2020-09-24 21:41:32,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 21:41:32,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:41:32,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 21:41:32,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-09-24 21:41:32,237 INFO L87 Difference]: Start difference. First operand 3314 states and 4084 transitions. Second operand 10 states. [2020-09-24 21:41:32,566 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63