/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 SequenceOfStatements --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=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/psyco/psyco_abp_1-3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 18:11:50,126 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 18:11:50,128 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 18:11:50,151 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 18:11:50,152 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 18:11:50,153 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 18:11:50,154 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 18:11:50,156 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 18:11:50,158 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 18:11:50,159 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 18:11:50,160 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 18:11:50,161 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 18:11:50,161 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 18:11:50,162 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 18:11:50,166 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 18:11:50,167 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 18:11:50,168 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 18:11:50,169 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 18:11:50,171 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 18:11:50,173 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 18:11:50,174 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 18:11:50,175 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 18:11:50,177 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 18:11:50,177 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 18:11:50,180 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 18:11:50,180 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 18:11:50,180 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 18:11:50,181 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 18:11:50,182 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 18:11:50,183 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 18:11:50,183 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 18:11:50,184 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 18:11:50,184 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 18:11:50,185 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 18:11:50,186 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 18:11:50,186 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 18:11:50,187 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 18:11:50,187 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 18:11:50,187 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 18:11:50,188 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 18:11:50,189 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 18:11:50,190 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 [2020-10-12 18:11:50,212 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 18:11:50,213 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 18:11:50,214 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 18:11:50,214 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 18:11:50,214 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 18:11:50,215 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 18:11:50,215 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 18:11:50,215 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 18:11:50,215 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 18:11:50,215 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 18:11:50,215 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 18:11:50,216 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 18:11:50,216 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 18:11:50,216 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 18:11:50,216 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 18:11:50,216 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 18:11:50,217 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 18:11:50,217 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 18:11:50,217 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 18:11:50,217 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 18:11:50,217 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 18:11:50,218 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 18:11:50,218 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 18:11:50,218 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 18:11:50,218 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 18:11:50,218 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 18:11:50,218 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 18:11:50,219 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 18:11:50,219 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 18:11:50,219 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 -> SequenceOfStatements 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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 18:11:50,492 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 18:11:50,505 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 18:11:50,508 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 18:11:50,510 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 18:11:50,510 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 18:11:50,511 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/psyco/psyco_abp_1-3.c [2020-10-12 18:11:50,583 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0a391bce8/ffaff189e548479b894f7d4d56f31551/FLAGaa3fd378b [2020-10-12 18:11:51,122 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 18:11:51,123 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/psyco/psyco_abp_1-3.c [2020-10-12 18:11:51,135 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0a391bce8/ffaff189e548479b894f7d4d56f31551/FLAGaa3fd378b [2020-10-12 18:11:51,421 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0a391bce8/ffaff189e548479b894f7d4d56f31551 [2020-10-12 18:11:51,432 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 18:11:51,434 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 18:11:51,435 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 18:11:51,435 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 18:11:51,439 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 18:11:51,440 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 06:11:51" (1/1) ... [2020-10-12 18:11:51,444 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cc54d7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:11:51, skipping insertion in model container [2020-10-12 18:11:51,444 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 06:11:51" (1/1) ... [2020-10-12 18:11:51,452 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 18:11:51,488 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 18:11:51,782 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 18:11:51,787 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 18:11:52,039 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 18:11:52,064 INFO L208 MainTranslator]: Completed translation [2020-10-12 18:11:52,064 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:11:52 WrapperNode [2020-10-12 18:11:52,064 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 18:11:52,065 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 18:11:52,065 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 18:11:52,065 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 18:11:52,085 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:11:52" (1/1) ... [2020-10-12 18:11:52,086 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:11:52" (1/1) ... [2020-10-12 18:11:52,102 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:11:52" (1/1) ... [2020-10-12 18:11:52,102 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:11:52" (1/1) ... [2020-10-12 18:11:52,144 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:11:52" (1/1) ... [2020-10-12 18:11:52,162 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:11:52" (1/1) ... [2020-10-12 18:11:52,168 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:11:52" (1/1) ... [2020-10-12 18:11:52,178 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 18:11:52,181 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 18:11:52,181 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 18:11:52,181 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 18:11:52,182 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:11:52" (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 [2020-10-12 18:11:52,253 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 18:11:52,254 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 18:11:52,254 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 18:11:52,254 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 18:11:52,254 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 18:11:52,255 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 18:11:52,256 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 18:11:52,257 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 18:11:53,148 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 18:11:53,148 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-12 18:11:53,154 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 06:11:53 BoogieIcfgContainer [2020-10-12 18:11:53,154 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 18:11:53,155 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 18:11:53,155 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 18:11:53,158 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 18:11:53,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 06:11:51" (1/3) ... [2020-10-12 18:11:53,160 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b86e707 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 06:11:53, skipping insertion in model container [2020-10-12 18:11:53,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:11:52" (2/3) ... [2020-10-12 18:11:53,160 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b86e707 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 06:11:53, skipping insertion in model container [2020-10-12 18:11:53,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 06:11:53" (3/3) ... [2020-10-12 18:11:53,162 INFO L109 eAbstractionObserver]: Analyzing ICFG psyco_abp_1-3.c [2020-10-12 18:11:53,173 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 18:11:53,181 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 18:11:53,195 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 18:11:53,219 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 18:11:53,219 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 18:11:53,219 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 18:11:53,220 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 18:11:53,220 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 18:11:53,220 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 18:11:53,220 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 18:11:53,221 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 18:11:53,242 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states. [2020-10-12 18:11:53,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-12 18:11:53,248 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 18:11:53,249 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 18:11:53,250 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 18:11:53,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 18:11:53,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1483071650, now seen corresponding path program 1 times [2020-10-12 18:11:53,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 18:11:53,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1422952393] [2020-10-12 18:11:53,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 18:11:53,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:11:53,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:11:53,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:11:53,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-12 18:11:53,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:11:53,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-10-12 18:11:53,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:11:53,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 18:11:53,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-12 18:11:53,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 18:11:53,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 18:11:53,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 18:11:53,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:11:53,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:11:53,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:11:53,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 18:11:53,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:11:53,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 18:11:53,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:11:53,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 18:11:53,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:11:53,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 18:11:53,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 18:11:53,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 18:11:53,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1422952393] [2020-10-12 18:11:53,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 18:11:53,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-12 18:11:53,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88941904] [2020-10-12 18:11:53,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-12 18:11:53,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 18:11:53,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-12 18:11:53,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-12 18:11:53,605 INFO L87 Difference]: Start difference. First operand 114 states. Second operand 3 states. [2020-10-12 18:11:53,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 18:11:53,693 INFO L93 Difference]: Finished difference Result 222 states and 