/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.2 --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/Problem02_label32.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 04:27:56,682 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 04:27:56,685 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 04:27:56,730 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 04:27:56,730 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 04:27:56,739 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 04:27:56,741 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 04:27:56,745 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 04:27:56,748 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 04:27:56,751 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 04:27:56,753 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 04:27:56,754 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 04:27:56,754 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 04:27:56,757 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 04:27:56,761 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 04:27:56,764 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 04:27:56,765 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 04:27:56,767 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 04:27:56,768 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 04:27:56,778 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 04:27:56,780 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 04:27:56,781 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 04:27:56,783 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 04:27:56,784 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 04:27:56,802 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 04:27:56,802 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 04:27:56,803 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 04:27:56,804 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 04:27:56,804 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 04:27:56,809 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 04:27:56,809 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 04:27:56,810 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 04:27:56,811 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 04:27:56,814 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 04:27:56,816 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 04:27:56,817 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 04:27:56,818 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 04:27:56,818 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 04:27:56,818 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 04:27:56,820 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 04:27:56,821 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 04:27:56,822 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 04:27:56,869 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 04:27:56,869 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 04:27:56,871 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 04:27:56,872 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 04:27:56,872 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 04:27:56,872 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 04:27:56,873 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 04:27:56,873 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 04:27:56,873 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 04:27:56,873 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 04:27:56,874 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 04:27:56,875 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 04:27:56,875 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 04:27:56,875 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 04:27:56,876 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 04:27:56,876 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 04:27:56,876 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 04:27:56,876 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 04:27:56,876 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 04:27:56,877 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 04:27:56,877 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 04:27:56,877 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 04:27:56,877 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 04:27:56,877 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 04:27:56,878 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 04:27:56,878 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 04:27:56,878 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 04:27:56,878 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 04:27:56,878 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 04:27:56,879 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=WIDESTAMONGSMALL;tolerance=0.2;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=WIDESTAMONGSMALL;tolerance=0.2;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=WIDESTAMONGSMALL;tolerance=0.2;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=WIDESTAMONGSMALL;tolerance=0.2;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=WIDESTAMONGSMALL;tolerance=0.2;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=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; [2020-09-25 04:27:57,366 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 04:27:57,395 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 04:27:57,400 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 04:27:57,402 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 04:27:57,402 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 04:27:57,404 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label32.c [2020-09-25 04:27:57,499 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f874dcb73/b0ad6a2627be4f6fa9a2418716af6bf5/FLAG5b7c5e609 [2020-09-25 04:27:58,211 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 04:27:58,212 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem02_label32.c [2020-09-25 04:27:58,228 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f874dcb73/b0ad6a2627be4f6fa9a2418716af6bf5/FLAG5b7c5e609 [2020-09-25 04:27:58,413 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f874dcb73/b0ad6a2627be4f6fa9a2418716af6bf5 [2020-09-25 04:27:58,432 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 04:27:58,438 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 04:27:58,442 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 04:27:58,442 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 04:27:58,447 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 04:27:58,448 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 04:27:58" (1/1) ... [2020-09-25 04:27:58,454 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 25.09 04:27:58, skipping insertion in model container [2020-09-25 04:27:58,454 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 04:27:58" (1/1) ... [2020-09-25 04:27:58,467 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 04:27:58,534 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 04:27:58,969 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 04:27:58,975 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 04:27:59,180 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 04:27:59,205 INFO L208 MainTranslator]: Completed translation [2020-09-25 04:27:59,206 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:27:59 WrapperNode [2020-09-25 04:27:59,206 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 04:27:59,207 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 04:27:59,207 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 04:27:59,207 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 04:27:59,227 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:27:59" (1/1) ... [2020-09-25 04:27:59,227 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:27:59" (1/1) ... [2020-09-25 04:27:59,249 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:27:59" (1/1) ... [2020-09-25 04:27:59,249 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:27:59" (1/1) ... [2020-09-25 04:27:59,294 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:27:59" (1/1) ... [2020-09-25 04:27:59,327 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:27:59" (1/1) ... [2020-09-25 04:27:59,336 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:27:59" (1/1) ... [2020-09-25 04:27:59,348 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 04:27:59,348 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 04:27:59,348 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 04:27:59,349 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 04:27:59,350 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:27:59" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 04:27:59,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 04:27:59,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 04:27:59,434 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-25 04:27:59,434 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 04:27:59,435 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-25 04:27:59,435 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 04:27:59,435 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 04:27:59,435 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-25 04:27:59,435 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 04:27:59,436 