/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.5 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_20-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 14:29:46,166 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 14:29:46,170 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 14:29:46,212 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 14:29:46,212 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 14:29:46,219 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 14:29:46,222 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 14:29:46,225 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 14:29:46,228 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 14:29:46,232 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 14:29:46,233 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 14:29:46,234 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 14:29:46,234 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 14:29:46,235 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 14:29:46,237 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 14:29:46,238 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 14:29:46,239 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 14:29:46,240 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 14:29:46,241 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 14:29:46,243 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 14:29:46,245 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 14:29:46,246 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 14:29:46,247 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 14:29:46,248 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 14:29:46,250 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 14:29:46,250 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 14:29:46,251 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 14:29:46,252 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 14:29:46,252 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 14:29:46,253 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 14:29:46,253 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 14:29:46,254 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 14:29:46,255 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 14:29:46,256 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 14:29:46,257 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 14:29:46,257 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 14:29:46,258 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 14:29:46,258 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 14:29:46,259 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 14:29:46,260 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 14:29:46,260 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 14:29:46,261 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 14:29:46,287 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 14:29:46,287 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 14:29:46,288 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 14:29:46,289 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 14:29:46,289 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 14:29:46,289 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 14:29:46,289 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 14:29:46,290 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 14:29:46,290 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 14:29:46,290 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 14:29:46,290 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 14:29:46,290 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 14:29:46,291 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 14:29:46,291 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 14:29:46,291 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 14:29:46,291 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 14:29:46,292 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 14:29:46,292 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 14:29:46,292 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 14:29:46,292 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 14:29:46,292 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 14:29:46,293 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 14:29:46,293 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 14:29:46,293 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 14:29:46,293 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 14:29:46,294 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 14:29:46,294 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 14:29:46,294 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 14:29:46,294 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 14:29:46,294 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; [2020-09-25 14:29:46,758 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 14:29:46,776 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 14:29:46,780 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 14:29:46,782 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 14:29:46,782 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 14:29:46,783 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_20-1.c [2020-09-25 14:29:46,871 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c865ef841/cff575c0a4ee4654a0c893696ac575b5/FLAG051a3bb9a [2020-09-25 14:29:47,393 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 14:29:47,394 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/fibo_20-1.c [2020-09-25 14:29:47,403 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c865ef841/cff575c0a4ee4654a0c893696ac575b5/FLAG051a3bb9a [2020-09-25 14:29:47,736 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c865ef841/cff575c0a4ee4654a0c893696ac575b5 [2020-09-25 14:29:47,748 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 14:29:47,754 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 14:29:47,755 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 14:29:47,756 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 14:29:47,760 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 14:29:47,761 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:29:47" (1/1) ... [2020-09-25 14:29:47,765 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22f7f464 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:29:47, skipping insertion in model container [2020-09-25 14:29:47,766 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:29:47" (1/1) ... [2020-09-25 14:29:47,774 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 14:29:47,798 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 14:29:48,025 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 14:29:48,030 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 14:29:48,048 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 14:29:48,062 INFO L208 MainTranslator]: Completed translation [2020-09-25 14:29:48,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:29:48 WrapperNode [2020-09-25 14:29:48,063 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 14:29:48,063 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 14:29:48,064 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 14:29:48,064 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 14:29:48,078 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:29:48" (1/1) ... [2020-09-25 14:29:48,078 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:29:48" (1/1) ... [2020-09-25 14:29:48,084 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:29:48" (1/1) ... [2020-09-25 14:29:48,084 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:29:48" (1/1) ... [2020-09-25 14:29:48,091 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:29:48" (1/1) ... [2020-09-25 14:29:48,096 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:29:48" (1/1) ... [2020-09-25 14:29:48,097 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:29:48" (1/1) ... [2020-09-25 14:29:48,099 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 14:29:48,099 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 14:29:48,099 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 14:29:48,099 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 14:29:48,100 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:29:48" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 14:29:48,267 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 14:29:48,267 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 14:29:48,267 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2020-09-25 14:29:48,267 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 14:29:48,268 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 14:29:48,268 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 14:29:48,268 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2020-09-25 14:29:48,268 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 14:29:48,268 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 14:29:48,269 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 14:29:48,493 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 14:29:48,493 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 14:29:48,500 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:29:48 BoogieIcfgContainer [2020-09-25 14:29:48,501 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 14:29:48,502 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 14:29:48,502 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 14:29:48,507 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 14:29:48,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 02:29:47" (1/3) ... [2020-09-25 14:29:48,509 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68dea4f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:29:48, skipping insertion in model container [2020-09-25 14:29:48,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:29:48" (2/3) ... [2020-09-25 14:29:48,510 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68dea4f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:29:48, skipping insertion in model container [2020-09-25 14:29:48,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:29:48" (3/3) ... [2020-09-25 14:29:48,513 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_20-1.c [2020-09-25 14:29:48,529 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 14:29:48,539 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 14:29:48,564 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 14:29:48,597 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 14:29:48,598 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 14:29:48,598 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 14:29:48,598 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 14:29:48,598 