/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --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/loops-crafted-1/in-de41.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 23:57:19,073 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 23:57:19,076 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 23:57:19,118 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 23:57:19,118 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 23:57:19,126 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 23:57:19,128 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 23:57:19,132 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 23:57:19,134 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 23:57:19,137 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 23:57:19,138 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 23:57:19,139 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 23:57:19,139 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 23:57:19,142 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 23:57:19,145 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 23:57:19,147 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 23:57:19,149 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 23:57:19,149 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 23:57:19,151 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 23:57:19,157 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 23:57:19,158 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 23:57:19,159 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 23:57:19,160 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 23:57:19,161 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 23:57:19,173 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 23:57:19,173 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 23:57:19,174 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 23:57:19,176 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 23:57:19,176 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 23:57:19,177 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 23:57:19,178 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 23:57:19,178 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 23:57:19,179 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 23:57:19,180 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 23:57:19,182 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 23:57:19,182 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 23:57:19,182 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 23:57:19,183 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 23:57:19,183 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 23:57:19,186 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 23:57:19,187 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 23:57:19,188 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 [2020-10-14 23:57:19,227 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 23:57:19,227 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 23:57:19,229 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 23:57:19,229 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 23:57:19,229 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 23:57:19,229 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 23:57:19,230 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 23:57:19,230 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 23:57:19,230 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 23:57:19,230 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 23:57:19,230 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 23:57:19,230 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 23:57:19,231 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 23:57:19,231 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 23:57:19,231 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 23:57:19,231 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 23:57:19,231 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 23:57:19,232 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 23:57:19,232 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 23:57:19,232 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 23:57:19,232 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 23:57:19,232 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 23:57:19,233 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 23:57:19,233 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 23:57:19,233 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 23:57:19,233 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 23:57:19,233 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 23:57:19,234 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 23:57:19,234 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 23:57:19,234 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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-14 23:57:19,522 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 23:57:19,536 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 23:57:19,544 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 23:57:19,548 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 23:57:19,549 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 23:57:19,549 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/in-de41.c [2020-10-14 23:57:19,610 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/825216c9e/f861bc5d7bb64efc8b145c57e161de73/FLAG1bafbe3a8 [2020-10-14 23:57:20,008 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 23:57:20,009 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/in-de41.c [2020-10-14 23:57:20,017 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/825216c9e/f861bc5d7bb64efc8b145c57e161de73/FLAG1bafbe3a8 [2020-10-14 23:57:20,386 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/825216c9e/f861bc5d7bb64efc8b145c57e161de73 [2020-10-14 23:57:20,397 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 23:57:20,399 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 23:57:20,404 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 23:57:20,404 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 23:57:20,409 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 23:57:20,410 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:57:20" (1/1) ... [2020-10-14 23:57:20,415 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ef00bf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:20, skipping insertion in model container [2020-10-14 23:57:20,415 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:57:20" (1/1) ... [2020-10-14 23:57:20,424 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 23:57:20,447 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 23:57:20,671 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 23:57:20,675 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 23:57:20,689 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 23:57:20,700 INFO L208 MainTranslator]: Completed translation [2020-10-14 23:57:20,701 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:20 WrapperNode [2020-10-14 23:57:20,701 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 23:57:20,701 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 23:57:20,702 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 23:57:20,702 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 23:57:20,712 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:20" (1/1) ... [2020-10-14 23:57:20,712 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:20" (1/1) ... [2020-10-14 23:57:20,791 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:20" (1/1) ... [2020-10-14 23:57:20,791 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:20" (1/1) ... [2020-10-14 23:57:20,795 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:20" (1/1) ... [2020-10-14 23:57:20,801 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:20" (1/1) ... [2020-10-14 23:57:20,802 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:20" (1/1) ... [2020-10-14 23:57:20,803 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 23:57:20,804 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 23:57:20,804 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 23:57:20,804 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 23:57:20,806 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:20" (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 [2020-10-14 23:57:20,861 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 23:57:20,861 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 23:57:20,862 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 23:57:20,862 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 23:57:20,862 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 23:57:20,862 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-14 23:57:20,862 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 23:57:20,862 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 23:57:20,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 23:57:20,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 23:57:21,099 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 23:57:21,099 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-14 23:57:21,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:57:21 BoogieIcfgContainer [2020-10-14 23:57:21,109 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 23:57:21,112 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 23:57:21,113 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 23:57:21,119 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 23:57:21,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:57:20" (1/3) ... [2020-10-14 23:57:21,123 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50302728 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:57:21, skipping insertion in model container [2020-10-14 23:57:21,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:20" (2/3) ... [2020-10-14 23:57:21,124 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50302728 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:57:21, skipping insertion in model container [2020-10-14 23:57:21,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:57:21" (3/3) ... [2020-10-14 23:57:21,129 INFO L109 eAbstractionObserver]: Analyzing ICFG in-de41.c [2020-10-14 23:57:21,155 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 23:57:21,171 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 23:57:21,207 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 23:57:21,272 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 23:57:21,272 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 23:57:21,272 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 23:57:21,272 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 23:57:21,273 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 23:57:21,273 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 23:57:21,273 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 23:57:21,273 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 23:57:21,306 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-10-14 23:57:21,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-14 23:57:21,311 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:21,312 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:21,312 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:21,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:21,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1870796656, now seen corresponding path program 1 times [2020-10-14 23:57:21,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:21,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1910515107] [2020-10-14 23:57:21,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:21,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:21,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:21,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:21,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:21,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-14 23:57:21,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:57:21,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 297 [2020-10-14 23:57:21,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:21,716 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:21,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 23:57:21,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:21,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 23:57:21,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-14 23:57:22,003 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 26 [2020-10-14 23:57:22,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:22,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:22,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:22,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:22,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:22,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:22,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 23:57:22,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:22,186 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:22,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:22,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:22,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:22,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:22,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:57:22,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1910515107] [2020-10-14 23:57:22,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:57:22,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 23:57:22,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667688471] [2020-10-14 23:57:22,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 23:57:22,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:22,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 23:57:22,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:57:22,235 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 6 states. [2020-10-14 23:57:22,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:22,364 INFO L93 Difference]: Finished difference Result 51 states and 76 transitions. [2020-10-14 23:57:22,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 23:57:22,367 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-10-14 23:57:22,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:22,375 INFO L225 Difference]: With dead ends: 51 [2020-10-14 23:57:22,376 INFO L226 Difference]: Without dead ends: 20 [2020-10-14 23:57:22,380 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:57:22,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-14 23:57:22,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-14 23:57:22,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-14 23:57:22,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2020-10-14 23:57:22,422 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 26 transitions. Word has length 14 [2020-10-14 23:57:22,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:22,423 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 26 transitions. [2020-10-14 23:57:22,423 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 23:57:22,423 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 26 transitions. [2020-10-14 23:57:22,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-14 23:57:22,424 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:22,424 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:22,425 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 23:57:22,425 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:22,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:22,425 INFO L82 PathProgramCache]: Analyzing trace with hash 2081142662, now seen corresponding path program 1 times [2020-10-14 23:57:22,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:22,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2120901008] [2020-10-14 23:57:22,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:22,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:22,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:22,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:22,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:22,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-14 23:57:22,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:57:22,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 204 [2020-10-14 23:57:22,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:22,641 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:22,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:57:22,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:22,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 23:57:22,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 23:57:22,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:22,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:22,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:22,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:22,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:22,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:22,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:57:22,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:22,848 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:22,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:22,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:22,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:22,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:22,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:57:22,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2120901008] [2020-10-14 23:57:22,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:22,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 23:57:22,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280033391] [2020-10-14 23:57:22,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 23:57:22,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:22,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 23:57:22,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:57:22,857 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. Second operand 7 states. [2020-10-14 23:57:22,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:22,971 INFO L93 Difference]: Finished difference Result 38 states and 51 transitions. [2020-10-14 23:57:22,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 23:57:22,972 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-10-14 23:57:22,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:22,975 INFO L225 Difference]: With dead ends: 38 [2020-10-14 23:57:22,976 INFO L226 Difference]: Without dead ends: 26 [2020-10-14 23:57:22,977 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:57:22,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-14 23:57:22,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 19. [2020-10-14 23:57:22,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-14 23:57:22,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2020-10-14 23:57:22,991 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 15 [2020-10-14 23:57:22,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:22,992 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2020-10-14 23:57:22,992 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 23:57:22,992 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2020-10-14 23:57:22,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-14 23:57:22,994 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:22,994 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:22,994 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 23:57:22,994 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:22,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:22,995 INFO L82 PathProgramCache]: Analyzing trace with hash -810996235, now seen corresponding path program 1 times [2020-10-14 23:57:22,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:22,996 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [798063544] [2020-10-14 23:57:22,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:23,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:23,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:23,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:23,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:23,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:23,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:23,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-14 23:57:23,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:57:23,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 143 [2020-10-14 23:57:23,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:23,150 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:23,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:57:23,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:23,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 23:57:23,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:23,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:23,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:23,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:23,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:23,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:23,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:23,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:57:23,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:23,242 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:23,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:23,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:23,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:23,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:23,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:57:23,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [798063544] [2020-10-14 23:57:23,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:57:23,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-14 23:57:23,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063125986] [2020-10-14 23:57:23,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 23:57:23,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:23,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 23:57:23,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:57:23,248 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand 7 states. [2020-10-14 23:57:23,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:23,380 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2020-10-14 23:57:23,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 23:57:23,380 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-10-14 23:57:23,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:23,382 INFO L225 Difference]: With dead ends: 42 [2020-10-14 23:57:23,382 INFO L226 Difference]: Without dead ends: 29 [2020-10-14 23:57:23,383 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:57:23,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-14 23:57:23,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2020-10-14 23:57:23,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-14 23:57:23,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2020-10-14 23:57:23,392 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 15 [2020-10-14 23:57:23,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:23,393 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2020-10-14 23:57:23,393 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 23:57:23,393 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2020-10-14 23:57:23,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-14 23:57:23,394 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:23,394 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:23,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 23:57:23,394 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:23,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:23,395 INFO L82 PathProgramCache]: Analyzing trace with hash 162818764, now seen corresponding path program 1 times [2020-10-14 23:57:23,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:23,395 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [114795754] [2020-10-14 23:57:23,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:23,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:23,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:23,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:23,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:23,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 23:57:23,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:57:23,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-10-14 23:57:23,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:23,463 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:23,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 23:57:23,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:23,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 23:57:23,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:23,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:23,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:23,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:23,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:23,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:23,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:23,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:57:23,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:23,481 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:23,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:23,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:23,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:23,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:23,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:57:23,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [114795754] [2020-10-14 23:57:23,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:57:23,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 23:57:23,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863611417] [2020-10-14 23:57:23,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 23:57:23,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:23,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 23:57:23,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 23:57:23,486 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand 4 states. [2020-10-14 23:57:23,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:23,518 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2020-10-14 23:57:23,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 23:57:23,519 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-14 23:57:23,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:23,520 INFO L225 Difference]: With dead ends: 31 [2020-10-14 23:57:23,520 INFO L226 Difference]: Without dead ends: 20 [2020-10-14 23:57:23,521 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 [2020-10-14 23:57:23,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-14 23:57:23,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-14 23:57:23,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-14 23:57:23,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2020-10-14 23:57:23,527 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 16 [2020-10-14 23:57:23,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:23,528 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2020-10-14 23:57:23,528 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 23:57:23,528 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2020-10-14 23:57:23,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-14 23:57:23,529 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:23,529 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:23,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 23:57:23,530 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:23,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:23,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1761953542, now seen corresponding path program 1 times [2020-10-14 23:57:23,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:23,531 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [373428410] [2020-10-14 23:57:23,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:23,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:23,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:23,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:23,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:23,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 23:57:23,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:57:23,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 113 [2020-10-14 23:57:23,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:23,653 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:23,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 23:57:23,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:23,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-14 23:57:23,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:23,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:23,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:23,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:23,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:23,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:23,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:23,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:57:23,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:23,719 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:23,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:23,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:23,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:23,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:23,725 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:57:23,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [373428410] [2020-10-14 23:57:23,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:23,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 23:57:23,726 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643993708] [2020-10-14 23:57:23,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 23:57:23,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:23,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 23:57:23,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 23:57:23,728 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand 5 states. [2020-10-14 23:57:23,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:23,827 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2020-10-14 23:57:23,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 23:57:23,828 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-14 23:57:23,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:23,829 INFO L225 Difference]: With dead ends: 39 [2020-10-14 23:57:23,829 INFO L226 Difference]: Without dead ends: 30 [2020-10-14 23:57:23,830 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:57:23,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-14 23:57:23,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2020-10-14 23:57:23,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-14 23:57:23,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2020-10-14 23:57:23,843 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 16 [2020-10-14 23:57:23,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:23,844 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2020-10-14 23:57:23,844 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 23:57:23,844 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2020-10-14 23:57:23,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-14 23:57:23,846 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:23,847 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:23,847 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 23:57:23,848 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:23,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:23,848 INFO L82 PathProgramCache]: Analyzing trace with hash -2144225578, now seen corresponding path program 1 times [2020-10-14 23:57:23,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:23,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1029225914] [2020-10-14 23:57:23,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:23,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:23,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:23,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:23,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:23,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-14 23:57:23,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:57:23,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 116 [2020-10-14 23:57:23,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:23,985 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:23,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 23:57:23,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:57:23,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 23:57:23,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:24,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:24,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:24,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:24,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:24,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:24,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:24,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:57:24,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:24,029 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:24,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:24,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:24,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:24,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:24,035 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:57:24,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1029225914] [2020-10-14 23:57:24,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:24,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-14 23:57:24,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267561250] [2020-10-14 23:57:24,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 23:57:24,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:24,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 23:57:24,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 23:57:24,038 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 4 states. [2020-10-14 23:57:24,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:24,078 INFO L93 Difference]: Finished difference Result 41 states and 54 transitions. [2020-10-14 23:57:24,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 23:57:24,079 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-14 23:57:24,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:24,080 INFO L225 Difference]: With dead ends: 41 [2020-10-14 23:57:24,080 INFO L226 Difference]: Without dead ends: 36 [2020-10-14 23:57:24,081 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 23:57:24,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-14 23:57:24,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 31. [2020-10-14 23:57:24,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-14 23:57:24,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2020-10-14 23:57:24,089 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 17 [2020-10-14 23:57:24,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:24,089 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2020-10-14 23:57:24,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 23:57:24,089 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2020-10-14 23:57:24,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-14 23:57:24,090 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:24,090 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:24,091 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 23:57:24,091 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:24,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:24,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1176858987, now seen corresponding path program 2 times [2020-10-14 23:57:24,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:24,092 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1781947500] [2020-10-14 23:57:24,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:24,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:24,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:24,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:24,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:24,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:24,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-14 23:57:24,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:57:24,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 149 [2020-10-14 23:57:24,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:24,249 