/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=0.4 --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 05:36:22,201 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 05:36:22,205 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 05:36:22,231 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 05:36:22,231 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 05:36:22,232 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 05:36:22,234 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 05:36:22,236 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 05:36:22,238 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 05:36:22,239 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 05:36:22,240 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 05:36:22,241 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 05:36:22,241 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 05:36:22,242 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 05:36:22,244 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 05:36:22,245 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 05:36:22,246 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 05:36:22,247 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 05:36:22,249 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 05:36:22,251 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 05:36:22,253 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 05:36:22,254 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 05:36:22,255 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 05:36:22,256 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 05:36:22,259 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 05:36:22,259 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 05:36:22,259 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 05:36:22,260 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 05:36:22,261 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 05:36:22,262 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 05:36:22,262 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 05:36:22,263 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 05:36:22,264 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 05:36:22,265 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 05:36:22,266 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 05:36:22,266 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 05:36:22,267 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 05:36:22,267 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 05:36:22,268 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 05:36:22,269 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 05:36:22,269 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 05:36:22,270 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 05:36:22,313 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 05:36:22,313 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 05:36:22,320 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 05:36:22,320 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 05:36:22,320 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 05:36:22,320 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 05:36:22,321 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 05:36:22,321 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 05:36:22,321 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 05:36:22,321 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 05:36:22,321 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 05:36:22,322 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 05:36:22,322 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 05:36:22,322 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 05:36:22,322 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 05:36:22,322 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 05:36:22,323 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 05:36:22,323 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 05:36:22,324 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 05:36:22,324 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 05:36:22,324 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 05:36:22,324 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 05:36:22,325 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 05:36:22,325 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 05:36:22,325 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 05:36:22,325 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 05:36:22,325 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 05:36:22,326 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 05:36:22,326 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 05:36:22,327 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=0.4;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=0.4;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=0.4;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=0.4;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=0.4;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=0.4;log-additional-information=true; [2020-09-25 05:36:22,794 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 05:36:22,817 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 05:36:22,822 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 05:36:22,823 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 05:36:22,824 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 05:36:22,825 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label32.c [2020-09-25 05:36:22,911 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/35b1f9b05/a3eda993b9364e52a499be5cbcbf61d8/FLAG05a3aa601 [2020-09-25 05:36:23,585 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 05:36:23,586 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem02_label32.c [2020-09-25 05:36:23,605 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/35b1f9b05/a3eda993b9364e52a499be5cbcbf61d8/FLAG05a3aa601 [2020-09-25 05:36:23,762 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/35b1f9b05/a3eda993b9364e52a499be5cbcbf61d8 [2020-09-25 05:36:23,780 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 05:36:23,786 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 05:36:23,790 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 05:36:23,790 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 05:36:23,795 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 05:36:23,796 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 05:36:23" (1/1) ... [2020-09-25 05:36:23,802 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@245d8fce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:36:23, skipping insertion in model container [2020-09-25 05:36:23,802 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 05:36:23" (1/1) ... [2020-09-25 05:36:23,812 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 05:36:23,871 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 05:36:24,340 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 05:36:24,346 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 05:36:24,549 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 05:36:24,569 INFO L208 MainTranslator]: Completed translation [2020-09-25 05:36:24,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:36:24 WrapperNode [2020-09-25 05:36:24,571 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 05:36:24,572 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 05:36:24,572 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 05:36:24,572 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 05:36:24,593 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:36:24" (1/1) ... [2020-09-25 05:36:24,595 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:36:24" (1/1) ... [2020-09-25 05:36:24,620 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:36:24" (1/1) ... [2020-09-25 05:36:24,620 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:36:24" (1/1) ... [2020-09-25 05:36:24,660 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:36:24" (1/1) ... [2020-09-25 05:36:24,679 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:36:24" (1/1) ... [2020-09-25 05:36:24,684 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:36:24" (1/1) ... [2020-09-25 05:36:24,691 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 05:36:24,691 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 05:36:24,691 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 05:36:24,691 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 05:36:24,693 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:36:24" (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 05:36:24,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 05:36:24,771 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 05:36:24,771 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-25 05:36:24,771 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 05:36:24,771 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-25 05:36:24,771 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 05:36:24,772 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 05:36:24,772 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-25 05:36:24,772 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 05:36:24,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 05:36:24,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 