422 transitions. [2020-10-12 18:11:53,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-12 18:11:53,695 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-10-12 18:11:53,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 18:11:53,708 INFO L225 Difference]: With dead ends: 222 [2020-10-12 18:11:53,709 INFO L226 Difference]: Without dead ends: 104 [2020-10-12 18:11:53,713 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-12 18:11:53,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-12 18:11:53,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2020-10-12 18:11:53,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-12 18:11:53,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 169 transitions. [2020-10-12 18:11:53,764 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 169 transitions. Word has length 13 [2020-10-12 18:11:53,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 18:11:53,765 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 169 transitions. [2020-10-12 18:11:53,765 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-12 18:11:53,765 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 169 transitions. [2020-10-12 18:11:53,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-12 18:11:53,766 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 18:11:53,767 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 18:11:53,767 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 18:11:53,767 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 18:11:53,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 18:11:53,768 INFO L82 PathProgramCache]: Analyzing trace with hash -736931587, now seen corresponding path program 1 times [2020-10-12 18:11:53,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 18:11:53,768 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1450424805] [2020-10-12 18:11:53,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 18:11:53,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:11:53,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:11:53,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:11:54,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:11:54,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-12 18:11:54,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 18:11:54,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 285 [2020-10-12 18:11:54,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:11:54,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 18:11:54,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 18:11:54,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-12 18:11:54,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 18:11:54,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 18:11:54,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:11:54,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:11:54,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:11:54,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 18:11:54,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:11:54,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 18:11:54,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:11:54,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 18:11:54,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:11:54,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 18:11:54,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 18:11:54,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 18:11:54,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1450424805] [2020-10-12 18:11:54,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 18:11:54,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 18:11:54,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065913295] [2020-10-12 18:11:54,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 18:11:54,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 18:11:54,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 18:11:54,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 18:11:54,151 INFO L87 Difference]: Start difference. First operand 104 states and 169 transitions. Second operand 4 states. [2020-10-12 18:11:54,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 18:11:54,602 INFO L93 Difference]: Finished difference Result 205 states and 336 transitions. [2020-10-12 18:11:54,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 18:11:54,602 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-12 18:11:54,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 18:11:54,604 INFO L225 Difference]: With dead ends: 205 [2020-10-12 18:11:54,604 INFO L226 Difference]: Without dead ends: 107 [2020-10-12 18:11:54,606 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 18:11:54,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-12 18:11:54,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2020-10-12 18:11:54,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-12 18:11:54,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 172 transitions. [2020-10-12 18:11:54,619 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 172 transitions. Word has length 14 [2020-10-12 18:11:54,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 18:11:54,619 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 172 transitions. [2020-10-12 18:11:54,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 18:11:54,620 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 172 transitions. [2020-10-12 18:11:54,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-12 18:11:54,621 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 18:11:54,621 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 18:11:54,621 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 18:11:54,621 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 18:11:54,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 18:11:54,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1504395429, now seen corresponding path program 1 times [2020-10-12 18:11:54,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 18:11:54,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1334335620] [2020-10-12 18:11:54,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 18:11:54,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:11:54,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:11:54,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:11:54,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-12 18:11:54,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:11:54,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 175 [2020-10-12 18:11:54,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:11:54,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 18:11:54,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-12 18:11:54,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 18:11:54,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 18:11:54,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 18:11:54,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:11:54,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:11:54,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:11:54,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 18:11:54,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:11:54,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 18:11:54,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:11:54,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 18:11:54,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:11:54,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 18:11:54,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 18:11:55,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 18:11:55,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1334335620] [2020-10-12 18:11:55,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 18:11:55,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 18:11:55,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357765818] [2020-10-12 18:11:55,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 18:11:55,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 18:11:55,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 18:11:55,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 18:11:55,003 INFO L87 Difference]: Start difference. First operand 107 states and 172 transitions. Second operand 4 states. [2020-10-12 18:11:55,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 18:11:55,546 INFO L93 Difference]: Finished difference Result 209 states and 338 transitions. [2020-10-12 18:11:55,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 18:11:55,547 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-12 18:11:55,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 18:11:55,549 INFO L225 Difference]: With dead ends: 209 [2020-10-12 18:11:55,549 INFO L226 Difference]: Without dead ends: 190 [2020-10-12 18:11:55,550 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 18:11:55,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-12 18:11:55,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 176. [2020-10-12 18:11:55,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-10-12 18:11:55,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 285 transitions. [2020-10-12 18:11:55,566 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 285 transitions. Word has length 19 [2020-10-12 18:11:55,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 18:11:55,567 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 285 transitions. [2020-10-12 18:11:55,567 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 18:11:55,567 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 285 transitions. [2020-10-12 18:11:55,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-12 18:11:55,568 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 18:11:55,568 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 18:11:55,569 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 18:11:55,569 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 18:11:55,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 18:11:55,569 INFO L82 PathProgramCache]: Analyzing trace with hash 2142865338, now seen corresponding path program 1 times [2020-10-12 18:11:55,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 18:11:55,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [457277835] [2020-10-12 18:11:55,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 18:11:55,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:11:55,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:11:55,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:11:55,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:11:55,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-12 18:11:55,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 18:11:55,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-10-12 18:11:55,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:11:55,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 18:11:55,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-12 18:11:55,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-12 18:11:55,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:11:55,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 18:11:55,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:11:55,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:11:55,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:11:55,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 18:11:55,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:11:55,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 18:11:55,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:11:55,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 18:11:55,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:11:55,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 18:11:55,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:11:55,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 18:11:55,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [457277835] [2020-10-12 18:11:55,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 18:11:55,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 18:11:55,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52721604] [2020-10-12 18:11:55,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 18:11:55,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 18:11:55,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 18:11:55,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 18:11:55,679 INFO L87 Difference]: Start difference. First operand 176 states and 285 transitions. Second operand 4 states. [2020-10-12 18:11:55,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 18:11:55,976 INFO L93 Difference]: Finished difference Result 297 states and 481 transitions. [2020-10-12 18:11:55,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 18:11:55,976 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-12 18:11:55,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 18:11:55,978 INFO L225 Difference]: With dead ends: 297 [2020-10-12 18:11:55,978 INFO L226 Difference]: Without dead ends: 128 [2020-10-12 18:11:55,981 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 18:11:55,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-12 18:11:55,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2020-10-12 18:11:55,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-12 18:11:56,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 198 transitions. [2020-10-12 18:11:56,001 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 198 transitions. Word has length 20 [2020-10-12 18:11:56,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 18:11:56,001 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 198 transitions. [2020-10-12 18:11:56,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 18:11:56,001 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 198 transitions. [2020-10-12 18:11:56,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-12 18:11:56,002 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 18:11:56,003 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 18:11:56,003 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 18:11:56,003 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 