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:24,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 23:57:24,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:24,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 23:57:24,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:24,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:24,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:24,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:24,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:24,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:24,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:24,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:57:24,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:24,307 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:24,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:24,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:24,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:24,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:24,310 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:57:24,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1781947500] [2020-10-14 23:57:24,310 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:24,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 23:57:24,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804440595] [2020-10-14 23:57:24,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 23:57:24,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:24,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 23:57:24,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:57:24,312 INFO L87 Difference]: Start difference. First operand 31 states and 41 transitions. Second operand 6 states. [2020-10-14 23:57:24,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:24,375 INFO L93 Difference]: Finished difference Result 69 states and 101 transitions. [2020-10-14 23:57:24,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 23:57:24,376 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-14 23:57:24,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:24,377 INFO L225 Difference]: With dead ends: 69 [2020-10-14 23:57:24,377 INFO L226 Difference]: Without dead ends: 60 [2020-10-14 23:57:24,378 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:57:24,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-14 23:57:24,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 44. [2020-10-14 23:57:24,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-14 23:57:24,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 62 transitions. [2020-10-14 23:57:24,388 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 62 transitions. Word has length 17 [2020-10-14 23:57:24,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:24,389 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 62 transitions. [2020-10-14 23:57:24,389 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 23:57:24,389 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 62 transitions. [2020-10-14 23:57:24,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-14 23:57:24,390 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:24,390 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:24,390 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 23:57:24,390 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:24,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:24,391 INFO L82 PathProgramCache]: Analyzing trace with hash -2010945700, now seen corresponding path program 1 times [2020-10-14 23:57:24,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:24,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1209813245] [2020-10-14 23:57:24,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:24,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:24,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:24,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:24,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:24,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:24,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:24,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-14 23:57:24,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:57:24,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 452 [2020-10-14 23:57:24,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:24,858 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:24,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 23:57:24,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:24,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 23:57:24,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 23:57:25,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:25,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:25,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:25,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:25,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:25,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:25,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:57:25,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:25,096 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:25,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:25,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:25,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:25,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:25,105 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 23:57:25,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1209813245] [2020-10-14 23:57:25,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:25,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 23:57:25,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563694737] [2020-10-14 23:57:25,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 23:57:25,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:25,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 23:57:25,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:57:25,108 INFO L87 Difference]: Start difference. First operand 44 states and 62 transitions. Second operand 9 states. [2020-10-14 23:57:27,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:27,588 INFO L93 Difference]: Finished difference Result 65 states and 87 transitions. [2020-10-14 23:57:27,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 23:57:27,589 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2020-10-14 23:57:27,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:27,590 INFO L225 Difference]: With dead ends: 65 [2020-10-14 23:57:27,590 INFO L226 Difference]: Without dead ends: 51 [2020-10-14 23:57:27,591 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:57:27,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-14 23:57:27,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2020-10-14 23:57:27,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-14 23:57:27,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 65 transitions. [2020-10-14 23:57:27,600 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 65 transitions. Word has length 18 [2020-10-14 23:57:27,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:27,600 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 65 transitions. [2020-10-14 23:57:27,600 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 23:57:27,601 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 65 transitions. [2020-10-14 23:57:27,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-14 23:57:27,601 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:27,602 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:27,602 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 23:57:27,602 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:27,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:27,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1109756806, now seen corresponding path program 2 times [2020-10-14 23:57:27,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:27,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [292299646] [2020-10-14 23:57:27,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:27,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:27,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:27,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:27,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:27,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:27,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-14 23:57:27,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:57:27,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 340 [2020-10-14 23:57:27,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:27,952 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:27,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 23:57:27,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 23:57:27,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 23:57:27,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:28,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:28,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:28,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:28,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:28,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:28,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:28,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:57:28,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:28,007 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:28,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:28,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:28,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:28,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:28,011 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 23:57:28,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [292299646] [2020-10-14 23:57:28,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:28,015 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 23:57:28,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344280666] [2020-10-14 23:57:28,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 23:57:28,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:28,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 23:57:28,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 23:57:28,018 INFO L87 Difference]: Start difference. First operand 47 states and 65 transitions. Second operand 5 states. [2020-10-14 23:57:28,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:28,076 INFO L93 Difference]: Finished difference Result 75 states and 103 transitions. [2020-10-14 23:57:28,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 23:57:28,077 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-10-14 23:57:28,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:28,078 INFO L225 Difference]: With dead ends: 75 [2020-10-14 23:57:28,078 INFO L226 Difference]: Without dead ends: 69 [2020-10-14 23:57:28,079 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 23:57:28,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-14 23:57:28,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2020-10-14 23:57:28,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-14 23:57:28,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 90 transitions. [2020-10-14 23:57:28,102 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 90 transitions. Word has length 18 [2020-10-14 23:57:28,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:28,102 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 90 transitions. [2020-10-14 23:57:28,102 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 23:57:28,102 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 90 transitions. [2020-10-14 23:57:28,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-14 23:57:28,109 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:28,109 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:28,110 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 23:57:28,110 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:28,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:28,110 INFO L82 PathProgramCache]: Analyzing trace with hash -684524052, now seen corresponding path program 3 times [2020-10-14 23:57:28,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:28,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [72861369] [2020-10-14 23:57:28,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:28,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:28,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:28,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:28,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:28,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-14 23:57:28,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:57:28,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 109 [2020-10-14 23:57:28,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:28,231 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:28,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 23:57:28,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:28,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 23:57:28,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:28,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:28,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:28,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:28,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:28,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:28,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:28,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:57:28,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:28,293 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:28,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:28,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:28,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:28,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:28,297 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 23:57:28,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [72861369] [2020-10-14 23:57:28,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:28,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 23:57:28,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824739410] [2020-10-14 23:57:28,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 23:57:28,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:28,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 23:57:28,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:57:28,299 INFO L87 Difference]: Start difference. First operand 66 states and 90 transitions. Second operand 6 states. [2020-10-14 23:57:28,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:28,396 INFO L93 Difference]: Finished difference Result 82 states and 108 transitions. [2020-10-14 23:57:28,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 23:57:28,397 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-14 23:57:28,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:28,398 INFO L225 Difference]: With dead ends: 82 [2020-10-14 23:57:28,398 INFO L226 Difference]: Without dead ends: 73 [2020-10-14 23:57:28,399 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:57:28,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-14 23:57:28,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 63. [2020-10-14 23:57:28,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-14 23:57:28,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 86 transitions. [2020-10-14 23:57:28,428 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 86 transitions. Word has length 18 [2020-10-14 23:57:28,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:28,429 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 86 transitions. [2020-10-14 23:57:28,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 23:57:28,436 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 86 transitions. [2020-10-14 23:57:28,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-14 23:57:28,447 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:28,447 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:28,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 23:57:28,448 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:28,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:28,448 INFO L82 PathProgramCache]: Analyzing trace with hash -218796966, now seen corresponding path program 4 times [2020-10-14 23:57:28,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:28,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [341123210] [2020-10-14 23:57:28,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:28,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:28,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:28,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:28,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:28,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:28,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-14 23:57:28,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:57:28,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 207 [2020-10-14 23:57:28,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:28,665 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:28,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:57:28,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:28,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 23:57:28,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:28,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:28,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:28,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:28,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:28,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:28,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:28,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:57:28,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:28,743 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:28,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:28,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:28,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:28,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:28,745 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:57:28,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [341123210] [2020-10-14 23:57:28,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:28,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 23:57:28,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232821629] [2020-10-14 23:57:28,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 23:57:28,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:28,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 23:57:28,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:57:28,748 INFO L87 Difference]: Start difference. First operand 63 states and 86 transitions. Second operand 7 states. [2020-10-14 23:57:28,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:28,845 INFO L93 Difference]: Finished difference Result 114 states and 166 transitions. [2020-10-14 23:57:28,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 23:57:28,846 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-10-14 23:57:28,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:28,847 INFO L225 Difference]: With dead ends: 114 [2020-10-14 23:57:28,847 INFO L226 Difference]: Without dead ends: 101 [2020-10-14 23:57:28,848 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:57:28,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-14 23:57:28,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 76. [2020-10-14 23:57:28,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-14 23:57:28,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 104 transitions. [2020-10-14 23:57:28,860 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 104 transitions. Word has length 18 [2020-10-14 23:57:28,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:28,860 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 104 transitions. [2020-10-14 23:57:28,861 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 23:57:28,861 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 104 transitions. [2020-10-14 23:57:28,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-14 23:57:28,861 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:28,862 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:28,862 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 23:57:28,862 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:28,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:28,862 INFO L82 PathProgramCache]: Analyzing trace with hash 894004054, now seen corresponding path program 3 times [2020-10-14 23:57:28,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:28,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [37552072] [2020-10-14 23:57:28,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:28,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:28,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:28,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:28,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:29,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:29,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-14 23:57:29,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:57:29,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 318 [2020-10-14 23:57:29,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:29,189 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:29,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 23:57:29,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 23:57:29,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 23:57:29,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:29,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:29,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:29,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:29,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:29,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:29,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:29,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:57:29,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:29,249 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:29,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:29,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:29,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:29,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:29,252 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 23:57:29,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [37552072] [2020-10-14 23:57:29,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:29,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 23:57:29,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134365625] [2020-10-14 23:57:29,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 23:57:29,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:29,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 23:57:29,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:57:29,254 INFO L87 Difference]: Start difference. First operand 76 states and 104 transitions. Second operand 6 states. [2020-10-14 23:57:29,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:29,335 INFO L93 Difference]: Finished difference Result 103 states and 142 transitions. [2020-10-14 23:57:29,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 23:57:29,335 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-10-14 23:57:29,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:29,336 INFO L225 Difference]: With dead ends: 103 [2020-10-14 23:57:29,336 INFO L226 Difference]: Without dead ends: 97 [2020-10-14 23:57:29,337 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:57:29,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-14 23:57:29,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 88. [2020-10-14 23:57:29,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-14 23:57:29,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 122 transitions. [2020-10-14 23:57:29,350 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 122 transitions. Word has length 19 [2020-10-14 23:57:29,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:29,350 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 122 transitions. [2020-10-14 23:57:29,351 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 23:57:29,351 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 122 transitions. [2020-10-14 23:57:29,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-14 23:57:29,351 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:29,352 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:29,352 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 23:57:29,352 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:29,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:29,352 INFO L82 PathProgramCache]: Analyzing trace with hash -583645387, now seen corresponding path program 5 times [2020-10-14 23:57:29,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:29,353 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [450520555] [2020-10-14 23:57:29,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:29,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:29,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:29,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:29,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:29,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:29,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-14 23:57:29,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:57:29,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 214 [2020-10-14 23:57:29,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:29,577 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:29,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 23:57:29,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:29,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 23:57:29,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:29,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:29,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:29,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:29,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:29,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:29,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:29,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:57:29,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:29,684 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:29,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:29,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:29,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:29,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:29,686 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:57:29,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [450520555] [2020-10-14 23:57:29,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:29,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 23:57:29,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859393784] [2020-10-14 23:57:29,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 23:57:29,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:29,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 23:57:29,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:57:29,690 INFO L87 Difference]: Start difference. First operand 88 states and 122 transitions. Second operand 8 states. [2020-10-14 23:57:29,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:29,854 INFO L93 Difference]: Finished difference Result 138 states and 198 transitions. [2020-10-14 23:57:29,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 23:57:29,855 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-10-14 23:57:29,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:29,856 INFO L225 Difference]: With dead ends: 138 [2020-10-14 23:57:29,856 INFO L226 Difference]: Without dead ends: 122 [2020-10-14 23:57:29,857 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:57:29,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-14 23:57:29,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 88. [2020-10-14 23:57:29,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-14 23:57:29,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 121 transitions. [2020-10-14 23:57:29,870 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 121 transitions. Word has length 19 [2020-10-14 23:57:29,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:29,871 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 121 transitions. [2020-10-14 23:57:29,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 23:57:29,871 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 121 transitions. [2020-10-14 23:57:29,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 23:57:29,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:29,872 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:29,872 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 23:57:29,872 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:29,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:29,873 INFO L82 PathProgramCache]: Analyzing trace with hash -187192262, now seen corresponding path program 2 times [2020-10-14 23:57:29,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:29,873 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1811227476] [2020-10-14 23:57:29,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:29,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:29,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:29,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:30,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:30,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 23:57:30,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:57:30,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 155 [2020-10-14 23:57:30,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:30,036 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:30,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 23:57:30,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:30,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 23:57:30,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:30,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:30,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:30,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:30,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:30,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:30,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:30,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:57:30,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:30,097 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:30,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:30,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:30,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:30,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:30,100 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 23:57:30,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1811227476] [2020-10-14 23:57:30,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:30,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 23:57:30,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607728533] [2020-10-14 23:57:30,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 23:57:30,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:30,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 23:57:30,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:57:30,102 INFO L87 Difference]: Start difference. First operand 88 states and 121 transitions. Second operand 6 states. [2020-10-14 23:57:30,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:30,171 INFO L93 Difference]: Finished difference Result 100 states and 133 transitions. [2020-10-14 23:57:30,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 23:57:30,172 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-14 23:57:30,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:30,173 INFO L225 Difference]: With dead ends: 100 [2020-10-14 23:57:30,173 INFO L226 Difference]: Without dead ends: 76 [2020-10-14 23:57:30,174 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:57:30,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-14 23:57:30,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-10-14 23:57:30,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-14 23:57:30,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 104 transitions. [2020-10-14 23:57:30,184 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 104 transitions. Word has length 20 [2020-10-14 23:57:30,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:30,184 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 104 transitions. [2020-10-14 23:57:30,184 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 23:57:30,184 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 104 transitions. [2020-10-14 23:57:30,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 23:57:30,185 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:30,185 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:30,185 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 23:57:30,185 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:30,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:30,186 INFO L82 PathProgramCache]: Analyzing trace with hash -61628532, now seen corresponding path program 3 times [2020-10-14 23:57:30,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:30,186 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [662151363] [2020-10-14 23:57:30,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:30,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:30,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:30,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:30,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:30,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 23:57:30,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:57:30,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 230 [2020-10-14 23:57:30,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:30,425 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:30,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:57:30,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:30,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 23:57:30,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:30,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:30,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:30,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:30,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:30,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:30,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:30,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:57:30,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:30,516 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:30,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:30,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:30,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:30,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:30,520 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 23:57:30,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [662151363] [2020-10-14 23:57:30,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:30,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 23:57:30,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057055625] [2020-10-14 23:57:30,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 23:57:30,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:30,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 23:57:30,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:57:30,523 INFO L87 Difference]: Start difference. First operand 76 states and 104 transitions. Second operand 7 states. [2020-10-14 23:57:30,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:30,662 INFO L93 Difference]: Finished difference Result 105 states and 135 transitions. [2020-10-14 23:57:30,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 23:57:30,664 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-10-14 23:57:30,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:30,665 INFO L225 Difference]: With dead ends: 105 [2020-10-14 23:57:30,665 INFO L226 Difference]: Without dead ends: 95 [2020-10-14 23:57:30,666 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:57:30,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-14 23:57:30,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 76. [2020-10-14 23:57:30,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-14 23:57:30,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 103 transitions. [2020-10-14 23:57:30,680 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 103 transitions. Word has length 20 [2020-10-14 23:57:30,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:30,681 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 103 transitions. [2020-10-14 23:57:30,681 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 23:57:30,681 