/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 --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=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 12:21:10,174 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 12:21:10,178 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 12:21:10,204 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 12:21:10,205 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 12:21:10,206 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 12:21:10,207 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 12:21:10,209 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 12:21:10,211 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 12:21:10,211 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 12:21:10,212 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 12:21:10,214 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 12:21:10,214 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 12:21:10,215 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 12:21:10,216 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 12:21:10,217 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 12:21:10,218 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 12:21:10,219 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 12:21:10,220 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 12:21:10,222 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 12:21:10,224 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 12:21:10,225 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 12:21:10,226 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 12:21:10,227 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 12:21:10,229 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 12:21:10,230 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 12:21:10,230 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 12:21:10,231 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 12:21:10,231 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 12:21:10,232 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 12:21:10,232 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 12:21:10,233 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 12:21:10,234 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 12:21:10,235 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 12:21:10,236 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 12:21:10,236 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 12:21:10,237 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 12:21:10,237 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 12:21:10,237 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 12:21:10,238 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 12:21:10,239 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 12:21:10,240 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 [2020-09-21 12:21:10,264 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 12:21:10,265 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 12:21:10,266 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 12:21:10,266 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 12:21:10,266 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 12:21:10,267 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 12:21:10,267 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 12:21:10,267 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 12:21:10,267 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 12:21:10,267 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 12:21:10,268 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 12:21:10,268 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 12:21:10,268 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 12:21:10,268 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 12:21:10,268 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 12:21:10,269 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 12:21:10,269 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 12:21:10,269 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 12:21:10,269 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 12:21:10,270 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 12:21:10,270 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 12:21:10,270 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 12:21:10,270 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 12:21:10,270 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 12:21:10,271 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 12:21:10,271 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 12:21:10,271 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 12:21:10,271 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 12:21:10,271 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 12:21:10,271 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.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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-21 12:21:10,824 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 12:21:10,846 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 12:21:10,850 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 12:21:10,852 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 12:21:10,852 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 12:21:10,853 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c [2020-09-21 12:21:10,936 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e95fa5ae6/dcfac1d41c1841d09ef0a34896e46dc7/FLAGd19dd6e40 [2020-09-21 12:21:11,506 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 12:21:11,507 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c [2020-09-21 12:21:11,519 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e95fa5ae6/dcfac1d41c1841d09ef0a34896e46dc7/FLAGd19dd6e40 [2020-09-21 12:21:11,801 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e95fa5ae6/dcfac1d41c1841d09ef0a34896e46dc7 [2020-09-21 12:21:11,816 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 12:21:11,822 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 12:21:11,824 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 12:21:11,824 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 12:21:11,828 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 12:21:11,829 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:21:11" (1/1) ... [2020-09-21 12:21:11,835 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e4ff61e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:21:11, skipping insertion in model container [2020-09-21 12:21:11,835 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:21:11" (1/1) ... [2020-09-21 12:21:11,846 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 12:21:11,905 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 12:21:12,178 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:21:12,184 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 12:21:12,230 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:21:12,335 INFO L208 MainTranslator]: Completed translation [2020-09-21 12:21:12,335 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:21:12 WrapperNode [2020-09-21 12:21:12,335 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 12:21:12,336 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 12:21:12,336 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 12:21:12,337 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 12:21:12,350 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:21:12" (1/1) ... [2020-09-21 12:21:12,350 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:21:12" (1/1) ... [2020-09-21 12:21:12,359 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:21:12" (1/1) ... [2020-09-21 12:21:12,360 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:21:12" (1/1) ... [2020-09-21 12:21:12,370 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:21:12" (1/1) ... [2020-09-21 12:21:12,379 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:21:12" (1/1) ... [2020-09-21 12:21:12,381 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:21:12" (1/1) ... [2020-09-21 12:21:12,385 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 12:21:12,385 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 12:21:12,385 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 12:21:12,386 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 12:21:12,387 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:21:12" (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 [2020-09-21 12:21:12,472 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 12:21:12,473 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 12:21:12,473 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-21 12:21:12,473 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2020-09-21 12:21:12,473 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2020-09-21 12:21:12,473 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2020-09-21 12:21:12,474 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 12:21:12,474 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 12:21:12,474 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-21 12:21:12,474 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-21 12:21:12,474 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-21 12:21:12,475 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2020-09-21 12:21:12,475 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2020-09-21 12:21:12,475 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2020-09-21 12:21:12,475 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 12:21:12,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 12:21:12,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 12:21:13,002 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 12:21:13,003 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-21 12:21:13,009 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:21:13 BoogieIcfgContainer [2020-09-21 12:21:13,009 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 12:21:13,010 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 12:21:13,010 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 12:21:13,014 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 12:21:13,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 12:21:11" (1/3) ... [2020-09-21 12:21:13,015 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a926f41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:21:13, skipping insertion in model container [2020-09-21 12:21:13,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:21:12" (2/3) ... [2020-09-21 12:21:13,016 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a926f41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:21:13, skipping insertion in model container [2020-09-21 12:21:13,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:21:13" (3/3) ... [2020-09-21 12:21:13,018 INFO L109 eAbstractionObserver]: Analyzing ICFG soft_float_2a.c.cil.c [2020-09-21 12:21:13,027 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 12:21:13,037 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 12:21:13,057 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 12:21:13,085 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 12:21:13,086 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 12:21:13,086 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 12:21:13,086 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 12:21:13,086 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 12:21:13,086 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 12:21:13,087 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 12:21:13,087 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 12:21:13,112 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states. [2020-09-21 12:21:13,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-21 12:21:13,123 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:21:13,125 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:21:13,125 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:21:13,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:21:13,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1570912407, now seen corresponding path program 1 times [2020-09-21 12:21:13,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:21:13,142 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [64716788] [2020-09-21 12:21:13,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:21:13,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:13,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:13,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:13,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:13,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:14,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:14,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-21 12:21:14,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-21 12:21:14,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1009 [2020-09-21 12:21:14,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:14,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:21:14,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-09-21 12:21:14,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-21 12:21:14,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-21 12:21:14,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:21:14,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:14,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:14,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:14,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:21:14,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:14,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 12:21:14,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:14,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:14,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:14,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:14,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:14,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 12:21:14,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:14,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:14,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:14,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:14,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:14,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 12:21:14,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:14,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:14,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:14,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:14,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:14,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 12:21:14,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:14,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:14,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:14,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:14,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:14,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:21:14,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-09-21 12:21:14,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:14,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:14,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:14,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:14,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:14,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-21 12:21:14,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:14,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:14,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:14,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:14,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:14,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:21:14,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:14,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:14,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:14,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:14,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:14,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-09-21 12:21:14,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:14,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:14,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:14,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:14,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:14,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:21:14,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:14,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:14,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:14,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:14,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:14,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-21 12:21:14,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:14,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:14,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:14,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-21 12:21:14,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:14,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-09-21 12:21:14,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:14,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:21:14,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:14,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-21 12:21:14,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:14,518 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-09-21 12:21:14,519 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [64716788] [2020-09-21 12:21:14,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:21:14,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:21:14,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399958382] [2020-09-21 12:21:14,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:21:14,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:21:14,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:21:14,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:21:14,552 INFO L87 Difference]: Start difference. First operand 68 states. Second operand 3 states. [2020-09-21 12:21:14,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:21:14,611 INFO L93 Difference]: Finished difference Result 118 states and 174 transitions. [2020-09-21 12:21:14,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:21:14,614 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 48 [2020-09-21 12:21:14,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:21:14,628 INFO L225 Difference]: With dead ends: 118 [2020-09-21 12:21:14,629 INFO L226 Difference]: Without dead ends: 52 [2020-09-21 12:21:14,634 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:21:14,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-09-21 12:21:14,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-09-21 12:21:14,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-21 12:21:14,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 70 transitions. [2020-09-21 12:21:14,694 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 70 transitions. Word has length 48 [2020-09-21 12:21:14,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:21:14,696 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 70 transitions. [2020-09-21 12:21:14,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:21:14,697 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 70 transitions. [2020-09-21 12:21:14,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-09-21 12:21:14,700 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:21:14,700 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:21:14,701 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 12:21:14,701 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:21:14,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:21:14,701 INFO L82 PathProgramCache]: Analyzing trace with hash -880454641, now seen corresponding path program 1 times [2020-09-21 12:21:14,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:21:14,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [742381442] [2020-09-21 12:21:14,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:21:14,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:14,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:14,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:14,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:14,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:14,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:15,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:15,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-21 12:21:15,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-21 12:21:15,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1003 [2020-09-21 12:21:15,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:15,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:21:15,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-21 12:21:15,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-21 12:21:15,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:15,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:21:15,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:15,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:15,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:15,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:21:15,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:15,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:21:15,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:15,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:15,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:15,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:15,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-21 12:21:15,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 12:21:15,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:15,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:15,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:15,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:15,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:15,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:21:15,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:15,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:15,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:15,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:15,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:15,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 12:21:15,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:15,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:15,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:15,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:15,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:15,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-21 12:21:15,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:15,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:21:15,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 12:21:15,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 12:21:15,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:15,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-21 12:21:15,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:15,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:15,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:15,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:15,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:15,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 12:21:15,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:15,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:15,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-21 12:21:15,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:15,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:15,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-09-21 12:21:15,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:15,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:15,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:15,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:15,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:15,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 12:21:15,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:15,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:15,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-21 12:21:15,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:15,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:15,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-21 12:21:15,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:15,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:15,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:15,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-21 12:21:15,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:15,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-21 12:21:15,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:15,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:15,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-09-21 12:21:15,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:15,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:15,919 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-21 12:21:15,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [742381442] [2020-09-21 12:21:15,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:21:15,921 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-09-21 12:21:15,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458830222] [2020-09-21 12:21:15,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 12:21:15,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:21:15,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 12:21:15,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:21:15,934 INFO L87 Difference]: Start difference. First operand 52 states and 70 transitions. Second operand 4 states. [2020-09-21 12:21:16,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:21:16,133 INFO L93 Difference]: Finished difference Result 127 states and 177 transitions. [2020-09-21 12:21:16,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 12:21:16,135 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 50 [2020-09-21 12:21:16,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:21:16,139 INFO L225 Difference]: With dead ends: 127 [2020-09-21 12:21:16,141 INFO L226 Difference]: Without dead ends: 83 [2020-09-21 12:21:16,142 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:21:16,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-21 12:21:16,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 73. [2020-09-21 12:21:16,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-21 12:21:16,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 101 transitions. [2020-09-21 12:21:16,160 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 101 transitions. Word has length 50 [2020-09-21 12:21:16,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:21:16,161 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 101 transitions. [2020-09-21 12:21:16,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 12:21:16,161 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 101 transitions. [2020-09-21 12:21:16,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-09-21 12:21:16,163 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:21:16,164 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:21:16,164 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 12:21:16,164 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:21:16,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:21:16,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1431355892, now seen corresponding path program 1 times [2020-09-21 12:21:16,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:21:16,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [779139929] [2020-09-21 12:21:16,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:21:16,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:16,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:16,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:16,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:16,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:16,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:17,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:17,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-09-21 12:21:17,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-21 12:21:17,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 999 [2020-09-21 12:21:17,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:17,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:21:17,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-21 12:21:17,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 