18:11:56,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 18:11:56,004 INFO L82 PathProgramCache]: Analyzing trace with hash -2011475352, now seen corresponding path program 1 times [2020-10-12 18:11:56,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 18:11:56,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1102945558] [2020-10-12 18:11:56,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 18:11:56,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:11:56,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:11:56,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:11:56,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-12 18:11:56,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:11:56,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-10-12 18:11:56,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:11:56,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 18:11:56,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-12 18:11:56,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-12 18:11:56,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:11:56,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 18:11:56,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:11:56,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:11:56,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:11:56,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 18:11:56,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:11:56,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 18:11:56,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:11:56,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 18:11:56,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:11:56,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 18:11:56,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:11:56,139 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 18:11:56,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1102945558] [2020-10-12 18:11:56,140 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 18:11:56,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 18:11:56,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178446584] [2020-10-12 18:11:56,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 18:11:56,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 18:11:56,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 18:11:56,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 18:11:56,141 INFO L87 Difference]: Start difference. First operand 126 states and 198 transitions. Second operand 4 states. [2020-10-12 18:11:56,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 18:11:56,254 INFO L93 Difference]: Finished difference Result 230 states and 362 transitions. [2020-10-12 18:11:56,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 18:11:56,255 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-12 18:11:56,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 18:11:56,256 INFO L225 Difference]: With dead ends: 230 [2020-10-12 18:11:56,256 INFO L226 Difference]: Without dead ends: 111 [2020-10-12 18:11:56,257 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 18:11:56,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-12 18:11:56,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 109. [2020-10-12 18:11:56,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-12 18:11:56,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 167 transitions. [2020-10-12 18:11:56,267 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 167 transitions. Word has length 25 [2020-10-12 18:11:56,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 18:11:56,268 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 167 transitions. [2020-10-12 18:11:56,268 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 18:11:56,268 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 167 transitions. [2020-10-12 18:11:56,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-12 18:11:56,269 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 18:11:56,269 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 18:11:56,270 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 18:11:56,270 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 18:11:56,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 18:11:56,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1818456969, now seen corresponding path program 1 times [2020-10-12 18:11:56,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 18:11:56,271 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2144581392] [2020-10-12 18:11:56,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 18:11:56,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:11:56,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:11:56,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:11:56,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:11:56,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-12 18:11:56,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 18:11:56,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 295 [2020-10-12 18:11:56,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:11:56,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 18:11:56,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-12 18:11:56,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 18:11:56,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 18:11:56,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 18:11:56,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:11:56,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:11:56,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:11:56,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 18:11:56,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:11:56,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 18:11:56,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:11:56,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 18:11:56,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:11:56,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 18:11:56,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 18:11:56,717 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 18:11:56,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2144581392] [2020-10-12 18:11:56,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 18:11:56,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-12 18:11:56,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489974482] [2020-10-12 18:11:56,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 18:11:56,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 18:11:56,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 18:11:56,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 18:11:56,721 INFO L87 Difference]: Start difference. First operand 109 states and 167 transitions. Second operand 5 states. [2020-10-12 18:11:57,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 18:11:57,354 INFO L93 Difference]: Finished difference Result 192 states and 299 transitions. [2020-10-12 18:11:57,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 18:11:57,354 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-10-12 18:11:57,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 18:11:57,357 INFO L225 Difference]: With dead ends: 192 [2020-10-12 18:11:57,358 INFO L226 Difference]: Without dead ends: 174 [2020-10-12 18:11:57,358 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-12 18:11:57,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-12 18:11:57,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 172. [2020-10-12 18:11:57,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-12 18:11:57,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 265 transitions. [2020-10-12 18:11:57,377 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 265 transitions. Word has length 27 [2020-10-12 18:11:57,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 18:11:57,377 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 265 transitions. [2020-10-12 18:11:57,377 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 18:11:57,378 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 265 transitions. [2020-10-12 18:11:57,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 18:11:57,379 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 18:11:57,380 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 18:11:57,380 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 18:11:57,382 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 18:11:57,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 18:11:57,383 INFO L82 PathProgramCache]: Analyzing trace with hash 549034740, now seen corresponding path program 1 times [2020-10-12 18:11:57,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 18:11:57,383 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1424011913] [2020-10-12 18:11:57,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 18:11:57,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:11:57,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:11:57,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:11:57,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:11:57,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 18:11:57,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 18:11:57,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 322 [2020-10-12 18:11:57,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:11:57,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 18:11:57,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-12 18:11:57,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 18:11:57,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:11:57,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 18:11:57,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:11:57,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:11:57,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:11:57,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 18:11:57,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:11:57,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 18:11:57,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:11:57,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 18:11:57,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:11:57,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 18:11:57,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:11:57,895 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 18:11:57,895 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1424011913] [2020-10-12 18:11:57,895 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 18:11:57,895 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-12 18:11:57,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771779845] [2020-10-12 18:11:57,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 18:11:57,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 18:11:57,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 18:11:57,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 18:11:57,897 INFO L87 Difference]: Start difference. First operand 172 states and 265 transitions. Second operand 5 states. [2020-10-12 18:11:58,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 18:11:58,477 INFO L93 Difference]: Finished difference Result 230 states and 355 transitions. [2020-10-12 18:11:58,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 18:11:58,477 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-10-12 18:11:58,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 18:11:58,479 INFO L225 Difference]: With dead ends: 230 [2020-10-12 18:11:58,479 INFO L226 Difference]: Without dead ends: 226 [2020-10-12 18:11:58,480 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-12 18:11:58,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-10-12 18:11:58,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 217. [2020-10-12 18:11:58,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-10-12 18:11:58,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 339 transitions. [2020-10-12 18:11:58,490 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 339 transitions. Word has length 28 [2020-10-12 18:11:58,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 18:11:58,491 INFO L479 AbstractCegarLoop]: Abstraction has 217 states and 339 transitions. [2020-10-12 18:11:58,491 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 18:11:58,491 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 339 transitions. [2020-10-12 18:11:58,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-12 18:11:58,492 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 18:11:58,492 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 18:11:58,492 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 18:11:58,493 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 18:11:58,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 18:11:58,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1113591962, now seen corresponding path program 1 times [2020-10-12 18:11:58,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 18:11:58,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1076475175] [2020-10-12 18:11:58,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 18:11:58,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:11:58,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:11:58,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:11:58,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:11:58,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-12 18:11:58,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 18:11:58,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 74 [2020-10-12 18:11:58,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:11:58,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 18:11:58,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-12 18:11:58,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 18:11:58,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:11:58,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 18:11:58,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:11:58,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:11:58,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:11:58,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 