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 103 transitions. [2020-10-14 23:57:30,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 23:57:30,682 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:30,682 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:30,683 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 23:57:30,683 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:30,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:30,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1027409414, now seen corresponding path program 6 times [2020-10-14 23:57:30,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:30,684 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1589616652] [2020-10-14 23:57:30,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:30,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:30,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:30,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:30,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:30,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 23:57:30,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:57:30,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 148 [2020-10-14 23:57:30,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:30,844 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:30,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:57:30,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:30,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 23:57:30,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:30,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:30,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:30,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:30,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:30,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:30,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:30,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:57:30,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:30,914 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:30,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:30,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:30,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:30,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:30,916 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-14 23:57:30,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1589616652] [2020-10-14 23:57:30,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:30,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 23:57:30,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457884732] [2020-10-14 23:57:30,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 23:57:30,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:30,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 23:57:30,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:57:30,918 INFO L87 Difference]: Start difference. First operand 76 states and 103 transitions. Second operand 7 states. [2020-10-14 23:57:31,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:31,042 INFO L93 Difference]: Finished difference Result 112 states and 142 transitions. [2020-10-14 23:57:31,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 23:57:31,043 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-10-14 23:57:31,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:31,044 INFO L225 Difference]: With dead ends: 112 [2020-10-14 23:57:31,044 INFO L226 Difference]: Without dead ends: 102 [2020-10-14 23:57:31,045 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:57:31,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-14 23:57:31,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 72. [2020-10-14 23:57:31,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-14 23:57:31,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 98 transitions. [2020-10-14 23:57:31,065 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 98 transitions. Word has length 20 [2020-10-14 23:57:31,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:31,065 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 98 transitions. [2020-10-14 23:57:31,065 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 23:57:31,065 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 98 transitions. [2020-10-14 23:57:31,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 23:57:31,066 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:31,066 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:31,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 23:57:31,067 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:31,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:31,067 INFO L82 PathProgramCache]: Analyzing trace with hash 990955450, now seen corresponding path program 7 times [2020-10-14 23:57:31,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:31,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [826477163] [2020-10-14 23:57:31,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:31,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:31,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:31,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:31,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:31,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:31,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 23:57:31,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:57:31,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 376 [2020-10-14 23:57:31,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:31,457 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:31,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 23:57:31,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:31,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 23:57:31,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:31,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:31,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:31,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:31,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:31,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:31,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:31,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:57:31,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:31,567 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:31,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:31,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:31,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:31,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:31,570 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:57:31,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [826477163] [2020-10-14 23:57:31,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:31,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 23:57:31,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910260854] [2020-10-14 23:57:31,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 23:57:31,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:31,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 23:57:31,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:57:31,573 INFO L87 Difference]: Start difference. First operand 72 states and 98 transitions. Second operand 9 states. [2020-10-14 23:57:31,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:31,744 INFO L93 Difference]: Finished difference Result 157 states and 240 transitions. [2020-10-14 23:57:31,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 23:57:31,746 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2020-10-14 23:57:31,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:31,748 INFO L225 Difference]: With dead ends: 157 [2020-10-14 23:57:31,749 INFO L226 Difference]: Without dead ends: 142 [2020-10-14 23:57:31,750 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:57:31,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-14 23:57:31,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 100. [2020-10-14 23:57:31,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-14 23:57:31,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 138 transitions. [2020-10-14 23:57:31,773 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 138 transitions. Word has length 20 [2020-10-14 23:57:31,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:31,777 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 138 transitions. [2020-10-14 23:57:31,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 23:57:31,777 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 138 transitions. [2020-10-14 23:57:31,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-14 23:57:31,778 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:31,779 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:31,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 23:57:31,779 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:31,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:31,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1736026155, now seen corresponding path program 8 times [2020-10-14 23:57:31,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:31,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1506265430] [2020-10-14 23:57:31,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:31,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:31,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:31,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:31,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:32,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:32,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-14 23:57:32,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:57:32,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 567 [2020-10-14 23:57:32,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:32,357 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:32,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 23:57:32,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:32,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 23:57:32,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:32,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:32,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:32,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:32,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:32,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:32,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:32,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:57:32,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:32,477 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:32,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:32,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:32,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:32,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:32,479 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:57:32,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1506265430] [2020-10-14 23:57:32,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:32,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 23:57:32,481 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928383461] [2020-10-14 23:57:32,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 23:57:32,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:32,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 23:57:32,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:57:32,487 INFO L87 Difference]: Start difference. First operand 100 states and 138 transitions. Second operand 10 states. [2020-10-14 23:57:32,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:32,746 INFO L93 Difference]: Finished difference Result 161 states and 235 transitions. [2020-10-14 23:57:32,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 23:57:32,746 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2020-10-14 23:57:32,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:32,748 INFO L225 Difference]: With dead ends: 161 [2020-10-14 23:57:32,748 INFO L226 Difference]: Without dead ends: 145 [2020-10-14 23:57:32,749 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:57:32,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-14 23:57:32,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 100. [2020-10-14 23:57:32,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-14 23:57:32,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 137 transitions. [2020-10-14 23:57:32,766 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 137 transitions. Word has length 21 [2020-10-14 23:57:32,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:32,766 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 137 transitions. [2020-10-14 23:57:32,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 23:57:32,766 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 137 transitions. [2020-10-14 23:57:32,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 23:57:32,767 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:32,767 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:32,767 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 23:57:32,768 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:32,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:32,768 INFO L82 PathProgramCache]: Analyzing trace with hash -611178388, now seen corresponding path program 4 times [2020-10-14 23:57:32,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:32,768 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1984084136] [2020-10-14 23:57:32,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:32,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:32,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:32,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:33,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:33,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:33,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:33,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 23:57:33,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:57:33,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 707 [2020-10-14 23:57:33,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:33,499 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:33,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 23:57:33,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:33,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 23:57:33,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:33,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:33,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:33,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:33,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:33,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:33,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:33,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:57:33,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:33,773 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:33,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:33,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:33,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:33,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:33,776 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-14 23:57:33,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1984084136] [2020-10-14 23:57:33,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:33,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 23:57:33,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104956855] [2020-10-14 23:57:33,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 23:57:33,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:33,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 23:57:33,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:57:33,779 INFO L87 Difference]: Start difference. First operand 100 states and 137 transitions. Second operand 11 states. [2020-10-14 23:57:34,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:34,277 INFO L93 Difference]: Finished difference Result 126 states and 166 transitions. [2020-10-14 23:57:34,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 23:57:34,279 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 22 [2020-10-14 23:57:34,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:34,281 INFO L225 Difference]: With dead ends: 126 [2020-10-14 23:57:34,282 INFO L226 Difference]: Without dead ends: 114 [2020-10-14 23:57:34,283 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2020-10-14 23:57:34,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-14 23:57:34,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 109. [2020-10-14 23:57:34,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-14 23:57:34,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 147 transitions. [2020-10-14 23:57:34,301 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 147 transitions. Word has length 22 [2020-10-14 23:57:34,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:34,302 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 147 transitions. [2020-10-14 23:57:34,302 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 23:57:34,302 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 147 transitions. [2020-10-14 23:57:34,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 23:57:34,303 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:34,304 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:34,304 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 23:57:34,304 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:34,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:34,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1112398132, now seen corresponding path program 5 times [2020-10-14 23:57:34,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:34,305 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [632873845] [2020-10-14 23:57:34,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:34,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:34,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:34,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:34,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:34,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:35,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:35,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 23:57:35,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:57:35,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1165 [2020-10-14 23:57:35,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:35,491 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:35,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:57:35,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 23:57:35,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 23:57:35,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:35,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:35,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:35,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:35,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:35,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:35,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:35,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:57:35,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:35,578 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:35,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:35,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:35,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:35,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:35,580 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-14 23:57:35,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [632873845] [2020-10-14 23:57:35,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:35,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 23:57:35,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727245005] [2020-10-14 23:57:35,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 23:57:35,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:35,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 23:57:35,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:57:35,582 INFO L87 Difference]: Start difference. First operand 109 states and 147 transitions. Second operand 7 states. [2020-10-14 23:57:35,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:35,667 INFO L93 Difference]: Finished difference Result 142 states and 194 transitions. [2020-10-14 23:57:35,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 23:57:35,667 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-10-14 23:57:35,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:35,668 INFO L225 Difference]: With dead ends: 142 [2020-10-14 23:57:35,669 INFO L226 Difference]: Without dead ends: 136 [2020-10-14 23:57:35,669 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:57:35,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-14 23:57:35,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 124. [2020-10-14 23:57:35,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-14 23:57:35,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 169 transitions. [2020-10-14 23:57:35,686 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 169 transitions. Word has length 22 [2020-10-14 23:57:35,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:35,686 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 169 transitions. [2020-10-14 23:57:35,686 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 23:57:35,686 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 169 transitions. [2020-10-14 23:57:35,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 23:57:35,687 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:35,688 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:35,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 23:57:35,688 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:35,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:35,688 INFO L82 PathProgramCache]: Analyzing trace with hash 25976860, now seen corresponding path program 6 times [2020-10-14 23:57:35,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:35,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [996038887] [2020-10-14 23:57:35,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:35,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:35,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:35,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:35,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:35,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 23:57:35,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:57:35,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 285 [2020-10-14 23:57:35,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:35,984 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:35,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 23:57:35,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:35,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 23:57:35,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:36,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:36,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:36,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:36,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:36,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:36,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:36,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:57:36,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:36,070 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:36,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:36,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:36,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:36,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:36,073 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-14 23:57:36,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [996038887] [2020-10-14 23:57:36,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:36,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 23:57:36,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909841598] [2020-10-14 23:57:36,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 23:57:36,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:36,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 23:57:36,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:57:36,076 INFO L87 Difference]: Start difference. First operand 124 states and 169 transitions. Second operand 8 states. [2020-10-14 23:57:36,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:36,291 INFO L93 Difference]: Finished difference Result 168 states and 216 transitions. [2020-10-14 23:57:36,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 23:57:36,292 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-10-14 23:57:36,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:36,294 INFO L225 Difference]: With dead ends: 168 [2020-10-14 23:57:36,294 INFO L226 Difference]: Without dead ends: 157 [2020-10-14 23:57:36,295 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:57:36,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-14 23:57:36,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 124. [2020-10-14 23:57:36,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-14 23:57:36,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 168 transitions. [2020-10-14 23:57:36,319 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 168 transitions. Word has length 22 [2020-10-14 23:57:36,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:36,319 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 168 transitions. [2020-10-14 23:57:36,319 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 23:57:36,320 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 168 transitions. [2020-10-14 23:57:36,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 23:57:36,321 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:36,324 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:36,324 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 23:57:36,324 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:36,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:36,325 INFO L82 PathProgramCache]: Analyzing trace with hash -373109990, now seen corresponding path program 9 times [2020-10-14 23:57:36,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:36,327 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1695411748] [2020-10-14 23:57:36,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:36,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:36,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:36,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:36,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:36,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:36,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 23:57:36,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:57:36,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 596 [2020-10-14 23:57:36,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:36,937 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:36,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 23:57:36,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:36,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 23:57:36,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:37,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:37,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:37,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:37,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:37,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:37,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:37,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:57:37,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:37,104 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:37,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:37,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:37,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:37,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:37,107 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:57:37,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1695411748] [2020-10-14 23:57:37,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:37,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 23:57:37,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250204139] [2020-10-14 23:57:37,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 23:57:37,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:37,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 23:57:37,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:57:37,109 INFO L87 Difference]: Start difference. First operand 124 states and 168 transitions. Second operand 11 states. [2020-10-14 23:57:37,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:37,391 INFO L93 Difference]: Finished difference Result 241 states and 366 transitions. [2020-10-14 23:57:37,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 23:57:37,394 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 22 [2020-10-14 23:57:37,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:37,395 INFO L225 Difference]: With dead ends: 241 [2020-10-14 23:57:37,395 INFO L226 Difference]: Without dead ends: 224 [2020-10-14 23:57:37,396 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:57:37,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-14 23:57:37,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 152. [2020-10-14 23:57:37,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-14 23:57:37,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 210 transitions. [2020-10-14 23:57:37,415 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 210 transitions. Word has length 22 [2020-10-14 23:57:37,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:37,415 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 210 transitions. [2020-10-14 23:57:37,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 23:57:37,415 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 210 transitions. [2020-10-14 23:57:37,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-14 23:57:37,416 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:37,416 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:37,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 23:57:37,416 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:37,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:37,417 INFO L82 PathProgramCache]: Analyzing trace with hash -590285690, now seen corresponding path program 7 times [2020-10-14 23:57:37,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:37,421 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [413654947] [2020-10-14 23:57:37,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:37,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:37,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:37,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:37,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:39,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:39,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-14 23:57:39,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:57:39,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1586 [2020-10-14 23:57:39,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:39,018 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:39,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 23:57:39,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 23:57:39,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 23:57:39,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 20 [2020-10-14 23:57:39,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:39,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:39,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:39,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:39,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:39,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:39,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:57:39,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:39,136 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:39,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:39,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:39,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:39,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:39,139 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-14 23:57:39,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [413654947] [2020-10-14 23:57:39,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:39,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 23:57:39,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363570797] [2020-10-14 23:57:39,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 23:57:39,140 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:39,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 23:57:39,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:57:39,141 INFO L87 Difference]: Start difference. First operand 152 states and 210 transitions. Second operand 8 states. [2020-10-14 23:57:39,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:39,283 INFO L93 Difference]: Finished difference Result 190 states and 265 transitions. [2020-10-14 23:57:39,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 23:57:39,284 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-10-14 23:57:39,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:39,285 INFO L225 Difference]: With dead ends: 190 [2020-10-14 23:57:39,285 INFO L226 Difference]: Without dead ends: 184 [2020-10-14 23:57:39,285 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:57:39,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-14 23:57:39,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 171. [2020-10-14 23:57:39,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-14 23:57:39,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 238 transitions. [2020-10-14 23:57:39,306 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 238 transitions. Word has length 23 [2020-10-14 23:57:39,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:39,306 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 238 transitions. [2020-10-14 23:57:39,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 23:57:39,307 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 238 transitions. [2020-10-14 23:57:39,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-14 23:57:39,307 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:39,307 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:39,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 23:57:39,308 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:39,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:39,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1072381835, now seen corresponding path program 10 times [2020-10-14 23:57:39,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:39,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1144901259] [2020-10-14 23:57:39,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:39,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:39,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:39,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:39,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:39,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:39,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-14 23:57:39,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:57:39,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 447 [2020-10-14 23:57:39,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:39,766 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:39,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 23:57:39,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:39,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 23:57:39,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:39,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:39,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:39,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:39,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:39,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:39,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:39,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:57:39,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:39,917 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:39,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:39,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:39,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:39,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:39,919 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:57:39,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1144901259] [2020-10-14 23:57:39,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:39,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 23:57:39,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488955633] [2020-10-14 23:57:39,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 23:57:39,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:39,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 23:57:39,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:57:39,921 INFO L87 Difference]: Start difference. First operand 171 states and 238 transitions. Second operand 12 states. [2020-10-14 23:57:40,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:40,234 INFO L93 Difference]: Finished difference Result 300 states and 454 transitions. [2020-10-14 23:57:40,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 23:57:40,235 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2020-10-14 23:57:40,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:40,237 INFO L225 Difference]: With dead ends: 300 [2020-10-14 23:57:40,237 INFO L226 Difference]: Without dead ends: 281 [2020-10-14 23:57:40,238 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:57:40,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-10-14 23:57:40,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 187. [2020-10-14 23:57:40,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-10-14 23:57:40,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 262 transitions. [2020-10-14 23:57:40,262 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 262 transitions. Word has length 23 [2020-10-14 23:57:40,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:40,262 INFO L479 AbstractCegarLoop]: Abstraction has 187 states and 262 transitions. [2020-10-14 23:57:40,263 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 23:57:40,263 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 262 transitions. [2020-10-14 23:57:40,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 23:57:40,263 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:40,264 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:40,264 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 23:57:40,264 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:40,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:40,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1569460748, now seen corresponding path program 8 times [2020-10-14 23:57:40,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:40,265 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1085072807] [2020-10-14 23:57:40,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:40,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:40,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:40,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:40,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:40,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 23:57:40,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:57:40,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 433 [2020-10-14 23:57:40,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:40,709 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:40,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 23:57:40,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 23:57:40,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 23:57:40,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:43,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:43,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:43,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:43,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:43,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:43,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:43,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:57:43,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:43,022 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:43,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:43,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:43,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:43,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:43,025 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-14 23:57:43,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1085072807] [2020-10-14 23:57:43,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:43,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 23:57:43,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311198408] [2020-10-14 23:57:43,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 23:57:43,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:43,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 23:57:43,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=38, Unknown=1, NotChecked=0, Total=56 [2020-10-14 23:57:43,027 INFO L87 Difference]: Start difference. First operand 187 states and 262 transitions. Second operand 8 states. [2020-10-14 23:57:47,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:47,657 INFO L93 Difference]: Finished difference Result 289 states and 377 transitions. [2020-10-14 23:57:47,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 23:57:47,658 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-10-14 23:57:47,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:47,660 INFO L225 Difference]: With dead ends: 289 [2020-10-14 23:57:47,660 INFO L226 Difference]: Without dead ends: 254 [2020-10-14 23:57:47,661 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=22, Invalid=49, Unknown=1, NotChecked=0, Total=72 [2020-10-14 23:57:47,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-10-14 23:57:47,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 168. [2020-10-14 23:57:47,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-14 23:57:47,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 227 transitions. [2020-10-14 23:57:47,684 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 227 transitions. Word has length 24 [2020-10-14 23:57:47,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:47,684 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 227 transitions. [2020-10-14 23:57:47,684 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 23:57:47,684 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 227 transitions. [2020-10-14 23:57:47,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 23:57:47,685 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:47,685 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:47,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 23:57:47,686 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:47,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:47,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1859614010, now seen corresponding path program 9 times [2020-10-14 23:57:47,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:47,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [762741623] [2020-10-14 23:57:47,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:47,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:47,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:47,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:48,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:48,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 23:57:48,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:57:48,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 631 [2020-10-14 23:57:48,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:48,330 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:48,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 23:57:48,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:48,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 23:57:48,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:48,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:48,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:48,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:48,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:48,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:48,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:48,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:57:48,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:48,436 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:48,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:48,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:48,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:48,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:48,438 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-14 23:57:48,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [762741623] [2020-10-14 23:57:48,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:48,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 23:57:48,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408958888] [2020-10-14 23:57:48,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 23:57:48,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:48,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 23:57:48,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:57:48,441 INFO L87 Difference]: Start difference. First operand 168 states and 227 transitions. Second operand 9 states. [2020-10-14 23:57:48,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:48,620 INFO L93 Difference]: Finished difference Result 213 states and 275 transitions. [2020-10-14 23:57:48,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 23:57:48,621 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-10-14 23:57:48,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:48,623 INFO L225 Difference]: With dead ends: 213 [2020-10-14 23:57:48,623 INFO L226 Difference]: Without dead ends: 201 [2020-10-14 23:57:48,624 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:57:48,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-14 23:57:48,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 168. [2020-10-14 23:57:48,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-14 23:57:48,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 226 transitions. [2020-10-14 23:57:48,648 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 226 transitions. Word has length 24 [2020-10-14 23:57:48,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:48,648 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 226 transitions. [2020-10-14 23:57:48,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 23:57:48,649 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 226 transitions. [2020-10-14 23:57:48,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 23:57:48,649 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:48,649 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:48,650 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-14 23:57:48,650 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:48,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:48,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1176237132, now seen corresponding path program 10 times [2020-10-14 23:57:48,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:48,651 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [853915880] [2020-10-14 23:57:48,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:48,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:48,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:48,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:48,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:48,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 23:57:48,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:57:48,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 333 [2020-10-14 23:57:48,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:48,996 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:48,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 23:57:48,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:48,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 23:57:48,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:49,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:49,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:49,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:49,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:49,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:49,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:49,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:57:49,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:49,110 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:49,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:49,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:49,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:49,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:49,114 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-14 23:57:49,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [853915880] [2020-10-14 23:57:49,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:49,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 23:57:49,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956603054] [2020-10-14 23:57:49,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 23:57:49,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:49,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 23:57:49,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:57:49,116 INFO L87 Difference]: Start difference. First operand 168 states and 226 transitions. Second operand 9 states. [2020-10-14 23:57:49,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:49,341 INFO L93 Difference]: Finished difference Result 228 states and 290 transitions. [2020-10-14 23:57:49,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 23:57:49,342 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-10-14 23:57:49,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:49,343 INFO L225 Difference]: With dead ends: 228 [2020-10-14 23:57:49,343 INFO L226 Difference]: Without dead ends: 216 [2020-10-14 23:57:49,344 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:57:49,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-14 23:57:49,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 168. [2020-10-14 23:57:49,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-14 23:57:49,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 225 transitions. [2020-10-14 23:57:49,367 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 225 transitions. Word has length 24 [2020-10-14 23:57:49,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:49,367 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 225 transitions. [2020-10-14 23:57:49,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 23:57:49,367 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 225 transitions. [2020-10-14 23:57:49,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 23:57:49,368 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:49,368 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:49,368 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-14 23:57:49,368 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:49,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:49,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1616753926, now seen corresponding path program 11 times [2020-10-14 23:57:49,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:49,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [223765927] [2020-10-14 23:57:49,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:49,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:49,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:49,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:49,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:49,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 23:57:49,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:57:49,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 194 [2020-10-14 23:57:49,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:49,575 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:49,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 23:57:49,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:49,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 23:57:49,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:49,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:49,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:49,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:49,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:49,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:49,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:49,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:57:49,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:49,672 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:49,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:49,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:49,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:49,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:49,675 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-14 23:57:49,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [223765927] [2020-10-14 23:57:49,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:49,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 23:57:49,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762722280] [2020-10-14 23:57:49,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 23:57:49,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:49,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 23:57:49,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:57:49,677 INFO L87 Difference]: Start difference. First operand 168 states and 225 transitions. Second operand 9 states. [2020-10-14 23:57:49,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:49,866 INFO L93 Difference]: Finished difference Result 243 states and 305 transitions. [2020-10-14 23:57:49,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 23:57:49,867 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-10-14 23:57:49,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:49,868 INFO L225 Difference]: With dead ends: 243 [2020-10-14 23:57:49,869 INFO L226 Difference]: Without dead ends: 231 [2020-10-14 23:57:49,869 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:57:49,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-14 23:57:49,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 168. [2020-10-14 23:57:49,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-14 23:57:49,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 224 transitions. [2020-10-14 23:57:49,894 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 224 transitions. Word has length 24 [2020-10-14 23:57:49,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:49,895 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 224 transitions. [2020-10-14 23:57:49,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 23:57:49,896 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 224 transitions. [2020-10-14 23:57:49,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 23:57:49,896 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:49,896 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:49,897 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-14 23:57:49,897 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:49,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:49,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1274972550, now seen corresponding path program 12 times [2020-10-14 23:57:49,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:49,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1170792619] [2020-10-14 23:57:49,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:49,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:49,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:49,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:49,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:50,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:50,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 23:57:50,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:57:50,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 731 [2020-10-14 23:57:50,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:50,639 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:50,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 23:57:50,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:50,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 23:57:50,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:50,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:50,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:50,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:50,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:50,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:50,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:50,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:57:50,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:50,803 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:50,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:50,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:50,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:50,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:50,806 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:57:50,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1170792619] [2020-10-14 23:57:50,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:50,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 23:57:50,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888410769] [2020-10-14 23:57:50,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 23:57:50,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:50,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 23:57:50,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:57:50,809 INFO L87 Difference]: Start difference. First operand 168 states and 224 transitions. Second operand 13 states. [2020-10-14 23:57:51,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:51,224 INFO L93 Difference]: Finished difference Result 293 states and 420 transitions. [2020-10-14 23:57:51,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 23:57:51,225 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2020-10-14 23:57:51,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:51,227 INFO L225 Difference]: With dead ends: 293 [2020-10-14 23:57:51,227 INFO L226 Difference]: Without dead ends: 273 [2020-10-14 23:57:51,228 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:57:51,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-10-14 23:57:51,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 183. [2020-10-14 23:57:51,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-10-14 23:57:51,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 246 transitions. [2020-10-14 23:57:51,252 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 246 transitions. Word has length 24 [2020-10-14 23:57:51,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:51,252 INFO L479 AbstractCegarLoop]: Abstraction has 183 states and 246 transitions. [2020-10-14 23:57:51,253 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 23:57:51,253 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 246 transitions. [2020-10-14 23:57:51,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-14 23:57:51,253 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:51,253 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:51,254 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-14 23:57:51,254 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:51,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:51,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1034649877, now seen corresponding path program 13 times [2020-10-14 23:57:51,254 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:51,254 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [388585879] [2020-10-14 23:57:51,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:51,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:51,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:51,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:51,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:52,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:52,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-14 23:57:52,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:57:52,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 865 [2020-10-14 23:57:52,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:52,131 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:52,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 23:57:52,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:52,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 23:57:52,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:52,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:52,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:52,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:52,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:52,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:52,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:52,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:57:52,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:52,323 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:52,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:52,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:52,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:52,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:52,326 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:57:52,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [388585879] [2020-10-14 23:57:52,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:52,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 23:57:52,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708108457] [2020-10-14 23:57:52,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 23:57:52,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:52,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 23:57:52,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:57:52,328 INFO L87 Difference]: Start difference. First operand 183 states and 246 transitions. Second operand 14 states. [2020-10-14 23:57:52,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:52,830 INFO L93 Difference]: Finished difference Result 316 states and 457 transitions. [2020-10-14 23:57:52,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 23:57:52,831 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 25 [2020-10-14 23:57:52,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:52,833 INFO L225 Difference]: With dead ends: 316 [2020-10-14 23:57:52,833 INFO L226 Difference]: Without dead ends: 296 [2020-10-14 23:57:52,835 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:57:52,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2020-10-14 23:57:52,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 198. [2020-10-14 23:57:52,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-10-14 23:57:52,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 268 transitions. [2020-10-14 23:57:52,870 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 268 transitions. Word has length 25 [2020-10-14 23:57:52,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:52,871 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 268 transitions. [2020-10-14 23:57:52,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 23:57:52,871 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 268 transitions. [2020-10-14 23:57:52,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 23:57:52,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:52,873 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:52,873 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-14 23:57:52,873 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:52,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:52,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1657076444, now seen corresponding path program 11 times [2020-10-14 23:57:52,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:52,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2035825307] [2020-10-14 23:57:52,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:52,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:52,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:52,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:53,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:53,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:54,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:54,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 23:57:54,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:57:54,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1150 [2020-10-14 23:57:54,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:54,043 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:54,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 23:57:54,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:54,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 23:57:54,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:54,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:54,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:54,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:54,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:54,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:54,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:54,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:57:54,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:54,337 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:54,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:54,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:54,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:54,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:54,341 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-14 23:57:54,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2035825307] [2020-10-14 23:57:54,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:54,342 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 23:57:54,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426982868] [2020-10-14 23:57:54,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 23:57:54,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:54,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 23:57:54,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:57:54,343 INFO L87 Difference]: Start difference. First operand 198 states and 268 transitions. Second operand 13 states. [2020-10-14 23:57:55,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:55,102 INFO L93 Difference]: Finished difference Result 239 states and 313 transitions. [2020-10-14 23:57:55,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 23:57:55,103 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 26 [2020-10-14 23:57:55,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:55,104 INFO L225 Difference]: With dead ends: 239 [2020-10-14 23:57:55,104 INFO L226 Difference]: Without dead ends: 225 [2020-10-14 23:57:55,105 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2020-10-14 23:57:55,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-14 23:57:55,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 210. [2020-10-14 23:57:55,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-10-14 23:57:55,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 282 transitions. [2020-10-14 23:57:55,129 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 282 transitions. Word has length 26 [2020-10-14 23:57:55,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:55,130 INFO L479 AbstractCegarLoop]: Abstraction has 210 states and 282 transitions. [2020-10-14 23:57:55,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 23:57:55,130 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 282 transitions. [2020-10-14 23:57:55,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 23:57:55,131 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:55,131 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:55,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-14 23:57:55,132 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:55,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:55,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1572259612, now seen corresponding path program 12 times [2020-10-14 23:57:55,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:55,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1766297279] [2020-10-14 23:57:55,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:55,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:55,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:55,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:55,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:58,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:58,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 23:57:58,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:57:58,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3090 [2020-10-14 23:57:58,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:58,233 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:58,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 23:57:58,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 23:57:58,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 23:57:58,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:58,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:58,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:58,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:58,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:58,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:58,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:58,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:57:58,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:58,371 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:58,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:58,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:58,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:58,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:58,379 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-14 23:57:58,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1766297279] [2020-10-14 23:57:58,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:58,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 23:57:58,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131136461] [2020-10-14 23:57:58,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 23:57:58,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:58,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 23:57:58,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:57:58,381 INFO L87 Difference]: Start difference. First operand 210 states and 282 transitions. Second operand 9 states. [2020-10-14 23:57:58,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:58,579 INFO L93 Difference]: Finished difference Result 255 states and 346 transitions. [2020-10-14 23:57:58,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 23:57:58,579 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-10-14 23:57:58,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:58,581 INFO L225 Difference]: With dead ends: 255 [2020-10-14 23:57:58,581 INFO L226 Difference]: Without dead ends: 249 [2020-10-14 23:57:58,582 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:57:58,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-10-14 23:57:58,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 235. [2020-10-14 23:57:58,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2020-10-14 23:57:58,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 317 transitions. [2020-10-14 23:57:58,611 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 317 transitions. Word has length 26 [2020-10-14 23:57:58,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:58,612 INFO L479 AbstractCegarLoop]: Abstraction has 235 states and 317 transitions. [2020-10-14 23:57:58,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 23:57:58,612 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 317 transitions. [2020-10-14 23:57:58,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 23:57:58,613 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:58,613 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:58,613 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-14 23:57:58,613 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:58,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:58,614 INFO L82 PathProgramCache]: Analyzing trace with hash -68791060, now seen corresponding path program 13 times [2020-10-14 23:57:58,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:58,614 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [702008571] [2020-10-14 23:57:58,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:58,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:58,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:58,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:59,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:59,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 23:57:59,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:57:59,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 620 [2020-10-14 23:57:59,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:59,251 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:59,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 23:57:59,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:59,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 23:57:59,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:59,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:59,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:59,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:59,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:59,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:59,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:59,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:57:59,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:59,390 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:59,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:59,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:59,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:59,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:59,393 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-14 23:57:59,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [702008571] [2020-10-14 23:57:59,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:59,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 23:57:59,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897928846] [2020-10-14 23:57:59,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 23:57:59,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:59,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 23:57:59,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:57:59,395 INFO L87 Difference]: Start difference. First operand 235 states and 317 transitions. Second operand 10 states. [2020-10-14 23:57:59,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:59,690 INFO L93 Difference]: Finished difference Result 299 states and 385 transitions. [2020-10-14 23:57:59,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 23:57:59,694 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-14 23:57:59,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:59,696 INFO L225 Difference]: With dead ends: 299 [2020-10-14 23:57:59,696 INFO L226 Difference]: Without dead ends: 286 [2020-10-14 23:57:59,697 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:57:59,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-10-14 23:57:59,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 235. [2020-10-14 23:57:59,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2020-10-14 23:57:59,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 316 transitions. [2020-10-14 23:57:59,728 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 316 transitions. Word has length 26 [2020-10-14 23:57:59,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:59,728 INFO L479 AbstractCegarLoop]: Abstraction has 235 states and 316 transitions. [2020-10-14 23:57:59,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 23:57:59,728 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 316 transitions. [2020-10-14 23:57:59,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 23:57:59,729 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:59,729 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:59,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-14 23:57:59,729 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:59,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:59,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1261009116, now seen corresponding path program 14 times [2020-10-14 23:57:59,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:59,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1581495432] [2020-10-14 23:57:59,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:59,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:59,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:59,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:00,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:00,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 23:58:00,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:58:00,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 347 [2020-10-14 23:58:00,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:00,091 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:00,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 23:58:00,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:00,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 23:58:00,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:00,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:00,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:00,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:00,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:00,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:00,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:00,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:58:00,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:00,230 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:00,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:00,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:00,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:00,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:00,233 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-14 23:58:00,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1581495432] [2020-10-14 23:58:00,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:00,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 23:58:00,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57743559] [2020-10-14 23:58:00,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 23:58:00,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:00,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 23:58:00,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:58:00,238 INFO L87 Difference]: Start difference. First operand 235 states and 316 transitions. Second operand 10 states. [2020-10-14 23:58:00,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:00,488 INFO L93 Difference]: Finished difference Result 316 states and 402 transitions. [2020-10-14 23:58:00,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 23:58:00,489 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-14 23:58:00,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:00,491 INFO L225 Difference]: With dead ends: 316 [2020-10-14 23:58:00,491 INFO L226 Difference]: Without dead ends: 303 [2020-10-14 23:58:00,491 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:58:00,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2020-10-14 23:58:00,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 235. [2020-10-14 23:58:00,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2020-10-14 23:58:00,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 315 transitions. [2020-10-14 23:58:00,520 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 315 transitions. Word has length 26 [2020-10-14 23:58:00,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:00,520 INFO L479 AbstractCegarLoop]: Abstraction has 235 states and 315 transitions. [2020-10-14 23:58:00,521 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 23:58:00,521 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 315 transitions. [2020-10-14 23:58:00,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 23:58:00,521 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:00,522 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:00,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-14 23:58:00,522 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:00,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:00,522 INFO L82 PathProgramCache]: Analyzing trace with hash -381498918, now seen corresponding path program 14 times [2020-10-14 23:58:00,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:00,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1308210697] [2020-10-14 23:58:00,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:00,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:00,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:00,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:00,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:01,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:01,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 23:58:01,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:58:01,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 865 [2020-10-14 23:58:01,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:01,399 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:01,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 23:58:01,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:01,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 23:58:01,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:01,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:01,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:01,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:01,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:01,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:01,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:01,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:58:01,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:01,662 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:01,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:01,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:01,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:01,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:01,665 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:58:01,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1308210697] [2020-10-14 23:58:01,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:01,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 23:58:01,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917641587] [2020-10-14 23:58:01,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 23:58:01,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:01,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 23:58:01,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:58:01,668 INFO L87 Difference]: Start difference. First operand 235 states and 315 transitions. Second operand 15 states. [2020-10-14 23:58:02,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:02,294 INFO L93 Difference]: Finished difference Result 398 states and 574 transitions. [2020-10-14 23:58:02,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 23:58:02,295 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 26 [2020-10-14 23:58:02,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:02,297 INFO L225 Difference]: With dead ends: 398 [2020-10-14 23:58:02,297 INFO L226 Difference]: Without dead ends: 376 [2020-10-14 23:58:02,298 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:58:02,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2020-10-14 23:58:02,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 252. [2020-10-14 23:58:02,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-10-14 23:58:02,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 340 transitions. [2020-10-14 23:58:02,327 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 340 transitions. Word has length 26 [2020-10-14 23:58:02,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:02,327 INFO L479 AbstractCegarLoop]: Abstraction has 252 states and 340 transitions. [2020-10-14 23:58:02,327 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 23:58:02,328 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 340 transitions. [2020-10-14 23:58:02,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-14 23:58:02,328 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:02,328 INFO L422 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:02,329 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-14 23:58:02,329 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:02,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:02,329 INFO L82 PathProgramCache]: Analyzing trace with hash -82317768, now seen corresponding path program 15 times [2020-10-14 23:58:02,329 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:02,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [177604803] [2020-10-14 23:58:02,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:02,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:02,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:02,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:02,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:06,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:06,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-14 23:58:06,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:58:06,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3783 [2020-10-14 23:58:06,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:06,123 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:06,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 23:58:06,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 23:58:06,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 23:58:06,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:06,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:06,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:06,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:06,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:06,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:06,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:06,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:58:06,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:06,342 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:06,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:06,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:06,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:06,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:06,347 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-14 23:58:06,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [177604803] [2020-10-14 23:58:06,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:06,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 23:58:06,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090891848] [2020-10-14 23:58:06,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 23:58:06,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:06,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 23:58:06,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:58:06,350 INFO L87 Difference]: Start difference. First operand 252 states and 340 transitions. Second operand 10 states. [2020-10-14 23:58:06,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:06,540 INFO L93 Difference]: Finished difference Result 300 states and 409 transitions. [2020-10-14 23:58:06,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 23:58:06,541 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-14 23:58:06,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:06,542 INFO L225 Difference]: With dead ends: 300 [2020-10-14 23:58:06,542 INFO L226 Difference]: Without dead ends: 294 [2020-10-14 23:58:06,543 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:58:06,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-10-14 23:58:06,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 279. [2020-10-14 23:58:06,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2020-10-14 23:58:06,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 378 transitions. [2020-10-14 23:58:06,587 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 378 transitions. Word has length 27 [2020-10-14 23:58:06,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:06,588 INFO L479 AbstractCegarLoop]: Abstraction has 279 states and 378 transitions. [2020-10-14 23:58:06,588 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 23:58:06,588 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 378 transitions. [2020-10-14 23:58:06,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-14 23:58:06,597 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:06,597 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:06,597 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-14 23:58:06,597 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:06,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:06,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1332438603, now seen corresponding path program 15 times [2020-10-14 23:58:06,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:06,598 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1104115064] [2020-10-14 23:58:06,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:06,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:06,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:06,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:06,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:07,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:07,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-14 23:58:07,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:58:07,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1046 [2020-10-14 23:58:07,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:07,665 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:07,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 23:58:07,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:07,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 23:58:07,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:07,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:07,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:07,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:07,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:07,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:07,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:07,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:58:07,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:07,954 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:07,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:07,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:07,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:07,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:07,959 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:58:07,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1104115064] [2020-10-14 23:58:07,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:07,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 23:58:07,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329531557] [2020-10-14 23:58:07,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 23:58:07,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:07,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 23:58:07,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:58:07,967 INFO L87 Difference]: Start difference. First operand 279 states and 378 transitions. Second operand 16 states. [2020-10-14 23:58:08,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:08,608 INFO L93 Difference]: Finished difference Result 508 states and 746 transitions. [2020-10-14 23:58:08,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 23:58:08,610 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 27 [2020-10-14 23:58:08,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:08,612 INFO L225 Difference]: With dead ends: 508 [2020-10-14 23:58:08,613 INFO L226 Difference]: Without dead ends: 485 [2020-10-14 23:58:08,613 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:58:08,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2020-10-14 23:58:08,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 302. [2020-10-14 23:58:08,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 302 states. [2020-10-14 23:58:08,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 411 transitions. [2020-10-14 23:58:08,651 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 411 transitions. Word has length 27 [2020-10-14 23:58:08,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:08,651 INFO L479 AbstractCegarLoop]: Abstraction has 302 states and 411 transitions. [2020-10-14 23:58:08,651 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 23:58:08,651 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 411 transitions. [2020-10-14 23:58:08,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 23:58:08,653 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:08,653 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:08,653 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-14 23:58:08,653 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:08,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:08,654 INFO L82 PathProgramCache]: Analyzing trace with hash 113008762, now seen corresponding path program 16 times [2020-10-14 23:58:08,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:08,654 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [823073560] [2020-10-14 23:58:08,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:08,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:08,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:08,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:09,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:09,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 23:58:09,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:58:09,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 619 [2020-10-14 23:58:09,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:09,284 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:09,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 23:58:09,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:09,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 23:58:09,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:09,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:09,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:09,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:09,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:09,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:09,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:09,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:58:09,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:09,392 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:09,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:09,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:09,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:09,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:09,395 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-14 23:58:09,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [823073560] [2020-10-14 23:58:09,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:09,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 23:58:09,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655632385] [2020-10-14 23:58:09,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 23:58:09,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:09,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 23:58:09,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:58:09,397 INFO L87 Difference]: Start difference. First operand 302 states and 411 transitions. Second operand 10 states. [2020-10-14 23:58:09,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:09,577 INFO L93 Difference]: Finished difference Result 328 states and 437 transitions. [2020-10-14 23:58:09,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 23:58:09,578 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-14 23:58:09,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:09,583 INFO L225 Difference]: With dead ends: 328 [2020-10-14 23:58:09,583 INFO L226 Difference]: Without dead ends: 280 [2020-10-14 23:58:09,584 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:58:09,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-10-14 23:58:09,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 280. [2020-10-14 23:58:09,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-10-14 23:58:09,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 380 transitions. [2020-10-14 23:58:09,628 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 380 transitions. Word has length 28 [2020-10-14 23:58:09,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:09,629 INFO L479 AbstractCegarLoop]: Abstraction has 280 states and 380 transitions. [2020-10-14 23:58:09,629 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 23:58:09,629 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 380 transitions. [2020-10-14 23:58:09,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 23:58:09,630 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:09,631 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:09,631 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-14 23:58:09,631 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:09,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:09,632 INFO L82 PathProgramCache]: Analyzing trace with hash 2079985356, now seen corresponding path program 17 times [2020-10-14 23:58:09,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:09,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [969834822] [2020-10-14 23:58:09,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:09,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:09,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:09,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:10,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:10,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 23:58:10,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:58:10,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 679 [2020-10-14 23:58:10,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:10,323 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:10,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 23:58:10,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:58:10,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 23:58:10,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:10,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:10,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:10,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:10,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:10,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:10,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:10,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:58:10,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:10,439 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:10,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:10,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:10,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:10,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:10,441 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-14 23:58:10,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [969834822] [2020-10-14 23:58:10,441 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:10,441 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 23:58:10,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972356306] [2020-10-14 23:58:10,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 23:58:10,442 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:10,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 23:58:10,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:58:10,442 INFO L87 Difference]: Start difference. First operand 280 states and 380 transitions. Second operand 10 states. [2020-10-14 23:58:10,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:10,791 INFO L93 Difference]: Finished difference Result 385 states and 492 transitions. [2020-10-14 23:58:10,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 23:58:10,792 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-14 23:58:10,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:10,793 INFO L225 Difference]: With dead ends: 385 [2020-10-14 23:58:10,793 INFO L226 Difference]: Without dead ends: 252 [2020-10-14 23:58:10,794 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:58:10,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-10-14 23:58:10,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 227. [2020-10-14 23:58:10,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-10-14 23:58:10,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 295 transitions. [2020-10-14 23:58:10,824 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 295 transitions. Word has length 28 [2020-10-14 23:58:10,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:10,825 INFO L479 AbstractCegarLoop]: Abstraction has 227 states and 295 transitions. [2020-10-14 23:58:10,825 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 23:58:10,825 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 295 transitions. [2020-10-14 23:58:10,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 23:58:10,826 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:10,826 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:10,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-14 23:58:10,826 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:10,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:10,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1635256468, now seen corresponding path program 18 times [2020-10-14 23:58:10,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:10,827 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [974030758] [2020-10-14 23:58:10,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:10,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:10,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:10,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:11,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:11,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:11,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:11,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 23:58:11,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:58:11,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 800 [2020-10-14 23:58:11,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:11,644 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:11,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 23:58:11,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:11,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-14 23:58:11,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:11,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:11,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:11,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:12,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:12,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:12,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:12,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:58:12,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:12,001 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:12,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:12,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:12,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:12,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:12,005 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-14 23:58:12,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [974030758] [2020-10-14 23:58:12,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:12,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 23:58:12,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215625626] [2020-10-14 23:58:12,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 23:58:12,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:12,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 23:58:12,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:58:12,006 INFO L87 Difference]: Start difference. First operand 227 states and 295 transitions. Second operand 15 states. [2020-10-14 23:58:12,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:12,954 INFO L93 Difference]: Finished difference Result 287 states and 360 transitions. [2020-10-14 23:58:12,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 23:58:12,957 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 30 [2020-10-14 23:58:12,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:12,958 INFO L225 Difference]: With dead ends: 287 [2020-10-14 23:58:12,958 INFO L226 Difference]: Without dead ends: 271 [2020-10-14 23:58:12,959 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2020-10-14 23:58:12,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-10-14 23:58:12,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 242. [2020-10-14 23:58:12,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-10-14 23:58:12,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 313 transitions. [2020-10-14 23:58:12,989 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 313 transitions. Word has length 30 [2020-10-14 23:58:12,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:12,989 INFO L479 AbstractCegarLoop]: Abstraction has 242 states and 313 transitions. [2020-10-14 23:58:12,989 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 23:58:12,989 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 313 transitions. [2020-10-14 23:58:12,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 23:58:12,990 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:12,990 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:12,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-14 23:58:12,991 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:12,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:12,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1565827596, now seen corresponding path program 19 times [2020-10-14 23:58:12,991 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:12,991 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [647527000] [2020-10-14 23:58:12,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:13,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:13,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:13,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:13,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:17,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:17,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 23:58:17,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:58:17,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4467 [2020-10-14 23:58:17,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:17,474 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:17,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 23:58:17,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 23:58:17,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 23:58:17,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:17,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:17,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:17,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:17,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:17,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:17,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:17,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:58:17,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:17,650 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:17,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:17,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:17,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:17,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:17,652 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-14 23:58:17,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [647527000] [2020-10-14 23:58:17,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:17,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 23:58:17,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931729983] [2020-10-14 23:58:17,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 23:58:17,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:17,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 23:58:17,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:58:17,653 INFO L87 Difference]: Start difference. First operand 242 states and 313 transitions. Second operand 11 states. [2020-10-14 23:58:17,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:17,900 INFO L93 Difference]: Finished difference Result 294 states and 388 transitions. [2020-10-14 23:58:17,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 23:58:17,901 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-14 23:58:17,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:17,903 INFO L225 Difference]: With dead ends: 294 [2020-10-14 23:58:17,903 INFO L226 Difference]: Without dead ends: 288 [2020-10-14 23:58:17,903 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:58:17,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2020-10-14 23:58:17,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 270. [2020-10-14 23:58:17,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-10-14 23:58:17,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 352 transitions. [2020-10-14 23:58:17,937 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 352 transitions. Word has length 30 [2020-10-14 23:58:17,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:17,938 INFO L479 AbstractCegarLoop]: Abstraction has 270 states and 352 transitions. [2020-10-14 23:58:17,938 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 23:58:17,938 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 352 transitions. [2020-10-14 23:58:17,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 23:58:17,939 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:17,939 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:17,939 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-14 23:58:17,940 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:17,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:17,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1403821156, now seen corresponding path program 20 times [2020-10-14 23:58:17,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:17,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1256288903] [2020-10-14 23:58:17,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:17,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:17,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:18,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:18,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:18,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:19,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:19,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 23:58:19,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:58:19,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1582 [2020-10-14 23:58:19,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:19,532 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:19,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 23:58:19,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:19,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-14 23:58:19,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:20,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:20,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:20,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:20,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:20,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:20,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:20,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:58:20,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:20,260 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:20,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:20,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:20,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:20,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:20,264 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:58:20,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1256288903] [2020-10-14 23:58:20,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:20,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 23:58:20,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558986839] [2020-10-14 23:58:20,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 23:58:20,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:20,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 23:58:20,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2020-10-14 23:58:20,265 INFO L87 Difference]: Start difference. First operand 270 states and 352 transitions. Second operand 21 states. [2020-10-14 23:58:21,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:21,911 INFO L93 Difference]: Finished difference Result 397 states and 488 transitions. [2020-10-14 23:58:21,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 23:58:21,912 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 30 [2020-10-14 23:58:21,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:21,914 INFO L225 Difference]: With dead ends: 397 [2020-10-14 23:58:21,915 INFO L226 Difference]: Without dead ends: 388 [2020-10-14 23:58:21,916 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=125, Invalid=867, Unknown=0, NotChecked=0, Total=992 [2020-10-14 23:58:21,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2020-10-14 23:58:21,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 274. [2020-10-14 23:58:21,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-10-14 23:58:21,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 357 transitions. [2020-10-14 23:58:21,953 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 357 transitions. Word has length 30 [2020-10-14 23:58:21,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:21,954 INFO L479 AbstractCegarLoop]: Abstraction has 274 states and 357 transitions. [2020-10-14 23:58:21,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 23:58:21,954 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 357 transitions. [2020-10-14 23:58:21,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-14 23:58:21,955 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:21,955 INFO L422 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:21,955 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-14 23:58:21,955 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:21,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:21,956 INFO L82 PathProgramCache]: Analyzing trace with hash -395320954, now seen corresponding path program 21 times [2020-10-14 23:58:21,956 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:21,956 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1391748886] [2020-10-14 23:58:21,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:21,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:21,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:22,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:22,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:26,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:26,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-14 23:58:26,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:58:26,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 23:58:26,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:26,968 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:26,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 23:58:26,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 23:58:26,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 23:58:26,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:27,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:27,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:27,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:27,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:27,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:27,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:27,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:58:27,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:27,168 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:27,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:27,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:27,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:27,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:27,170 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-14 23:58:27,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1391748886] [2020-10-14 23:58:27,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:27,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 23:58:27,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543468510] [2020-10-14 23:58:27,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 23:58:27,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:27,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 23:58:27,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:58:27,172 INFO L87 Difference]: Start difference. First operand 274 states and 357 transitions. Second operand 12 states. [2020-10-14 23:58:27,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:27,498 INFO L93 Difference]: Finished difference Result 327 states and 434 transitions. [2020-10-14 23:58:27,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 23:58:27,498 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2020-10-14 23:58:27,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:27,500 INFO L225 Difference]: With dead ends: 327 [2020-10-14 23:58:27,500 INFO L226 Difference]: Without dead ends: 321 [2020-10-14 23:58:27,500 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:58:27,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2020-10-14 23:58:27,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 302. [2020-10-14 23:58:27,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 302 states. [2020-10-14 23:58:27,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 396 transitions. [2020-10-14 23:58:27,543 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 396 transitions. Word has length 31 [2020-10-14 23:58:27,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:27,543 INFO L479 AbstractCegarLoop]: Abstraction has 302 states and 396 transitions. [2020-10-14 23:58:27,543 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 23:58:27,543 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 396 transitions. [2020-10-14 23:58:27,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-14 23:58:27,544 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:27,545 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:27,545 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-14 23:58:27,545 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:27,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:27,545 INFO L82 PathProgramCache]: Analyzing trace with hash -734802441, now seen corresponding path program 22 times [2020-10-14 23:58:27,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:27,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1216799872] [2020-10-14 23:58:27,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:27,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:27,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:27,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:27,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:28,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:29,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:29,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-14 23:58:29,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:58:29,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1739 [2020-10-14 23:58:29,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:29,295 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:29,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 23:58:29,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:29,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 23:58:29,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:30,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:30,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:30,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:30,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:30,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:30,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:30,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:58:30,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:30,197 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:30,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:30,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:30,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:30,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:30,203 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 107 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:58:30,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1216799872] [2020-10-14 23:58:30,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:30,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 23:58:30,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303455354] [2020-10-14 23:58:30,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 23:58:30,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:30,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 23:58:30,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2020-10-14 23:58:30,205 INFO L87 Difference]: Start difference. First operand 302 states and 396 transitions. Second operand 22 states. [2020-10-14 23:58:31,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:31,888 INFO L93 Difference]: Finished difference Result 413 states and 526 transitions. [2020-10-14 23:58:31,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-14 23:58:31,888 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 31 [2020-10-14 23:58:31,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:31,890 INFO L225 Difference]: With dead ends: 413 [2020-10-14 23:58:31,890 INFO L226 Difference]: Without dead ends: 404 [2020-10-14 23:58:31,891 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=87, Invalid=969, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 23:58:31,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2020-10-14 23:58:31,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 303. [2020-10-14 23:58:31,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 303 states. [2020-10-14 23:58:31,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 398 transitions. [2020-10-14 23:58:31,933 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 398 transitions. Word has length 31 [2020-10-14 23:58:31,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:31,934 INFO L479 AbstractCegarLoop]: Abstraction has 303 states and 398 transitions. [2020-10-14 23:58:31,934 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 23:58:31,934 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 398 transitions. [2020-10-14 23:58:31,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 23:58:31,935 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:31,935 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:31,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-14 23:58:31,935 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:31,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:31,936 INFO L82 PathProgramCache]: Analyzing trace with hash 216131916, now seen corresponding path program 23 times [2020-10-14 23:58:31,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:31,936 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [351048076] [2020-10-14 23:58:31,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:31,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:31,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:32,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:32,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:32,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 23:58:32,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:58:32,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1041 [2020-10-14 23:58:32,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:32,988 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:32,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 23:58:32,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:58:32,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 23:58:32,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-14 23:58:33,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:33,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:33,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:33,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:33,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:33,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:33,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:58:33,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:33,214 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:33,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:33,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:33,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:33,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:33,219 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-14 23:58:33,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [351048076] [2020-10-14 23:58:33,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:33,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 23:58:33,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683257285] [2020-10-14 23:58:33,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 23:58:33,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:33,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 23:58:33,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:58:33,223 INFO L87 Difference]: Start difference. First operand 303 states and 398 transitions. Second operand 12 states. [2020-10-14 23:58:38,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:38,399 INFO L93 Difference]: Finished difference Result 623 states and 735 transitions. [2020-10-14 23:58:38,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-14 23:58:38,401 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-14 23:58:38,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:38,404 INFO L225 Difference]: With dead ends: 623 [2020-10-14 23:58:38,404 INFO L226 Difference]: Without dead ends: 560 [2020-10-14 23:58:38,405 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=192, Invalid=863, Unknown=1, NotChecked=0, Total=1056 [2020-10-14 23:58:38,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2020-10-14 23:58:38,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 289. [2020-10-14 23:58:38,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2020-10-14 23:58:38,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 373 transitions. [2020-10-14 23:58:38,447 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 373 transitions. Word has length 32 [2020-10-14 23:58:38,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:38,447 INFO L479 AbstractCegarLoop]: Abstraction has 289 states and 373 transitions. [2020-10-14 23:58:38,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 23:58:38,448 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 373 transitions. [2020-10-14 23:58:38,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 23:58:38,449 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:38,449 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:38,449 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-14 23:58:38,449 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:38,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:38,449 INFO L82 PathProgramCache]: Analyzing trace with hash -892288646, now seen corresponding path program 24 times [2020-10-14 23:58:38,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:38,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1713880376] [2020-10-14 23:58:38,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:38,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:38,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:38,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:39,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:39,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 23:58:39,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:58:39,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1090 [2020-10-14 23:58:39,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:39,548 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:39,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 23:58:39,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-14 23:58:39,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 23:58:39,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:39,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:39,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:39,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:39,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:39,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:39,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:39,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:58:39,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:39,706 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:39,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:39,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:39,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:39,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:39,708 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-14 23:58:39,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1713880376] [2020-10-14 23:58:39,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:39,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 23:58:39,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452478350] [2020-10-14 23:58:39,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 23:58:39,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:39,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 23:58:39,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:58:39,713 INFO L87 Difference]: Start difference. First operand 289 states and 373 transitions. Second operand 12 states. [2020-10-14 23:58:40,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:40,264 INFO L93 Difference]: Finished difference Result 374 states and 463 transitions. [2020-10-14 23:58:40,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 23:58:40,265 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-14 23:58:40,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:40,267 INFO L225 Difference]: With dead ends: 374 [2020-10-14 23:58:40,267 INFO L226 Difference]: Without dead ends: 315 [2020-10-14 23:58:40,268 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-10-14 23:58:40,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-10-14 23:58:40,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 276. [2020-10-14 23:58:40,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-10-14 23:58:40,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 351 transitions. [2020-10-14 23:58:40,317 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 351 transitions. Word has length 32 [2020-10-14 23:58:40,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:40,317 INFO L479 AbstractCegarLoop]: Abstraction has 276 states and 351 transitions. [2020-10-14 23:58:40,317 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 23:58:40,317 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 351 transitions. [2020-10-14 23:58:40,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 23:58:40,318 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:40,318 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:40,318 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-14 23:58:40,319 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:40,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:40,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1470058756, now seen corresponding path program 25 times [2020-10-14 23:58:40,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:40,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [134563857] [2020-10-14 23:58:40,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:40,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:40,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:40,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:40,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:41,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:41,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:41,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 23:58:41,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:58:41,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1159 [2020-10-14 23:58:41,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:41,489 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:41,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 23:58:41,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:41,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 23:58:41,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:42,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:42,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:42,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:42,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:42,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:42,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:42,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:58:42,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:42,322 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:42,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:42,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:42,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:42,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:42,326 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:58:42,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [134563857] [2020-10-14 23:58:42,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:42,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 23:58:42,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309905499] [2020-10-14 23:58:42,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 23:58:42,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:42,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 23:58:42,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=462, Unknown=0, NotChecked=0, Total=506 [2020-10-14 23:58:42,327 INFO L87 Difference]: Start difference. First operand 276 states and 351 transitions. Second operand 23 states. [2020-10-14 23:58:43,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:43,899 INFO L93 Difference]: Finished difference Result 378 states and 472 transitions. [2020-10-14 23:58:43,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-14 23:58:43,899 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 32 [2020-10-14 23:58:43,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:43,901 INFO L225 Difference]: With dead ends: 378 [2020-10-14 23:58:43,901 INFO L226 Difference]: Without dead ends: 369 [2020-10-14 23:58:43,902 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=89, Invalid=1033, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 23:58:43,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2020-10-14 23:58:43,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 277. [2020-10-14 23:58:43,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-10-14 23:58:43,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 353 transitions. [2020-10-14 23:58:43,951 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 353 transitions. Word has length 32 [2020-10-14 23:58:43,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:43,951 INFO L479 AbstractCegarLoop]: Abstraction has 277 states and 353 transitions. [2020-10-14 23:58:43,951 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 23:58:43,951 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 353 transitions. [2020-10-14 23:58:43,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-14 23:58:43,952 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:43,953 INFO L422 BasicCegarLoop]: trace histogram [13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:43,953 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-14 23:58:43,953 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:43,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:43,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1234087705, now seen corresponding path program 26 times [2020-10-14 23:58:43,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:43,954 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2131545436] [2020-10-14 23:58:43,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:43,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:43,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:44,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:44,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:44,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:46,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:46,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-14 23:58:46,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:58:46,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2182 [2020-10-14 23:58:46,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:46,150 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:46,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 23:58:46,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:46,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 23:58:46,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:46,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:46,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:46,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:46,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:46,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:46,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:46,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:58:46,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:46,310 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:46,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:46,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:46,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:46,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:46,319 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2020-10-14 23:58:46,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2131545436] [2020-10-14 23:58:46,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:46,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 23:58:46,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379233752] [2020-10-14 23:58:46,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 23:58:46,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:46,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 23:58:46,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:58:46,323 INFO L87 Difference]: Start difference. First operand 277 states and 353 transitions. Second operand 8 states. [2020-10-14 23:58:46,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:46,586 INFO L93 Difference]: Finished difference Result 411 states and 486 transitions. [2020-10-14 23:58:46,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 23:58:46,587 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-10-14 23:58:46,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:46,590 INFO L225 Difference]: With dead ends: 411 [2020-10-14 23:58:46,590 INFO L226 Difference]: Without dead ends: 398 [2020-10-14 23:58:46,592 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:58:46,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2020-10-14 23:58:46,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 266. [2020-10-14 23:58:46,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-14 23:58:46,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 337 transitions. [2020-10-14 23:58:46,667 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 337 transitions. Word has length 33 [2020-10-14 23:58:46,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:46,667 INFO L479 AbstractCegarLoop]: Abstraction has 266 states and 337 transitions. [2020-10-14 23:58:46,667 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 23:58:46,667 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 337 transitions. [2020-10-14 23:58:46,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-14 23:58:46,669 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:46,669 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:46,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-14 23:58:46,670 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:46,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:46,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1917292964, now seen corresponding path program 27 times [2020-10-14 23:58:46,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:46,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1281638993] [2020-10-14 23:58:46,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:46,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:46,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:46,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:47,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:48,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:48,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:48,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-14 23:58:48,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:58:48,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1784 [2020-10-14 23:58:48,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:48,488 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:48,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 23:58:48,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:48,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-14 23:58:48,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:49,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:49,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:49,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:49,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:49,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:49,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:49,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:58:49,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:49,063 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:49,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:49,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:49,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:49,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:49,072 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-14 23:58:49,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1281638993] [2020-10-14 23:58:49,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:49,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 23:58:49,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999267853] [2020-10-14 23:58:49,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 23:58:49,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:49,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 23:58:49,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-14 23:58:49,075 INFO L87 Difference]: Start difference. First operand 266 states and 337 transitions. Second operand 17 states. [2020-10-14 23:58:52,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:52,774 INFO L93 Difference]: Finished difference Result 349 states and 426 transitions. [2020-10-14 23:58:52,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-14 23:58:52,775 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 34 [2020-10-14 23:58:52,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:52,777 INFO L225 Difference]: With dead ends: 349 [2020-10-14 23:58:52,777 INFO L226 Difference]: Without dead ends: 331 [2020-10-14 23:58:52,779 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=125, Invalid=1134, Unknown=1, NotChecked=0, Total=1260 [2020-10-14 23:58:52,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2020-10-14 23:58:52,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 284. [2020-10-14 23:58:52,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-10-14 23:58:52,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 359 transitions. [2020-10-14 23:58:52,824 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 359 transitions. Word has length 34 [2020-10-14 23:58:52,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:52,825 INFO L479 AbstractCegarLoop]: Abstraction has 284 states and 359 transitions. [2020-10-14 23:58:52,825 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 23:58:52,825 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 359 transitions. [2020-10-14 23:58:52,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-14 23:58:52,826 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:52,826 INFO L422 BasicCegarLoop]: trace histogram [9, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:52,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-14 23:58:52,826 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:52,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:52,827 INFO L82 PathProgramCache]: Analyzing trace with hash -176298276, now seen corresponding path program 28 times [2020-10-14 23:58:52,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:52,827 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1440594542] [2020-10-14 23:58:52,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:52,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:52,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:52,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:53,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:57,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:57,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-14 23:58:57,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:58:57,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 23:58:57,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:57,838 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:57,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 23:58:57,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:58:57,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 23:58:57,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:58,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:58,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:58,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:58,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:58,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:58,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:58,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:58:58,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:58,089 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:58,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:58,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:58,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:58,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:58,093 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-14 23:58:58,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1440594542] [2020-10-14 23:58:58,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:58,093 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 23:58:58,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597941942] [2020-10-14 23:58:58,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 23:58:58,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:58,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 23:58:58,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:58:58,094 INFO L87 Difference]: Start difference. First operand 284 states and 359 transitions. Second operand 13 states. [2020-10-14 23:58:59,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:59,422 INFO L93 Difference]: Finished difference Result 341 states and 441 transitions. [2020-10-14 23:58:59,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 23:58:59,423 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-10-14 23:58:59,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:59,424 INFO L225 Difference]: With dead ends: 341 [2020-10-14 23:58:59,424 INFO L226 Difference]: Without dead ends: 335 [2020-10-14 23:58:59,425 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:58:59,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2020-10-14 23:58:59,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 313. [2020-10-14 23:58:59,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 313 states. [2020-10-14 23:58:59,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 398 transitions. [2020-10-14 23:58:59,478 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 398 transitions. Word has length 34 [2020-10-14 23:58:59,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:59,478 INFO L479 AbstractCegarLoop]: Abstraction has 313 states and 398 transitions. [2020-10-14 23:58:59,479 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 23:58:59,479 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 398 transitions. [2020-10-14 23:58:59,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-14 23:58:59,480 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:59,480 INFO L422 BasicCegarLoop]: trace histogram [10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:59,480 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-14 23:58:59,480 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:59,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:59,481 INFO L82 PathProgramCache]: Analyzing trace with hash -2088579528, now seen corresponding path program 29 times [2020-10-14 23:58:59,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:59,481 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1804748158] [2020-10-14 23:58:59,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:59,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:59,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:59,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:59,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:04,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:04,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-14 23:59:04,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:59:04,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 23:59:04,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:04,492 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:04,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 23:59:04,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:59:04,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 23:59:04,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:04,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:04,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:04,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:04,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:04,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:04,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:04,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:59:04,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:04,880 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:04,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:04,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:04,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:04,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:04,887 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-14 23:59:04,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1804748158] [2020-10-14 23:59:04,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:04,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 23:59:04,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844322011] [2020-10-14 23:59:04,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 23:59:04,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:04,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 23:59:04,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:59:04,890 INFO L87 Difference]: Start difference. First operand 313 states and 398 transitions. Second operand 14 states. [2020-10-14 23:59:05,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:05,484 INFO L93 Difference]: Finished difference Result 371 states and 482 transitions. [2020-10-14 23:59:05,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 23:59:05,485 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2020-10-14 23:59:05,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:05,489 INFO L225 Difference]: With dead ends: 371 [2020-10-14 23:59:05,489 INFO L226 Difference]: Without dead ends: 365 [2020-10-14 23:59:05,490 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:59:05,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2020-10-14 23:59:05,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 342. [2020-10-14 23:59:05,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 342 states. [2020-10-14 23:59:05,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 437 transitions. [2020-10-14 23:59:05,591 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 437 transitions. Word has length 35 [2020-10-14 23:59:05,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:05,592 INFO L479 AbstractCegarLoop]: Abstraction has 342 states and 437 transitions. [2020-10-14 23:59:05,592 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 23:59:05,593 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 437 transitions. [2020-10-14 23:59:05,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 23:59:05,600 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:05,600 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:05,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-14 23:59:05,600 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:05,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:05,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1577821370, now seen corresponding path program 30 times [2020-10-14 23:59:05,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:05,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1724883820] [2020-10-14 23:59:05,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:05,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:05,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:05,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:08,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:08,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-14 23:59:08,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:59:08,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2567 [2020-10-14 23:59:08,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:08,194 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:08,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 23:59:08,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-14 23:59:08,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 23:59:08,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:08,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:08,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:08,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:08,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:08,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:08,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:08,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:59:08,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:08,471 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:08,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:08,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:08,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:08,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 23:59:08,478 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-14 23:59:08,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1724883820] [2020-10-14 23:59:08,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:08,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 23:59:08,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804356400] [2020-10-14 23:59:08,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 23:59:08,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:08,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 23:59:08,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:59:08,480 INFO L87 Difference]: Start difference. First operand 342 states and 437 transitions. Second operand 14 states. [2020-10-14 23:59:08,811 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-10-14 23:59:11,061 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~y~0 (- 1)))) (and (<= 4 (+ c_main_~y~0 (* 4294967296 (div (+ .cse0 4294967298) 4294967296)))) (<= 3 (+ c_main_~y~0 (* 4294967296 (div (+ .cse0 4294967297) 4294967296)))) (<= 5 (+ c_main_~y~0 (* 4294967296 (div (+ .cse0 4294967299) 4294967296)))) (<= 6 (+ (* 4294967296 (div (+ .cse0 4294967300) 4294967296)) c_main_~y~0)))) is different from false [2020-10-14 23:59:11,860 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-10-14 23:59:13,458 WARN L193 SmtUtils]: Spent 1.07 s on a formula simplification that was a NOOP. DAG size: 44 [2020-10-14 23:59:15,854 WARN L193 SmtUtils]: Spent 2.09 s on a formula simplification that was a NOOP. DAG size: 37 [2020-10-14 23:59:16,298 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-10-14 23:59:19,961 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification that was a NOOP. DAG size: 41 [2020-10-14 23:59:20,281 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-10-14 23:59:20,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:20,783 INFO L93 Difference]: Finished difference Result 696 states and 800 transitions. [2020-10-14 23:59:20,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-14 23:59:20,784 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-10-14 23:59:20,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:20,786 INFO L225 Difference]: With dead ends: 696 [2020-10-14 23:59:20,786 INFO L226 Difference]: Without dead ends: 616 [2020-10-14 23:59:20,787 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=230, Invalid=963, Unknown=1, NotChecked=66, Total=1260 [2020-10-14 23:59:20,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2020-10-14 23:59:20,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 317. [2020-10-14 23:59:20,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2020-10-14 23:59:20,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 399 transitions. [2020-10-14 23:59:20,837 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 399 transitions. Word has length 36 [2020-10-14 23:59:20,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:20,838 INFO L479 AbstractCegarLoop]: Abstraction has 317 states and 399 transitions. [2020-10-14 23:59:20,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 23:59:20,838 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 399 transitions. [2020-10-14 23:59:20,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 23:59:20,839 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:20,839 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:20,839 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-14 23:59:20,839 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:20,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:20,840 INFO L82 PathProgramCache]: Analyzing trace with hash -329994740, now seen corresponding path program 31 times [2020-10-14 23:59:20,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:20,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [43584030] [2020-10-14 23:59:20,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:20,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:20,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:20,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:22,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:22,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-14 23:59:22,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:59:22,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1794 [2020-10-14 23:59:22,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:22,644 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:22,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 23:59:22,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-14 23:59:22,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 23:59:22,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:22,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:22,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:22,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:22,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:22,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:22,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:22,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:59:22,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:22,959 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:22,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:22,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:22,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:22,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:22,965 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-14 23:59:22,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [43584030] [2020-10-14 23:59:22,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:22,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 23:59:22,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048856458] [2020-10-14 23:59:22,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 23:59:22,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:22,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 23:59:22,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:59:22,968 INFO L87 Difference]: Start difference. First operand 317 states and 399 transitions. Second operand 14 states. [2020-10-14 23:59:24,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:24,055 INFO L93 Difference]: Finished difference Result 416 states and 504 transitions. [2020-10-14 23:59:24,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 23:59:24,056 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-10-14 23:59:24,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:24,058 INFO L225 Difference]: With dead ends: 416 [2020-10-14 23:59:24,058 INFO L226 Difference]: Without dead ends: 355 [2020-10-14 23:59:24,058 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2020-10-14 23:59:24,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2020-10-14 23:59:24,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 304. [2020-10-14 23:59:24,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-10-14 23:59:24,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 378 transitions. [2020-10-14 23:59:24,112 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 378 transitions. Word has length 36 [2020-10-14 23:59:24,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:24,113 INFO L479 AbstractCegarLoop]: Abstraction has 304 states and 378 transitions. [2020-10-14 23:59:24,113 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 23:59:24,113 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 378 transitions. [2020-10-14 23:59:24,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 23:59:24,114 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:24,114 INFO L422 BasicCegarLoop]: trace histogram [13, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:24,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-14 23:59:24,115 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:24,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:24,115 INFO L82 PathProgramCache]: Analyzing trace with hash 240481212, now seen corresponding path program 32 times [2020-10-14 23:59:24,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:24,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [97649187] [2020-10-14 23:59:24,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:24,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:24,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:24,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:25,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:26,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:28,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:28,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-14 23:59:28,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:59:28,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4312 [2020-10-14 23:59:28,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:28,439 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:28,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 23:59:28,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:28,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-14 23:59:28,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:29,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:29,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:29,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:29,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:29,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:29,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:29,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:59:29,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:29,910 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:29,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:29,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:29,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:29,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:29,920 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 103 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-14 23:59:29,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [97649187] [2020-10-14 23:59:29,921 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:29,921 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 23:59:29,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192370908] [2020-10-14 23:59:29,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 23:59:29,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:29,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 23:59:29,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=462, Unknown=0, NotChecked=0, Total=506 [2020-10-14 23:59:29,923 INFO L87 Difference]: Start difference. First operand 304 states and 378 transitions. Second operand 23 states. [2020-10-14 23:59:31,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:31,554 INFO L93 Difference]: Finished difference Result 410 states and 494 transitions. [2020-10-14 23:59:31,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-14 23:59:31,555 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 36 [2020-10-14 23:59:31,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:31,557 INFO L225 Difference]: With dead ends: 410 [2020-10-14 23:59:31,558 INFO L226 Difference]: Without dead ends: 397 [2020-10-14 23:59:31,558 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=77, Invalid=853, Unknown=0, NotChecked=0, Total=930 [2020-10-14 23:59:31,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2020-10-14 23:59:31,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 310. [2020-10-14 23:59:31,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 310 states. [2020-10-14 23:59:31,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 385 transitions. [2020-10-14 23:59:31,634 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 385 transitions. Word has length 36 [2020-10-14 23:59:31,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:31,635 INFO L479 AbstractCegarLoop]: Abstraction has 310 states and 385 transitions. [2020-10-14 23:59:31,635 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 23:59:31,635 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 385 transitions. [2020-10-14 23:59:31,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-14 23:59:31,637 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:31,637 INFO L422 BasicCegarLoop]: trace histogram [14, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:31,637 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-14 23:59:31,637 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:31,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:31,638 INFO L82 PathProgramCache]: Analyzing trace with hash -258642473, now seen corresponding path program 33 times [2020-10-14 23:59:31,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:31,638 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [930757827] [2020-10-14 23:59:31,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:31,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:31,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:31,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:33,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:34,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:36,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:36,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-14 23:59:36,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:59:36,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4770 [2020-10-14 23:59:36,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:36,428 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:36,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-14 23:59:36,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:36,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 23:59:36,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:38,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:38,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:38,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:38,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:38,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:38,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:38,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:59:38,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:38,101 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:38,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:38,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:38,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:38,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:38,109 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-14 23:59:38,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [930757827] [2020-10-14 23:59:38,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:38,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 23:59:38,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351324096] [2020-10-14 23:59:38,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 23:59:38,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:38,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 23:59:38,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=506, Unknown=0, NotChecked=0, Total=552 [2020-10-14 23:59:38,111 INFO L87 Difference]: Start difference. First operand 310 states and 385 transitions. Second operand 24 states. [2020-10-14 23:59:42,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:42,717 INFO L93 Difference]: Finished difference Result 434 states and 528 transitions. [2020-10-14 23:59:42,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-14 23:59:42,717 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 37 [2020-10-14 23:59:42,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:42,720 INFO L225 Difference]: With dead ends: 434 [2020-10-14 23:59:42,720 INFO L226 Difference]: Without dead ends: 421 [2020-10-14 23:59:42,720 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 23:59:42,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2020-10-14 23:59:42,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 311. [2020-10-14 23:59:42,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 311 states. [2020-10-14 23:59:42,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 387 transitions. [2020-10-14 23:59:42,761 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 387 transitions. Word has length 37 [2020-10-14 23:59:42,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:42,761 INFO L479 AbstractCegarLoop]: Abstraction has 311 states and 387 transitions. [2020-10-14 23:59:42,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 23:59:42,761 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 387 transitions. [2020-10-14 23:59:42,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-14 23:59:42,763 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:42,763 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:42,763 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-14 23:59:42,763 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:42,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:42,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1145513580, now seen corresponding path program 34 times [2020-10-14 23:59:42,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:42,764 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [22628046] [2020-10-14 23:59:42,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:42,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:42,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:42,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:43,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:43,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:43,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:43,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 23:59:43,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:59:43,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1014 [2020-10-14 23:59:43,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:43,798 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:43,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 23:59:43,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:43,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-14 23:59:43,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:44,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:44,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:44,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:44,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:44,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:44,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:44,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:59:44,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:44,580 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:44,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:44,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:44,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:44,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:44,585 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-10-14 23:59:44,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [22628046] [2020-10-14 23:59:44,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:44,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 23:59:44,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965491776] [2020-10-14 23:59:44,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 23:59:44,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:44,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 23:59:44,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-10-14 23:59:44,586 INFO L87 Difference]: Start difference. First operand 311 states and 387 transitions. Second operand 19 states. [2020-10-14 23:59:46,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:46,683 INFO L93 Difference]: Finished difference Result 421 states and 504 transitions. [2020-10-14 23:59:46,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-14 23:59:46,684 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 38 [2020-10-14 23:59:46,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:46,687 INFO L225 Difference]: With dead ends: 421 [2020-10-14 23:59:46,687 INFO L226 Difference]: Without dead ends: 401 [2020-10-14 23:59:46,687 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=144, Invalid=1496, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 23:59:46,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2020-10-14 23:59:46,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 332. [2020-10-14 23:59:46,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 332 states. [2020-10-14 23:59:46,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 413 transitions. [2020-10-14 23:59:46,730 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 413 transitions. Word has length 38 [2020-10-14 23:59:46,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:46,731 INFO L479 AbstractCegarLoop]: Abstraction has 332 states and 413 transitions. [2020-10-14 23:59:46,731 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 23:59:46,731 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 413 transitions. [2020-10-14 23:59:46,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-14 23:59:46,732 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:46,732 INFO L422 BasicCegarLoop]: trace histogram [11, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:46,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-14 23:59:46,732 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:46,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:46,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1792123572, now seen corresponding path program 35 times [2020-10-14 23:59:46,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:46,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [163165209] [2020-10-14 23:59:46,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:46,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:46,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:46,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:47,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:51,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:51,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 23:59:51,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:59:51,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 23:59:51,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:51,750 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:51,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 23:59:51,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-14 23:59:51,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 23:59:51,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:52,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:52,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:52,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:52,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:52,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:52,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:52,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:59:52,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:52,118 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:52,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:52,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:52,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:52,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:52,122 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-10-14 23:59:52,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [163165209] [2020-10-14 23:59:52,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:52,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 23:59:52,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014139035] [2020-10-14 23:59:52,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 23:59:52,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:52,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 23:59:52,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:59:52,123 INFO L87 Difference]: Start difference. First operand 332 states and 413 transitions. Second operand 15 states. [2020-10-14 23:59:52,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:52,893 INFO L93 Difference]: Finished difference Result 393 states and 501 transitions. [2020-10-14 23:59:52,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 23:59:52,894 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2020-10-14 23:59:52,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:52,896 INFO L225 Difference]: With dead ends: 393 [2020-10-14 23:59:52,896 INFO L226 Difference]: Without dead ends: 387 [2020-10-14 23:59:52,897 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:59:52,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2020-10-14 23:59:52,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 361. [2020-10-14 23:59:52,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 361 states. [2020-10-14 23:59:52,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 451 transitions. [2020-10-14 23:59:52,955 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 451 transitions. Word has length 38 [2020-10-14 23:59:52,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:52,955 INFO L479 AbstractCegarLoop]: Abstraction has 361 states and 451 transitions. [2020-10-14 23:59:52,955 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 23:59:52,955 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 451 transitions. [2020-10-14 23:59:52,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-14 23:59:52,956 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:52,957 INFO L422 BasicCegarLoop]: trace histogram [15, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:52,957 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-14 23:59:52,957 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:52,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:52,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1448392476, now seen corresponding path program 36 times [2020-10-14 23:59:52,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:52,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [373606654] [2020-10-14 23:59:52,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:52,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:52,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:53,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:54,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:55,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:57,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:57,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 23:59:57,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:59:57,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4209 [2020-10-14 23:59:57,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:57,179 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:57,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 23:59:57,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:57,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-14 23:59:57,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:57,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:57,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:57,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:57,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:57,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:57,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:57,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:59:57,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:57,360 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:57,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:57,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:57,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:57,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:57,364 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2020-10-14 23:59:57,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [373606654] [2020-10-14 23:59:57,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:57,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 23:59:57,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609106583] [2020-10-14 23:59:57,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 23:59:57,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:57,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 23:59:57,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:59:57,365 INFO L87 Difference]: Start difference. First operand 361 states and 451 transitions. Second operand 10 states. [2020-10-14 23:59:57,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:57,582 INFO L93 Difference]: Finished difference Result 550 states and 639 transitions. [2020-10-14 23:59:57,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 23:59:57,583 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2020-10-14 23:59:57,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:57,586 INFO L225 Difference]: With dead ends: 550 [2020-10-14 23:59:57,586 INFO L226 Difference]: Without dead ends: 537 [2020-10-14 23:59:57,586 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:59:57,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2020-10-14 23:59:57,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 350. [2020-10-14 23:59:57,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 350 states. [2020-10-14 23:59:57,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 437 transitions. [2020-10-14 23:59:57,641 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 437 transitions. Word has length 38 [2020-10-14 23:59:57,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:57,641 INFO L479 AbstractCegarLoop]: Abstraction has 350 states and 437 transitions. [2020-10-14 23:59:57,641 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 23:59:57,641 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 437 transitions. [2020-10-14 23:59:57,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-14 23:59:57,642 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:57,642 INFO L422 BasicCegarLoop]: trace histogram [12, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:57,642 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-14 23:59:57,643 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:57,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:57,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1849720454, now seen corresponding path program 37 times [2020-10-14 23:59:57,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:57,643 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [842791899] [2020-10-14 23:59:57,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:57,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:57,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:57,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:57,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:02,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:02,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-15 00:00:02,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:00:02,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-15 00:00:02,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:02,657 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:02,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-15 00:00:02,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-15 00:00:02,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-15 00:00:02,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:03,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:03,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:03,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:03,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:03,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:00:03,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:03,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:00:03,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:03,053 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:03,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:00:03,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:03,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:00:03,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:03,057 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-10-15 00:00:03,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [842791899] [2020-10-15 00:00:03,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:03,057 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-15 00:00:03,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139763848] [2020-10-15 00:00:03,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 00:00:03,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:03,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 00:00:03,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2020-10-15 00:00:03,058 INFO L87 Difference]: Start difference. First operand 350 states and 437 transitions. Second operand 16 states. [2020-10-15 00:00:05,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:05,628 INFO L93 Difference]: Finished difference Result 411 states and 519 transitions. [2020-10-15 00:00:05,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 00:00:05,629 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 39 [2020-10-15 00:00:05,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:05,631 INFO L225 Difference]: With dead ends: 411 [2020-10-15 00:00:05,631 INFO L226 Difference]: Without dead ends: 406 [2020-10-15 00:00:05,632 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2020-10-15 00:00:05,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2020-10-15 00:00:05,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 384. [2020-10-15 00:00:05,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 384 states. [2020-10-15 00:00:05,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 480 transitions. [2020-10-15 00:00:05,685 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 480 transitions. Word has length 39 [2020-10-15 00:00:05,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:05,686 INFO L479 AbstractCegarLoop]: Abstraction has 384 states and 480 transitions. [2020-10-15 00:00:05,686 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 00:00:05,686 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 480 transitions. [2020-10-15 00:00:05,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-15 00:00:05,687 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:05,687 INFO L422 BasicCegarLoop]: trace histogram [13, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:05,687 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-15 00:00:05,687 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:05,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:05,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1235291065, now seen corresponding path program 38 times [2020-10-15 00:00:05,688 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:05,688 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [155995796] [2020-10-15 00:00:05,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:05,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:05,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:05,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:07,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:08,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:10,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:10,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-15 00:00:10,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-15 00:00:10,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-15 00:00:10,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:10,704 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:10,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-15 00:00:10,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:00:10,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-15 00:00:10,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:10,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:10,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:10,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:10,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:10,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:00:10,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:10,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:00:10,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:10,890 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:10,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:00:10,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:10,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:00:10,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:10,893 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2020-10-15 00:00:10,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [155995796] [2020-10-15 00:00:10,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:10,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-15 00:00:10,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82941168] [2020-10-15 00:00:10,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 00:00:10,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:10,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 00:00:10,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-15 00:00:10,895 INFO L87 Difference]: Start difference. First operand 384 states and 480 transitions. Second operand 10 states. [2020-10-15 00:00:11,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:11,124 INFO L93 Difference]: Finished difference Result 649 states and 744 transitions. [2020-10-15 00:00:11,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 00:00:11,125 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-10-15 00:00:11,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:11,128 INFO L225 Difference]: With dead ends: 649 [2020-10-15 00:00:11,129 INFO L226 Difference]: Without dead ends: 634 [2020-10-15 00:00:11,129 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-15 00:00:11,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2020-10-15 00:00:11,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 379. [2020-10-15 00:00:11,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 379 states. [2020-10-15 00:00:11,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 474 transitions. [2020-10-15 00:00:11,188 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 474 transitions. Word has length 39 [2020-10-15 00:00:11,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:11,189 INFO L479 AbstractCegarLoop]: Abstraction has 379 states and 474 transitions. [2020-10-15 00:00:11,189 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 00:00:11,189 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 474 transitions. [2020-10-15 00:00:11,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-15 00:00:11,190 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:11,190 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:11,190 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-15 00:00:11,190 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:11,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:11,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1880231796, now seen corresponding path program 39 times [2020-10-15 00:00:11,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:11,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2088410749] [2020-10-15 00:00:11,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:11,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:11,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:11,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:14,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:14,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-15 00:00:14,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:00:14,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3091 [2020-10-15 00:00:14,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:14,292 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:14,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-15 00:00:14,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:00:14,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-15 00:00:14,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:14,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:14,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:14,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:14,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:14,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:00:14,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:14,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:00:14,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:14,557 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:14,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:00:14,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:14,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:00:14,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:14,559 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-15 00:00:14,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2088410749] [2020-10-15 00:00:14,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:14,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-15 00:00:14,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476089558] [2020-10-15 00:00:14,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 00:00:14,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:14,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 00:00:14,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-15 00:00:14,560 INFO L87 Difference]: Start difference. First operand 379 states and 474 transitions. Second operand 16 states. [2020-10-15 00:00:14,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:14,918 INFO L93 Difference]: Finished difference Result 446 states and 541 transitions. [2020-10-15 00:00:14,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 00:00:14,919 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2020-10-15 00:00:14,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:14,920 INFO L225 Difference]: With dead ends: 446 [2020-10-15 00:00:14,920 INFO L226 Difference]: Without dead ends: 342 [2020-10-15 00:00:14,921 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2020-10-15 00:00:14,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2020-10-15 00:00:14,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 342. [2020-10-15 00:00:14,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 342 states. [2020-10-15 00:00:14,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 422 transitions. [2020-10-15 00:00:14,973 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 422 transitions. Word has length 40 [2020-10-15 00:00:14,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:14,974 INFO L479 AbstractCegarLoop]: Abstraction has 342 states and 422 transitions. [2020-10-15 00:00:14,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 00:00:14,974 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 422 transitions. [2020-10-15 00:00:14,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-15 00:00:14,975 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:14,975 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:14,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-15 00:00:14,975 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:14,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:14,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1295082054, now seen corresponding path program 40 times [2020-10-15 00:00:14,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:14,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [502120899] [2020-10-15 00:00:14,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:14,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:14,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:15,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:18,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:18,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-15 00:00:18,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:00:18,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3499 [2020-10-15 00:00:18,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:18,486 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:18,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-15 00:00:18,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-15 00:00:18,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-15 00:00:18,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:18,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:18,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:18,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:18,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:18,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:00:18,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:18,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:00:18,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:18,816 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:18,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:00:18,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:18,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:00:18,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:18,820 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-15 00:00:18,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [502120899] [2020-10-15 00:00:18,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:18,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-15 00:00:18,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25421021] [2020-10-15 00:00:18,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 00:00:18,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:18,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 00:00:18,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-15 00:00:18,822 INFO L87 Difference]: Start difference. First operand 342 states and 422 transitions. Second operand 16 states. [2020-10-15 00:00:19,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:19,595 INFO L93 Difference]: Finished difference Result 446 states and 533 transitions. [2020-10-15 00:00:19,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 00:00:19,596 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2020-10-15 00:00:19,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:19,598 INFO L225 Difference]: With dead ends: 446 [2020-10-15 00:00:19,598 INFO L226 Difference]: Without dead ends: 385 [2020-10-15 00:00:19,598 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2020-10-15 00:00:19,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2020-10-15 00:00:19,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 329. [2020-10-15 00:00:19,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 329 states. [2020-10-15 00:00:19,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 402 transitions. [2020-10-15 00:00:19,633 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 402 transitions. Word has length 40 [2020-10-15 00:00:19,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:19,633 INFO L479 AbstractCegarLoop]: Abstraction has 329 states and 402 transitions. [2020-10-15 00:00:19,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 00:00:19,633 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 402 transitions. [2020-10-15 00:00:19,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-15 00:00:19,634 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:19,634 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:19,635 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-15 00:00:19,635 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:19,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:19,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1916681764, now seen corresponding path program 41 times [2020-10-15 00:00:19,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:19,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [347920886] [2020-10-15 00:00:19,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:19,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:19,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:20,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:20,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:20,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:21,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:21,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-15 00:00:21,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-15 00:00:21,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1566 [2020-10-15 00:00:21,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:21,235 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:21,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-15 00:00:21,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:00:21,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-15 00:00:21,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:22,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:22,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:22,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:22,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:22,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:00:22,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:22,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:00:22,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:22,305 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:22,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:00:22,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:22,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:00:22,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:22,312 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-10-15 00:00:22,313 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [347920886] [2020-10-15 00:00:22,313 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:22,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-15 00:00:22,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507555449] [2020-10-15 00:00:22,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 00:00:22,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:22,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 00:00:22,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=374, Unknown=0, NotChecked=0, Total=420 [2020-10-15 00:00:22,314 INFO L87 Difference]: Start difference. First operand 329 states and 402 transitions. Second operand 21 states. [2020-10-15 00:00:24,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:24,690 INFO L93 Difference]: Finished difference Result 468 states and 549 transitions. [2020-10-15 00:00:24,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-15 00:00:24,691 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 42 [2020-10-15 00:00:24,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:24,694 INFO L225 Difference]: With dead ends: 468 [2020-10-15 00:00:24,694 INFO L226 Difference]: Without dead ends: 446 [2020-10-15 00:00:24,694 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=135, Invalid=1347, Unknown=0, NotChecked=0, Total=1482 [2020-10-15 00:00:24,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2020-10-15 00:00:24,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 362. [2020-10-15 00:00:24,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 362 states. [2020-10-15 00:00:24,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 441 transitions. [2020-10-15 00:00:24,749 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 441 transitions. Word has length 42 [2020-10-15 00:00:24,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:24,750 INFO L479 AbstractCegarLoop]: Abstraction has 362 states and 441 transitions. [2020-10-15 00:00:24,750 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 00:00:24,750 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 441 transitions. [2020-10-15 00:00:24,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-15 00:00:24,751 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:24,751 INFO L422 BasicCegarLoop]: trace histogram [13, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:24,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-15 00:00:24,751 INFO L427 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:24,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:24,752 INFO L82 PathProgramCache]: Analyzing trace with hash -808663396, now seen corresponding path program 42 times [2020-10-15 00:00:24,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:24,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [663782261] [2020-10-15 00:00:24,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:24,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:24,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:24,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:25,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:29,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:29,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-15 00:00:29,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:00:29,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-15 00:00:29,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:29,771 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:29,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-15 00:00:29,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-15 00:00:29,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-15 00:00:29,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:30,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:30,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:30,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:30,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:30,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:00:30,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:30,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:00:30,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:30,241 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:30,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:00:30,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:30,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:00:30,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:30,246 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-10-15 00:00:30,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [663782261] [2020-10-15 00:00:30,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:30,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-15 00:00:30,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132574116] [2020-10-15 00:00:30,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 00:00:30,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:30,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 00:00:30,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-10-15 00:00:30,248 INFO L87 Difference]: Start difference. First operand 362 states and 441 transitions. Second operand 17 states. [2020-10-15 00:00:30,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:30,825 INFO L93 Difference]: Finished difference Result 433 states and 541 transitions. [2020-10-15 00:00:30,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 00:00:30,826 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 42 [2020-10-15 00:00:30,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:30,829 INFO L225 Difference]: With dead ends: 433 [2020-10-15 00:00:30,829 INFO L226 Difference]: Without dead ends: 427 [2020-10-15 00:00:30,830 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-10-15 00:00:30,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2020-10-15 00:00:30,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 376. [2020-10-15 00:00:30,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2020-10-15 00:00:30,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 463 transitions. [2020-10-15 00:00:30,869 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 463 transitions. Word has length 42 [2020-10-15 00:00:30,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:30,869 INFO L479 AbstractCegarLoop]: Abstraction has 376 states and 463 transitions. [2020-10-15 00:00:30,869 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 00:00:30,869 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 463 transitions. [2020-10-15 00:00:30,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-15 00:00:30,871 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:30,871 INFO L422 BasicCegarLoop]: trace histogram [13, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:30,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-15 00:00:30,871 INFO L427 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:30,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:30,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1419430876, now seen corresponding path program 43 times [2020-10-15 00:00:30,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:30,872 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [161083585] [2020-10-15 00:00:30,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:30,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:30,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:30,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:32,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:32,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:35,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:35,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-15 00:00:35,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-15 00:00:35,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-15 00:00:35,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:35,885 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:35,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-15 00:00:35,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:00:35,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-15 00:00:35,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:36,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:36,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:36,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:36,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:36,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:00:36,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:36,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:00:36,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:36,126 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:36,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:00:36,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:36,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:00:36,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:36,131 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2020-10-15 00:00:36,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [161083585] [2020-10-15 00:00:36,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:36,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-15 00:00:36,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523251360] [2020-10-15 00:00:36,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 00:00:36,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:36,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 00:00:36,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-15 00:00:36,132 INFO L87 Difference]: Start difference. First operand 376 states and 463 transitions. Second operand 11 states. [2020-10-15 00:00:36,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:36,411 INFO L93 Difference]: Finished difference Result 639 states and 725 transitions. [2020-10-15 00:00:36,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 00:00:36,414 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 42 [2020-10-15 00:00:36,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:36,417 INFO L225 Difference]: With dead ends: 639 [2020-10-15 00:00:36,417 INFO L226 Difference]: Without dead ends: 622 [2020-10-15 00:00:36,417 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-15 00:00:36,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2020-10-15 00:00:36,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 370. [2020-10-15 00:00:36,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 370 states. [2020-10-15 00:00:36,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 456 transitions. [2020-10-15 00:00:36,474 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 456 transitions. Word has length 42 [2020-10-15 00:00:36,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:36,474 INFO L479 AbstractCegarLoop]: Abstraction has 370 states and 456 transitions. [2020-10-15 00:00:36,474 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 00:00:36,474 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 456 transitions. [2020-10-15 00:00:36,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-15 00:00:36,475 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:36,475 INFO L422 BasicCegarLoop]: trace histogram [14, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:36,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-10-15 00:00:36,476 INFO L427 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:36,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:36,476 INFO L82 PathProgramCache]: Analyzing trace with hash 2130378296, now seen corresponding path program 44 times [2020-10-15 00:00:36,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:36,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [507926330] [2020-10-15 00:00:36,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:36,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:36,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:36,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:36,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:41,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:41,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-15 00:00:41,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:00:41,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-15 00:00:41,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:41,498 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:41,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-15 00:00:41,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-15 00:00:41,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-15 00:00:41,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:41,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:41,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:41,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:41,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:41,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:00:41,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:41,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:00:41,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:41,956 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:41,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:00:41,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:41,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:00:41,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:00:41,960 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-10-15 00:00:41,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [507926330] [2020-10-15 00:00:41,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:41,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-15 00:00:41,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606694842] [2020-10-15 00:00:41,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 00:00:41,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:41,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 00:00:41,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-15 00:00:41,962 INFO L87 Difference]: Start difference. First operand 370 states and 456 transitions. Second operand 18 states. [2020-10-15 00:00:46,610 WARN L193 SmtUtils]: Spent 2.91 s on a formula simplification that was a NOOP. DAG size: 51 [2020-10-15 00:00:52,167 WARN L193 SmtUtils]: Spent 433.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-10-15 00:00:55,872 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-10-15 00:00:56,169 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-10-15 00:00:59,436 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-10-15 00:01:01,993 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 47