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 04:27:59,436 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 04:28:00,899 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 04:28:00,900 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 04:28:00,909 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 04:28:00 BoogieIcfgContainer [2020-09-25 04:28:00,909 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 04:28:00,911 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 04:28:00,911 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 04:28:00,915 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 04:28:00,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 04:27:58" (1/3) ... [2020-09-25 04:28:00,917 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6865ff13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 04:28:00, skipping insertion in model container [2020-09-25 04:28:00,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:27:59" (2/3) ... [2020-09-25 04:28:00,918 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6865ff13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 04:28:00, skipping insertion in model container [2020-09-25 04:28:00,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 04:28:00" (3/3) ... [2020-09-25 04:28:00,921 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label32.c [2020-09-25 04:28:00,936 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 04:28:00,949 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 04:28:00,976 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 04:28:01,016 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 04:28:01,016 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 04:28:01,017 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 04:28:01,017 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 04:28:01,017 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 04:28:01,017 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 04:28:01,017 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 04:28:01,017 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 04:28:01,055 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states. [2020-09-25 04:28:01,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-09-25 04:28:01,076 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:28:01,077 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 04:28:01,078 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:28:01,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:28:01,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1568421906, now seen corresponding path program 1 times [2020-09-25 04:28:01,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:28:01,100 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [286997687] [2020-09-25 04:28:01,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:28:01,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:28:01,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:28:01,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:28:02,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:28:02,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:28:04,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:28:04,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:28:04,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:28:04,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:28:05,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:28:06,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:28:06,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-09-25 04:28:06,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 04:28:06,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-09-25 04:28:06,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:28:06,393 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:28:06,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 04:28:06,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 04:28:06,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-09-25 04:28:06,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 04:28:06,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:28:06,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:28:06,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:28:06,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:28:06,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 04:28:06,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:28:06,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-09-25 04:28:06,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:28:06,640 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:28:06,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 04:28:06,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:28:06,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-25 04:28:06,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:28:06,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 04:28:06,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [286997687] [2020-09-25 04:28:06,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 04:28:06,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 04:28:06,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044640275] [2020-09-25 04:28:06,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 04:28:06,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:28:06,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 04:28:06,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 04:28:06,753 INFO L87 Difference]: Start difference. First operand 527 states. Second operand 4 states. [2020-09-25 04:28:09,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:28:09,116 INFO L93 Difference]: Finished difference Result 1247 states and 1695 transitions. [2020-09-25 04:28:09,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 04:28:09,118 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 135 [2020-09-25 04:28:09,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:28:09,143 INFO L225 Difference]: With dead ends: 1247 [2020-09-25 04:28:09,144 INFO L226 Difference]: Without dead ends: 669 [2020-09-25 04:28:09,156 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-25 04:28:09,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2020-09-25 04:28:09,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 621. [2020-09-25 04:28:09,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 621 states. [2020-09-25 04:28:09,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 723 transitions. [2020-09-25 04:28:09,263 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 723 transitions. Word has length 135 [2020-09-25 04:28:09,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:28:09,265 INFO L479 AbstractCegarLoop]: Abstraction has 621 states and 723 transitions. [2020-09-25 04:28:09,265 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 04:28:09,265 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 723 transitions. [2020-09-25 04:28:09,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-09-25 04:28:09,271 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:28:09,272 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 04:28:09,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 04:28:09,273 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:28:09,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:28:09,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1119247929, now seen corresponding path program 1 times [2020-09-25 04:28:09,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:28:09,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1379651253] [2020-09-25 04:28:09,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:28:09,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:28:09,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:28:09,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:28:09,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:28:10,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:28:11,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:28:13,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:28:13,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:28:13,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:28:14,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:28:14,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-09-25 04:28:14,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 04:28:14,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-09-25 04:28:14,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:28:14,362 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:28:14,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 04:28:14,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-09-25 04:28:14,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-09-25 04:28:14,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:28:14,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:28:14,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:28:14,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:28:14,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:28:14,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 04:28:14,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:28:14,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-25 04:28:14,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:28:14,570 