18:11:58,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:11:58,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 18:11:58,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:11:58,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 18:11:58,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:11:58,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 18:11:58,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:11:58,620 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 18:11:58,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1076475175] [2020-10-12 18:11:58,621 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 18:11:58,621 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 18:11:58,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837848948] [2020-10-12 18:11:58,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 18:11:58,622 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 18:11:58,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 18:11:58,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 18:11:58,622 INFO L87 Difference]: Start difference. First operand 217 states and 339 transitions. Second operand 4 states. [2020-10-12 18:11:58,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 18:11:58,814 INFO L93 Difference]: Finished difference Result 400 states and 623 transitions. [2020-10-12 18:11:58,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 18:11:58,815 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-12 18:11:58,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 18:11:58,817 INFO L225 Difference]: With dead ends: 400 [2020-10-12 18:11:58,817 INFO L226 Difference]: Without dead ends: 211 [2020-10-12 18:11:58,818 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 18:11:58,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-10-12 18:11:58,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 209. [2020-10-12 18:11:58,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-10-12 18:11:58,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 313 transitions. [2020-10-12 18:11:58,829 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 313 transitions. Word has length 29 [2020-10-12 18:11:58,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 18:11:58,829 INFO L479 AbstractCegarLoop]: Abstraction has 209 states and 313 transitions. [2020-10-12 18:11:58,829 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 18:11:58,829 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 313 transitions. [2020-10-12 18:11:58,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-12 18:11:58,830 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 18:11:58,830 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 18:11:58,830 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 18:11:58,831 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 18:11:58,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 18:11:58,831 INFO L82 PathProgramCache]: Analyzing trace with hash 454582667, now seen corresponding path program 1 times [2020-10-12 18:11:58,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 18:11:58,832 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [482173910] [2020-10-12 18:11:58,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 18:11:58,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:11:58,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:11:58,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:11:58,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-12 18:11:58,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:11:58,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 90 [2020-10-12 18:11:58,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:11:58,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 18:11:58,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-12 18:11:58,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 18:11:58,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:11:58,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 18:11:58,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:11:59,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:11:59,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:11:59,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 18:11:59,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:11:59,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 18:11:59,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:11:59,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 18:11:59,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:11:59,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 18:11:59,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:11:59,006 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-12 18:11:59,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [482173910] [2020-10-12 18:11:59,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 18:11:59,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 18:11:59,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910657849] [2020-10-12 18:11:59,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 18:11:59,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 18:11:59,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 18:11:59,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 18:11:59,009 INFO L87 Difference]: Start difference. First operand 209 states and 313 transitions. Second operand 4 states. [2020-10-12 18:11:59,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 18:11:59,048 INFO L93 Difference]: Finished difference Result 212 states and 315 transitions. [2020-10-12 18:11:59,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 18:11:59,048 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-10-12 18:11:59,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 18:11:59,050 INFO L225 Difference]: With dead ends: 212 [2020-10-12 18:11:59,050 INFO L226 Difference]: Without dead ends: 206 [2020-10-12 18:11:59,050 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 18:11:59,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-12 18:11:59,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 205. [2020-10-12 18:11:59,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-10-12 18:11:59,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 304 transitions. [2020-10-12 18:11:59,060 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 304 transitions. Word has length 31 [2020-10-12 18:11:59,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 18:11:59,060 INFO L479 AbstractCegarLoop]: Abstraction has 205 states and 304 transitions. [2020-10-12 18:11:59,061 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 18:11:59,061 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 304 transitions. [2020-10-12 18:11:59,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-12 18:11:59,062 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 18:11:59,062 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 18:11:59,062 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 18:11:59,062 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 18:11:59,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 18:11:59,063 INFO L82 PathProgramCache]: Analyzing trace with hash 362155736, now seen corresponding path program 1 times [2020-10-12 18:11:59,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 18:11:59,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2055712964] [2020-10-12 18:11:59,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 18:11:59,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:11:59,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:11:59,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:11:59,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:11:59,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:11:59,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-12 18:11:59,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 18:11:59,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 655 [2020-10-12 18:11:59,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:11:59,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 18:11:59,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-12 18:11:59,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 18:11:59,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:11:59,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 18:11:59,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:11:59,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:11:59,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:11:59,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 18:11:59,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:11:59,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 18:11:59,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:11:59,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 18:11:59,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:11:59,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 18:11:59,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:11:59,818 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 18:11:59,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2055712964] [2020-10-12 18:11:59,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 18:11:59,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 18:11:59,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382989855] [2020-10-12 18:11:59,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 18:11:59,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 18:11:59,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 18:11:59,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-12 18:11:59,821 INFO L87 Difference]: Start difference. First operand 205 states and 304 transitions. Second operand 6 states. [2020-10-12 18:12:00,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 18:12:00,618 INFO L93 Difference]: Finished difference Result 365 states and 545 transitions. [2020-10-12 18:12:00,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 18:12:00,619 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 36 [2020-10-12 18:12:00,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 18:12:00,622 INFO L225 Difference]: With dead ends: 365 [2020-10-12 18:12:00,622 INFO L226 Difference]: Without dead ends: 357 [2020-10-12 18:12:00,623 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-12 18:12:00,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2020-10-12 18:12:00,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 327. [2020-10-12 18:12:00,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 327 states. [2020-10-12 18:12:00,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 491 transitions. [2020-10-12 18:12:00,637 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 491 transitions. Word has length 36 [2020-10-12 18:12:00,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 18:12:00,637 INFO L479 AbstractCegarLoop]: Abstraction has 327 states and 491 transitions. [2020-10-12 18:12:00,637 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 18:12:00,637 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 491 transitions. [2020-10-12 18:12:00,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 18:12:00,640 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 18:12:00,640 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 18:12:00,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 18:12:00,641 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 18:12:00,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 18:12:00,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1646630523, now seen corresponding path program 1 times [2020-10-12 18:12:00,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 18:12:00,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1350257978] [2020-10-12 18:12:00,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 18:12:00,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:12:00,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:12:00,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:12:00,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-12 18:12:00,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:12:00,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 106 [2020-10-12 18:12:00,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:12:00,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 18:12:00,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-12 18:12:00,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 18:12:00,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:12:00,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 18:12:00,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:12:00,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:12:00,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:12:00,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 18:12:00,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:12:00,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 18:12:00,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:12:00,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 18:12:00,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:12:00,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 18:12:00,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:12:00,822 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-12 18:12:00,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1350257978] [2020-10-12 18:12:00,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 18:12:00,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 18:12:00,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345762434] [2020-10-12 18:12:00,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 18:12:00,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 18:12:00,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 18:12:00,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 18:12:00,825 INFO L87 Difference]: Start difference. First operand 327 states and 491 transitions. Second operand 4 states. [2020-10-12 18:12:00,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 18:12:00,994 INFO L93 Difference]: Finished difference Result 533 states and 806 transitions. [2020-10-12 