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 14:29:48,599 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 14:29:48,599 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 14:29:48,599 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 14:29:48,623 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-09-25 14:29:48,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-25 14:29:48,633 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:29:48,634 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 14:29:48,634 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:29:48,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:29:48,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1756383024, now seen corresponding path program 1 times [2020-09-25 14:29:48,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:29:48,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1880023604] [2020-09-25 14:29:48,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:29:48,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:29:48,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:29:48,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:29:49,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:29:49,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 14:29:49,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 14:29:49,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 235 [2020-09-25 14:29:49,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:29:49,023 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:29:49,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 14:29:49,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-25 14:29:49,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 14:29:49,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 14:29:49,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:29:49,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:29:49,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:29:49,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:29:49,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 14:29:49,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:29:49,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 14:29:49,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:29:49,096 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:29:49,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:29:49,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:29:49,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:29:49,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:29:49,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-25 14:29:49,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:29:49,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:29:49,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:29:49,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 14:29:49,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:29:49,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-25 14:29:49,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:29:49,118 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:29:49,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 14:29:49,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:29:49,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 14:29:49,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:29:49,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 14:29:49,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1880023604] [2020-09-25 14:29:49,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 14:29:49,141 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 14:29:49,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091691] [2020-09-25 14:29:49,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 14:29:49,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:29:49,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 14:29:49,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 14:29:49,169 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 5 states. [2020-09-25 14:29:49,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:29:49,266 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2020-09-25 14:29:49,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 14:29:49,268 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-09-25 14:29:49,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:29:49,281 INFO L225 Difference]: With dead ends: 44 [2020-09-25 14:29:49,281 INFO L226 Difference]: Without dead ends: 28 [2020-09-25 14:29:49,285 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 14:29:49,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-09-25 14:29:49,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-09-25 14:29:49,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-25 14:29:49,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-09-25 14:29:49,339 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 16 [2020-09-25 14:29:49,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:29:49,340 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-09-25 14:29:49,340 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 14:29:49,340 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-09-25 14:29:49,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-25 14:29:49,342 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:29:49,343 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 14:29:49,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 14:29:49,343 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:29:49,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:29:49,344 INFO L82 PathProgramCache]: Analyzing trace with hash -389703589, now seen corresponding path program 1 times [2020-09-25 14:29:49,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:29:49,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [866773756] [2020-09-25 14:29:49,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:29:49,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:29:49,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:29:49,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:29:49,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:29:49,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-25 14:29:49,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 14:29:49,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 163 [2020-09-25 14:29:49,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:29:49,519 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:29:49,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 14:29:49,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 14:29:49,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 14:29:49,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:29:49,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:29:49,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:29:49,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:29:49,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:29:49,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 14:29:49,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:29:49,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 14:29:49,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:29:49,560 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:29:49,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:29:49,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:29:49,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:29:49,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-09-25 14:29:49,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-25 14:29:49,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:29:49,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:29:49,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:29:49,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 14:29:49,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:29:49,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-09-25 14:29:49,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:29:49,626 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:29:49,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 14:29:49,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 14:29:49,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 14:29:49,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:29:49,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 14:29:49,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [866773756] [2020-09-25 14:29:49,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 14:29:49,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 14:29:49,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275228993] [2020-09-25 14:29:49,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 14:29:49,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:29:49,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 14:29:49,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 14:29:49,657 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 5 states. [2020-09-25 14:29:49,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:29:49,715 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2020-09-25 14:29:49,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 14:29:49,716 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-09-25 14:29:49,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:29:49,718 INFO L225 Difference]: With dead ends: 36 [2020-09-25 14:29:49,718 INFO L226 Difference]: Without dead ends: 30 [2020-09-25 14:29:49,719 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 14:29:49,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-09-25 14:29:49,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2020-09-25 14:29:49,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-25 14:29:49,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-09-25 14:29:49,728 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 17 [2020-09-25 14:29:49,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:29:49,728 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-09-25 14:29:49,729 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 14:29:49,729 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-09-25 14:29:49,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-25 14:29:49,731 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:29:49,731 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-25 14:29:49,731 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 14:29:49,732 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:29:49,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:29:49,732 INFO L82 PathProgramCache]: Analyzing trace with hash 50309368, now seen corresponding path program 1 times [2020-09-25 14:29:49,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:29:49,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1739755203] [2020-09-25 