/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=1.0 --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_label11.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 09:00:04,908 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 09:00:04,912 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 09:00:04,957 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 09:00:04,957 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 09:00:04,968 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 09:00:04,970 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 09:00:04,974 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 09:00:04,977 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 09:00:04,981 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 09:00:04,982 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 09:00:04,983 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 09:00:04,983 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 09:00:04,987 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 09:00:04,989 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 09:00:04,991 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 09:00:04,993 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 09:00:04,994 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 09:00:04,995 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 09:00:05,004 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 09:00:05,008 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 09:00:05,009 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 09:00:05,010 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 09:00:05,011 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 09:00:05,014 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 09:00:05,014 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 09:00:05,014 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 09:00:05,017 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 09:00:05,018 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 09:00:05,020 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 09:00:05,020 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 09:00:05,021 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 09:00:05,022 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 09:00:05,023 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 09:00:05,024 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 09:00:05,024 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 09:00:05,025 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 09:00:05,025 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 09:00:05,026 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 09:00:05,027 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 09:00:05,028 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 09:00:05,029 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 09:00:05,078 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 09:00:05,078 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 09:00:05,080 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 09:00:05,081 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 09:00:05,081 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 09:00:05,081 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 09:00:05,081 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 09:00:05,082 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 09:00:05,082 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 09:00:05,082 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 09:00:05,083 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 09:00:05,083 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 09:00:05,084 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 09:00:05,084 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 09:00:05,084 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 09:00:05,085 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 09:00:05,085 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 09:00:05,085 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 09:00:05,085 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 09:00:05,085 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 09:00:05,086 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 09:00:05,086 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 09:00:05,086 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 09:00:05,086 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 09:00:05,087 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 09:00:05,087 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 09:00:05,087 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 09:00:05,087 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 09:00:05,087 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 09:00:05,088 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=1.0;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=1.0;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=1.0;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=1.0;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=1.0;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=1.0;log-additional-information=true; [2020-09-25 09:00:05,547 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 09:00:05,565 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 09:00:05,570 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 09:00:05,572 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 09:00:05,572 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 09:00:05,574 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label11.c [2020-09-25 09:00:05,654 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7c4042706/f1e14845185346308eeb60fde6c8427d/FLAGa3de2bc7a [2020-09-25 09:00:06,321 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 09:00:06,322 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem01_label11.c [2020-09-25 09:00:06,336 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7c4042706/f1e14845185346308eeb60fde6c8427d/FLAGa3de2bc7a [2020-09-25 09:00:06,564 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7c4042706/f1e14845185346308eeb60fde6c8427d [2020-09-25 09:00:06,579 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 09:00:06,586 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 09:00:06,588 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 09:00:06,588 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 09:00:06,593 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 09:00:06,594 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 09:00:06" (1/1) ... [2020-09-25 09:00:06,600 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e8d9ea1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:00:06, skipping insertion in model container [2020-09-25 09:00:06,600 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 09:00:06" (1/1) ... [2020-09-25 09:00:06,610 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 09:00:06,680 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 09:00:07,122 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 09:00:07,138 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 09:00:07,376 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 09:00:07,393 INFO L208 MainTranslator]: Completed translation [2020-09-25 09:00:07,394 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:00:07 WrapperNode [2020-09-25 09:00:07,394 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 09:00:07,395 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 09:00:07,395 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 09:00:07,395 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 09:00:07,409 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:00:07" (1/1) ... [2020-09-25 09:00:07,409 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:00:07" (1/1) ... [2020-09-25 09:00:07,427 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:00:07" (1/1) ... [2020-09-25 09:00:07,428 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:00:07" (1/1) ... [2020-09-25 09:00:07,474 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:00:07" (1/1) ... [2020-09-25 09:00:07,491 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:00:07" (1/1) ... [2020-09-25 09:00:07,496 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:00:07" (1/1) ... [2020-09-25 09:00:07,503 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 09:00:07,503 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 09:00:07,503 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 09:00:07,504 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 09:00:07,505 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:00:07" (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 09:00:07,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 09:00:07,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 09:00:07,589 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-25 09:00:07,590 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 09:00:07,590 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-25 09:00:07,590 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 09:00:07,590 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 09:00:07,590 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-25 09:00:07,591 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 09:00:07,591 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 09:00:07,591 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 09:00:08,895 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 09:00:08,895 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 09:00:08,904 