18:12:00,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 18:12:00,994 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 37 [2020-10-12 18:12:00,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 18:12:00,996 INFO L225 Difference]: With dead ends: 533 [2020-10-12 18:12:00,996 INFO L226 Difference]: Without dead ends: 255 [2020-10-12 18:12:00,997 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 18:12:00,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-10-12 18:12:01,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 253. [2020-10-12 18:12:01,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-10-12 18:12:01,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 376 transitions. [2020-10-12 18:12:01,008 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 376 transitions. Word has length 37 [2020-10-12 18:12:01,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 18:12:01,009 INFO L479 AbstractCegarLoop]: Abstraction has 253 states and 376 transitions. [2020-10-12 18:12:01,009 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 18:12:01,009 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 376 transitions. [2020-10-12 18:12:01,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-12 18:12:01,010 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 18:12:01,010 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 18:12:01,010 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 18:12:01,010 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 18:12:01,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 18:12:01,011 INFO L82 PathProgramCache]: Analyzing trace with hash 939353414, now seen corresponding path program 1 times [2020-10-12 18:12:01,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 18:12:01,011 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [721606051] [2020-10-12 18:12:01,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 18:12:01,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:12:01,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:12:01,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:12:01,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:12:01,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 18:12:01,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 18:12:01,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 710 [2020-10-12 18:12:01,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:12:01,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 18:12:01,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-12 18:12:01,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 18:12:01,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:12:01,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 18:12:01,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:12:01,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:12:01,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:12:01,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 18:12:01,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:12:01,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 18:12:01,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:12:01,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 18:12:01,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:12:01,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 18:12:01,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:12:01,977 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 18:12:01,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [721606051] [2020-10-12 18:12:01,978 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 18:12:01,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 18:12:01,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585244265] [2020-10-12 18:12:01,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 18:12:01,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 18:12:01,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 18:12:01,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 18:12:01,980 INFO L87 Difference]: Start difference. First operand 253 states and 376 transitions. Second operand 6 states. [2020-10-12 18:12:02,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 18:12:02,971 INFO L93 Difference]: Finished difference Result 530 states and 792 transitions. [2020-10-12 18:12:02,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 18:12:02,972 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 40 [2020-10-12 18:12:02,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 18:12:02,974 INFO L225 Difference]: With dead ends: 530 [2020-10-12 18:12:02,975 INFO L226 Difference]: Without dead ends: 364 [2020-10-12 18:12:02,976 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-12 18:12:02,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2020-10-12 18:12:02,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 280. [2020-10-12 18:12:02,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-10-12 18:12:02,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 414 transitions. [2020-10-12 18:12:02,991 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 414 transitions. Word has length 40 [2020-10-12 18:12:02,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 18:12:02,991 INFO L479 AbstractCegarLoop]: Abstraction has 280 states and 414 transitions. [2020-10-12 18:12:02,991 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 18:12:02,991 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 414 transitions. [2020-10-12 18:12:02,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-12 18:12:02,992 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 18:12:02,992 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 18:12:02,992 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 18:12:02,993 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 18:12:02,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 18:12:02,993 INFO L82 PathProgramCache]: Analyzing trace with hash -819577482, now seen corresponding path program 1 times [2020-10-12 18:12:02,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 18:12:02,994 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [378564834] [2020-10-12 18:12:02,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 18:12:03,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:12:03,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:12:03,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:12:03,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:12:03,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-12 18:12:03,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 18:12:03,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 150 [2020-10-12 18:12:03,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:12:03,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 18:12:03,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-12 18:12:03,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 18:12:03,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:12:03,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 18:12:03,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:12:03,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:12:03,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:12:03,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 18:12:03,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:12:03,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 18:12:03,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:12:03,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 18:12:03,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:12:03,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 18:12:03,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:12:03,216 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-12 18:12:03,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [378564834] [2020-10-12 18:12:03,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 18:12:03,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 18:12:03,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436754027] [2020-10-12 18:12:03,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 18:12:03,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 18:12:03,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 18:12:03,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 18:12:03,218 INFO L87 Difference]: Start difference. First operand 280 states and 414 transitions. Second operand 4 states. [2020-10-12 18:12:03,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 18:12:03,412 INFO L93 Difference]: Finished difference Result 485 states and 712 transitions. [2020-10-12 18:12:03,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 18:12:03,413 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2020-10-12 18:12:03,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 18:12:03,414 INFO L225 Difference]: With dead ends: 485 [2020-10-12 18:12:03,415 INFO L226 Difference]: Without dead ends: 233 [2020-10-12 18:12:03,416 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 18:12:03,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-12 18:12:03,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 231. [2020-10-12 18:12:03,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-10-12 18:12:03,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 329 transitions. [2020-10-12 18:12:03,428 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 329 transitions. Word has length 41 [2020-10-12 18:12:03,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 18:12:03,428 INFO L479 AbstractCegarLoop]: Abstraction has 231 states and 329 transitions. [2020-10-12 18:12:03,428 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 18:12:03,428 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 329 transitions. [2020-10-12 18:12:03,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-12 18:12:03,429 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 18:12:03,429 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 18:12:03,430 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 18:12:03,430 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 18:12:03,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 18:12:03,430 INFO L82 PathProgramCache]: Analyzing trace with hash 711556807, now seen corresponding path program 1 times [2020-10-12 18:12:03,430 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 18:12:03,431 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1076764784] [2020-10-12 18:12:03,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 18:12:03,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:12:03,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:12:03,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:12:03,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:12:04,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:12:04,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-12 18:12:04,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 18:12:04,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1012 [2020-10-12 18:12:04,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:12:04,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 18:12:04,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-12 18:12:04,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 18:12:04,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:12:04,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 18:12:04,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:12:04,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:12:04,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:12:04,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 18:12:04,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:12:04,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 18:12:04,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:12:04,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 18:12:04,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:12:04,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 18:12:04,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:12:04,559 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-12 18:12:04,560 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1076764784] [2020-10-12 18:12:04,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 18:12:04,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 18:12:04,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43007427] [2020-10-12 18:12:04,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 18:12:04,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 18:12:04,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 18:12:04,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-12 18:12:04,561 INFO L87 Difference]: Start difference. First operand 231 states and 329 transitions. Second operand 6 states. [2020-10-12 18:12:05,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 18:12:05,261 INFO L93 Difference]: Finished difference Result 335 states and 476 transitions. [2020-10-12 18:12:05,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 18:12:05,262 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 50 [2020-10-12 18:12:05,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 18:12:05,264 INFO L225 Difference]: With dead ends: 335 [2020-10-12 18:12:05,264 INFO L226 Difference]: Without dead ends: 330 [2020-10-12 18:12:05,265 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-12 18:12:05,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-10-12 18:12:05,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 325. [2020-10-12 18:12:05,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2020-10-12 18:12:05,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 463 transitions. [2020-10-12 18:12:05,279 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 463 transitions. Word has length 50 [2020-10-12 18:12:05,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 18:12:05,279 INFO L479 AbstractCegarLoop]: Abstraction has 325 states and 463 transitions. [2020-10-12 18:12:05,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 18:12:05,280 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 463 transitions. [2020-10-12 18:12:05,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-12 18:12:05,280 