14:29:49,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:29:49,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:29:49,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:29:49,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:29:49,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:29:50,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:29:51,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:29:51,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-25 14:29:51,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 14:29:51,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1889 [2020-09-25 14:29:51,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:29:51,637 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:29:51,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 14:29:51,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 14:29:51,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-25 14:29:51,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:29:51,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:29:51,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:29:51,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:29:51,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:29:51,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 14:29:51,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:29:51,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 14:29:51,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:29:51,660 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:29:51,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:29:51,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:29:51,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:29:51,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:29:51,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-25 14:29:51,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:29:51,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:29:51,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:29:51,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:29:51,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:29:51,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-09-25 14:29:51,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 14:29:51,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 203 [2020-09-25 14:29:51,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:29:51,883 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:29:51,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 14:29:51,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 14:29:51,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-25 14:29:51,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:29:51,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-25 14:29:51,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:29:51,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:29:51,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:29:51,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 14:29:51,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:29:51,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-25 14:29:51,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:29:51,927 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:29:51,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 14:29:51,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:29:51,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 14:29:51,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:29:51,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-25 14:29:51,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:29:51,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:29:51,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:29:51,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 14:29:51,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:29:51,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-25 14:29:51,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:29:51,960 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:29:51,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 14:29:51,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:29:51,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 14:29:51,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:29:51,984 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-25 14:29:51,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1739755203] [2020-09-25 14:29:51,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 14:29:51,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-25 14:29:51,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303899601] [2020-09-25 14:29:51,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 14:29:51,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:29:51,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 14:29:51,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-25 14:29:51,988 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 6 states. [2020-09-25 14:29:52,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:29:52,073 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2020-09-25 14:29:52,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 14:29:52,074 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-09-25 14:29:52,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:29:52,076 INFO L225 Difference]: With dead ends: 44 [2020-09-25 14:29:52,076 INFO L226 Difference]: Without dead ends: 38 [2020-09-25 14:29:52,077 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-09-25 14:29:52,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-09-25 14:29:52,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2020-09-25 14:29:52,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-25 14:29:52,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2020-09-25 14:29:52,087 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 33 [2020-09-25 14:29:52,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:29:52,088 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2020-09-25 14:29:52,088 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 14:29:52,088 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2020-09-25 14:29:52,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-25 14:29:52,090 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:29:52,090 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-09-25 14:29:52,091 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 14:29:52,091 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:29:52,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:29:52,091 INFO L82 PathProgramCache]: Analyzing trace with hash 765810174, now seen corresponding path program 1 times [2020-09-25 14:29:52,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:29:52,092 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1543509011] [2020-09-25 14:29:52,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:29:52,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:29:52,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:29:52,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:29:52,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:29:52,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:29:52,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:29:53,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:29:53,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-09-25 14:29:53,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 14:29:53,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1752 [2020-09-25 14:29:53,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:29:53,854 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:29:53,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 14:29:53,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 14:29:53,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-25 14:29:53,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:29:53,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:29:53,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:29:53,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:29:53,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:29:53,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 14:29:53,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:29:53,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 14:29:53,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:29:53,874 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:29:53,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:29:53,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:29:53,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:29:53,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:29:53,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-25 14:29:53,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:29:53,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:29:53,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:29:53,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:29:53,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:29:54,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:29:54,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-25 14:29:54,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 14:29:54,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 467 [2020-09-25 14:29:54,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:29:54,356 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:29:54,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 14:29:54,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 14:29:54,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-25 14:29:54,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:29:54,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-25 14:29:54,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:29:54,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:29:54,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:29:54,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:29:54,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 14:29:54,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 14:29:54,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-09-25 14:29:54,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:29:54,453 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:29:54,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 14:29:54,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:29:54,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 14:29:54,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:29:54,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 