12:21:17,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:17,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:21:17,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:17,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:17,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:17,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:21:17,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:17,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:21:17,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:17,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:17,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:17,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:17,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:17,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 12:21:17,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:17,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:17,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:17,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:17,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:17,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:21:17,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:17,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:17,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:17,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:17,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:17,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 12:21:17,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:17,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:17,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:17,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-21 12:21:17,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:17,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-21 12:21:17,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:17,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:21:17,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 12:21:17,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-21 12:21:17,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:17,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-21 12:21:17,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:17,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:17,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:17,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:17,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:17,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 12:21:17,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:17,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:17,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-21 12:21:17,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:17,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:17,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-09-21 12:21:17,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:17,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:17,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:17,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:17,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:17,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 12:21:17,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:17,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:17,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-21 12:21:17,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:17,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:17,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-09-21 12:21:17,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:17,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:17,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:17,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-21 12:21:17,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:17,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-21 12:21:17,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:17,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:17,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-09-21 12:21:17,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:17,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:17,312 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-21 12:21:17,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [779139929] [2020-09-21 12:21:17,313 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:21:17,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-09-21 12:21:17,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789018640] [2020-09-21 12:21:17,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 12:21:17,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:21:17,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 12:21:17,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:21:17,316 INFO L87 Difference]: Start difference. First operand 73 states and 101 transitions. Second operand 4 states. [2020-09-21 12:21:17,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:21:17,413 INFO L93 Difference]: Finished difference Result 141 states and 194 transitions. [2020-09-21 12:21:17,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 12:21:17,414 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 53 [2020-09-21 12:21:17,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:21:17,416 INFO L225 Difference]: With dead ends: 141 [2020-09-21 12:21:17,416 INFO L226 Difference]: Without dead ends: 89 [2020-09-21 12:21:17,417 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:21:17,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-21 12:21:17,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 81. [2020-09-21 12:21:17,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-21 12:21:17,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 111 transitions. [2020-09-21 12:21:17,433 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 111 transitions. Word has length 53 [2020-09-21 12:21:17,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:21:17,434 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 111 transitions. [2020-09-21 12:21:17,434 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 12:21:17,434 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 111 transitions. [2020-09-21 12:21:17,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-09-21 12:21:17,436 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:21:17,437 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:21:17,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 12:21:17,437 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:21:17,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:21:17,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1173676422, now seen corresponding path program 1 times [2020-09-21 12:21:17,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:21:17,438 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [758117504] [2020-09-21 12:21:17,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:21:17,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:17,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:17,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:17,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:17,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:17,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:18,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:18,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-09-21 12:21:18,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-21 12:21:18,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1006 [2020-09-21 12:21:18,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:18,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:21:18,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-09-21 12:21:18,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-21 12:21:18,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:18,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:21:18,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:18,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:18,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:18,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:21:18,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:18,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 12:21:18,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:18,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:18,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:18,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:18,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:18,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 12:21:18,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:18,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:18,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:18,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:18,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:18,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 12:21:18,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:18,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:18,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:18,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:18,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:18,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 12:21:18,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:18,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:18,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:18,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:18,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-21 12:21:18,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:21:18,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-21 12:21:18,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:18,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:18,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:18,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:18,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:18,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-21 12:21:18,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:18,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:18,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:18,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:18,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:18,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:21:18,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:18,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:18,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:18,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:18,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:18,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-21 12:21:18,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:18,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:18,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:18,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:18,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:18,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 12:21:18,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:18,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:18,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:18,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:18,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:18,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-09-21 12:21:18,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:18,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:18,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:18,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-21 12:21:18,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:18,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-09-21 12:21:18,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:18,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:21:18,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:18,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-21 12:21:18,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:18,594 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-09-21 12:21:18,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [758117504] [2020-09-21 12:21:18,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:21:18,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 12:21:18,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359574413] [2020-09-21 12:21:18,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 12:21:18,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:21:18,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 12:21:18,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:21:18,600 INFO L87 Difference]: Start difference. First operand 81 states and 111 transitions. Second operand 4 states. [2020-09-21 12:21:18,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:21:18,648 INFO L93 Difference]: Finished difference Result 93 states and 125 transitions. [2020-09-21 12:21:18,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 12:21:18,650 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54 [2020-09-21 12:21:18,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:21:18,653 INFO L225 Difference]: With dead ends: 93 [2020-09-21 12:21:18,653 INFO L226 Difference]: Without dead ends: 81 [2020-09-21 12:21:18,656 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:21:18,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-21 12:21:18,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-09-21 12:21:18,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-21 12:21:18,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 110 transitions. [2020-09-21 12:21:18,686 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 110 transitions. Word has length 54 [2020-09-21 12:21:18,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:21:18,687 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 110 transitions. [2020-09-21 12:21:18,687 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 12:21:18,687 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 110 transitions. [2020-09-21 12:21:18,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-09-21 12:21:18,696 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:21:18,697 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:21:18,697 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 12:21:18,697 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:21:18,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:21:18,698 INFO L82 PathProgramCache]: Analyzing trace with hash 2100222520, now seen corresponding path program 1 times [2020-09-21 12:21:18,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:21:18,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1466789586] [2020-09-21 12:21:18,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:21:18,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:18,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:18,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:19,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:19,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:19,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:19,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:19,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-09-21 12:21:19,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-21 12:21:19,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1000 [2020-09-21 12:21:19,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:19,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:21:19,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-21 12:21:19,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 12:21:19,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:19,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:21:19,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:19,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:19,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:19,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:21:19,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:19,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:21:19,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:19,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:19,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:19,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:19,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-21 12:21:19,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 12:21:19,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:19,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:19,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:19,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:19,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:19,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:21:19,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:19,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:19,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:19,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:19,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-21 12:21:19,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 12:21:19,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:19,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:19,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:19,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-21 12:21:19,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:19,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-21 12:21:19,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:19,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:21:19,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 12:21:19,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-21 12:21:19,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:19,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-21 12:21:19,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:19,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:19,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:19,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:19,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:19,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 12:21:19,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:19,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:19,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-21 12:21:19,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:19,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:19,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-21 12:21:19,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:19,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:19,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:19,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:19,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:19,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 12:21:19,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:19,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:19,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-21 12:21:19,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:19,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:19,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-09-21 12:21:19,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:19,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:19,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:19,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-21 12:21:19,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:19,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-21 12:21:19,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:19,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:19,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-09-21 12:21:19,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:19,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:19,891 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-21 12:21:19,892 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1466789586] [2020-09-21 12:21:19,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:21:19,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-09-21 12:21:19,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012276945] [2020-09-21 12:21:19,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 12:21:19,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:21:19,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 12:21:19,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:21:19,896 INFO L87 Difference]: Start difference. First operand 81 states and 110 transitions. Second operand 4 states. [2020-09-21 12:21:20,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:21:20,050 INFO L93 Difference]: Finished difference Result 155 states and 210 transitions. [2020-09-21 12:21:20,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 12:21:20,051 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54 [2020-09-21 12:21:20,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:21:20,055 INFO L225 Difference]: With dead ends: 155 [2020-09-21 12:21:20,055 INFO L226 Difference]: Without dead ends: 85 [2020-09-21 12:21:20,056 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:21:20,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-21 12:21:20,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 73. [2020-09-21 12:21:20,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-21 12:21:20,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 96 transitions. [2020-09-21 12:21:20,088 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 96 transitions. Word has length 54 [2020-09-21 12:21:20,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:21:20,088 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 96 transitions. [2020-09-21 12:21:20,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 12:21:20,091 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 96 transitions. [2020-09-21 12:21:20,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-21 12:21:20,092 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:21:20,093 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:21:20,093 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 12:21:20,093 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:21:20,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:21:20,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1604110505, now seen corresponding path program 1 times [2020-09-21 12:21:20,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:21:20,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1063651995] [2020-09-21 12:21:20,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:21:20,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:20,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:20,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:20,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:20,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:20,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:21,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:21,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-09-21 12:21:21,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-21 12:21:21,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1005 [2020-09-21 12:21:21,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:21,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:21:21,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-21 12:21:21,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-21 12:21:21,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:21,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:21:21,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:21,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:21,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:21,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:21:21,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:21,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:21:21,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:21,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:21,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:21,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:21,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:21,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 12:21:21,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:21,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:21,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:21,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:21,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:21,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:21:21,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:21,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:21,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:21,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:21,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:21,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 12:21:21,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:21,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:21,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:21,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-09-21 12:21:21,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:21,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-09-21 12:21:21,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:21,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:21:21,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 12:21:21,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-21 12:21:21,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:21,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-21 12:21:21,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:21,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:21,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:21,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:21,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:21,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 12:21:21,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:21,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:21,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-21 12:21:21,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:21,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:21,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-09-21 12:21:21,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:21,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:21,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:21,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:21,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:21,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:21:21,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:21,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:21,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-21 12:21:21,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:21,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:21,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-09-21 12:21:21,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:21,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:21,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:21,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-21 12:21:21,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:21,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-21 12:21:21,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:21,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:21,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-09-21 12:21:21,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:21,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:21,276 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-21 12:21:21,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1063651995] [2020-09-21 12:21:21,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:21:21,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-21 12:21:21,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185022621] [2020-09-21 12:21:21,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 12:21:21,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:21:21,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 12:21:21,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:21:21,279 INFO L87 Difference]: Start difference. First operand 73 states and 96 transitions. Second operand 5 states. [2020-09-21 12:21:21,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:21:21,388 INFO L93 Difference]: Finished difference Result 146 states and 197 transitions. [2020-09-21 12:21:21,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 12:21:21,389 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 55 [2020-09-21 12:21:21,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:21:21,391 INFO L225 Difference]: With dead ends: 146 [2020-09-21 12:21:21,391 INFO L226 Difference]: Without dead ends: 93 [2020-09-21 12:21:21,392 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-09-21 12:21:21,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-21 12:21:21,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 74. [2020-09-21 12:21:21,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-21 12:21:21,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 98 transitions. [2020-09-21 12:21:21,403 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 98 transitions. Word has length 55 [2020-09-21 12:21:21,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:21:21,404 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 98 transitions. [2020-09-21 12:21:21,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 12:21:21,404 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 98 transitions. [2020-09-21 12:21:21,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-09-21 12:21:21,406 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:21:21,406 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 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] [2020-09-21 12:21:21,406 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 12:21:21,406 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:21:21,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:21:21,407 INFO L82 PathProgramCache]: Analyzing trace with hash 339113435, now seen corresponding path program 1 times [2020-09-21 12:21:21,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:21:21,407 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [405517278] [2020-09-21 12:21:21,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:21:21,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:21,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:21,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:21,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:21,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:22,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:22,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:22,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-09-21 12:21:22,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-21 12:21:22,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1000 [2020-09-21 12:21:22,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:22,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:21:22,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-21 12:21:22,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-21 12:21:22,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:22,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:21:22,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:22,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:22,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:22,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:21:22,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:22,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:21:22,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:22,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:22,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:22,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:22,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:22,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 12:21:22,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:22,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:22,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:22,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:22,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:22,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:21:22,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:22,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:22,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:22,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:22,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:22,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 12:21:22,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:22,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:22,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:22,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-21 12:21:22,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:22,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-09-21 12:21:22,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:22,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:21:22,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 12:21:22,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-21 12:21:22,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:22,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-21 12:21:22,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:22,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:22,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:22,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:22,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:22,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 12:21:22,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:22,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:22,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-21 12:21:22,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:22,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:22,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-09-21 12:21:22,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:22,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:22,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:22,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:22,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:22,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 12:21:22,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:22,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:22,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-21 12:21:22,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:22,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:22,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-09-21 12:21:22,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:22,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:22,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:22,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-21 12:21:22,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:22,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-21 12:21:22,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:22,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:22,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-09-21 12:21:22,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:22,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:22,549 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-21 12:21:22,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [405517278] [2020-09-21 12:21:22,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:21:22,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-21 12:21:22,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236354125] [2020-09-21 12:21:22,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 12:21:22,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:21:22,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 12:21:22,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:21:22,552 INFO L87 Difference]: Start difference. First operand 74 states and 98 transitions. Second operand 5 states. [2020-09-21 12:21:22,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:21:22,644 INFO L93 Difference]: Finished difference Result 155 states and 208 transitions. [2020-09-21 12:21:22,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 12:21:22,646 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 56 [2020-09-21 12:21:22,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:21:22,648 INFO L225 Difference]: With dead ends: 155 [2020-09-21 12:21:22,648 INFO L226 Difference]: Without dead ends: 96 [2020-09-21 12:21:22,649 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-09-21 12:21:22,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-21 12:21:22,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 79. [2020-09-21 12:21:22,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-21 12:21:22,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 105 transitions. [2020-09-21 12:21:22,672 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 105 transitions. Word has length 56 [2020-09-21 12:21:22,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:21:22,675 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 105 transitions. [2020-09-21 12:21:22,675 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 12:21:22,675 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 105 transitions. [2020-09-21 12:21:22,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-09-21 12:21:22,676 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:21:22,676 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 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] [2020-09-21 12:21:22,678 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 12:21:22,678 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:21:22,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:21:22,679 INFO L82 PathProgramCache]: Analyzing trace with hash -82738054, now seen corresponding path program 1 times [2020-09-21 12:21:22,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:21:22,679 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [169421220] [2020-09-21 12:21:22,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:21:22,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:22,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:22,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:23,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:23,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:23,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:23,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:23,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-09-21 12:21:23,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-21 12:21:23,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1001 [2020-09-21 12:21:23,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:23,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 12:21:23,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-21 12:21:23,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-21 12:21:23,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:23,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:21:23,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:23,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:23,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:23,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:21:23,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:23,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:21:23,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:23,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:23,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:23,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:23,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:23,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 12:21:23,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:23,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:23,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:23,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:23,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:23,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:21:23,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:23,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:23,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:23,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:23,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:23,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 12:21:23,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:23,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:23,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:23,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-21 12:21:23,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:23,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-09-21 12:21:23,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:23,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 12:21:23,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 12:21:23,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-21 12:21:23,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:23,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-09-21 12:21:23,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:23,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:23,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:23,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:23,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:23,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 12:21:23,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:23,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:23,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-21 12:21:23,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:23,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:23,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-21 12:21:23,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:23,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:23,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:23,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:23,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:23,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 12:21:23,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:23,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:23,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-21 12:21:23,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:23,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:23,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-09-21 12:21:23,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:23,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:23,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:23,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-21 12:21:23,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:23,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-21 12:21:23,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:23,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:23,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-09-21 12:21:23,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:23,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:23,902 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-21 12:21:23,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [169421220] [2020-09-21 12:21:23,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:21:23,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-21 12:21:23,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175117780] [2020-09-21 12:21:23,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 12:21:23,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:21:23,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 12:21:23,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-21 12:21:23,906 INFO L87 Difference]: Start difference. First operand 79 states and 105 transitions. Second operand 6 states. [2020-09-21 12:21:24,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:21:24,131 INFO L93 Difference]: Finished difference Result 175 states and 236 transitions. [2020-09-21 12:21:24,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 12:21:24,135 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 58 [2020-09-21 12:21:24,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:21:24,137 INFO L225 Difference]: With dead ends: 175 [2020-09-21 12:21:24,137 INFO L226 Difference]: Without dead ends: 112 [2020-09-21 12:21:24,138 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-09-21 12:21:24,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-21 12:21:24,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 81. [2020-09-21 12:21:24,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-21 12:21:24,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 107 transitions. [2020-09-21 12:21:24,157 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 107 transitions. Word has length 58 [2020-09-21 12:21:24,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:21:24,158 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 107 transitions. [2020-09-21 12:21:24,158 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 12:21:24,158 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 107 transitions. [2020-09-21 12:21:24,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-21 12:21:24,159 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:21:24,159 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 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] [2020-09-21 12:21:24,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 12:21:24,160 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:21:24,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:21:24,160 INFO L82 PathProgramCache]: Analyzing trace with hash -413584342, now seen corresponding path program 2 times [2020-09-21 12:21:24,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:21:24,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [788843741] [2020-09-21 12:21:24,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:21:24,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:24,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:24,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:24,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:24,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:25,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:25,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-09-21 12:21:25,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-21 12:21:25,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1002 [2020-09-21 12:21:25,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:25,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 12:21:25,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-21 12:21:25,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-09-21 12:21:25,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:25,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:21:25,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:25,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:25,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:25,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:21:25,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:25,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:21:25,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:25,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:25,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:25,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:25,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:25,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 12:21:25,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:25,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:25,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:25,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:25,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:25,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-21 12:21:25,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:25,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:21:25,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:25,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:21:25,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:25,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 12:21:25,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:25,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:25,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:25,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:25,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-21 12:21:25,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:21:25,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-09-21 12:21:25,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:25,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:21:25,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:25,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-21 12:21:25,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:25,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-21 12:21:25,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:25,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:25,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:25,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:25,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:25,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 12:21:25,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:25,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:21:25,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:25,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 12:21:25,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:25,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-09-21 12:21:25,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:25,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:25,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:25,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:25,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:25,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 12:21:25,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:25,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:21:25,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:25,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 12:21:25,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:25,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-21 12:21:25,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:25,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:25,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:25,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-21 12:21:25,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:25,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-21 12:21:25,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:25,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:21:25,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:25,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-21 12:21:25,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:25,434 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-09-21 12:21:25,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [788843741] [2020-09-21 12:21:25,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:21:25,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-21 12:21:25,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089848601] [2020-09-21 12:21:25,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 12:21:25,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:21:25,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 12:21:25,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-21 12:21:25,442 INFO L87 Difference]: Start difference. First operand 81 states and 107 transitions. Second operand 6 states. [2020-09-21 12:21:25,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:21:25,522 INFO L93 Difference]: Finished difference Result 112 states and 155 transitions. [2020-09-21 12:21:25,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 12:21:25,523 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 59 [2020-09-21 12:21:25,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:21:25,527 INFO L225 Difference]: With dead ends: 112 [2020-09-21 12:21:25,527 INFO L226 Difference]: Without dead ends: 107 [2020-09-21 12:21:25,528 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-21 12:21:25,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-09-21 12:21:25,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 98. [2020-09-21 12:21:25,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-21 12:21:25,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 132 transitions. [2020-09-21 12:21:25,567 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 132 transitions. Word has length 59 [2020-09-21 12:21:25,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:21:25,568 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 132 transitions. [2020-09-21 12:21:25,569 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 12:21:25,569 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 132 transitions. [2020-09-21 12:21:25,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-21 12:21:25,571 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:21:25,571 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 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] [2020-09-21 12:21:25,571 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-21 12:21:25,572 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:21:25,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:21:25,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1742682830, now seen corresponding path program 1 times [2020-09-21 12:21:25,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:21:25,573 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [720423288] [2020-09-21 12:21:25,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:21:25,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:25,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:25,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:26,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:26,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:26,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-09-21 12:21:26,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:21:26,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1007 [2020-09-21 12:21:26,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:26,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 12:21:26,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 72 [2020-09-21 12:21:26,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 12:21:26,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:26,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:21:26,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:26,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:26,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:26,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:21:26,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:26,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:21:26,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:26,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:26,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:26,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:26,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-21 12:21:26,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 12:21:26,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:26,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:26,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:26,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:26,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:26,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:21:26,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:26,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:26,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:26,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:26,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:26,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 12:21:26,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:26,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:26,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:26,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:26,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-21 12:21:26,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:21:26,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-09-21 12:21:26,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:26,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:26,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:26,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:26,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:26,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-21 12:21:26,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:26,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:26,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:26,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:26,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:26,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:21:26,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:26,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:26,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:26,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:26,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:26,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-09-21 12:21:26,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:26,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:26,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:26,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:26,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:26,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:21:26,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:26,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:26,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:26,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:26,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:26,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-21 12:21:26,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:26,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:26,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:26,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-21 12:21:26,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:26,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-21 12:21:26,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:26,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:26,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:26,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:26,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:26,764 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-09-21 12:21:26,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [720423288] [2020-09-21 12:21:26,766 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:21:26,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 12:21:26,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500493110] [2020-09-21 12:21:26,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 12:21:26,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:21:26,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 12:21:26,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-21 12:21:26,769 INFO L87 Difference]: Start difference. First operand 98 states and 132 transitions. Second operand 6 states. [2020-09-21 12:21:26,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:21:26,827 INFO L93 Difference]: Finished difference Result 104 states and 137 transitions. [2020-09-21 12:21:26,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 12:21:26,828 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 61 [2020-09-21 12:21:26,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:21:26,830 INFO L225 Difference]: With dead ends: 104 [2020-09-21 12:21:26,830 INFO L226 Difference]: Without dead ends: 98 [2020-09-21 12:21:26,831 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-21 12:21:26,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-21 12:21:26,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2020-09-21 12:21:26,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-21 12:21:26,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 131 transitions. [2020-09-21 12:21:26,852 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 131 transitions. Word has length 61 [2020-09-21 12:21:26,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:21:26,853 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 131 transitions. [2020-09-21 12:21:26,853 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 12:21:26,853 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 131 transitions. [2020-09-21 12:21:26,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-21 12:21:26,860 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:21:26,860 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 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] [2020-09-21 12:21:26,861 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-21 12:21:26,861 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:21:26,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:21:26,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1685424528, now seen corresponding path program 1 times [2020-09-21 12:21:26,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:21:26,862 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [730555924] [2020-09-21 12:21:26,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:21:26,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:26,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:26,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:27,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:27,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:27,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-09-21 12:21:27,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:21:27,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1009 [2020-09-21 12:21:27,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:27,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 12:21:27,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-21 12:21:27,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-21 12:21:27,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:27,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:21:27,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:27,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:27,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:27,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:21:27,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:27,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:21:27,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:27,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:27,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:27,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:27,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:27,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 12:21:27,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:27,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:27,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:27,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:27,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:27,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:21:27,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:27,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:27,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:27,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:27,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:27,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 12:21:27,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:27,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:27,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:27,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-21 12:21:27,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:27,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-09-21 12:21:27,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:27,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 12:21:27,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 12:21:27,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-21 12:21:27,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:28,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-21 12:21:28,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:28,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:28,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:28,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:28,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:28,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 12:21:28,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:28,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:28,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-21 12:21:28,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:28,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:28,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-09-21 12:21:28,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:28,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:28,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:28,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:28,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:28,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 12:21:28,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:28,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:28,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-21 12:21:28,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:28,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:28,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-21 12:21:28,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:28,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:28,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:28,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-21 12:21:28,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:28,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-21 12:21:28,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:28,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:28,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-09-21 12:21:28,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:28,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-21 12:21:28,058 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-21 12:21:28,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [730555924] [2020-09-21 12:21:28,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:21:28,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-21 12:21:28,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058972211] [2020-09-21 12:21:28,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 12:21:28,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:21:28,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 12:21:28,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-09-21 12:21:28,063 INFO L87 Difference]: Start difference. First operand 98 states and 131 transitions. Second operand 6 states. [2020-09-21 12:21:28,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:21:28,173 INFO L93 Difference]: Finished difference Result 196 states and 278 transitions. [2020-09-21 12:21:28,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 12:21:28,177 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 61 [2020-09-21 12:21:28,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:21:28,178 INFO L225 Difference]: With dead ends: 196 [2020-09-21 12:21:28,179 INFO L226 Difference]: Without dead ends: 122 [2020-09-21 12:21:28,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-09-21 12:21:28,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-09-21 12:21:28,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 102. [2020-09-21 12:21:28,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-09-21 12:21:28,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 136 transitions. [2020-09-21 12:21:28,201 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 136 transitions. Word has length 61 [2020-09-21 12:21:28,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:21:28,201 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 136 transitions. [2020-09-21 12:21:28,201 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 12:21:28,202 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 136 transitions. [2020-09-21 12:21:28,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-09-21 12:21:28,203 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:21:28,203 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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] [2020-09-21 12:21:28,203 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-21 12:21:28,203 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:21:28,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:21:28,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1464337583, now seen corresponding path program 1 times [2020-09-21 12:21:28,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:21:28,204 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [836274450] [2020-09-21 12:21:28,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:21:28,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:28,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:28,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:28,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:29,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:29,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-09-21 12:21:29,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:21:29,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1000 [2020-09-21 12:21:29,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:29,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 12:21:29,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-09-21 12:21:29,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-21 12:21:29,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:29,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:21:29,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:29,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:29,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:29,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:21:29,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:29,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:21:29,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:29,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:29,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:29,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:29,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:29,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 12:21:29,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:29,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:29,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:29,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:29,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:29,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:21:29,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:29,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:29,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:29,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:29,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:29,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 12:21:29,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:29,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:29,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:29,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:29,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-21 12:21:29,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:21:29,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-09-21 12:21:29,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:29,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:29,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:29,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:29,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:29,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-21 12:21:29,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:29,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:29,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:29,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:29,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:29,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 12:21:29,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:29,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:29,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:29,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:29,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:29,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-21 12:21:29,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:29,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:29,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:29,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:29,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:29,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:21:29,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:29,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:29,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:29,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:29,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:29,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-09-21 12:21:29,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:29,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:29,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:29,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-21 12:21:29,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:29,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-09-21 12:21:29,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:29,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:21:29,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:29,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 12:21:29,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:29,460 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2020-09-21 12:21:29,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [836274450] [2020-09-21 12:21:29,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:21:29,462 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 12:21:29,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891407182] [2020-09-21 12:21:29,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 12:21:29,463 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:21:29,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 12:21:29,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-21 12:21:29,463 INFO L87 Difference]: Start difference. First operand 102 states and 136 transitions. Second operand 6 states. [2020-09-21 12:21:29,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:21:29,531 INFO L93 Difference]: Finished difference Result 119 states and 154 transitions. [2020-09-21 12:21:29,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 12:21:29,532 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 63 [2020-09-21 12:21:29,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:21:29,535 INFO L225 Difference]: With dead ends: 119 [2020-09-21 12:21:29,535 INFO L226 Difference]: Without dead ends: 109 [2020-09-21 12:21:29,536 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-21 12:21:29,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-21 12:21:29,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2020-09-21 12:21:29,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-09-21 12:21:29,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 142 transitions. [2020-09-21 12:21:29,552 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 142 transitions. Word has length 63 [2020-09-21 12:21:29,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:21:29,554 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 142 transitions. [2020-09-21 12:21:29,554 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 12:21:29,554 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 142 transitions. [2020-09-21 12:21:29,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-09-21 12:21:29,556 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:21:29,556 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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] [2020-09-21 12:21:29,556 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-21 12:21:29,557 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:21:29,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:21:29,557 INFO L82 PathProgramCache]: Analyzing trace with hash -2126663367, now seen corresponding path program 1 times [2020-09-21 12:21:29,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:21:29,557 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [115119313] [2020-09-21 12:21:29,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:21:29,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:29,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:29,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:29,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:29,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:30,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:30,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-09-21 12:21:30,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-21 12:21:30,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1015 [2020-09-21 12:21:30,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:30,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 12:21:30,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-21 12:21:30,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-21 12:21:30,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:30,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:21:30,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:30,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:30,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:30,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:21:30,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:30,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:21:30,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:30,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:30,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:30,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:30,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:30,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 12:21:30,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:30,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:30,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:30,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:30,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:30,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:21:30,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:30,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:30,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:30,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:30,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:30,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 12:21:30,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:30,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:30,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:30,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-21 12:21:30,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:30,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-09-21 12:21:30,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:30,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 12:21:30,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 12:21:30,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-21 12:21:30,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:30,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-21 12:21:30,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:30,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:30,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:30,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:30,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:30,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:21:30,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:30,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:30,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-21 12:21:30,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:30,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:30,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-21 12:21:30,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:30,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:30,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:30,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:30,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:30,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:21:30,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:30,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:30,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-21 12:21:30,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:30,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:30,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-09-21 12:21:30,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:30,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:30,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:30,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-21 12:21:30,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:30,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-09-21 12:21:30,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:30,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:30,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-21 12:21:30,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:30,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:30,843 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-21 12:21:30,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [115119313] [2020-09-21 12:21:30,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:21:30,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 12:21:30,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333375865] [2020-09-21 12:21:30,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 12:21:30,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:21:30,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 12:21:30,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-09-21 12:21:30,846 INFO L87 Difference]: Start difference. First operand 108 states and 142 transitions. Second operand 7 states. [2020-09-21 12:21:31,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:21:31,017 INFO L93 Difference]: Finished difference Result 211 states and 299 transitions. [2020-09-21 12:21:31,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 12:21:31,018 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 64 [2020-09-21 12:21:31,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:21:31,020 INFO L225 Difference]: With dead ends: 211 [2020-09-21 12:21:31,020 INFO L226 Difference]: Without dead ends: 134 [2020-09-21 12:21:31,024 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-09-21 12:21:31,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-09-21 12:21:31,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 109. [2020-09-21 12:21:31,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-09-21 12:21:31,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 144 transitions. [2020-09-21 12:21:31,042 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 144 transitions. Word has length 64 [2020-09-21 12:21:31,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:21:31,043 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 144 transitions. [2020-09-21 12:21:31,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 12:21:31,043 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 144 transitions. [2020-09-21 12:21:31,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-09-21 12:21:31,045 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:21:31,045 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:21:31,045 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-21 12:21:31,045 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:21:31,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:21:31,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1100394617, now seen corresponding path program 1 times [2020-09-21 12:21:31,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:21:31,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1002717975] [2020-09-21 12:21:31,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:21:31,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:31,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:31,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:31,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:31,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:32,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:32,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-09-21 12:21:32,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-21 12:21:32,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 999 [2020-09-21 12:21:32,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:32,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 12:21:32,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-21 12:21:32,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-21 12:21:32,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:32,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:21:32,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:32,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:32,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:32,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:21:32,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:32,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:21:32,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:32,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:32,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:32,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:32,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:32,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 12:21:32,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:32,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:32,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:32,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:32,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:32,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:21:32,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:32,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:32,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:32,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:32,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:32,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 