05:36:26,128 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 05:36:26,129 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 05:36:26,138 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 05:36:26 BoogieIcfgContainer [2020-09-25 05:36:26,138 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 05:36:26,140 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 05:36:26,140 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 05:36:26,143 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 05:36:26,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 05:36:23" (1/3) ... [2020-09-25 05:36:26,145 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e80f973 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 05:36:26, skipping insertion in model container [2020-09-25 05:36:26,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:36:24" (2/3) ... [2020-09-25 05:36:26,145 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e80f973 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 05:36:26, skipping insertion in model container [2020-09-25 05:36:26,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 05:36:26" (3/3) ... [2020-09-25 05:36:26,148 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label32.c [2020-09-25 05:36:26,160 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 05:36:26,172 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 05:36:26,196 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 05:36:26,233 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 05:36:26,233 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 05:36:26,234 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 05:36:26,234 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 05:36:26,234 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 05:36:26,234 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 05:36:26,234 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 05:36:26,234 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 05:36:26,272 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states. [2020-09-25 05:36:26,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-09-25 05:36:26,294 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:36:26,296 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 05:36:26,297 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:36:26,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:36:26,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1568421906, now seen corresponding path program 1 times [2020-09-25 05:36:26,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:36:26,318 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1652298201] [2020-09-25 05:36:26,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:36:26,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:36:26,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:36:27,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:36:27,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:36:27,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:36:29,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:36:30,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:36:30,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:36:30,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:36:30,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:36:31,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:36:31,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-09-25 05:36:31,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 05:36:31,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-09-25 05:36:31,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:36:31,622 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:36:31,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 05:36:31,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 05:36:31,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-09-25 05:36:31,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 05:36:31,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:36:31,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:36:31,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:36:31,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:36:31,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 05:36:31,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:36:31,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-09-25 05:36:31,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:36:31,910 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:36:31,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 05:36:31,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:36:31,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-25 05:36:31,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:36:31,979 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 05:36:31,980 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1652298201] [2020-09-25 05:36:31,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 05:36:31,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 05:36:31,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83557614] [2020-09-25 05:36:31,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 05:36:31,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:36:32,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 05:36:32,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 05:36:32,017 INFO L87 Difference]: Start difference. First operand 527 states. Second operand 4 states. [2020-09-25 05:36:34,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:36:34,412 INFO L93 Difference]: Finished difference Result 1247 states and 1695 transitions. [2020-09-25 05:36:34,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 05:36:34,415 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 135 [2020-09-25 05:36:34,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:36:34,451 INFO L225 Difference]: With dead ends: 1247 [2020-09-25 05:36:34,452 INFO L226 Difference]: Without dead ends: 669 [2020-09-25 05:36:34,466 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 05:36:34,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2020-09-25 05:36:34,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 621. [2020-09-25 05:36:34,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 621 states. [2020-09-25 05:36:34,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 723 transitions. [2020-09-25 05:36:34,606 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 723 transitions. Word has length 135 [2020-09-25 05:36:34,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:36:34,607 INFO L479 AbstractCegarLoop]: Abstraction has 621 states and 723 transitions. [2020-09-25 05:36:34,607 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 05:36:34,607 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 723 transitions. [2020-09-25 05:36:34,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-09-25 05:36:34,615 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:36:34,615 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 05:36:34,616 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 05:36:34,616 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:36:34,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:36:34,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1119247929, now seen corresponding path program 1 times [2020-09-25 05:36:34,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:36:34,617 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [795412860] [2020-09-25 05:36:34,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:36:34,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:36:34,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:36:34,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:36:35,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:36:35,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:36:36,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:36:38,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:36:38,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:36:38,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:36:39,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:36:39,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-09-25 05:36:39,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 05:36:39,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-09-25 05:36:39,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:36:39,704 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:36:39,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 05:36:39,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-09-25 05:36:39,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-09-25 05:36:39,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:36:39,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:36:39,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:36:39,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:36:39,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:36:39,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 05:36:39,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:36:39,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 05:36:39,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:36:39,843 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:36:39,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:36:39,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:36:39,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:36:39,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:36:39,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 05:36:39,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:36:39,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:36:39,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:36:39,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 05:36:39,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:36:39,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-25 05:36:39,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:36:39,883 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:36:39,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 05:36:39,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:36:39,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-25 05:36:39,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:36:39,916 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 05:36:39,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [795412860] [2020-09-25 05:36:39,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 05:36:39,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 05:36:39,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54280606] [2020-09-25 05:36:39,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 05:36:39,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:36:39,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 05:36:39,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 05:36:39,920 INFO L87 Difference]: Start difference. First operand 621 states and 723 transitions. Second operand 5 states. [2020-09-25 05:36:41,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:36:41,890 INFO L93 Difference]: Finished difference Result 1533 states and 1847 transitions. [2020-09-25 05:36:41,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 05:36:41,891 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 152 [2020-09-25 05:36:41,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:36:41,898 INFO L225 Difference]: With dead ends: 1533 [2020-09-25 05:36:41,898 INFO L226 Difference]: Without dead ends: 934 [2020-09-25 05:36:41,901 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-25 05:36:41,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 934 states. [2020-09-25 05:36:41,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 934 to 924. [2020-09-25 05:36:41,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 924 states. [2020-09-25 05:36:41,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 1105 transitions. [2020-09-25 05:36:41,947 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 1105 transitions. Word has length 152 [2020-09-25 05:36:41,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:36:41,948 INFO L479 AbstractCegarLoop]: Abstraction has 924 states and 1105 transitions. [2020-09-25 05:36:41,948 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 05:36:41,948 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 1105 transitions. [2020-09-25 05:36:41,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-09-25 05:36:41,953 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:36:41,954 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 05:36:41,954 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 05:36:41,954 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:36:41,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:36:41,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1353322846, now seen corresponding path program 1 times [2020-09-25 05:36:41,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:36:41,956 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1228685236] [2020-09-25 05:36:41,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:36:41,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:36:42,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:36:42,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:36:42,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:36:42,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:36:42,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:36:43,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:36:47,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:36:47,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 199 [2020-09-25 05:36:47,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 05:36:47,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-09-25 05:36:47,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:36:47,002 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:36:47,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 05:36:47,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-09-25 05:36:47,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-09-25 05:36:47,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:36:47,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:36:47,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:36:47,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:36:47,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:36:47,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 05:36:47,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:36:47,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 05:36:47,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:36:47,112 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:36:47,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:36:47,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:36:47,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:36:47,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:36:47,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 05:36:47,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:36:47,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:36:47,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:36:47,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 05:36:47,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:36:47,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-25 05:36:47,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:36:47,156 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:36:47,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 05:36:47,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:36:47,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-25 05:36:47,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 05:36:47,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-25 05:36:47,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:36:47,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:36:47,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:36:47,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-25 05:36:47,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:36:47,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-09-25 05:36:47,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:36:47,246 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:36:47,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 05:36:47,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 05:36:47,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-09-25 05:36:47,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 05:36:47,355 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 05:36:47,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1228685236] [2020-09-25 05:36:47,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 05:36:47,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 05:36:47,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558633432] [2020-09-25 05:36:47,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 05:36:47,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:36:47,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 05:36:47,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-09-25 05:36:47,365 INFO L87 Difference]: Start difference. First operand 924 states and 1105 transitions. Second operand 7 states. [2020-09-25 05:36:49,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:36:49,999 INFO L93 Difference]: Finished difference Result 2391 states and 2955 transitions. [2020-09-25 05:36:50,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 05:36:50,000 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 186 [2020-09-25 05:36:50,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:36:50,011 INFO L225 Difference]: With dead ends: 2391 [2020-09-25 05:36:50,011 INFO L226 Difference]: Without dead ends: 1489 [2020-09-25 05:36:50,015 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-09-25 05:36:50,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1489 states. [2020-09-25 05:36:50,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1489 to 1241. [2020-09-25 05:36:50,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1241 states. [2020-09-25 05:36:50,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1241 states to 1241 states and 1552 transitions. [2020-09-25 05:36:50,073 INFO L78 Accepts]: Start accepts. Automaton has 1241 states and 1552 transitions. Word has length 186 [2020-09-25 05:36:50,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:36:50,076 INFO L479 AbstractCegarLoop]: Abstraction has 1241 states and 1552 transitions. [2020-09-25 05:36:50,076 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 05:36:50,076 INFO L276 IsEmpty]: Start isEmpty. Operand 1241 states and 1552 transitions. [2020-09-25 05:36:50,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-09-25 05:36:50,083 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:36:50,084 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 05:36:50,084 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 05:36:50,084 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:36:50,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:36:50,086 INFO L82 PathProgramCache]: Analyzing trace with hash 853921109, now seen corresponding path program 1 times [2020-09-25 05:36:50,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:36:50,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1618580133] [2020-09-25 05:36:50,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:36:50,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:36:50,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:36:50,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:36:50,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:36:50,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:36:50,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:36:55,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:36:55,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 204 [2020-09-25 05:36:55,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 05:36:55,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4894 [2020-09-25 05:36:55,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:36:55,029 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:36:55,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 05:36:55,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 80 [2020-09-25 05:36:55,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 123 [2020-09-25 05:36:55,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:36:55,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:36:55,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:36:55,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:36:55,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:36:55,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 05:36:55,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:36:55,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-25 05:36:55,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:36:55,162 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:36:55,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:36:55,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:36:55,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:36:55,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 05:36:55,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 05:36:55,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:36:55,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:36:55,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:36:55,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-25 05:36:55,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:36:55,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-25 05:36:55,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:36:55,201 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:36:55,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:36:55,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:36:55,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:36:55,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:36:55,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-09-25 05:36:55,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:36:55,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:36:55,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:36:55,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-25 05:36:55,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:36:55,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-09-25 05:36:55,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:36:55,248 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:36:55,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 05:36:55,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:36:55,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-25 05:36:55,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:36:55,346 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 05:36:55,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1618580133] [2020-09-25 05:36:55,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 05:36:55,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 05:36:55,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945519686] [2020-09-25 05:36:55,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 05:36:55,350 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:36:55,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 05:36:55,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 05:36:55,351 INFO L87 Difference]: Start difference. First operand 1241 states and 1552 transitions. Second operand 5 states. [2020-09-25 05:36:57,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:36:57,579 INFO L93 Difference]: Finished difference Result 3226 states and 4186 transitions. [2020-09-25 05:36:57,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 05:36:57,579 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 191 [2020-09-25 05:36:57,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:36:57,592 INFO L225 Difference]: With dead ends: 3226 [2020-09-25 05:36:57,593 INFO L226 Difference]: Without dead ends: 1481 [2020-09-25 05:36:57,603 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 05:36:57,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1481 states. [2020-09-25 05:36:57,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1481 to 1470. [2020-09-25 05:36:57,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1470 states. [2020-09-25 05:36:57,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1470 states to 1470 states and 1759 transitions. [2020-09-25 05:36:57,672 INFO L78 Accepts]: Start accepts. Automaton has 1470 states and 1759 transitions. Word has length 191 [2020-09-25 05:36:57,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:36:57,674 INFO L479 AbstractCegarLoop]: Abstraction has 1470 states and 1759 transitions. [2020-09-25 05:36:57,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 05:36:57,674 INFO L276 IsEmpty]: Start isEmpty. Operand 1470 states and 1759 transitions. [2020-09-25 05:36:57,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-09-25 05:36:57,684 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:36:57,684 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 05:36:57,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 05:36:57,685 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:36:57,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:36:57,685 INFO L82 PathProgramCache]: Analyzing trace with hash 867866385, now seen corresponding path program 1 times [2020-09-25 05:36:57,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:36:57,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [293040943] [2020-09-25 05:36:57,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:36:57,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:36:57,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:36:57,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:36:59,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:36:59,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:36:59,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:36:59,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:37:00,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:37:02,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:37:02,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:37:02,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:37:02,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 212 [2020-09-25 05:37:02,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 05:37:02,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-09-25 05:37:02,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:37:02,728 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:37:02,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 05:37:02,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 86 [2020-09-25 05:37:02,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-09-25 05:37:02,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:37:02,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:37:02,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:37:02,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:37:02,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:37:02,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 05:37:02,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:37:02,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-09-25 05:37:02,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:37:02,983 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:37:02,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:37:02,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:37:02,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:37:02,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:37:03,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 05:37:03,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:37:03,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:37:03,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:37:03,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-25 05:37:03,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:37:03,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-09-25 05:37:03,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:37:03,030 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:37:03,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:37:03,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:37:03,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:37:03,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:37:03,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-09-25 05:37:03,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:37:03,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:37:03,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:37:03,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-25 05:37:03,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:37:03,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-09-25 05:37:03,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:37:03,078 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:37:03,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 05:37:03,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:37:03,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-25 05:37:03,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:37:03,169 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 05:37:03,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [293040943] [2020-09-25 05:37:03,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 05:37:03,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 05:37:03,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977377490] [2020-09-25 05:37:03,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 05:37:03,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:37:03,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 05:37:03,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 05:37:03,174 INFO L87 Difference]: Start difference. First operand 1470 states and 1759 transitions. Second operand 5 states. [2020-09-25 05:37:04,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:37:04,725 INFO L93 Difference]: Finished difference Result 3682 states and 4523 transitions. [2020-09-25 05:37:04,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 05:37:04,728 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 199 [2020-09-25 05:37:04,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:37:04,745 INFO L225 Difference]: With dead ends: 3682 [2020-09-25 05:37:04,746 INFO L226 Difference]: Without dead ends: 2234 [2020-09-25 05:37:04,751 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 05:37:04,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2234 states. [2020-09-25 05:37:04,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2234 to 2069. [2020-09-25 05:37:04,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2069 states. [2020-09-25 05:37:04,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2069 states to 2069 states and 2473 transitions. [2020-09-25 05:37:04,828 INFO L78 Accepts]: Start accepts. Automaton has 2069 states and 2473 transitions. Word has length 199 [2020-09-25 05:37:04,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:37:04,828 INFO L479 AbstractCegarLoop]: Abstraction has 2069 states and 2473 transitions. [2020-09-25 05:37:04,828 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 05:37:04,829 INFO L276 IsEmpty]: Start isEmpty. Operand 2069 states and 2473 transitions. [2020-09-25 05:37:04,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2020-09-25 05:37:04,839 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:37:04,839 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 05:37:04,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 05:37:04,840 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:37:04,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:37:04,840 INFO L82 PathProgramCache]: Analyzing trace with hash 60157500, now seen corresponding path program 1 times [2020-09-25 05:37:04,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:37:04,841 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [345372829] [2020-09-25 05:37:04,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:37:04,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:37:04,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:37:05,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:37:05,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:37:05,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:37:05,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:37:06,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:37:06,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:37:06,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:37:06,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:37:09,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:37:09,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 275 [2020-09-25 05:37:09,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 05:37:09,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-25 05:37:09,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:37:09,910 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:37:09,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 05:37:09,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 152 [2020-09-25 05:37:09,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-09-25 05:37:09,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 05:37:10,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:37:10,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:37:10,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:37:10,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:37:10,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 05:37:10,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:37:10,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-25 05:37:10,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:37:10,039 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:37:10,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:37:10,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:37:10,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:37:10,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 05:37:10,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 05:37:10,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:37:10,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:37:10,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:37:10,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-25 05:37:10,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:37:10,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 05:37:10,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:37:10,070 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:37:10,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:37:10,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:37:10,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:37:10,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:37:10,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-09-25 05:37:10,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:37:10,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:37:10,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:37:10,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-25 05:37:10,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:37:10,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 05:37:10,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:37:10,092 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:37:10,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:37:10,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:37:10,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:37:10,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:37:10,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-09-25 05:37:10,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:37:10,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:37:10,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:37:10,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-09-25 05:37:10,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:37:10,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-09-25 05:37:10,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:37:10,179 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:37:10,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 05:37:10,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:37:10,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-09-25 05:37:10,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:37:10,280 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 05:37:10,280 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [345372829] [2020-09-25 05:37:10,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 05:37:10,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 05:37:10,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495431822] [2020-09-25 05:37:10,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 05:37:10,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:37:10,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 05:37:10,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 05:37:10,302 INFO L87 Difference]: Start difference. First operand 2069 states and 2473 transitions. Second operand 5 states.