14:29:54,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:29:54,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:29:54,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:29:54,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 14:29:54,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:29:54,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-09-25 14:29:54,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:29:54,505 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:29:54,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 14:29:54,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:29:54,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 14:29:54,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:29:54,545 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-25 14:29:54,546 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1543509011] [2020-09-25 14:29:54,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 14:29:54,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 14:29:54,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695206072] [2020-09-25 14:29:54,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 14:29:54,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:29:54,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 14:29:54,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-25 14:29:54,548 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand 7 states. [2020-09-25 14:29:54,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:29:54,653 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2020-09-25 14:29:54,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 14:29:54,654 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2020-09-25 14:29:54,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:29:54,656 INFO L225 Difference]: With dead ends: 58 [2020-09-25 14:29:54,657 INFO L226 Difference]: Without dead ends: 52 [2020-09-25 14:29:54,657 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-09-25 14:29:54,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-09-25 14:29:54,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 36. [2020-09-25 14:29:54,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-25 14:29:54,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2020-09-25 14:29:54,668 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 35 [2020-09-25 14:29:54,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:29:54,669 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2020-09-25 14:29:54,669 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 14:29:54,669 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2020-09-25 14:29:54,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-09-25 14:29:54,672 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:29:54,672 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 14:29:54,673 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 14:29:54,673 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:29:54,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:29:54,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1767822624, now seen corresponding path program 2 times [2020-09-25 14:29:54,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:29:54,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [212409199] [2020-09-25 14:29:54,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:29:54,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:29:54,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:29:54,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:29:54,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:29:54,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:29:54,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:29:55,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:29:55,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:29:55,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:29:59,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:29:59,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-09-25 14:29:59,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 14:29:59,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-09-25 14:29:59,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:29:59,706 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:29:59,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 14:29:59,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 14:29:59,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-09-25 14:29:59,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:29:59,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:29:59,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:29:59,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:29:59,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:29:59,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 14:29:59,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:29:59,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 14:29:59,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:29:59,724 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:29:59,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:29:59,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:29:59,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:29:59,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:29:59,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-25 14:29:59,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:29:59,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:29:59,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:29:59,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:29:59,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:00,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:00,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:00,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:00,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:00,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:01,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:02,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:02,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:02,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:04,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:30:04,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-09-25 14:30:04,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-09-25 14:30:04,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-09-25 14:30:04,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:30:04,742 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:30:04,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 14:30:04,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-09-25 14:30:04,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-09-25 14:30:04,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:30:04,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-25 14:30:04,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:30:04,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:04,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:04,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:30:04,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-09-25 14:30:04,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 14:30:04,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-09-25 14:30:04,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:30:04,810 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:30:04,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 14:30:04,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 14:30:04,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 14:30:04,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:30:04,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-25 14:30:04,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:30:04,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:04,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:30:04,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 14:30:04,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:30:04,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 14:30:04,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:30:04,837 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:30:04,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 14:30:04,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 14:30:04,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 14:30:04,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:30:04,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-25 14:30:04,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:30:04,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:04,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:30:04,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 14:30:04,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:30:04,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 14:30:04,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:30:04,864 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:30:04,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:30:04,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-25 14:30:04,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:30:04,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:30:04,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-09-25 14:30:04,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:30:04,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:04,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:04,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:05,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:05,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:30:05,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-09-25 14:30:05,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 14:30:05,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 757 [2020-09-25 14:30:05,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:30:05,633 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:30:05,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 14:30:05,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-25 14:30:05,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-09-25 14:30:05,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:30:05,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-25 14:30:05,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:30:05,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:05,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:05,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:30:05,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-09-25 14:30:05,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 14:30:05,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 92 [2020-09-25 14:30:05,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:30:05,780 