12:21:32,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:32,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:32,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:32,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-21 12:21:32,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:32,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-09-21 12:21:32,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:32,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 12:21:32,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 12:21:32,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-21 12:21:32,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:32,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-09-21 12:21:32,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:32,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:32,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:32,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:32,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:32,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 12:21:32,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:32,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:32,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-21 12:21:32,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:32,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:32,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-09-21 12:21:32,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:32,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:32,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:32,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:32,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:32,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:21:32,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:32,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:32,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-21 12:21:32,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:32,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:32,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-09-21 12:21:32,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:32,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:32,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:32,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-21 12:21:32,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:32,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-09-21 12:21:32,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:32,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:32,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-21 12:21:32,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:32,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:32,228 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-21 12:21:32,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1002717975] [2020-09-21 12:21:32,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:21:32,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 12:21:32,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113399463] [2020-09-21 12:21:32,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 12:21:32,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:21:32,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 12:21:32,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-09-21 12:21:32,230 INFO L87 Difference]: Start difference. First operand 109 states and 144 transitions. Second operand 7 states. [2020-09-21 12:21:32,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:21:32,362 INFO L93 Difference]: Finished difference Result 225 states and 316 transitions. [2020-09-21 12:21:32,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 12:21:32,363 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 65 [2020-09-21 12:21:32,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:21:32,364 INFO L225 Difference]: With dead ends: 225 [2020-09-21 12:21:32,364 INFO L226 Difference]: Without dead ends: 142 [2020-09-21 12:21:32,365 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-09-21 12:21:32,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-09-21 12:21:32,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 114. [2020-09-21 12:21:32,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-09-21 12:21:32,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 151 transitions. [2020-09-21 12:21:32,376 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 151 transitions. Word has length 65 [2020-09-21 12:21:32,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:21:32,377 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 151 transitions. [2020-09-21 12:21:32,377 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 12:21:32,377 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 151 transitions. [2020-09-21 12:21:32,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-21 12:21:32,378 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:21:32,379 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:21:32,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-21 12:21:32,379 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:21:32,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:21:32,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1646219128, now seen corresponding path program 2 times [2020-09-21 12:21:32,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:21:32,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1351441394] [2020-09-21 12:21:32,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:21:32,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:32,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:32,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:32,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:32,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:33,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:33,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-09-21 12:21:33,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-21 12:21:33,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1009 [2020-09-21 12:21:33,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:33,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 12:21:33,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-21 12:21:33,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-21 12:21:33,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:33,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:21:33,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:33,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:33,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:33,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:21:33,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:33,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:21:33,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:33,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:33,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:33,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:33,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:33,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 12:21:33,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:33,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:33,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:33,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:33,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:33,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:21:33,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:33,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:33,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:33,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:33,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:33,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 12:21:33,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:33,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:33,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:33,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-21 12:21:33,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:33,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-09-21 12:21:33,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:33,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 12:21:33,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 12:21:33,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-21 12:21:33,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:33,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-21 12:21:33,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:33,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:33,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:33,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:33,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:33,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 12:21:33,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:33,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:33,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-21 12:21:33,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:33,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:33,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-09-21 12:21:33,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:33,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:33,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:33,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:33,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:33,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:21:33,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:33,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:33,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-21 12:21:33,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:33,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:33,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-09-21 12:21:33,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:33,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:33,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:33,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-21 12:21:33,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:33,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-09-21 12:21:33,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:33,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:33,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-21 12:21:33,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:33,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:33,677 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-21 12:21:33,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1351441394] [2020-09-21 12:21:33,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:21:33,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-21 12:21:33,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029856145] [2020-09-21 12:21:33,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 12:21:33,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:21:33,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 12:21:33,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-09-21 12:21:33,680 INFO L87 Difference]: Start difference. First operand 114 states and 151 transitions. Second operand 8 states. [2020-09-21 12:21:33,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:21:33,860 INFO L93 Difference]: Finished difference Result 223 states and 319 transitions. [2020-09-21 12:21:33,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 12:21:33,861 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 67 [2020-09-21 12:21:33,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:21:33,862 INFO L225 Difference]: With dead ends: 223 [2020-09-21 12:21:33,862 INFO L226 Difference]: Without dead ends: 143 [2020-09-21 12:21:33,863 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-09-21 12:21:33,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-09-21 12:21:33,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 115. [2020-09-21 12:21:33,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-09-21 12:21:33,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 153 transitions. [2020-09-21 12:21:33,876 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 153 transitions. Word has length 67 [2020-09-21 12:21:33,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:21:33,876 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 153 transitions. [2020-09-21 12:21:33,876 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 12:21:33,877 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 153 transitions. [2020-09-21 12:21:33,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-09-21 12:21:33,878 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:21:33,878 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:21:33,878 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-21 12:21:33,878 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:21:33,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:21:33,879 INFO L82 PathProgramCache]: Analyzing trace with hash 908474904, now seen corresponding path program 2 times [2020-09-21 12:21:33,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:21:33,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1288384230] [2020-09-21 12:21:33,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:21:33,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:33,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:33,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:34,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:34,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:34,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:34,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-09-21 12:21:34,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-21 12:21:34,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1015 [2020-09-21 12:21:34,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:34,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 12:21:34,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-21 12:21:34,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-21 12:21:34,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:34,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:21:34,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:34,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:34,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:34,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:21:34,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:34,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:21:34,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:34,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:34,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:34,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:34,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:34,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 12:21:34,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:34,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:34,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:34,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:34,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:34,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:21:34,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:34,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:34,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:34,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:34,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:34,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 12:21:34,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:34,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:34,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:34,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-21 12:21:34,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:34,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-09-21 12:21:34,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:34,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 12:21:34,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 12:21:34,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-21 12:21:34,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:35,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-21 12:21:35,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:35,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:35,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:35,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:35,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:35,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:21:35,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:35,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:35,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-21 12:21:35,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:35,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:35,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-09-21 12:21:35,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:35,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:35,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:35,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:35,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:35,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:21:35,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:35,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:35,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-21 12:21:35,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:35,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:35,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-21 12:21:35,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:35,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:35,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:35,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-21 12:21:35,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:35,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-09-21 12:21:35,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:35,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:35,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-21 12:21:35,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:35,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:35,087 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-21 12:21:35,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1288384230] [2020-09-21 12:21:35,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:21:35,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-21 12:21:35,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462663810] [2020-09-21 12:21:35,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 12:21:35,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:21:35,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 12:21:35,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-09-21 12:21:35,095 INFO L87 Difference]: Start difference. First operand 115 states and 153 transitions. Second operand 8 states. [2020-09-21 12:21:35,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:21:35,272 INFO L93 Difference]: Finished difference Result 245 states and 347 transitions. [2020-09-21 12:21:35,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-21 12:21:35,276 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 68 [2020-09-21 12:21:35,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:21:35,277 INFO L225 Difference]: With dead ends: 245 [2020-09-21 12:21:35,278 INFO L226 Difference]: Without dead ends: 159 [2020-09-21 12:21:35,279 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-09-21 12:21:35,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-09-21 12:21:35,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 120. [2020-09-21 12:21:35,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-21 12:21:35,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 160 transitions. [2020-09-21 12:21:35,295 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 160 transitions. Word has length 68 [2020-09-21 12:21:35,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:21:35,296 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 160 transitions. [2020-09-21 12:21:35,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 12:21:35,297 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 160 transitions. [2020-09-21 12:21:35,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-09-21 12:21:35,299 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:21:35,299 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:21:35,299 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-21 12:21:35,300 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:21:35,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:21:35,300 INFO L82 PathProgramCache]: Analyzing trace with hash 437074649, now seen corresponding path program 3 times [2020-09-21 12:21:35,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:21:35,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [116652964] [2020-09-21 12:21:35,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:21:35,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:35,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:35,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:35,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:35,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:36,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:36,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-09-21 12:21:36,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-21 12:21:36,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1011 [2020-09-21 12:21:36,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:36,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 12:21:36,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 60 [2020-09-21 12:21:36,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-21 12:21:36,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:36,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:21:36,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:36,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:36,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:36,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:21:36,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:36,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:21:36,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:36,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:36,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:36,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:36,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:36,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 12:21:36,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:36,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:36,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:36,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:36,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:36,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:21:36,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:36,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:36,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:36,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:36,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:36,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 12:21:36,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:36,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:36,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:36,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:36,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-09-21 12:21:36,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:21:36,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 99 [2020-09-21 12:21:36,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:36,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:36,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:36,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:36,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:36,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-21 12:21:36,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:36,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:36,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:36,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:36,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:36,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:21:36,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:36,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:36,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:36,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:36,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:36,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-21 12:21:36,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:36,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:36,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:36,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:36,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:36,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-21 12:21:36,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:36,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:21:36,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:36,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:21:36,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:36,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-09-21 12:21:36,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:36,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:36,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:36,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-21 12:21:36,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:36,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-09-21 12:21:36,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:36,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:21:36,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 12:21:36,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-21 12:21:36,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:36,681 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-09-21 12:21:36,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [116652964] [2020-09-21 12:21:36,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:21:36,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-21 12:21:36,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219349866] [2020-09-21 12:21:36,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 12:21:36,683 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:21:36,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 12:21:36,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-09-21 12:21:36,684 INFO L87 Difference]: Start difference. First operand 120 states and 160 transitions. Second operand 8 states. [2020-09-21 12:21:36,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:21:36,790 INFO L93 Difference]: Finished difference Result 172 states and 234 transitions. [2020-09-21 12:21:36,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 12:21:36,791 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 70 [2020-09-21 12:21:36,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:21:36,793 INFO L225 Difference]: With dead ends: 172 [2020-09-21 12:21:36,793 INFO L226 Difference]: Without dead ends: 151 [2020-09-21 12:21:36,794 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-09-21 12:21:36,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-09-21 12:21:36,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 135. [2020-09-21 12:21:36,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-09-21 12:21:36,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 182 transitions. [2020-09-21 12:21:36,806 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 182 transitions. Word has length 70 [2020-09-21 12:21:36,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:21:36,807 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 182 transitions. [2020-09-21 12:21:36,807 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 12:21:36,807 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 182 transitions. [2020-09-21 12:21:36,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-09-21 12:21:36,808 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:21:36,808 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 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] [2020-09-21 12:21:36,809 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-21 12:21:36,809 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:21:36,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:21:36,809 INFO L82 PathProgramCache]: Analyzing trace with hash 131427850, now seen corresponding path program 1 times [2020-09-21 12:21:36,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:21:36,810 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1407232634] [2020-09-21 12:21:36,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:21:36,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:36,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:36,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:37,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:37,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:37,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-09-21 12:21:37,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:21:37,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1013 [2020-09-21 12:21:37,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:37,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 12:21:37,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-09-21 12:21:37,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-09-21 12:21:37,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:37,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:21:37,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:37,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:37,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:37,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:21:37,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:37,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:21:37,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:37,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:37,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:37,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:37,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:37,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 12:21:37,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:37,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:37,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:37,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:37,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:37,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:21:37,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:37,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:37,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:37,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:37,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:37,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 12:21:37,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:37,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:37,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:37,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:37,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-09-21 12:21:37,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:21:37,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 92 [2020-09-21 12:21:37,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:37,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:37,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:37,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:37,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:37,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-21 12:21:37,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:37,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:37,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:37,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:37,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:37,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-21 12:21:37,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:37,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:21:37,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:38,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:21:38,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:38,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-21 12:21:38,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:38,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:38,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:38,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-21 12:21:38,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:38,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-21 12:21:38,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:38,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:21:38,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:38,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-21 12:21:38,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:38,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-09-21 12:21:38,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:38,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:38,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:38,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-21 12:21:38,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:38,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 102 [2020-09-21 12:21:38,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:38,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 12:21:38,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 12:21:38,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-21 12:21:38,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:38,255 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-09-21 12:21:38,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1407232634] [2020-09-21 12:21:38,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:21:38,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 12:21:38,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347306282] [2020-09-21 12:21:38,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 12:21:38,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:21:38,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 12:21:38,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-21 12:21:38,259 INFO L87 Difference]: Start difference. First operand 135 states and 182 transitions. Second operand 9 states. [2020-09-21 12:21:38,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:21:38,401 INFO L93 Difference]: Finished difference Result 197 states and 267 transitions. [2020-09-21 12:21:38,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 12:21:38,402 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 74 [2020-09-21 12:21:38,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:21:38,404 INFO L225 Difference]: With dead ends: 197 [2020-09-21 12:21:38,404 INFO L226 Difference]: Without dead ends: 181 [2020-09-21 12:21:38,405 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-09-21 12:21:38,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-09-21 12:21:38,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 161. [2020-09-21 12:21:38,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-09-21 12:21:38,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 225 transitions. [2020-09-21 12:21:38,424 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 225 transitions. Word has length 74 [2020-09-21 12:21:38,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:21:38,424 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 225 transitions. [2020-09-21 12:21:38,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 12:21:38,424 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 225 transitions. [2020-09-21 12:21:38,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-09-21 12:21:38,427 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:21:38,427 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 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] [2020-09-21 12:21:38,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-21 12:21:38,428 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:21:38,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:21:38,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1148435828, now seen corresponding path program 1 times [2020-09-21 12:21:38,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:21:38,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [534888948] [2020-09-21 12:21:38,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:21:38,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:38,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:38,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:38,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:39,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:39,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:39,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-09-21 12:21:39,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-21 12:21:39,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1011 [2020-09-21 12:21:39,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:39,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 12:21:39,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-21 12:21:39,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-21 12:21:39,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:39,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:21:39,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:39,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:39,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:39,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:21:39,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:39,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:21:39,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:39,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:39,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:39,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:39,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:39,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 12:21:39,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:39,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:39,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:39,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:39,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:39,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:21:39,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:39,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:39,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:39,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:39,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:39,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 12:21:39,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:39,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:39,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:39,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-09-21 12:21:39,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:39,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-09-21 12:21:39,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:39,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 12:21:39,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 12:21:39,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-09-21 12:21:39,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:39,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-21 12:21:39,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:39,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:39,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:39,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:39,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:39,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 12:21:39,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:39,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:39,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-21 12:21:39,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:39,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:39,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-21 12:21:39,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:39,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:39,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:39,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-21 12:21:39,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:39,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-21 12:21:39,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:39,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:39,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:21:39,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:39,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:39,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-09-21 12:21:39,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:39,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:39,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:39,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-21 12:21:39,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:39,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-21 12:21:39,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:39,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:39,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-21 12:21:39,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:39,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:39,717 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 39 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-21 12:21:39,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [534888948] [2020-09-21 12:21:39,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:21:39,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 12:21:39,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565053337] [2020-09-21 12:21:39,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 12:21:39,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:21:39,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 12:21:39,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-21 12:21:39,720 INFO L87 Difference]: Start difference. First operand 161 states and 225 transitions. Second operand 9 states. [2020-09-21 12:21:40,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:21:40,109 INFO L93 Difference]: Finished difference Result 335 states and 495 transitions. [2020-09-21 12:21:40,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-21 12:21:40,109 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 74 [2020-09-21 12:21:40,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:21:40,112 INFO L225 Difference]: With dead ends: 335 [2020-09-21 12:21:40,112 INFO L226 Difference]: Without dead ends: 203 [2020-09-21 12:21:40,114 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-21 12:21:40,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-09-21 12:21:40,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 163. [2020-09-21 12:21:40,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-21 12:21:40,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 226 transitions. [2020-09-21 12:21:40,140 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 226 transitions. Word has length 74 [2020-09-21 12:21:40,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:21:40,140 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 226 transitions. [2020-09-21 12:21:40,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 12:21:40,140 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 226 transitions. [2020-09-21 12:21:40,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-09-21 12:21:40,142 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:21:40,142 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 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] [2020-09-21 12:21:40,142 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-21 12:21:40,143 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:21:40,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:21:40,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1591200410, now seen corresponding path program 1 times [2020-09-21 12:21:40,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:21:40,143 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [181605295] [2020-09-21 12:21:40,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:21:40,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:40,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:40,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:40,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:40,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:41,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:41,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-09-21 12:21:41,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-21 12:21:41,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1013 [2020-09-21 12:21:41,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:41,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 12:21:41,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-09-21 12:21:41,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-09-21 12:21:41,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:41,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:21:41,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:41,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:41,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:41,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:21:41,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:41,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:21:41,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:41,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:41,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:41,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:41,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:41,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 12:21:41,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:41,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:41,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:41,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:41,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:41,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:21:41,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:41,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:41,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:41,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:41,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:41,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 12:21:41,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:41,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:41,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:41,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:41,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-21 12:21:41,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:21:41,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-09-21 12:21:41,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:41,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:41,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:41,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:41,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:41,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-21 12:21:41,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:41,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:41,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:41,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:41,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:41,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-21 12:21:41,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:41,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:21:41,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:41,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:21:41,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:41,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-09-21 12:21:41,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:41,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:41,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:41,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-21 12:21:41,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:41,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-21 12:21:41,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:41,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:21:41,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:41,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-21 12:21:41,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:41,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-09-21 12:21:41,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:41,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:41,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:41,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-21 12:21:41,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:41,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 95 [2020-09-21 12:21:41,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:41,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 12:21:41,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 12:21:41,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-21 12:21:41,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:41,571 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2020-09-21 12:21:41,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [181605295] [2020-09-21 12:21:41,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:21:41,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 12:21:41,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016280800] [2020-09-21 12:21:41,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 12:21:41,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:21:41,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 12:21:41,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-21 12:21:41,573 INFO L87 Difference]: Start difference. First operand 163 states and 226 transitions. Second operand 9 states. [2020-09-21 12:21:41,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:21:41,802 INFO L93 Difference]: Finished difference Result 191 states and 256 transitions. [2020-09-21 12:21:41,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-21 12:21:41,803 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 75 [2020-09-21 12:21:41,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:21:41,804 INFO L225 Difference]: With dead ends: 191 [2020-09-21 12:21:41,805 INFO L226 Difference]: Without dead ends: 168 [2020-09-21 12:21:41,806 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-09-21 12:21:41,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-09-21 12:21:41,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 147. [2020-09-21 12:21:41,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-09-21 12:21:41,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 197 transitions. [2020-09-21 12:21:41,835 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 197 transitions. Word has length 75 [2020-09-21 12:21:41,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:21:41,836 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 197 transitions. [2020-09-21 12:21:41,836 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 12:21:41,836 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 197 transitions. [2020-09-21 12:21:41,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-21 12:21:41,839 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:21:41,839 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 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] [2020-09-21 12:21:41,839 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-09-21 12:21:41,839 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:21:41,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:21:41,840 INFO L82 PathProgramCache]: Analyzing trace with hash 2145092423, now seen corresponding path program 1 times [2020-09-21 12:21:41,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:21:41,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1623503285] [2020-09-21 12:21:41,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:21:41,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:41,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:41,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:42,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:42,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:42,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:42,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-09-21 12:21:42,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-21 12:21:42,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1008 [2020-09-21 12:21:42,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:42,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 12:21:42,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 56 [2020-09-21 12:21:42,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-21 12:21:42,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:42,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:21:42,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:42,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:42,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:42,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:21:42,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:42,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:21:42,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:42,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:42,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:42,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:42,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:42,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 12:21:42,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:42,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:42,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:42,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:42,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:42,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:21:42,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:42,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:42,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:42,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:42,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:42,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 12:21:42,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:42,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:42,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:42,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:42,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-21 12:21:42,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:21:42,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-09-21 12:21:42,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:42,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:42,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:42,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:42,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:42,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-21 12:21:42,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:42,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:42,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:42,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-21 12:21:42,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:42,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-21 12:21:42,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:42,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:21:42,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:42,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-21 12:21:42,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:43,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-09-21 12:21:43,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:43,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:43,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:43,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-21 12:21:43,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:43,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-21 12:21:43,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:43,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:21:43,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:43,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-21 12:21:43,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:43,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-09-21 12:21:43,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:43,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:43,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:43,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-21 12:21:43,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:43,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-09-21 12:21:43,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:43,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:21:43,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 12:21:43,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-21 12:21:43,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:43,143 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2020-09-21 12:21:43,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1623503285] [2020-09-21 12:21:43,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:21:43,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-21 12:21:43,144 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300099599] [2020-09-21 12:21:43,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 12:21:43,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:21:43,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 12:21:43,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-09-21 12:21:43,145 INFO L87 Difference]: Start difference. First operand 147 states and 197 transitions. Second operand 8 states. [2020-09-21 12:21:43,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:21:43,233 INFO L93 Difference]: Finished difference Result 209 states and 288 transitions. [2020-09-21 12:21:43,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 12:21:43,233 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 79 [2020-09-21 12:21:43,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:21:43,235 INFO L225 Difference]: With dead ends: 209 [2020-09-21 12:21:43,235 INFO L226 Difference]: Without dead ends: 193 [2020-09-21 12:21:43,236 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-09-21 12:21:43,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-09-21 12:21:43,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 176. [2020-09-21 12:21:43,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-09-21 12:21:43,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 249 transitions. [2020-09-21 12:21:43,254 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 249 transitions. Word has length 79 [2020-09-21 12:21:43,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:21:43,255 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 249 transitions. [2020-09-21 12:21:43,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 12:21:43,255 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 249 transitions. [2020-09-21 12:21:43,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-21 12:21:43,257 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:21:43,257 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 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] [2020-09-21 12:21:43,257 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-09-21 12:21:43,257 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:21:43,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:21:43,258 INFO L82 PathProgramCache]: Analyzing trace with hash 865228745, now seen corresponding path program 2 times [2020-09-21 12:21:43,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:21:43,258 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [618790225] [2020-09-21 12:21:43,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:21:43,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:43,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:43,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:43,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:43,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:44,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:44,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-09-21 12:21:44,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-21 12:21:44,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1003 [2020-09-21 12:21:44,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:44,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 12:21:44,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-21 12:21:44,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-21 12:21:44,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:44,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:21:44,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:44,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:44,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:44,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:21:44,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:44,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:21:44,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:44,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:44,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:44,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:44,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:44,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 12:21:44,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:44,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:44,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:44,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:44,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:44,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:21:44,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:44,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:44,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:44,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:44,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:44,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 12:21:44,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:44,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:44,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:44,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-21 12:21:44,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:44,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-09-21 12:21:44,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:44,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 12:21:44,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 12:21:44,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-21 12:21:44,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:44,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-21 12:21:44,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:44,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:44,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:44,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-21 12:21:44,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:44,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 12:21:44,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:44,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:44,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:21:44,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:44,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:44,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-09-21 12:21:44,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:44,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:44,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:44,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-21 12:21:44,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:44,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-21 12:21:44,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:44,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:44,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:21:44,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:44,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:44,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-09-21 12:21:44,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:44,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:44,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:44,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-21 12:21:44,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:44,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-09-21 12:21:44,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:44,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:44,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-21 12:21:44,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:44,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:44,521 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 4 proven. 50 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-09-21 12:21:44,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [618790225] [2020-09-21 12:21:44,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:21:44,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 12:21:44,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030324936] [2020-09-21 12:21:44,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 12:21:44,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:21:44,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 12:21:44,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2020-09-21 12:21:44,524 INFO L87 Difference]: Start difference. First operand 176 states and 249 transitions. Second operand 9 states. [2020-09-21 12:21:44,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:21:44,641 INFO L93 Difference]: Finished difference Result 355 states and 543 transitions. [2020-09-21 12:21:44,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 12:21:44,642 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 79 [2020-09-21 12:21:44,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:21:44,644 INFO L225 Difference]: With dead ends: 355 [2020-09-21 12:21:44,645 INFO L226 Difference]: Without dead ends: 212 [2020-09-21 12:21:44,646 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=46, Unknown=0, NotChecked=0, Total=90 [2020-09-21 12:21:44,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-09-21 12:21:44,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 180. [2020-09-21 12:21:44,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-09-21 12:21:44,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 254 transitions. [2020-09-21 12:21:44,675 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 254 transitions. Word has length 79 [2020-09-21 12:21:44,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:21:44,676 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 254 transitions. [2020-09-21 12:21:44,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 12:21:44,676 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 254 transitions. [2020-09-21 12:21:44,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-09-21 12:21:44,679 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:21:44,679 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 3, 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] [2020-09-21 12:21:44,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-09-21 12:21:44,680 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:21:44,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:21:44,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1395920842, now seen corresponding path program 2 times [2020-09-21 12:21:44,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:21:44,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [464255457] [2020-09-21 12:21:44,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:21:44,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:44,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:44,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:45,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:45,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:45,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:45,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-09-21 12:21:45,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-21 12:21:45,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1012 [2020-09-21 12:21:45,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:45,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-21 12:21:45,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-21 12:21:45,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-09-21 12:21:45,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:45,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:21:45,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:45,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:45,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:45,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:21:45,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:45,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:21:45,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:45,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:45,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:45,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:45,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:45,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 12:21:45,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:45,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:45,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:45,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:45,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:45,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-21 12:21:45,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:45,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:21:45,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:45,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:21:45,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:45,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 12:21:45,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:45,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:45,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:46,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:46,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-21 12:21:46,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:21:46,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 227 [2020-09-21 12:21:46,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:46,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:21:46,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:46,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-09-21 12:21:46,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:46,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-09-21 12:21:46,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:46,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:46,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:46,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-21 12:21:46,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:46,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-09-21 12:21:46,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:46,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 12:21:46,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:46,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-21 12:21:46,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:46,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-09-21 12:21:46,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:46,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:46,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:46,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-21 12:21:46,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:46,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-21 12:21:46,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:46,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:21:46,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:46,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-21 12:21:46,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:46,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-09-21 12:21:46,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:46,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:46,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:46,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-21 12:21:46,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:46,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-09-21 12:21:46,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:46,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:46,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-21 12:21:46,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:46,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:46,159 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-09-21 12:21:46,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [464255457] [2020-09-21 12:21:46,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:21:46,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-21 12:21:46,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644567242] [2020-09-21 12:21:46,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 12:21:46,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:21:46,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 12:21:46,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-09-21 12:21:46,162 INFO L87 Difference]: Start difference. First operand 180 states and 254 transitions. Second operand 10 states. [2020-09-21 12:21:46,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:21:46,362 INFO L93 Difference]: Finished difference Result 227 states and 307 transitions. [2020-09-21 12:21:46,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 12:21:46,363 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 81 [2020-09-21 12:21:46,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:21:46,366 INFO L225 Difference]: With dead ends: 227 [2020-09-21 12:21:46,366 INFO L226 Difference]: Without dead ends: 176 [2020-09-21 12:21:46,367 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-09-21 12:21:46,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-09-21 12:21:46,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 173. [2020-09-21 12:21:46,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-09-21 12:21:46,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 242 transitions. [2020-09-21 12:21:46,390 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 242 transitions. Word has length 81 [2020-09-21 12:21:46,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:21:46,391 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 242 transitions. [2020-09-21 12:21:46,391 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 12:21:46,391 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 242 transitions. [2020-09-21 12:21:46,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-09-21 12:21:46,394 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:21:46,394 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 3, 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] [2020-09-21 12:21:46,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-09-21 12:21:46,394 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:21:46,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:21:46,395 INFO L82 PathProgramCache]: Analyzing trace with hash -2142751612, now seen corresponding path program 1 times [2020-09-21 12:21:46,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:21:46,396 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1240588615] [2020-09-21 12:21:46,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:21:46,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:46,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:46,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:47,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:47,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-09-21 12:21:47,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:21:47,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1007 [2020-09-21 12:21:47,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:47,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-21 12:21:47,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-21 12:21:47,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-21 12:21:47,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:47,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:21:47,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:47,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:47,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:47,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:21:47,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:47,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:21:47,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:47,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:47,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:47,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:47,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:47,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 12:21:47,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:47,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:47,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:47,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:47,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:47,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:21:47,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:47,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:47,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:47,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:47,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:47,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 12:21:47,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:47,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:47,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:47,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-21 12:21:47,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:47,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-09-21 12:21:47,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:47,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-21 12:21:47,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 12:21:47,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-09-21 12:21:47,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:47,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-09-21 12:21:47,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:47,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:47,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:47,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-21 12:21:47,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:47,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-21 12:21:47,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:47,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:47,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:21:47,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:47,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:47,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-09-21 12:21:47,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:47,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:47,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:47,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-21 12:21:47,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:47,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-21 12:21:47,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:47,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:47,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:21:47,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:47,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:47,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-09-21 12:21:47,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:47,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:47,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:47,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-21 12:21:47,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:47,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-09-21 12:21:47,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:47,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:47,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-21 12:21:47,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:47,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:47,699 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 4 proven. 56 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-09-21 12:21:47,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1240588615] [2020-09-21 12:21:47,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:21:47,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-21 12:21:47,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032495111] [2020-09-21 12:21:47,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 12:21:47,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:21:47,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 12:21:47,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-09-21 12:21:47,701 INFO L87 Difference]: Start difference. First operand 173 states and 242 transitions. Second operand 10 states. [2020-09-21 12:21:48,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:21:48,298 INFO L93 Difference]: Finished difference Result 355 states and 524 transitions. [2020-09-21 12:21:48,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-21 12:21:48,298 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 81 [2020-09-21 12:21:48,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:21:48,301 INFO L225 Difference]: With dead ends: 355 [2020-09-21 12:21:48,301 INFO L226 Difference]: Without dead ends: 216 [2020-09-21 12:21:48,304 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-09-21 12:21:48,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-09-21 12:21:48,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 175. [2020-09-21 12:21:48,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-09-21 12:21:48,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 245 transitions. [2020-09-21 12:21:48,331 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 245 transitions. Word has length 81 [2020-09-21 12:21:48,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:21:48,332 INFO L479 AbstractCegarLoop]: Abstraction has 175 states and 245 transitions. [2020-09-21 12:21:48,332 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 12:21:48,332 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 245 transitions. [2020-09-21 12:21:48,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-09-21 12:21:48,333 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:21:48,334 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 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] [2020-09-21 12:21:48,335 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-09-21 12:21:48,337 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:21:48,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:21:48,337 INFO L82 PathProgramCache]: Analyzing trace with hash 331945300, now seen corresponding path program 1 times [2020-09-21 12:21:48,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:21:48,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2132115324] [2020-09-21 12:21:48,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:21:48,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:48,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:48,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:49,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:49,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-09-21 12:21:49,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:21:49,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1016 [2020-09-21 12:21:49,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:49,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-21 12:21:49,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-21 12:21:49,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-09-21 12:21:49,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:49,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:21:49,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:49,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:49,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:49,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:21:49,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:49,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:21:49,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:49,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:49,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:49,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:49,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:49,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 12:21:49,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:49,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:49,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:49,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:49,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:49,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-21 12:21:49,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:49,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:21:49,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:49,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:21:49,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:49,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 