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 09:00:08 BoogieIcfgContainer [2020-09-25 09:00:08,904 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 09:00:08,906 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 09:00:08,906 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 09:00:08,909 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 09:00:08,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 09:00:06" (1/3) ... [2020-09-25 09:00:08,911 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2369b57a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 09:00:08, skipping insertion in model container [2020-09-25 09:00:08,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:00:07" (2/3) ... [2020-09-25 09:00:08,912 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2369b57a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 09:00:08, skipping insertion in model container [2020-09-25 09:00:08,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 09:00:08" (3/3) ... [2020-09-25 09:00:08,914 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label11.c [2020-09-25 09:00:08,925 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 09:00:08,936 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 09:00:08,959 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 09:00:08,994 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 09:00:08,994 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 09:00:08,994 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 09:00:08,994 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 09:00:08,995 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 09:00:08,995 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 09:00:08,995 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 09:00:08,995 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 09:00:09,028 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states. [2020-09-25 09:00:09,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-09-25 09:00:09,049 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:00:09,051 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, 1, 1] [2020-09-25 09:00:09,051 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:00:09,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:00:09,060 INFO L82 PathProgramCache]: Analyzing trace with hash 149723165, now seen corresponding path program 1 times [2020-09-25 09:00:09,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:00:09,073 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [5545876] [2020-09-25 09:00:09,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:00:09,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:00:09,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:09,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:10,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:10,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:10,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:10,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:13,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:14,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:00:14,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-09-25 09:00:14,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 09:00:14,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-25 09:00:14,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:00:14,369 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:00:14,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 09:00:14,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 09:00:14,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 126 [2020-09-25 09:00:14,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 09:00:14,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:00:14,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:00:14,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:14,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:00:14,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 09:00:14,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:00:14,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-09-25 09:00:14,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:00:14,607 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:00:14,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:00:14,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:00:14,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-25 09:00:14,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:00:14,654 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 09:00:14,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [5545876] [2020-09-25 09:00:14,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 09:00:14,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 09:00:14,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82457619] [2020-09-25 09:00:14,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 09:00:14,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:00:14,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 09:00:14,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 09:00:14,686 INFO L87 Difference]: Start difference. First operand 525 states. Second operand 4 states. [2020-09-25 09:00:16,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:00:16,732 INFO L93 Difference]: Finished difference Result 1340 states and 1738 transitions. [2020-09-25 09:00:16,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 09:00:16,737 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 137 [2020-09-25 09:00:16,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:00:16,762 INFO L225 Difference]: With dead ends: 1340 [2020-09-25 09:00:16,762 INFO L226 Difference]: Without dead ends: 741 [2020-09-25 09:00:16,771 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 09:00:16,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2020-09-25 09:00:16,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 664. [2020-09-25 09:00:16,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 664 states. [2020-09-25 09:00:16,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 780 transitions. [2020-09-25 09:00:16,875 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 780 transitions. Word has length 137 [2020-09-25 09:00:16,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:00:16,876 INFO L479 AbstractCegarLoop]: Abstraction has 664 states and 780 transitions. [2020-09-25 09:00:16,876 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 09:00:16,876 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 780 transitions. [2020-09-25 09:00:16,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-09-25 09:00:16,882 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:00:16,883 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:00:16,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 09:00:16,883 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:00:16,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:00:16,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1946630892, now seen corresponding path program 1 times [2020-09-25 09:00:16,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:00:16,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1941077665] [2020-09-25 09:00:16,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:00:16,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:00:16,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:17,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:17,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:17,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:17,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:18,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:21,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:21,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:21,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:21,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:21,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:00:21,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-09-25 09:00:21,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 09:00:21,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-09-25 09:00:21,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:00:21,929 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:00:21,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 09:00:21,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-09-25 09:00:21,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-09-25 09:00:21,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:00:22,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:00:22,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:00:22,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:22,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:00:22,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 09:00:22,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:00:22,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 09:00:22,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:00:22,115 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:00:22,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:00:22,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:00:22,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:00:22,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:00:22,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 09:00:22,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:00:22,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:22,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:00:22,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-25 