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:30:05,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 14:30:05,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:30:05,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-09-25 14:30:05,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:30:05,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-25 14:30:05,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:30:05,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:05,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:30:05,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 14:30:05,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:30:05,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 14:30:05,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:30:05,890 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:30:05,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 14:30:05,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:30:05,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 14:30:05,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:30:05,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-25 14:30:05,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:30:05,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:05,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:30:05,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 14:30:05,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:30:05,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 14:30:05,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:30:05,908 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:30:05,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 14:30:05,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:30:05,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 14:30:05,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 14:30:05,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-09-25 14:30:05,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:30:05,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:05,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:30:05,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 14:30:05,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:30:05,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 14:30:05,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:30:05,925 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:30:05,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 14:30:05,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 14:30:05,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 14:30:05,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 14:30:05,975 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 74 proven. 45 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2020-09-25 14:30:05,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [212409199] [2020-09-25 14:30:05,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 14:30:05,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 14:30:05,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035319290] [2020-09-25 14:30:05,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 14:30:05,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:30:05,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 14:30:05,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-25 14:30:05,978 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand 11 states. [2020-09-25 14:30:06,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:30:06,192 INFO L93 Difference]: Finished difference Result 74 states and 100 transitions. [2020-09-25 14:30:06,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 14:30:06,193 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 84 [2020-09-25 14:30:06,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:30:06,195 INFO L225 Difference]: With dead ends: 74 [2020-09-25 14:30:06,195 INFO L226 Difference]: Without dead ends: 44 [2020-09-25 14:30:06,196 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-09-25 14:30:06,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-25 14:30:06,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 38. [2020-09-25 14:30:06,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-25 14:30:06,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2020-09-25 14:30:06,214 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 84 [2020-09-25 14:30:06,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:30:06,215 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2020-09-25 14:30:06,215 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 14:30:06,215 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2020-09-25 14:30:06,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-09-25 14:30:06,216 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:30:06,220 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 14:30:06,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 14:30:06,221 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:30:06,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:30:06,221 INFO L82 PathProgramCache]: Analyzing trace with hash 501566307, now seen corresponding path program 1 times [2020-09-25 14:30:06,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:30:06,222 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [591445258] [2020-09-25 14:30:06,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:30:06,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:30:06,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:06,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:06,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:06,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:06,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:06,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:06,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:06,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:09,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:09,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:11,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:30:11,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-09-25 14:30:11,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 14:30:11,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-09-25 14:30:11,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:30:11,238 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:30:11,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 14:30:11,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 14:30:11,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-09-25 14:30:11,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:30:11,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:30:11,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:30:11,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:11,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:30:11,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 14:30:11,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:30:11,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 14:30:11,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:30:11,256 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:30:11,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:30:11,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:30:11,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:30:11,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:30:11,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-25 14:30:11,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:30:11,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:11,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:11,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:11,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:11,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:11,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:11,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:11,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:12,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:12,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:12,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:16,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:30:16,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-09-25 14:30:16,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-09-25 14:30:16,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-25 14:30:16,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:30:16,271 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:30:16,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 14:30:16,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-25 14:30:16,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-09-25 14:30:16,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 14:30:16,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-25 14:30:16,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:30:16,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:16,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:16,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:30:16,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-25 14:30:16,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 14:30:16,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 145 [2020-09-25 14:30:16,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:30:16,437 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:30:16,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 14:30:16,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:30:16,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-25 14:30:16,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 14:30:16,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-25 14:30:16,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:30:16,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:16,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:30:16,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 14:30:16,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:30:16,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 14:30:16,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:30:16,477 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:30:16,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 14:30:16,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:30:16,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 14:30:16,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 14:30:16,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 14:30:16,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:30:16,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:16,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:30:16,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 