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 18:12:05,280 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 18:12:05,281 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 18:12:05,281 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 18:12:05,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 18:12:05,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1272595608, now seen corresponding path program 1 times [2020-10-12 18:12:05,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 18:12:05,282 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1059552013] [2020-10-12 18:12:05,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 18:12:05,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:12:05,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:12:05,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:12:05,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-12 18:12:05,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:12:05,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 163 [2020-10-12 18:12:05,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:12:05,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 18:12:05,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-12 18:12:05,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 18:12:05,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:12:05,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 18:12:05,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:12:05,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:12:05,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:12:05,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 18:12:05,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:12:05,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 18:12:05,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:12:05,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 18:12:05,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:12:05,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 18:12:05,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:12:05,523 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-12 18:12:05,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1059552013] [2020-10-12 18:12:05,524 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 18:12:05,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 18:12:05,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144078146] [2020-10-12 18:12:05,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 18:12:05,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 18:12:05,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 18:12:05,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 18:12:05,526 INFO L87 Difference]: Start difference. First operand 325 states and 463 transitions. Second operand 4 states. [2020-10-12 18:12:05,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 18:12:05,710 INFO L93 Difference]: Finished difference Result 408 states and 579 transitions. [2020-10-12 18:12:05,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 18:12:05,710 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 52 [2020-10-12 18:12:05,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 18:12:05,712 INFO L225 Difference]: With dead ends: 408 [2020-10-12 18:12:05,712 INFO L226 Difference]: Without dead ends: 187 [2020-10-12 18:12:05,713 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 18:12:05,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-12 18:12:05,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 185. [2020-10-12 18:12:05,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-10-12 18:12:05,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 257 transitions. [2020-10-12 18:12:05,723 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 257 transitions. Word has length 52 [2020-10-12 18:12:05,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 18:12:05,724 INFO L479 AbstractCegarLoop]: Abstraction has 185 states and 257 transitions. [2020-10-12 18:12:05,724 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 18:12:05,724 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 257 transitions. [2020-10-12 18:12:05,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-12 18:12:05,725 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 18:12:05,725 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 18:12:05,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 18:12:05,725 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 18:12:05,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 18:12:05,726 INFO L82 PathProgramCache]: Analyzing trace with hash 680264501, now seen corresponding path program 1 times [2020-10-12 18:12:05,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 18:12:05,726 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [681662247] [2020-10-12 18:12:05,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 18:12:05,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:12:05,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:12:06,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:12:06,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:12:06,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-12 18:12:06,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 18:12:06,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 654 [2020-10-12 18:12:06,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:12:06,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 18:12:06,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-12 18:12:06,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-12 18:12:06,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:12:06,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 18:12:06,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:12:06,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:12:06,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:12:06,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 18:12:06,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:12:06,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 18:12:06,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:12:06,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 18:12:06,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:12:06,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 18:12:06,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:12:06,589 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 18:12:06,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [681662247] [2020-10-12 18:12:06,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 18:12:06,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 18:12:06,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311682022] [2020-10-12 18:12:06,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 18:12:06,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 18:12:06,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 18:12:06,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 18:12:06,591 INFO L87 Difference]: Start difference. First operand 185 states and 257 transitions. Second operand 7 states. [2020-10-12 18:12:07,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 18:12:07,267 INFO L93 Difference]: Finished difference Result 187 states and 258 transitions. [2020-10-12 18:12:07,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 18:12:07,268 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 55 [2020-10-12 18:12:07,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 18:12:07,269 INFO L225 Difference]: With dead ends: 187 [2020-10-12 18:12:07,269 INFO L226 Difference]: Without dead ends: 185 [2020-10-12 18:12:07,270 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-12 18:12:07,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-12 18:12:07,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2020-10-12 18:12:07,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-10-12 18:12:07,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 256 transitions. [2020-10-12 18:12:07,280 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 256 transitions. Word has length 55 [2020-10-12 18:12:07,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 18:12:07,280 INFO L479 AbstractCegarLoop]: Abstraction has 185 states and 256 transitions. [2020-10-12 18:12:07,281 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 18:12:07,281 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 256 transitions. [2020-10-12 18:12:07,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-12 18:12:07,281 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 18:12:07,281 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 18:12:07,282 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 18:12:07,282 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 18:12:07,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 18:12:07,282 INFO L82 PathProgramCache]: Analyzing trace with hash -379328264, now seen corresponding path program 1 times [2020-10-12 18:12:07,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 18:12:07,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1953662593] [2020-10-12 18:12:07,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 18:12:07,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:12:07,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:12:07,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:12:08,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:12:08,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-12 18:12:08,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 18:12:08,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1091 [2020-10-12 18:12:08,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:12:08,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 18:12:08,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-12 18:12:08,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-12 18:12:08,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:12:08,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 18:12:08,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:12:08,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:12:08,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:12:08,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 18:12:08,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:12:08,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 18:12:08,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:12:08,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 18:12:08,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:12:08,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 18:12:08,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:12:08,738 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 18:12:08,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1953662593] [2020-10-12 18:12:08,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 18:12:08,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 18:12:08,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981131726] [2020-10-12 18:12:08,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 18:12:08,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 18:12:08,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 18:12:08,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-12 18:12:08,741 INFO L87 Difference]: Start difference. First operand 185 states and 256 transitions. Second operand 8 states. [2020-10-12 18:12:09,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 18:12:09,729 INFO L93 Difference]: Finished difference Result 188 states and 259 transitions. [2020-10-12 18:12:09,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 18:12:09,730 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 61 [2020-10-12 18:12:09,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 18:12:09,731 INFO L225 Difference]: With dead ends: 188 [2020-10-12 18:12:09,731 INFO L226 Difference]: Without dead ends: 186 [2020-10-12 18:12:09,732 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-10-12 18:12:09,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-12 18:12:09,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2020-10-12 18:12:09,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-10-12 18:12:09,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 257 transitions. [2020-10-12 18:12:09,743 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 257 transitions. Word has length 61 [2020-10-12 18:12:09,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 18:12:09,744 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 257 transitions. [2020-10-12 18:12:09,744 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 18:12:09,744 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 257 transitions. [2020-10-12 18:12:09,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-12 18:12:09,745 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 18:12:09,745 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 6, 6, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 18:12:09,745 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 18:12:09,745 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 18:12:09,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 18:12:09,746 INFO L82 PathProgramCache]: Analyzing trace with hash -101241370, now seen corresponding path program 1 times [2020-10-12 18:12:09,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 18:12:09,746 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1387063437] [2020-10-12 18:12:09,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 18:12:09,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:12:09,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:12:10,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:12:11,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:12:13,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:12:13,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-12 18:12:13,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 18:12:13,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3662 [2020-10-12 18:12:13,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:12:13,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 18:12:13,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-12 18:12:13,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-12 18:12:13,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:12:13,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 18:12:13,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:12:13,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:12:13,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:12:13,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 18:12:13,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:12:13,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 18:12:13,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:12:13,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 18:12:13,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:12:13,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 18:12:13,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:12:13,635 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 37 proven. 57 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2020-10-12 18:12:13,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1387063437] [2020-10-12 18:12:13,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 18:12:13,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 18:12:13,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263210986] [2020-10-12 18:12:13,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 18:12:13,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 18:12:13,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 18:12:13,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 18:12:13,643 INFO L87 Difference]: Start difference. First operand 186 states and 257 transitions. Second operand 6 states. [2020-10-12 18:12:14,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 18:12:14,081 INFO L93 Difference]: Finished difference Result 194 states and 263 transitions. [2020-10-12 18:12:14,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 18:12:14,081 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 93 [2020-10-12 18:12:14,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 18:12:14,083 INFO L225 Difference]: With dead ends: 194 [2020-10-12 18:12:14,083 INFO L226 Difference]: Without dead ends: 190 [2020-10-12 18:12:14,084 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-12 18:12:14,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-12 18:12:14,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 184. [2020-10-12 18:12:14,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-10-12 18:12:14,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 253 transitions. [2020-10-12 18:12:14,096 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 253 transitions. Word has length 93 [2020-10-12 18:12:14,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 18:12:14,097 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 253 transitions. [2020-10-12 18:12:14,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 18:12:14,097 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 253 transitions. [2020-10-12 18:12:14,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-12 18:12:14,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 18:12:14,098 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 6, 6, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 18:12:14,098 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 18:12:14,099 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 18:12:14,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 18:12:14,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1099284984, now seen corresponding path program 1 times [2020-10-12 18:12:14,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 18:12:14,100 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [19924826] [2020-10-12 18:12:14,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 18:12:14,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:12:14,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:12:14,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:12:16,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:12:19,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:12:19,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-12 18:12:19,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 18:12:19,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5044 [2020-10-12 18:12:19,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:12:19,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 18:12:19,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-12 18:12:19,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-12 18:12:19,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:12:19,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 18:12:19,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:12:19,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:12:19,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:12:19,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 18:12:19,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:12:19,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 18:12:19,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:12:19,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 18:12:19,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:12:19,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 18:12:19,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 18:12:19,784 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 16 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 18:12:19,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [19924826] [2020-10-12 18:12:19,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 18:12:19,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 18:12:19,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000856347] [2020-10-12 18:12:19,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 18:12:19,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 18:12:19,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 18:12:19,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-12 18:12:19,790 INFO L87 Difference]: Start difference. First operand 184 states and 253 transitions. Second operand 11 states. [2020-10-12 18:12:21,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 18:12:21,133 INFO L93 Difference]: Finished difference Result 184 states and 253 transitions. [2020-10-12 18:12:21,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 18:12:21,134 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 97 [2020-10-12 18:12:21,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 18:12:21,134 INFO L225 Difference]: With dead ends: 184 [2020-10-12 18:12:21,135 INFO L226 Difference]: Without dead ends: 0 [2020-10-12 18:12:21,136 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2020-10-12 18:12:21,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-12 18:12:21,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-12 18:12:21,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-12 18:12:21,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-12 18:12:21,137 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 97 [2020-10-12 18:12:21,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 18:12:21,137 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-12 18:12:21,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 18:12:21,137 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-12 18:12:21,137 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-12 18:12:21,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 18:12:21,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-12 18:12:21,505 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 40 [2020-10-12 18:12:21,826 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 53 [2020-10-12 18:12:21,831 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-12 18:12:21,831 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= ~m_recv_ack_2~0 |old(~m_recv_ack_2~0)|) (= ~m_msg_1_2~0 |old(~m_msg_1_2~0)|) (= ~m_Protocol~0 |old(~m_Protocol~0)|) (= ~m_recv_ack_1_2~0 |old(~m_recv_ack_1_2~0)|) (= ~m_msg_2~0 |old(~m_msg_2~0)|) (= ~m_recv_ack_1_1~0 |old(~m_recv_ack_1_1~0)|) (= ~m_msg_1_1~0 |old(~m_msg_1_1~0)|)) [2020-10-12 18:12:21,832 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-12 18:12:21,832 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-12 18:12:21,832 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-12 18:12:21,832 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-12 18:12:21,832 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-12 18:12:21,832 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 14 566) no Hoare annotation was computed. [2020-10-12 18:12:21,832 INFO L268 CegarLoopResult]: For program point L498(lines 498 500) no Hoare annotation was computed. [2020-10-12 18:12:21,833 INFO L268 CegarLoopResult]: For program point L366(lines 366 368) no Hoare annotation was computed. [2020-10-12 18:12:21,833 INFO L268 CegarLoopResult]: For program point L466(lines 466 468) no Hoare annotation was computed. [2020-10-12 18:12:21,833 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 14 566) no Hoare annotation was computed. [2020-10-12 18:12:21,833 INFO L268 CegarLoopResult]: For program point L39(lines 39 58) no Hoare annotation was computed. [2020-10-12 18:12:21,833 INFO L268 CegarLoopResult]: For program point L40(lines 40 55) no Hoare annotation was computed. [2020-10-12 18:12:21,833 INFO L268 CegarLoopResult]: For program point L140(lines 140 155) no Hoare annotation was computed. [2020-10-12 18:12:21,833 INFO L268 CegarLoopResult]: For program point L240(lines 240 255) no Hoare annotation was computed. [2020-10-12 18:12:21,834 INFO L268 CegarLoopResult]: For program point L108(lines 108 123) no Hoare annotation was computed. [2020-10-12 18:12:21,834 INFO L268 CegarLoopResult]: For program point L42(lines 42 53) no Hoare annotation was computed. [2020-10-12 18:12:21,834 INFO L268 CegarLoopResult]: For program point L340(lines 340 355) no Hoare annotation was computed. [2020-10-12 18:12:21,834 INFO L268 CegarLoopResult]: For program point L208(lines 208 223) no Hoare annotation was computed. [2020-10-12 18:12:21,834 INFO L268 CegarLoopResult]: For program point L142(lines 142 153) no Hoare annotation was computed. [2020-10-12 18:12:21,834 INFO L268 CegarLoopResult]: For program point L76(lines 76 91) no Hoare annotation was computed. [2020-10-12 18:12:21,834 INFO L268 CegarLoopResult]: For program point L440(lines 440 455) no Hoare annotation was computed. [2020-10-12 18:12:21,834 INFO L268 CegarLoopResult]: For program point L308(lines 308 323) no Hoare annotation was computed. [2020-10-12 18:12:21,834 INFO L268 CegarLoopResult]: For program point L242(lines 242 253) no Hoare annotation was computed. [2020-10-12 18:12:21,835 INFO L268 CegarLoopResult]: For program point L176(lines 176 191) no Hoare annotation was computed. [2020-10-12 18:12:21,835 INFO L268 CegarLoopResult]: For program point L110(lines 110 121) no Hoare annotation was computed. [2020-10-12 18:12:21,835 INFO L268 CegarLoopResult]: For program point L540(lines 540 555) no Hoare annotation was computed. [2020-10-12 18:12:21,835 INFO L268 CegarLoopResult]: For program point L408(lines 408 423) no Hoare annotation was computed. [2020-10-12 18:12:21,835 INFO L268 CegarLoopResult]: For program point L342(lines 342 353) no Hoare annotation was computed. [2020-10-12 18:12:21,835 INFO L268 CegarLoopResult]: For program point L276(lines 276 291) no Hoare annotation was computed. [2020-10-12 18:12:21,835 INFO L268 CegarLoopResult]: For program point L210(lines 210 221) no Hoare annotation was computed. [2020-10-12 18:12:21,836 INFO L268 CegarLoopResult]: For program point L78(lines 78 89) no Hoare annotation was computed. [2020-10-12 18:12:21,836 INFO L268 CegarLoopResult]: For program point L508(lines 508 523) no Hoare annotation was computed. [2020-10-12 18:12:21,836 INFO L268 CegarLoopResult]: For program point L442(lines 442 453) no Hoare annotation was computed. [2020-10-12 18:12:21,836 INFO L268 CegarLoopResult]: For program point L376(lines 376 391) no Hoare annotation was computed. [2020-10-12 18:12:21,836 INFO L268 CegarLoopResult]: For program point L310(lines 310 321) no Hoare annotation was computed. [2020-10-12 18:12:21,836 INFO L268 CegarLoopResult]: For program point L178(lines 178 189) no Hoare annotation was computed. [2020-10-12 18:12:21,836 INFO L268 CegarLoopResult]: For program point L46(lines 46 48) no Hoare annotation was computed. [2020-10-12 18:12:21,837 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 565) no Hoare annotation was computed. [2020-10-12 18:12:21,837 INFO L268 CegarLoopResult]: For program point L542(lines 542 553) no Hoare annotation was computed. [2020-10-12 18:12:21,837 INFO L268 CegarLoopResult]: For program point L476(lines 476 491) no Hoare annotation was computed. [2020-10-12 18:12:21,837 INFO L268 CegarLoopResult]: For program point L410(lines 410 421) no Hoare annotation was computed. [2020-10-12 18:12:21,837 INFO L268 CegarLoopResult]: For program point L278(lines 278 289) no Hoare annotation was computed. [2020-10-12 18:12:21,837 INFO L268 CegarLoopResult]: For program point L146(lines 146 148) no Hoare annotation was computed. [2020-10-12 18:12:21,837 INFO L268 CegarLoopResult]: For program point L510(lines 510 521) no Hoare annotation was computed. [2020-10-12 18:12:21,838 INFO L268 CegarLoopResult]: For program point L378(lines 378 389) no Hoare annotation was computed. [2020-10-12 18:12:21,838 INFO L268 CegarLoopResult]: For program point L246(lines 246 248) no Hoare annotation was computed. [2020-10-12 18:12:21,838 INFO L268 CegarLoopResult]: For program point L114(lines 114 116) no Hoare annotation was computed. [2020-10-12 18:12:21,838 INFO L268 CegarLoopResult]: For program point L478(lines 478 489) no Hoare annotation was computed. [2020-10-12 18:12:21,838 INFO L268 CegarLoopResult]: For program point L346(lines 346 348) no Hoare annotation was computed. [2020-10-12 18:12:21,838 INFO L268 CegarLoopResult]: For program point L214(lines 214 216) no Hoare annotation was computed. [2020-10-12 18:12:21,838 INFO L268 CegarLoopResult]: For program point L82(lines 82 84) no Hoare annotation was computed. [2020-10-12 18:12:21,838 INFO L268 CegarLoopResult]: For program point L446(lines 446 