09:00:22,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:00:22,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-09-25 09:00:22,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:00:22,170 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:00:22,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:00:22,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:00:22,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 09:00:22,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:00:22,208 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 09:00:22,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1941077665] [2020-09-25 09:00:22,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:00:22,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 09:00:22,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996263996] [2020-09-25 09:00:22,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 09:00:22,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:00:22,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 09:00:22,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 09:00:22,213 INFO L87 Difference]: Start difference. First operand 664 states and 780 transitions. Second operand 5 states. [2020-09-25 09:00:24,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:00:24,247 INFO L93 Difference]: Finished difference Result 1623 states and 1990 transitions. [2020-09-25 09:00:24,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 09:00:24,248 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 158 [2020-09-25 09:00:24,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:00:24,255 INFO L225 Difference]: With dead ends: 1623 [2020-09-25 09:00:24,255 INFO L226 Difference]: Without dead ends: 983 [2020-09-25 09:00:24,259 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 09:00:24,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2020-09-25 09:00:24,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 950. [2020-09-25 09:00:24,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 950 states. [2020-09-25 09:00:24,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 950 states to 950 states and 1106 transitions. [2020-09-25 09:00:24,309 INFO L78 Accepts]: Start accepts. Automaton has 950 states and 1106 transitions. Word has length 158 [2020-09-25 09:00:24,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:00:24,309 INFO L479 AbstractCegarLoop]: Abstraction has 950 states and 1106 transitions. [2020-09-25 09:00:24,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 09:00:24,310 INFO L276 IsEmpty]: Start isEmpty. Operand 950 states and 1106 transitions. [2020-09-25 09:00:24,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2020-09-25 09:00:24,314 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:00:24,314 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:00:24,314 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 09:00:24,315 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:00:24,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:00:24,315 INFO L82 PathProgramCache]: Analyzing trace with hash 2046884882, now seen corresponding path program 1 times [2020-09-25 09:00:24,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:00:24,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1556292206] [2020-09-25 09:00:24,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:00:24,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:00:24,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:24,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:24,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:24,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:25,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:25,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:25,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:25,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:26,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:28,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:28,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:29,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:00:29,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 195 [2020-09-25 09:00:29,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-09-25 09:00:29,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-09-25 09:00:29,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:00:29,377 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:00:29,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 09:00:29,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 68 [2020-09-25 09:00:29,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 126 [2020-09-25 09:00:29,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:00:29,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:00:29,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:00:29,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:29,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:00:29,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 09:00:29,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:00:29,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-25 09:00:29,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:00:29,526 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:00:29,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:00:29,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:00:29,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:00:29,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:00:29,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 09:00:29,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:00:29,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:29,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:00:29,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-09-25 09:00:29,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:00:29,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-09-25 09:00:29,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:00:29,627 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:00:29,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:00:29,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:00:29,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-25 09:00:29,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:00:29,715 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 09:00:29,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1556292206] [2020-09-25 09:00:29,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:00:29,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 09:00:29,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474078163] [2020-09-25 09:00:29,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 09:00:29,718 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:00:29,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 09:00:29,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 09:00:29,719 INFO L87 Difference]: Start difference. First operand 950 states and 1106 transitions. Second operand 5 states. [2020-09-25 09:00:31,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:00:31,927 INFO L93 Difference]: Finished difference Result 2603 states and 3111 transitions. [2020-09-25 09:00:31,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 09:00:31,928 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 184 [2020-09-25 09:00:31,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:00:31,938 INFO L225 Difference]: With dead ends: 2603 [2020-09-25 09:00:31,938 INFO L226 Difference]: Without dead ends: 1677 [2020-09-25 09:00:31,941 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 09:00:31,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1677 states. [2020-09-25 09:00:31,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1677 to 1396. [2020-09-25 09:00:31,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1396 states. [2020-09-25 09:00:31,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1396 states to 1396 states and 1663 transitions. [2020-09-25 09:00:31,986 INFO L78 Accepts]: Start accepts. Automaton has 1396 states and 1663 transitions. Word has length 184 [2020-09-25 09:00:31,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:00:31,987 INFO L479 AbstractCegarLoop]: Abstraction has 1396 states and 1663 transitions. [2020-09-25 09:00:31,987 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 09:00:31,987 INFO L276 IsEmpty]: Start isEmpty. Operand 1396 states and 1663 transitions. [2020-09-25 09:00:31,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-09-25 09:00:31,995 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:00:31,995 INFO L422 BasicCegarLoop]: trace histogram [3, 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, 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] [2020-09-25 09:00:31,996 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 09:00:31,996 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:00:31,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:00:31,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1660987567, now seen corresponding path program 1 times [2020-09-25 09:00:31,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:00:31,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [823696263] [2020-09-25 09:00:31,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:00:32,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:00:32,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:32,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:32,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:32,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:32,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:32,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:33,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:33,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:37,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:00:37,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 222 [2020-09-25 09:00:37,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 09:00:37,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-09-25 09:00:37,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:00:37,046 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:00:37,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 09:00:37,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-25 09:00:37,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-09-25 09:00:37,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:00:37,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:00:37,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:00:37,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:37,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:00:37,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 09:00:37,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:00:37,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-09-25 09:00:37,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:00:37,178 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:00:37,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 09:00:37,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:00:37,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-25 09:00:37,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:00:37,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 09:00:37,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:00:37,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:37,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:00:37,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-09-25 09:00:37,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:00:37,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 146 [2020-09-25 09:00:37,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:00:37,384 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:00:37,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 09:00:37,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 09:00:37,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-09-25 09:00:37,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:00:37,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-09-25 09:00:37,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:00:37,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:37,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:00:37,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-25 09:00:37,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:00:37,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-09-25 09:00:37,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:00:37,530 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:00:37,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:00:37,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-25 09:00:37,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:00:37,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:00:37,657 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 52 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-25 09:00:37,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [823696263] [2020-09-25 09:00:37,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:00:37,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 09:00:37,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909847973] [2020-09-25 09:00:37,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 09:00:37,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:00:37,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 09:00:37,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-09-25 09:00:37,663 INFO L87 Difference]: Start difference. First operand 1396 states and 1663 transitions. Second operand 8 states. [2020-09-25 09:00:40,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:00:40,856 INFO L93 Difference]: Finished difference Result 3616 states and 4364 transitions. [2020-09-25 09:00:40,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-25 09:00:40,856 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 209 [2020-09-25 09:00:40,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:00:40,868 INFO L225 Difference]: With dead ends: 3616 [2020-09-25 09:00:40,868 INFO L226 Difference]: Without dead ends: 1888 [2020-09-25 09:00:40,875 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2020-09-25 09:00:40,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1888 states. [2020-09-25 09:00:40,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1888 to 1803. [2020-09-25 09:00:40,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1803 states. [2020-09-25 09:00:40,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1803 states to 1803 states and 2049 transitions. [2020-09-25 09:00:40,944 INFO L78 Accepts]: Start accepts. Automaton has 1803 states and 2049 transitions. Word has length 209 [2020-09-25 09:00:40,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:00:40,945 INFO L479 AbstractCegarLoop]: Abstraction has 1803 states and 2049 transitions. [2020-09-25 09:00:40,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 09:00:40,945 INFO L276 IsEmpty]: Start isEmpty. Operand 1803 states and 2049 transitions. [2020-09-25 09:00:40,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2020-09-25 09:00:40,953 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:00:40,954 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, 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] [2020-09-25 09:00:40,954 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 09:00:40,954 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:00:40,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:00:40,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1584133511, now seen corresponding path program 1 times [2020-09-25 09:00:40,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:00:40,955 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1250521645] [2020-09-25 09:00:40,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:00:40,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:00:40,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:41,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:41,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:41,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:41,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:42,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:43,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:43,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:43,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:43,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:43,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:45,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:45,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:46,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:00:46,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 245 [2020-09-25 09:00:46,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-09-25 09:00:46,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5158 [2020-09-25 09:00:46,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:00:46,137 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:00:46,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 09:00:46,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-25 09:00:46,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-09-25 09:00:46,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:00:46,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:00:46,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:00:46,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:46,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:00:46,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 09:00:46,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:00:46,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-09-25 09:00:46,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:00:46,251 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:00:46,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:00:46,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:00:46,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-25 09:00:46,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:00:46,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 09:00:46,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:00:46,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:46,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:46,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:00:46,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-25 09:00:46,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 09:00:46,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-09-25 09:00:46,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:00:46,331 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:00:46,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 09:00:46,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 09:00:46,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 09:00:46,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:00:46,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-25 09:00:46,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:00:46,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:46,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:00:46,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-09-25 09:00:46,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:00:46,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 106 [2020-09-25 09:00:46,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:00:46,475 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:00:46,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 09:00:46,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 09:00:46,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-09-25 09:00:46,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:00:46,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-09-25 09:00:46,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:00:46,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:46,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:00:46,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-25 09:00:46,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:00:46,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-25 09:00:46,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:00:46,539 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:00:46,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:00:46,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-25 09:00:46,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:00:46,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:00:46,602 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 79 proven. 21 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-09-25 09:00:46,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1250521645] [2020-09-25 09:00:46,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:00:46,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 09:00:46,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20812879] [2020-09-25 09:00:46,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 09:00:46,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:00:46,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 09:00:46,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-25 09:00:46,605 INFO L87 Difference]: Start difference. First operand 1803 states and 2049 transitions. Second operand 8 states. [2020-09-25 09:00:48,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:00:48,926 INFO L93 Difference]: Finished difference Result 4737 states and 5555 transitions. [2020-09-25 09:00:48,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-25 09:00:48,927 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 230 [2020-09-25 09:00:48,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:00:48,944 INFO L225 Difference]: With dead ends: 4737 [2020-09-25 09:00:48,944 INFO L226 Difference]: Without dead ends: 2958 [2020-09-25 09:00:48,950 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-09-25 09:00:48,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2958 states. [2020-09-25 09:00:49,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2958 to 2858. [2020-09-25 09:00:49,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2858 states. [2020-09-25 09:00:49,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2858 states to 2858 states and 3278 transitions. [2020-09-25 09:00:49,050 INFO L78 Accepts]: Start accepts. Automaton has 2858 states and 3278 transitions. Word has length 230 [2020-09-25 09:00:49,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:00:49,050 INFO L479 AbstractCegarLoop]: Abstraction has 2858 states and 3278 transitions. [2020-09-25 09:00:49,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 09:00:49,051 INFO L276 IsEmpty]: Start isEmpty. Operand 2858 states and 3278 transitions. [2020-09-25 09:00:49,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2020-09-25 09:00:49,063 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:00:49,063 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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, 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] [2020-09-25 09:00:49,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 09:00:49,064 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:00:49,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:00:49,064 INFO L82 PathProgramCache]: Analyzing trace with hash -94200174, now seen corresponding path program 1 times [2020-09-25 09:00:49,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:00:49,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [452343804] [2020-09-25 09:00:49,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:00:49,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:00:49,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:49,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:49,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:49,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:49,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:50,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:50,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:52,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:54,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:00:54,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 263 [2020-09-25 09:00:54,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 09:00:54,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-25 09:00:54,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:00:54,105 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:00:54,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 09:00:54,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-09-25 09:00:54,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-09-25 09:00:54,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:00:54,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:00:54,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:00:54,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:54,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:00:54,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 09:00:54,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:00:54,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-25 09:00:54,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:00:54,203 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:00:54,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:00:54,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:00:54,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:00:54,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:00:54,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 09:00:54,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:00:54,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:54,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:00:54,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 09:00:54,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:00:54,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-09-25 09:00:54,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:00:54,265 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:00:54,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 09:00:54,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:00:54,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 09:00:54,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:00:54,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-09-25 09:00:54,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:00:54,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:54,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:00:54,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-09-25 09:00:54,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:00:54,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 84 [2020-09-25 09:00:54,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:00:54,376 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:00:54,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 09:00:54,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 09:00:54,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-09-25 09:00:54,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:00:54,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-09-25 09:00:54,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:00:54,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:54,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:00:54,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-25 09:00:54,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:00:54,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-09-25 09:00:54,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:00:54,448 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:00:54,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:00:54,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-25 09:00:54,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:00:54,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:00:54,514 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 114 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-09-25 09:00:54,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [452343804] [2020-09-25 09:00:54,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:00:54,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 09:00:54,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487501645] [2020-09-25 09:00:54,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 09:00:54,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:00:54,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 09:00:54,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-25 09:00:54,517 INFO L87 Difference]: Start difference. First operand 2858 states and 3278 transitions. Second operand 8 states.