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:28:14,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:28:14,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:28:14,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:28:14,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:28:14,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 04:28:14,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:28:14,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:28:14,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:28:14,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 04:28:14,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:28:14,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-25 04:28:14,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:28:14,615 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:28:14,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 04:28:14,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:28:14,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-25 04:28:14,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:28:14,688 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 04:28:14,689 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1379651253] [2020-09-25 04:28:14,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 04:28:14,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 04:28:14,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361570380] [2020-09-25 04:28:14,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 04:28:14,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:28:14,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 04:28:14,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 04:28:14,693 INFO L87 Difference]: Start difference. First operand 621 states and 723 transitions. Second operand 5 states. [2020-09-25 04:28:16,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:28:16,381 INFO L93 Difference]: Finished difference Result 1533 states and 1847 transitions. [2020-09-25 04:28:16,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 04:28:16,382 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 152 [2020-09-25 04:28:16,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:28:16,396 INFO L225 Difference]: With dead ends: 1533 [2020-09-25 04:28:16,396 INFO L226 Difference]: Without dead ends: 934 [2020-09-25 04:28:16,399 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-25 04:28:16,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 934 states. [2020-09-25 04:28:16,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 934 to 924. [2020-09-25 04:28:16,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 924 states. [2020-09-25 04:28:16,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 1105 transitions. [2020-09-25 04:28:16,465 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 1105 transitions. Word has length 152 [2020-09-25 04:28:16,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:28:16,467 INFO L479 AbstractCegarLoop]: Abstraction has 924 states and 1105 transitions. [2020-09-25 04:28:16,467 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 04:28:16,467 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 1105 transitions. [2020-09-25 04:28:16,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-09-25 04:28:16,477 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:28:16,477 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 04:28:16,477 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 04:28:16,478 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:28:16,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:28:16,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1353322846, now seen corresponding path program 1 times [2020-09-25 04:28:16,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:28:16,479 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1503235563] [2020-09-25 04:28:16,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:28:16,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:28:16,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:28:16,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:28:16,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:28:17,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:28:17,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:28:17,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:28:21,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:28:21,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 199 [2020-09-25 04:28:21,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 04:28:21,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-09-25 04:28:21,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:28:21,602 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:28:21,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 04:28:21,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-09-25 04:28:21,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-09-25 04:28:21,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:28:21,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:28:21,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:28:21,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:28:21,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:28:21,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 04:28:21,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:28:21,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 04:28:21,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:28:21,695 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:28:21,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:28:21,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:28:21,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:28:21,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:28:21,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 04:28:21,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:28:21,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:28:21,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:28:21,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 04:28:21,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:28:21,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-25 04:28:21,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:28:21,733 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:28:21,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 04:28:21,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:28:21,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-25 04:28:21,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:28:21,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-25 04:28:21,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:28:21,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:28:21,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:28:21,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-25 04:28:21,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:28:21,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-09-25 04:28:21,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:28:21,814 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:28:21,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 04:28:21,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 04:28:21,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-09-25 04:28:21,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 04:28:21,924 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 45 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 04:28:21,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1503235563] [2020-09-25 04:28:21,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 04:28:21,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 04:28:21,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039004771] [2020-09-25 04:28:21,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 04:28:21,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:28:21,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 04:28:21,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-09-25 04:28:21,928 INFO L87 Difference]: Start difference. First operand 924 states and 1105 transitions. Second operand 7 states. [2020-09-25 04:28:24,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:28:24,426 INFO L93 Difference]: Finished difference Result 2391 states and 2955 transitions. [2020-09-25 04:28:24,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 04:28:24,427 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 186 [2020-09-25 04:28:24,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:28:24,435 INFO L225 Difference]: With dead ends: 2391 [2020-09-25 04:28:24,435 INFO L226 Difference]: Without dead ends: 1489 [2020-09-25 04:28:24,439 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-09-25 04:28:24,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1489 states. [2020-09-25 04:28:24,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1489 to 1241. [2020-09-25 04:28:24,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1241 states. [2020-09-25 04:28:24,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1241 states to 1241 states and 1552 transitions. [2020-09-25 04:28:24,494 INFO L78 Accepts]: Start accepts. Automaton has 1241 states and 1552 transitions. Word has length 186 [2020-09-25 04:28:24,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:28:24,494 INFO L479 AbstractCegarLoop]: Abstraction has 1241 states and 1552 transitions. [2020-09-25 04:28:24,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 04:28:24,494 INFO L276 IsEmpty]: Start isEmpty. Operand 1241 states and 1552 transitions. [2020-09-25 