14:30:16,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:30:16,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 14:30:16,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:30:16,489 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:30:16,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 14:30:16,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:30:16,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 14:30:16,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:30:16,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 14:30:16,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:30:16,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:16,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:16,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:16,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:16,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:16,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:19,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:30:19,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-09-25 14:30:19,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 14:30:19,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2525 [2020-09-25 14:30:19,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:30:19,047 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:30:19,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 14:30:19,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 14:30:19,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-09-25 14:30:19,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 14:30:19,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-25 14:30:19,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:30:19,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:19,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:30:19,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-25 14:30:19,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:30:19,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-25 14:30:19,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:30:19,164 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:30:19,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 14:30:19,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:30:19,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-09-25 14:30:19,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:30:19,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-25 14:30:19,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:30:19,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:19,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:30:19,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 14:30:19,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:30:19,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 14:30:19,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:30:19,177 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:30:19,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:30:19,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:30:19,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:30:19,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:30:19,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 14:30:19,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:30:19,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:19,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:30:19,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 14:30:19,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:30:19,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 14:30:19,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:30:19,185 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:30:19,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:30:19,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:30:19,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:30:19,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:30:19,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 14:30:19,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:30:19,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:19,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:30:19,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 14:30:19,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:30:19,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 14:30:19,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:30:19,198 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:30:19,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 14:30:19,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:30:19,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 14:30:19,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:30:19,215 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 59 proven. 67 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2020-09-25 14:30:19,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [591445258] [2020-09-25 14:30:19,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 14:30:19,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 14:30:19,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858423727] [2020-09-25 14:30:19,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 14:30:19,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:30:19,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 14:30:19,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-09-25 14:30:19,219 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 10 states. [2020-09-25 14:30:19,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:30:19,486 INFO L93 Difference]: Finished difference Result 92 states and 130 transitions. [2020-09-25 14:30:19,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 14:30:19,486 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 87 [2020-09-25 14:30:19,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:30:19,488 INFO L225 Difference]: With dead ends: 92 [2020-09-25 14:30:19,488 INFO L226 Difference]: Without dead ends: 55 [2020-09-25 14:30:19,490 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-09-25 14:30:19,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-25 14:30:19,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2020-09-25 14:30:19,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-25 14:30:19,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2020-09-25 14:30:19,499 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 87 [2020-09-25 14:30:19,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:30:19,500 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2020-09-25 14:30:19,500 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 14:30:19,500 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2020-09-25 14:30:19,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-09-25 14:30:19,501 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:30:19,502 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 14:30:19,502 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 14:30:19,502 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:30:19,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:30:19,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1068467993, now seen corresponding path program 2 times [2020-09-25 14:30:19,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:30:19,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [242756425] [2020-09-25 14:30:19,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:30:19,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:30:19,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:19,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:19,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:19,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:19,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:19,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:20,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:20,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:20,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:21,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:21,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:21,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:24,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:30:24,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-09-25 14:30:24,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-09-25 14:30:24,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-25 14:30:24,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:30:24,513 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:30:24,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 14:30:24,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 14:30:24,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-09-25 14:30:24,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 14:30:24,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:30:24,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:30:24,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:24,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:30:24,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 14:30:24,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:30:24,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 14:30:24,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:30:24,529 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:30:24,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:30:24,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:30:24,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:30:24,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 14:30:24,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-25 14:30:24,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:30:24,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:24,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:24,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:24,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:24,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:24,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:25,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:25,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:25,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:25,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:26,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:26,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:29,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:30:29,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-09-25 14:30:29,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-09-25 14:30:29,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-09-25 14:30:29,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:30:29,544 