448) no Hoare annotation was computed. [2020-10-12 18:12:21,839 INFO L268 CegarLoopResult]: For program point L314(lines 314 316) no Hoare annotation was computed. [2020-10-12 18:12:21,839 INFO L268 CegarLoopResult]: For program point L182(lines 182 184) no Hoare annotation was computed. [2020-10-12 18:12:21,839 INFO L268 CegarLoopResult]: For program point L546(lines 546 548) no Hoare annotation was computed. [2020-10-12 18:12:21,839 INFO L268 CegarLoopResult]: For program point L414(lines 414 416) no Hoare annotation was computed. [2020-10-12 18:12:21,839 INFO L268 CegarLoopResult]: For program point L282(lines 282 284) no Hoare annotation was computed. [2020-10-12 18:12:21,839 INFO L264 CegarLoopResult]: At program point L547(lines 14 566) the Hoare annotation is: false [2020-10-12 18:12:21,839 INFO L268 CegarLoopResult]: For program point L514(lines 514 516) no Hoare annotation was computed. [2020-10-12 18:12:21,839 INFO L268 CegarLoopResult]: For program point L382(lines 382 384) no Hoare annotation was computed. [2020-10-12 18:12:21,840 INFO L268 CegarLoopResult]: For program point L482(lines 482 484) no Hoare annotation was computed. [2020-10-12 18:12:21,840 INFO L264 CegarLoopResult]: At program point L24-2(lines 24 561) the Hoare annotation is: (let ((.cse0 (<= 0 (+ main_~P8~0 2147483648))) (.cse1 (<= main_~P8~0 2147483647)) (.cse2 (* main_~this_expect~0 (- 1))) (.cse3 (< 0 (+ (div main_~this_buffer_empty~0 4294967296) 1))) (.cse4 (<= main_~this_buffer_empty~0 0))) (or (and .cse0 .cse1 (<= 0 (+ main_~this_expect~0 (* 2 (div .cse2 2)))) (<= 5 main_~q~0) .cse3 .cse4) (and (= main_~q~0 0) (<= 0 main_~this_expect~0) .cse3 (<= main_~this_expect~0 0) .cse4) (and .cse0 .cse1 (<= 3 main_~q~0) (<= 1 (+ main_~this_expect~0 (* 2 (div (+ .cse2 1) 2)))) .cse3 (<= main_~q~0 3) .cse4))) [2020-10-12 18:12:21,840 INFO L268 CegarLoopResult]: For program point L24-3(lines 24 561) no Hoare annotation was computed. [2020-10-12 18:12:21,840 INFO L268 CegarLoopResult]: For program point L124(lines 124 139) no Hoare annotation was computed. [2020-10-12 18:12:21,840 INFO L268 CegarLoopResult]: For program point L224(lines 224 239) no Hoare annotation was computed. [2020-10-12 18:12:21,840 INFO L268 CegarLoopResult]: For program point L92(lines 92 107) no Hoare annotation was computed. [2020-10-12 18:12:21,841 INFO L268 CegarLoopResult]: For program point L59(lines 59 158) no Hoare annotation was computed. [2020-10-12 18:12:21,841 INFO L268 CegarLoopResult]: For program point L324(lines 324 339) no Hoare annotation was computed. [2020-10-12 18:12:21,841 INFO L268 CegarLoopResult]: For program point L192(lines 192 207) no Hoare annotation was computed. [2020-10-12 18:12:21,841 INFO L268 CegarLoopResult]: For program point L159(lines 159 258) no Hoare annotation was computed. [2020-10-12 18:12:21,841 INFO L268 CegarLoopResult]: For program point L126(lines 126 137) no Hoare annotation was computed. [2020-10-12 18:12:21,841 INFO L268 CegarLoopResult]: For program point L60(lines 60 75) no Hoare annotation was computed. [2020-10-12 18:12:21,841 INFO L268 CegarLoopResult]: For program point L424(lines 424 439) no Hoare annotation was computed. [2020-10-12 18:12:21,841 INFO L268 CegarLoopResult]: For program point L292(lines 292 307) no Hoare annotation was computed. [2020-10-12 18:12:21,841 INFO L268 CegarLoopResult]: For program point L259(lines 259 358) no Hoare annotation was computed. [2020-10-12 18:12:21,842 INFO L268 CegarLoopResult]: For program point L226(lines 226 237) no Hoare annotation was computed. [2020-10-12 18:12:21,842 INFO L268 CegarLoopResult]: For program point L160(lines 160 175) no Hoare annotation was computed. [2020-10-12 18:12:21,842 INFO L268 CegarLoopResult]: For program point L94(lines 94 105) no Hoare annotation was computed. [2020-10-12 18:12:21,842 INFO L264 CegarLoopResult]: At program point L557(lines 24 561) the Hoare annotation is: (let ((.cse2 (* main_~this_expect~0 (- 1)))) (let ((.cse4 (<= 0 (+ main_~this_expect~0 (* 2 (div .cse2 2))))) (.cse0 (<= 0 (+ main_~P8~0 2147483648))) (.cse6 (<= main_~this_buffer_empty~0 1)) (.cse1 (<= main_~P8~0 2147483647)) (.cse7 (<= 1 main_~this_buffer_empty~0)) (.cse5 (< 0 (+ (div main_~this_buffer_empty~0 4294967296) 1))) (.cse3 (<= main_~this_buffer_empty~0 0))) (or (and .cse0 .cse1 (<= 3 main_~q~0) (<= 1 (+ main_~this_expect~0 (* 2 (div (+ .cse2 1) 2)))) (<= 0 main_~this_buffer_empty~0) (<= main_~q~0 3) .cse3) (and .cse0 .cse1 .cse4 (<= 5 main_~q~0) .cse5 .cse3) (and .cse0 .cse6 .cse1 .cse7 .cse4 (= main_~q~0 1)) (and .cse0 .cse6 .cse1 .cse7 (= main_~q~0 4) (not (= (* (div main_~this_expect~0 2) 2) main_~this_expect~0))) (and (= main_~q~0 0) (<= 0 main_~this_expect~0) .cse5 (<= main_~this_expect~0 0) .cse3)))) [2020-10-12 18:12:21,842 INFO L268 CegarLoopResult]: For program point L524(lines 524 539) no Hoare annotation was computed. [2020-10-12 18:12:21,842 INFO L268 CegarLoopResult]: For program point L392(lines 392 407) no Hoare annotation was computed. [2020-10-12 18:12:21,842 INFO L268 CegarLoopResult]: For program point L359(lines 359 458) no Hoare annotation was computed. [2020-10-12 18:12:21,843 INFO L268 CegarLoopResult]: For program point L326(lines 326 337) no Hoare annotation was computed. [2020-10-12 18:12:21,843 INFO L268 CegarLoopResult]: For program point L260(lines 260 275) no Hoare annotation was computed. [2020-10-12 18:12:21,843 INFO L268 CegarLoopResult]: For program point L194(lines 194 205) no Hoare annotation was computed. [2020-10-12 18:12:21,843 INFO L268 CegarLoopResult]: For program point L62(lines 62 73) no Hoare annotation was computed. [2020-10-12 18:12:21,843 INFO L268 CegarLoopResult]: For program point L492(lines 492 507) no Hoare annotation was computed. [2020-10-12 18:12:21,843 INFO L268 CegarLoopResult]: For program point L459(lines 459 558) no Hoare annotation was computed. [2020-10-12 18:12:21,843 INFO L268 CegarLoopResult]: For program point L426(lines 426 437) no Hoare annotation was computed. [2020-10-12 18:12:21,843 INFO L268 CegarLoopResult]: For program point L360(lines 360 375) no Hoare annotation was computed. [2020-10-12 18:12:21,843 INFO L268 CegarLoopResult]: For program point L294(lines 294 305) no Hoare annotation was computed. [2020-10-12 18:12:21,844 INFO L268 CegarLoopResult]: For program point L162(lines 162 173) no Hoare annotation was computed. [2020-10-12 18:12:21,844 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 14 566) the Hoare annotation is: true [2020-10-12 18:12:21,844 INFO L268 CegarLoopResult]: For program point L526(lines 526 537) no Hoare annotation was computed. [2020-10-12 18:12:21,844 INFO L268 CegarLoopResult]: For program point L460(lines 460 475) no Hoare annotation was computed. [2020-10-12 18:12:21,844 INFO L268 CegarLoopResult]: For program point L394(lines 394 405) no Hoare annotation was computed. [2020-10-12 18:12:21,844 INFO L268 CegarLoopResult]: For program point L262(lines 262 273) no Hoare annotation was computed. [2020-10-12 18:12:21,844 INFO L268 CegarLoopResult]: For program point L130(lines 130 132) no Hoare annotation was computed. [2020-10-12 18:12:21,844 INFO L268 CegarLoopResult]: For program point L494(lines 494 505) no Hoare annotation was computed. [2020-10-12 18:12:21,844 INFO L268 CegarLoopResult]: For program point L362(lines 362 373) no Hoare annotation was computed. [2020-10-12 18:12:21,845 INFO L268 CegarLoopResult]: For program point L230(lines 230 232) no Hoare annotation was computed. [2020-10-12 18:12:21,845 INFO L268 CegarLoopResult]: For program point L98(lines 98 100) no Hoare annotation was computed. [2020-10-12 18:12:21,845 INFO L268 CegarLoopResult]: For program point L462(lines 462 473) no Hoare annotation was computed. [2020-10-12 18:12:21,845 INFO L268 CegarLoopResult]: For program point L330(lines 330 332) no Hoare annotation was computed. [2020-10-12 18:12:21,845 INFO L268 CegarLoopResult]: For program point L198(lines 198 200) no Hoare annotation was computed. [2020-10-12 18:12:21,845 INFO L268 CegarLoopResult]: For program point L66(lines 66 68) no Hoare annotation was computed. [2020-10-12 18:12:21,845 INFO L268 CegarLoopResult]: For program point L430(lines 430 432) no Hoare annotation was computed. [2020-10-12 18:12:21,845 INFO L268 CegarLoopResult]: For program point L298(lines 298 300) no Hoare annotation was computed. [2020-10-12 18:12:21,845 INFO L268 CegarLoopResult]: For program point L166(lines 166 168) no Hoare annotation was computed. [2020-10-12 18:12:21,846 INFO L268 CegarLoopResult]: For program point L530(lines 530 532) no Hoare annotation was computed. [2020-10-12 18:12:21,846 INFO L268 CegarLoopResult]: For program point L398(lines 398 400) no Hoare annotation was computed. [2020-10-12 18:12:21,846 INFO L268 CegarLoopResult]: For program point L266(lines 266 268) no Hoare annotation was computed. [2020-10-12 18:12:21,868 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.10 06:12:21 BoogieIcfgContainer [2020-10-12 18:12:21,868 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-12 18:12:21,870 INFO L168 Benchmark]: Toolchain (without parser) took 30436.60 ms. Allocated memory was 140.5 MB in the beginning and 647.0 MB in the end (delta: 506.5 MB). Free memory was 102.6 MB in the beginning and 517.3 MB in the end (delta: -414.7 MB). Peak memory consumption was 495.1 MB. Max. memory is 7.1 GB. [2020-10-12 18:12:21,871 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-10-12 18:12:21,871 INFO L168 Benchmark]: CACSL2BoogieTranslator took 629.77 ms. Allocated memory was 140.5 MB in the beginning and 206.6 MB in the end (delta: 66.1 MB). Free memory was 102.4 MB in the beginning and 178.7 MB in the end (delta: -76.3 MB). Peak memory consumption was 27.8 MB. Max. memory is 7.1 GB. [2020-10-12 18:12:21,872 INFO L168 Benchmark]: Boogie Preprocessor took 113.54 ms. Allocated memory is still 206.6 MB. Free memory was 178.7 MB in the beginning and 175.2 MB in the end (delta: 3.5 MB). Peak memory consumption was 3.5 MB. Max. memory is 7.1 GB. [2020-10-12 18:12:21,872 INFO L168 Benchmark]: RCFGBuilder took 972.89 ms. Allocated memory is still 206.6 MB. Free memory was 175.2 MB in the beginning and 121.1 MB in the end (delta: 54.1 MB). Peak memory consumption was 54.1 MB. Max. memory is 7.1 GB. [2020-10-12 18:12:21,873 INFO L168 Benchmark]: TraceAbstraction took 28712.99 ms. Allocated memory was 206.6 MB in the beginning and 647.0 MB in the end (delta: 440.4 MB). Free memory was 120.4 MB in the beginning and 517.3 MB in the end (delta: -396.9 MB). Peak memory consumption was 446.8 MB. Max. memory is 7.1 GB. [2020-10-12 18:12:21,880 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 629.77 ms. Allocated memory was 140.5 MB in the beginning and 206.6 MB in the end (delta: 66.1 MB). Free memory was 102.4 MB in the beginning and 178.7 MB in the end (delta: -76.3 MB). Peak memory consumption was 27.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 113.54 ms. Allocated memory is still 206.6 MB. Free memory was 178.7 MB in the beginning and 175.2 MB in the end (delta: 3.5 MB). Peak memory consumption was 3.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 972.89 ms. Allocated memory is still 206.6 MB. Free memory was 175.2 MB in the beginning and 121.1 MB in the end (delta: 54.1 MB). Peak memory consumption was 54.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 28712.99 ms. Allocated memory was 206.6 MB in the beginning and 647.0 MB in the end (delta: 440.4 MB). Free memory was 120.4 MB in the beginning and 517.3 MB in the end (delta: -396.9 MB). Peak memory consumption was 446.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 565]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: ((((((0 <= P8 + 2147483648 && P8 <= 2147483647) && 0 <= this_expect + 2 * (this_expect * -1 / 2)) && 5 <= q) && 0 < this_buffer_empty / 4294967296 + 1) && this_buffer_empty <= 0) || ((((q == 0 && 0 <= this_expect) && 0 < this_buffer_empty / 4294967296 + 1) && this_expect <= 0) && this_buffer_empty <= 0)) || ((((((0 <= P8 + 2147483648 && P8 <= 2147483647) && 3 <= q) && 1 <= this_expect + 2 * ((this_expect * -1 + 1) / 2)) && 0 < this_buffer_empty / 4294967296 + 1) && q <= 3) && this_buffer_empty <= 0) - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: (((((((((0 <= P8 + 2147483648 && P8 <= 2147483647) && 3 <= q) && 1 <= this_expect + 2 * ((this_expect * -1 + 1) / 2)) && 0 <= this_buffer_empty) && q <= 3) && this_buffer_empty <= 0) || (((((0 <= P8 + 2147483648 && P8 <= 2147483647) && 0 <= this_expect + 2 * (this_expect * -1 / 2)) && 5 <= q) && 0 < this_buffer_empty / 4294967296 + 1) && this_buffer_empty <= 0)) || (((((0 <= P8 + 2147483648 && this_buffer_empty <= 1) && P8 <= 2147483647) && 1 <= this_buffer_empty) && 0 <= this_expect + 2 * (this_expect * -1 / 2)) && q == 1)) || (((((0 <= P8 + 2147483648 && this_buffer_empty <= 1) && P8 <= 2147483647) && 1 <= this_buffer_empty) && q == 4) && !(this_expect / 2 * 2 == this_expect))) || ((((q == 0 && 0 <= this_expect) && 0 < this_buffer_empty / 4294967296 + 1) && this_expect <= 0) && this_buffer_empty <= 0) - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 114 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 27.9s, OverallIterations: 19, TraceHistogramMax: 9, AutomataDifference: 9.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2742 SDtfs, 5194 SDslu, 234 SDs, 0 SdLazy, 4409 SolverSat, 192 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 207 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 2.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=327occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 19 MinimizatonAttempts, 163 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 22 NumberOfFragments, 261 HoareAnnotationTreeSize, 7 FomulaSimplifications, 3636 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 7 FomulaSimplificationsInter, 731 FormulaSimplificationTreeSizeReductionInter, 0.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 17.0s InterpolantComputationTime, 768 NumberOfCodeBlocks, 768 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 749 ConstructedInterpolants, 0 QuantifiedInterpolants, 396196 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 19 InterpolantComputations, 10 PerfectInterpolantSequences, 273/582 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...