04:28:24,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-09-25 04:28:24,500 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:28:24,501 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 04:28:24,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 04:28:24,501 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:28:24,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:28:24,503 INFO L82 PathProgramCache]: Analyzing trace with hash 853921109, now seen corresponding path program 1 times [2020-09-25 04:28:24,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:28:24,504 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [612894989] [2020-09-25 04:28:24,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:28:24,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:28:24,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:28:24,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:28:24,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:28:25,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:28:25,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:28:29,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:28:29,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 204 [2020-09-25 04:28:29,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 04:28:29,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4573 [2020-09-25 04:28:29,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:28:29,121 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:28:29,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 04:28:29,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 80 [2020-09-25 04:28:29,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 123 [2020-09-25 04:28:29,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:28:29,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:28:29,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:28:29,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:28:29,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:28:29,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 04:28:29,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:28:29,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-25 04:28:29,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:28:29,233 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:28:29,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:28:29,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:28:29,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:28:29,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:28:29,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 04:28:29,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:28:29,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:28:29,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:28:29,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-25 04:28:29,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:28:29,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 04:28:29,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:28:29,266 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:28:29,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:28:29,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:28:29,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:28:29,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:28:29,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-09-25 04:28:29,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:28:29,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:28:29,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:28:29,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-25 04:28:29,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:28:29,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 67 [2020-09-25 04:28:29,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:28:29,344 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:28:29,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 04:28:29,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:28:29,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-25 04:28:29,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:28:29,396 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-09-25 04:28:29,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [612894989] [2020-09-25 04:28:29,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 04:28:29,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 04:28:29,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714000012] [2020-09-25 04:28:29,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 04:28:29,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:28:29,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 04:28:29,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 04:28:29,402 INFO L87 Difference]: Start difference. First operand 1241 states and 1552 transitions. Second operand 5 states. [2020-09-25 04:28:31,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:28:31,144 INFO L93 Difference]: Finished difference Result 3226 states and 4186 transitions. [2020-09-25 04:28:31,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 04:28:31,145 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 191 [2020-09-25 04:28:31,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:28:31,154 INFO L225 Difference]: With dead ends: 3226 [2020-09-25 04:28:31,154 INFO L226 Difference]: Without dead ends: 1481 [2020-09-25 04:28:31,161 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-25 04:28:31,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1481 states. [2020-09-25 04:28:31,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1481 to 1470. [2020-09-25 04:28:31,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1470 states. [2020-09-25 04:28:31,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1470 states to 1470 states and 1759 transitions. [2020-09-25 04:28:31,202 INFO L78 Accepts]: Start accepts. Automaton has 1470 states and 1759 transitions. Word has length 191 [2020-09-25 04:28:31,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:28:31,203 INFO L479 AbstractCegarLoop]: Abstraction has 1470 states and 1759 transitions. [2020-09-25 04:28:31,203 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 04:28:31,203 INFO L276 IsEmpty]: Start isEmpty. Operand 1470 states and 1759 transitions. [2020-09-25 04:28:31,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-09-25 04:28:31,210 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:28:31,210 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 04:28:31,210 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 04:28:31,210 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:28:31,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:28:31,211 INFO L82 PathProgramCache]: Analyzing trace with hash 867866385, now seen corresponding path program 1 times [2020-09-25 04:28:31,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:28:31,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [24750178] [2020-09-25 04:28:31,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:28:31,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:28:31,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:28:31,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:28:32,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:28:32,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:28:32,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:28:33,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:28:34,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:28:35,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:28:35,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:28:36,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:28:36,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 212 [2020-09-25 04:28:36,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 04:28:36,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-09-25 04:28:36,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:28:36,264 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:28:36,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 04:28:36,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 86 [2020-09-25 04:28:36,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-09-25 04:28:36,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 04:28:36,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:28:36,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:28:36,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:28:36,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:28:36,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 04:28:36,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:28:36,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 04:28:36,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:28:36,563 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:28:36,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:28:36,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:28:36,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:28:36,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:28:36,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 04:28:36,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:28:36,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:28:36,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:28:36,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-25 04:28:36,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:28:36,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-09-25 04:28:36,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:28:36,618 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:28:36,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:28:36,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:28:36,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:28:36,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:28:36,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-09-25 04:28:36,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:28:36,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:28:36,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:28:36,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-25 04:28:36,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:28:36,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-09-25 04:28:36,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:28:36,672 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:28:36,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 04:28:36,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:28:36,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-25 04:28:36,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:28:36,831 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 46 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-09-25 04:28:36,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [24750178] [2020-09-25 04:28:36,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 04:28:36,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 04:28:36,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250363445] [2020-09-25 04:28:36,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 04:28:36,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:28:36,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 04:28:36,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 04:28:36,835 INFO L87 Difference]: Start difference. First operand 1470 states and 1759 transitions. Second operand 5 states. [2020-09-25 04:28:38,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:28:38,612 INFO L93 Difference]: Finished difference Result 3682 states and 4523 transitions. [2020-09-25 04:28:38,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 04:28:38,614 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 199 [2020-09-25 04:28:38,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:28:38,626 INFO L225 Difference]: With dead ends: 3682 [2020-09-25 04:28:38,626 INFO L226 Difference]: Without dead ends: 2234 [2020-09-25 04:28:38,632 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-25 04:28:38,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2234 states. [2020-09-25 04:28:38,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2234 to 2069. [2020-09-25 04:28:38,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2069 states. [2020-09-25 04:28:38,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2069 states to 2069 states and 2473 transitions. [2020-09-25 04:28:38,692 INFO L78 Accepts]: Start accepts. Automaton has 2069 states and 2473 transitions. Word has length 199 [2020-09-25 04:28:38,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:28:38,693 INFO L479 AbstractCegarLoop]: Abstraction has 2069 states and 2473 transitions. [2020-09-25 04:28:38,693 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 04:28:38,693 INFO L276 IsEmpty]: Start isEmpty. Operand 2069 states and 2473 transitions. [2020-09-25 04:28:38,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2020-09-25 04:28:38,702 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:28:38,703 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-09-25 04:28:38,703 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 04:28:38,703 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:28:38,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:28:38,704 INFO L82 PathProgramCache]: Analyzing trace with hash 60157500, now seen corresponding path program 1 times [2020-09-25 04:28:38,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:28:38,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1577239072] [2020-09-25 04:28:38,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:28:38,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:28:38,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:28:38,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:28:39,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:28:39,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:28:39,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:28:40,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:28:40,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:28:40,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:28:40,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:28:43,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:28:43,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 275 [2020-09-25 04:28:43,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 04:28:43,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-25 04:28:43,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:28:43,762 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:28:43,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 04:28:43,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 152 [2020-09-25 04:28:43,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-09-25 04:28:43,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:28:43,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:28:43,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:28:43,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:28:43,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:28:43,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 04:28:43,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:28:43,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 04:28:43,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:28:43,905 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:28:43,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:28:43,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:28:43,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:28:43,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 04:28:43,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 04:28:43,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:28:43,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:28:43,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:28:43,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-25 04:28:43,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:28:43,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 04:28:43,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:28:43,936 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:28:43,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:28:43,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:28:43,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:28:43,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:28:43,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-09-25 04:28:43,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:28:43,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:28:43,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:28:43,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-25 04:28:43,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:28:43,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-25 04:28:43,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:28:43,955 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:28:43,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:28:43,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:28:43,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:28:43,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 04:28:43,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-09-25 04:28:43,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:28:43,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:28:44,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:28:44,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-09-25 04:28:44,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:28:44,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 63 [2020-09-25 04:28:44,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:28:44,037 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:28:44,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 04:28:44,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:28:44,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-09-25 04:28:44,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 04:28:44,120 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 101 proven. 3 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-09-25 04:28:44,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1577239072] [2020-09-25 04:28:44,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 04:28:44,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 04:28:44,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969159173] [2020-09-25 04:28:44,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 04:28:44,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:28:44,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 04:28:44,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 04:28:44,123 INFO L87 Difference]: Start difference. First operand 2069 states and 2473 transitions. Second operand 5 states.