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:30:29,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 14:30:29,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-25 14:30:29,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-25 14:30:29,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 14:30:29,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-25 14:30:29,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:30:29,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:29,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:29,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:29,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:30:29,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-25 14:30:29,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 14:30:29,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-09-25 14:30:29,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:30:29,691 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:30:29,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 14:30:29,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:30:29,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-09-25 14:30:29,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 14:30:29,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-25 14:30:29,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:30:29,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:29,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:29,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:30:29,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 14:30:29,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 14:30:29,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-09-25 14:30:29,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:30:29,754 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:30:29,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 14:30:29,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:30:29,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 14:30:29,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 14:30:29,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 14:30:29,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:30:29,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:29,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:30:29,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 14:30:29,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:30:29,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-09-25 14:30:29,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:30:29,781 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:30:29,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 14:30:29,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:30:29,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 14:30:29,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:30:29,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-09-25 14:30:29,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:30:29,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:29,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:29,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:29,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:30,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:30,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:30,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:30,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:30,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:30,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:30,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:33,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:30:33,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-09-25 14:30:33,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-09-25 14:30:33,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3662 [2020-09-25 14:30:33,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:30:33,494 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:30:33,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 14:30:33,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 14:30:33,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-09-25 14:30:33,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 14:30:33,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-25 14:30:33,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:30:33,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:33,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:33,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:33,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:30:33,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-25 14:30:33,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 14:30:33,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 198 [2020-09-25 14:30:33,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:30:33,717 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:30:33,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 14:30:33,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:30:33,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-25 14:30:33,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 14:30:33,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-25 14:30:33,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:30:33,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:33,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:30:33,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 14:30:33,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:30:33,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 14:30:33,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:30:33,727 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:30:33,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:30:33,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:30:33,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:30:33,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 14:30:33,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 14:30:33,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:30:33,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:33,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:30:33,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 14:30:33,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:30:33,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 14:30:33,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:30:33,733 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:30:33,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:30:33,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:30:33,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:30:33,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 14:30:33,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-09-25 14:30:33,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:30:33,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:33,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:33,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:30:33,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 14:30:33,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 14:30:33,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-09-25 14:30:33,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:30:33,762 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:30:33,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 14:30:33,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:30:33,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 14:30:33,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 14:30:33,802 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 91 proven. 67 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2020-09-25 14:30:33,803 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [242756425] [2020-09-25 14:30:33,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 14:30:33,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 14:30:33,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130654474] [2020-09-25 14:30:33,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 14:30:33,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:30:33,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 14:30:33,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-09-25 14:30:33,805 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand 10 states. [2020-09-25 14:30:34,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:30:34,046 INFO L93 Difference]: Finished difference Result 102 states and 134 transitions. [2020-09-25 14:30:34,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 14:30:34,047 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 89 [2020-09-25 14:30:34,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:30:34,049 INFO L225 Difference]: With dead ends: 102 [2020-09-25 14:30:34,049 INFO L226 Difference]: Without dead ends: 59 [2020-09-25 14:30:34,050 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-09-25 14:30:34,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-09-25 14:30:34,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 53. [2020-09-25 14:30:34,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-25 14:30:34,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 63 transitions. [2020-09-25 14:30:34,058 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 63 transitions. Word has length 89 [2020-09-25 14:30:34,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:30:34,058 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 63 transitions. [2020-09-25 14:30:34,059 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 14:30:34,059 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 63 transitions. [2020-09-25 14:30:34,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-09-25 14:30:34,060 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:30:34,060 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 14:30:34,061 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 14:30:34,061 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:30:34,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:30:34,061 INFO L82 PathProgramCache]: Analyzing trace with hash -119096809, now seen corresponding path program 2 times [2020-09-25 14:30:34,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:30:34,062 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1534837176] [2020-09-25 14:30:34,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:30:34,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:30:34,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:34,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:34,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:34,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:34,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:34,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:35,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:36,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:36,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:39,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:30:39,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-09-25 