12:21:49,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:49,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:49,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:49,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:49,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-09-21 12:21:49,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:21:49,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 146 [2020-09-21 12:21:49,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:49,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:21:49,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:49,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-21 12:21:49,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:49,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-09-21 12:21:49,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:49,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:49,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:49,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-21 12:21:49,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:49,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-21 12:21:49,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:49,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:21:49,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:49,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-21 12:21:49,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:49,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-21 12:21:49,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:49,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:49,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:49,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-21 12:21:49,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:49,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-21 12:21:49,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:49,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:21:49,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:49,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-21 12:21:49,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:49,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-09-21 12:21:49,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:49,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:49,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:49,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-21 12:21:49,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:49,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 92 [2020-09-21 12:21:49,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:49,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 12:21:49,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 12:21:49,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-21 12:21:49,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:49,877 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2020-09-21 12:21:49,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2132115324] [2020-09-21 12:21:49,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:21:49,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-21 12:21:49,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961092787] [2020-09-21 12:21:49,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 12:21:49,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:21:49,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 12:21:49,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-21 12:21:49,880 INFO L87 Difference]: Start difference. First operand 175 states and 245 transitions. Second operand 10 states. [2020-09-21 12:21:50,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:21:50,151 INFO L93 Difference]: Finished difference Result 188 states and 257 transitions. [2020-09-21 12:21:50,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-21 12:21:50,152 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 82 [2020-09-21 12:21:50,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:21:50,154 INFO L225 Difference]: With dead ends: 188 [2020-09-21 12:21:50,154 INFO L226 Difference]: Without dead ends: 178 [2020-09-21 12:21:50,155 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-09-21 12:21:50,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-09-21 12:21:50,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 175. [2020-09-21 12:21:50,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-09-21 12:21:50,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 244 transitions. [2020-09-21 12:21:50,172 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 244 transitions. Word has length 82 [2020-09-21 12:21:50,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:21:50,172 INFO L479 AbstractCegarLoop]: Abstraction has 175 states and 244 transitions. [2020-09-21 12:21:50,172 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 12:21:50,172 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 244 transitions. [2020-09-21 12:21:50,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-09-21 12:21:50,174 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:21:50,174 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 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] [2020-09-21 12:21:50,174 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-09-21 12:21:50,174 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:21:50,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:21:50,175 INFO L82 PathProgramCache]: Analyzing trace with hash -947918378, now seen corresponding path program 1 times [2020-09-21 12:21:50,175 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:21:50,175 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1004582495] [2020-09-21 12:21:50,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:21:50,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:50,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:50,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:50,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:51,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:51,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-09-21 12:21:51,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:21:51,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1000 [2020-09-21 12:21:51,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:51,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-21 12:21:51,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-21 12:21:51,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-21 12:21:51,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:51,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:21:51,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:51,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:51,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:51,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:21:51,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:51,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:21:51,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:51,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:51,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:51,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:51,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:51,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 12:21:51,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:51,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:51,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:51,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:51,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:51,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:21:51,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:51,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:51,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:51,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:51,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:51,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 12:21:51,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:51,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:51,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:51,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-09-21 12:21:51,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:51,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-09-21 12:21:51,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:51,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-21 12:21:51,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 12:21:51,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-21 12:21:51,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:51,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-09-21 12:21:51,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:51,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:51,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:51,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-21 12:21:51,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:51,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-21 12:21:51,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:51,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:51,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:21:51,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:51,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:51,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-21 12:21:51,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:51,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:51,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:51,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-21 12:21:51,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:51,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 12:21:51,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:51,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:51,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:21:51,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:51,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:51,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-09-21 12:21:51,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:51,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:51,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:51,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-21 12:21:51,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:51,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-21 12:21:51,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:51,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:51,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-21 12:21:51,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:51,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:51,390 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 4 proven. 67 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-09-21 12:21:51,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1004582495] [2020-09-21 12:21:51,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:21:51,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-21 12:21:51,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474236366] [2020-09-21 12:21:51,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 12:21:51,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:21:51,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 12:21:51,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-09-21 12:21:51,392 INFO L87 Difference]: Start difference. First operand 175 states and 244 transitions. Second operand 10 states. [2020-09-21 12:21:51,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:21:51,659 INFO L93 Difference]: Finished difference Result 360 states and 544 transitions. [2020-09-21 12:21:51,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-21 12:21:51,660 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 82 [2020-09-21 12:21:51,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:21:51,662 INFO L225 Difference]: With dead ends: 360 [2020-09-21 12:21:51,663 INFO L226 Difference]: Without dead ends: 221 [2020-09-21 12:21:51,664 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2020-09-21 12:21:51,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-09-21 12:21:51,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 179. [2020-09-21 12:21:51,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-09-21 12:21:51,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 249 transitions. [2020-09-21 12:21:51,684 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 249 transitions. Word has length 82 [2020-09-21 12:21:51,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:21:51,685 INFO L479 AbstractCegarLoop]: Abstraction has 179 states and 249 transitions. [2020-09-21 12:21:51,685 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 12:21:51,685 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 249 transitions. [2020-09-21 12:21:51,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-09-21 12:21:51,687 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:21:51,688 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 4, 4, 4, 3, 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] [2020-09-21 12:21:51,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-09-21 12:21:51,688 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:21:51,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:21:51,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1461800553, now seen corresponding path program 1 times [2020-09-21 12:21:51,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:21:51,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1922887654] [2020-09-21 12:21:51,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:21:51,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:51,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:51,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:52,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:52,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:52,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-09-21 12:21:52,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:21:52,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1003 [2020-09-21 12:21:52,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:52,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-21 12:21:52,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-21 12:21:52,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-09-21 12:21:52,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-09-21 12:21:52,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:21:52,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:52,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:52,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:52,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:21:52,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:52,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:21:52,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:52,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:52,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:52,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:52,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:52,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 12:21:52,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:52,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:52,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:52,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:52,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:52,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 12:21:52,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:52,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:21:52,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:52,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:21:52,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:52,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 12:21:52,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:52,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:52,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:52,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:52,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-21 12:21:52,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:21:52,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 177 [2020-09-21 12:21:52,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:52,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:21:52,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:52,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-21 12:21:52,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:52,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-09-21 12:21:52,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:52,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:52,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:52,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-21 12:21:52,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:52,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-21 12:21:52,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:52,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:21:52,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:52,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-21 12:21:52,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:52,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-09-21 12:21:53,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:53,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:53,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:53,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-21 12:21:53,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:53,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-21 12:21:53,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:53,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:21:53,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:53,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-21 12:21:53,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:53,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-09-21 12:21:53,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:53,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:53,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:53,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-21 12:21:53,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:53,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 88 [2020-09-21 12:21:53,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:53,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 12:21:53,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 12:21:53,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-21 12:21:53,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:53,205 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-09-21 12:21:53,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1922887654] [2020-09-21 12:21:53,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:21:53,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-21 12:21:53,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123136483] [2020-09-21 12:21:53,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 12:21:53,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:21:53,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 12:21:53,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-21 12:21:53,207 INFO L87 Difference]: Start difference. First operand 179 states and 249 transitions. Second operand 10 states. [2020-09-21 12:21:53,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:21:53,499 INFO L93 Difference]: Finished difference Result 186 states and 255 transitions. [2020-09-21 12:21:53,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-21 12:21:53,500 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 84 [2020-09-21 12:21:53,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:21:53,502 INFO L225 Difference]: With dead ends: 186 [2020-09-21 12:21:53,502 INFO L226 Difference]: Without dead ends: 162 [2020-09-21 12:21:53,503 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-09-21 12:21:53,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-09-21 12:21:53,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 157. [2020-09-21 12:21:53,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-09-21 12:21:53,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 214 transitions. [2020-09-21 12:21:53,517 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 214 transitions. Word has length 84 [2020-09-21 12:21:53,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:21:53,518 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 214 transitions. [2020-09-21 12:21:53,518 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 12:21:53,518 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 214 transitions. [2020-09-21 12:21:53,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-09-21 12:21:53,520 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:21:53,520 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 12, 4, 4, 4, 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] [2020-09-21 12:21:53,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-09-21 12:21:53,520 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:21:53,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:21:53,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1151905107, now seen corresponding path program 1 times [2020-09-21 12:21:53,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:21:53,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1926084734] [2020-09-21 12:21:53,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:21:53,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:53,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:53,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:53,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:54,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:54,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-09-21 12:21:54,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:21:54,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1011 [2020-09-21 12:21:54,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:54,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:21:54,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-21 12:21:54,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-21 12:21:54,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:54,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:21:54,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:54,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:54,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:54,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:21:54,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:54,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:21:54,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:54,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:54,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:54,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:54,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:54,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 12:21:54,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:54,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:54,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:54,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:54,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-21 12:21:54,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:21:54,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 214 [2020-09-21 12:21:54,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:54,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:21:54,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 12:21:54,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-21 12:21:54,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:54,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-09-21 12:21:54,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:54,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:54,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:54,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:54,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-21 12:21:54,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:21:54,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 128 [2020-09-21 12:21:54,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:54,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:54,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-09-21 12:21:54,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:54,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:54,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-09-21 12:21:54,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:54,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:54,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:54,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:54,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:54,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:21:54,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:54,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:54,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-21 12:21:54,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:54,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:54,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-09-21 12:21:54,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:54,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:54,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:54,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:54,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:54,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:21:54,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:54,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:54,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-21 12:21:54,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:54,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:54,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-09-21 12:21:54,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:54,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:54,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:54,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-21 12:21:54,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:54,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:21:54,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:54,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:54,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-09-21 12:21:54,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:54,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:55,019 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-09-21 12:21:55,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1926084734] [2020-09-21 12:21:55,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:21:55,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-09-21 12:21:55,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950509009] [2020-09-21 12:21:55,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 12:21:55,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:21:55,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 12:21:55,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:21:55,021 INFO L87 Difference]: Start difference. First operand 157 states and 214 transitions. Second operand 4 states. [2020-09-21 12:21:55,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:21:55,053 INFO L93 Difference]: Finished difference Result 160 states and 216 transitions. [2020-09-21 12:21:55,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 12:21:55,054 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 96 [2020-09-21 12:21:55,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:21:55,055 INFO L225 Difference]: With dead ends: 160 [2020-09-21 12:21:55,055 INFO L226 Difference]: Without dead ends: 0 [2020-09-21 12:21:55,057 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:21:55,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-21 12:21:55,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-21 12:21:55,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-21 12:21:55,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-21 12:21:55,058 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 96 [2020-09-21 12:21:55,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:21:55,058 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-21 12:21:55,059 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 12:21:55,059 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-21 12:21:55,059 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-21 12:21:55,059 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-09-21 12:21:55,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-21 12:21:55,803 WARN L193 SmtUtils]: Spent 729.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 129 [2020-09-21 12:21:56,143 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 59 [2020-09-21 12:21:56,265 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 59