14:30:39,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 14:30:39,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-09-25 14:30:39,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:30:39,068 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:30:39,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 14:30:39,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 14:30:39,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-09-25 14:30:39,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 14:30:39,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:30:39,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:30:39,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:39,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:30:39,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 14:30:39,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:30:39,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 14:30:39,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:30:39,079 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:30:39,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:30:39,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:30:39,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:30:39,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 14:30:39,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-25 14:30:39,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:30:39,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:39,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:39,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:39,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:39,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:41,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:30:41,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-09-25 14:30:41,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 14:30:41,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2424 [2020-09-25 14:30:41,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:30:41,509 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:30:41,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 14:30:41,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-25 14:30:41,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-09-25 14:30:41,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 14:30:41,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-25 14:30:41,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:30:41,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:41,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:41,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:41,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:30:41,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-25 14:30:41,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 14:30:41,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-09-25 14:30:41,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:30:41,618 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:30:41,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 14:30:41,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:30:41,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-09-25 14:30:41,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 14:30:41,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-25 14:30:41,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:30:41,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:41,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:30:41,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 14:30:41,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:30:41,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-25 14:30:41,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:30:41,665 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:30:41,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 14:30:41,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:30:41,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 14:30:41,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 14:30:41,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 14:30:41,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:30:41,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:41,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:30:41,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 14:30:41,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:30:41,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 14:30:41,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:30:41,695 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:30:41,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 14:30:41,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:30:41,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 14:30:41,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 14:30:41,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-09-25 14:30:41,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:30:41,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:41,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:41,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:41,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:30:41,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-25 14:30:41,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 14:30:41,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 186 [2020-09-25 14:30:41,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:30:41,888 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:30:41,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 14:30:41,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 14:30:41,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-09-25 14:30:41,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 14:30:41,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-25 14:30:41,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:30:41,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:41,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:30:41,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 14:30:41,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:30:41,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 14:30:41,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:30:41,955 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:30:41,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 14:30:41,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:30:41,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 14:30:41,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 14:30:41,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 14:30:41,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:30:41,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:41,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:30:41,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 14:30:41,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:30:41,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 14:30:41,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:30:41,967 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:30:41,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 14:30:41,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:30:41,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 14:30:41,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 14:30:41,976 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 38 proven. 46 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2020-09-25 14:30:41,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1534837176] [2020-09-25 14:30:41,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 14:30:41,977 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 14:30:41,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409613442] [2020-09-25 14:30:41,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 14:30:41,978 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:30:41,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 14:30:41,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-09-25 14:30:41,978 INFO L87 Difference]: Start difference. First operand 53 states and 63 transitions. Second operand 8 states. [2020-09-25 14:30:42,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:30:42,186 INFO L93 Difference]: Finished difference Result 103 states and 128 transitions. [2020-09-25 14:30:42,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 14:30:42,186 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 70 [2020-09-25 14:30:42,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:30:42,188 INFO L225 Difference]: With dead ends: 103 [2020-09-25 14:30:42,189 INFO L226 Difference]: Without dead ends: 55 [2020-09-25 14:30:42,190 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2020-09-25 14:30:42,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-25 14:30:42,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-09-25 14:30:42,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-25 14:30:42,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2020-09-25 14:30:42,197 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 70 [2020-09-25 14:30:42,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:30:42,197 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2020-09-25 14:30:42,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 14:30:42,197 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2020-09-25 14:30:42,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-09-25 14:30:42,198 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:30:42,199 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 14:30:42,199 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 14:30:42,199 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:30:42,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:30:42,199 INFO L82 PathProgramCache]: Analyzing trace with hash 866676589, now seen corresponding path program 3 times [2020-09-25 14:30:42,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:30:42,200 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [246136833] [2020-09-25 14:30:42,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:30:42,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:30:42,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:42,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:42,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:42,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking...