/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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 language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label21.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 10:15:24,123 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 10:15:24,126 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 10:15:24,161 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 10:15:24,162 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 10:15:24,163 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 10:15:24,165 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 10:15:24,167 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 10:15:24,170 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 10:15:24,171 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 10:15:24,172 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 10:15:24,174 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 10:15:24,174 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 10:15:24,175 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 10:15:24,177 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 10:15:24,178 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 10:15:24,179 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 10:15:24,180 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 10:15:24,183 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 10:15:24,185 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 10:15:24,187 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 10:15:24,188 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 10:15:24,190 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 10:15:24,191 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 10:15:24,213 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 10:15:24,213 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 10:15:24,213 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 10:15:24,215 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 10:15:24,216 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 10:15:24,217 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 10:15:24,218 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 10:15:24,219 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 10:15:24,223 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 10:15:24,226 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 10:15:24,227 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 10:15:24,228 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 10:15:24,228 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 10:15:24,228 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 10:15:24,229 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 10:15:24,230 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 10:15:24,231 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 10:15:24,232 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 [2020-10-28 10:15:24,262 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 10:15:24,262 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 10:15:24,264 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 10:15:24,264 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 10:15:24,265 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 10:15:24,265 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 10:15:24,265 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 10:15:24,265 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 10:15:24,265 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 10:15:24,266 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 10:15:24,266 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 10:15:24,266 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 10:15:24,266 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 10:15:24,266 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 10:15:24,267 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 10:15:24,267 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 10:15:24,267 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 10:15:24,267 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 10:15:24,268 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 10:15:24,268 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 10:15:24,268 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 10:15:24,268 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 10:15:24,268 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 10:15:24,269 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 10:15:24,269 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 10:15:24,269 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 10:15:24,269 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 10:15:24,270 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 10:15:24,270 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 10:15:24,270 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 10:15:24,639 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 10:15:24,665 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 10:15:24,668 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 10:15:24,669 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 10:15:24,670 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 10:15:24,671 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label21.c [2020-10-28 10:15:24,746 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1dc2fc0f5/bf8bba44245e449bb849fb821ae1df4d/FLAG6f27ef7d3 [2020-10-28 10:15:25,639 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 10:15:25,640 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem03_label21.c [2020-10-28 10:15:25,662 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1dc2fc0f5/bf8bba44245e449bb849fb821ae1df4d/FLAG6f27ef7d3 [2020-10-28 10:15:25,778 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1dc2fc0f5/bf8bba44245e449bb849fb821ae1df4d [2020-10-28 10:15:25,781 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 10:15:25,788 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 10:15:25,791 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 10:15:25,791 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 10:15:25,795 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 10:15:25,796 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 10:15:25" (1/1) ... [2020-10-28 10:15:25,801 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79ce89df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:15:25, skipping insertion in model container [2020-10-28 10:15:25,801 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 10:15:25" (1/1) ... [2020-10-28 10:15:25,809 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 10:15:25,905 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 10:15:26,725 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 10:15:26,745 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 10:15:27,000 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 10:15:27,026 INFO L208 MainTranslator]: Completed translation [2020-10-28 10:15:27,027 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:15:27 WrapperNode [2020-10-28 10:15:27,027 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 10:15:27,028 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 10:15:27,028 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 10:15:27,029 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 10:15:27,044 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:15:27" (1/1) ... [2020-10-28 10:15:27,047 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:15:27" (1/1) ... [2020-10-28 10:15:27,111 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:15:27" (1/1) ... [2020-10-28 10:15:27,111 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:15:27" (1/1) ... [2020-10-28 10:15:27,205 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:15:27" (1/1) ... [2020-10-28 10:15:27,236 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:15:27" (1/1) ... [2020-10-28 10:15:27,249 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:15:27" (1/1) ... [2020-10-28 10:15:27,260 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 10:15:27,261 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 10:15:27,261 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 10:15:27,261 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 10:15:27,262 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:15:27" (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 [2020-10-28 10:15:27,347 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 10:15:27,347 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 10:15:27,348 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 10:15:27,348 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-28 10:15:27,348 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 10:15:27,348 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-28 10:15:27,348 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 10:15:27,349 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 10:15:27,349 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 10:15:27,349 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 10:15:27,349 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 10:15:27,349 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 10:15:27,349 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 10:15:27,350 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 10:15:27,350 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 10:15:27,350 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 10:15:27,350 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 10:15:27,350 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 10:15:27,351 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 10:15:29,661 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 10:15:29,661 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 10:15:29,664 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:15:29 BoogieIcfgContainer [2020-10-28 10:15:29,664 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 10:15:29,666 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 10:15:29,666 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 10:15:29,670 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 10:15:29,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 10:15:25" (1/3) ... [2020-10-28 10:15:29,671 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fa02482 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 10:15:29, skipping insertion in model container [2020-10-28 10:15:29,672 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:15:27" (2/3) ... [2020-10-28 10:15:29,672 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fa02482 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 10:15:29, skipping insertion in model container [2020-10-28 10:15:29,672 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:15:29" (3/3) ... [2020-10-28 10:15:29,674 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label21.c [2020-10-28 10:15:29,688 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 10:15:29,695 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 10:15:29,710 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 10:15:29,743 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 10:15:29,744 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 10:15:29,744 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 10:15:29,744 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 10:15:29,744 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 10:15:29,744 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 10:15:29,744 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 10:15:29,744 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 10:15:29,771 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states. [2020-10-28 10:15:29,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-10-28 10:15:29,792 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:15:29,794 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:15:29,794 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:15:29,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:15:29,802 INFO L82 PathProgramCache]: Analyzing trace with hash -955215892, now seen corresponding path program 1 times [2020-10-28 10:15:29,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:15:29,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1604917263] [2020-10-28 10:15:29,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:15:30,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:30,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:31,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:35,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:35,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 219 [2020-10-28 10:15:35,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:15:35,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-28 10:15:35,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:35,246 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:35,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:15:35,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:15:35,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 210 [2020-10-28 10:15:35,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 10:15:35,760 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:15:35,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:15:35,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:35,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:35,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:35,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:15:35,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:15:35,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-28 10:15:35,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:35,833 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:35,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:15:35,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:15:35,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:15:35,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:15:35,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 10:15:35,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1604917263] [2020-10-28 10:15:35,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 10:15:35,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 10:15:35,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646357233] [2020-10-28 10:15:35,960 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 10:15:35,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:15:35,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 10:15:35,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 10:15:35,985 INFO L87 Difference]: Start difference. First operand 315 states. Second operand 4 states. [2020-10-28 10:15:36,250 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:15:39,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:15:39,954 INFO L93 Difference]: Finished difference Result 863 states and 1524 transitions. [2020-10-28 10:15:39,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 10:15:39,956 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 209 [2020-10-28 10:15:39,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:15:39,977 INFO L225 Difference]: With dead ends: 863 [2020-10-28 10:15:39,978 INFO L226 Difference]: Without dead ends: 484 [2020-10-28 10:15:39,987 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 10:15:40,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2020-10-28 10:15:40,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 466. [2020-10-28 10:15:40,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 466 states. [2020-10-28 10:15:40,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 744 transitions. [2020-10-28 10:15:40,088 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 744 transitions. Word has length 209 [2020-10-28 10:15:40,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:15:40,089 INFO L481 AbstractCegarLoop]: Abstraction has 466 states and 744 transitions. [2020-10-28 10:15:40,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 10:15:40,090 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 744 transitions. [2020-10-28 10:15:40,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2020-10-28 10:15:40,101 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:15:40,101 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:15:40,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 10:15:40,102 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:15:40,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:15:40,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1656057307, now seen corresponding path program 1 times [2020-10-28 10:15:40,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:15:40,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [721977347] [2020-10-28 10:15:40,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:15:40,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:40,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:40,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:41,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:43,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:43,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:43,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 230 [2020-10-28 10:15:43,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 10:15:43,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3577 [2020-10-28 10:15:43,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:43,771 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:43,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:15:43,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 10:15:43,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 207 [2020-10-28 10:15:43,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:15:44,211 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:15:44,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:15:44,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:44,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:44,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:44,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:15:44,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:15:44,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 10:15:44,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:44,235 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:44,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:15:44,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:15:44,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:15:44,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:15:44,357 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-28 10:15:44,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:15:44,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:44,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:44,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:44,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 10:15:44,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:15:44,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-28 10:15:44,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:44,389 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:44,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:15:44,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:15:44,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 10:15:44,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:15:44,517 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 10:15:44,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [721977347] [2020-10-28 10:15:44,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:15:44,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 10:15:44,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355026492] [2020-10-28 10:15:44,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 10:15:44,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:15:44,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 10:15:44,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 10:15:44,522 INFO L87 Difference]: Start difference. First operand 466 states and 744 transitions. Second operand 5 states. [2020-10-28 10:15:44,918 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:15:48,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:15:48,474 INFO L93 Difference]: Finished difference Result 1357 states and 2199 transitions. [2020-10-28 10:15:48,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 10:15:48,475 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 218 [2020-10-28 10:15:48,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:15:48,485 INFO L225 Difference]: With dead ends: 1357 [2020-10-28 10:15:48,485 INFO L226 Difference]: Without dead ends: 897 [2020-10-28 10:15:48,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 10:15:48,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2020-10-28 10:15:48,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 888. [2020-10-28 10:15:48,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 888 states. [2020-10-28 10:15:48,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1358 transitions. [2020-10-28 10:15:48,596 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1358 transitions. Word has length 218 [2020-10-28 10:15:48,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:15:48,598 INFO L481 AbstractCegarLoop]: Abstraction has 888 states and 1358 transitions. [2020-10-28 10:15:48,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 10:15:48,598 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1358 transitions. [2020-10-28 10:15:48,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-10-28 10:15:48,605 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:15:48,606 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:15:48,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 10:15:48,607 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:15:48,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:15:48,609 INFO L82 PathProgramCache]: Analyzing trace with hash 775876767, now seen corresponding path program 1 times [2020-10-28 10:15:48,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:15:48,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [707315365] [2020-10-28 10:15:48,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:15:48,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:48,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:48,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:50,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:53,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:53,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 232 [2020-10-28 10:15:53,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 10:15:53,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4670 [2020-10-28 10:15:53,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:53,392 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:53,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:15:53,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 10:15:53,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 207 [2020-10-28 10:15:53,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:53,873 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:15:53,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:15:53,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:53,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:53,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:53,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:15:53,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:15:53,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 10:15:53,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:53,895 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:53,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:15:53,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:15:53,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:15:53,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:54,030 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-28 10:15:54,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:15:54,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:54,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:54,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:54,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-28 10:15:54,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:15:54,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 64 [2020-10-28 10:15:54,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:54,104 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:54,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:15:54,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:15:54,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 10:15:54,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:54,209 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 10:15:54,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [707315365] [2020-10-28 10:15:54,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:15:54,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 10:15:54,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665725082] [2020-10-28 10:15:54,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 10:15:54,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:15:54,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 10:15:54,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 10:15:54,215 INFO L87 Difference]: Start difference. First operand 888 states and 1358 transitions. Second operand 5 states. [2020-10-28 10:15:54,476 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:15:57,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:15:57,594 INFO L93 Difference]: Finished difference Result 2610 states and 4059 transitions. [2020-10-28 10:15:57,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 10:15:57,594 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 220 [2020-10-28 10:15:57,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:15:57,606 INFO L225 Difference]: With dead ends: 2610 [2020-10-28 10:15:57,607 INFO L226 Difference]: Without dead ends: 1728 [2020-10-28 10:15:57,610 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 10:15:57,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1728 states. [2020-10-28 10:15:57,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1728 to 1724. [2020-10-28 10:15:57,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1724 states. [2020-10-28 10:15:57,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1724 states to 1724 states and 2328 transitions. [2020-10-28 10:15:57,683 INFO L78 Accepts]: Start accepts. Automaton has 1724 states and 2328 transitions. Word has length 220 [2020-10-28 10:15:57,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:15:57,684 INFO L481 AbstractCegarLoop]: Abstraction has 1724 states and 2328 transitions. [2020-10-28 10:15:57,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 10:15:57,684 INFO L276 IsEmpty]: Start isEmpty. Operand 1724 states and 2328 transitions. [2020-10-28 10:15:57,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2020-10-28 10:15:57,693 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:15:57,693 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:15:57,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 10:15:57,693 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:15:57,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:15:57,694 INFO L82 PathProgramCache]: Analyzing trace with hash -760756406, now seen corresponding path program 1 times [2020-10-28 10:15:57,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:15:57,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [772603169] [2020-10-28 10:15:57,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:15:57,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:57,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:57,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:58,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:00,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:02,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:16:02,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 268 [2020-10-28 10:16:02,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 10:16:02,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 10:16:02,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:16:02,758 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:16:02,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:16:02,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 10:16:02,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 233 [2020-10-28 10:16:02,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:16:03,230 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:16:03,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:16:03,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:16:03,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:03,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:16:03,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:16:03,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:16:03,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 10:16:03,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:16:03,251 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:16:03,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:16:03,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:16:03,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:16:03,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:16:03,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:16:03,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:16:03,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:03,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:16:03,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 10:16:03,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:16:03,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-28 10:16:03,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:16:03,424 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:16:03,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:16:03,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:16:03,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 10:16:03,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:16:03,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-28 10:16:03,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:16:03,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:03,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:03,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:16:03,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 10:16:03,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:16:03,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 142 [2020-10-28 10:16:03,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:16:03,618 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:16:03,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:16:03,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:16:03,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 10:16:03,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:16:03,830 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-28 10:16:03,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [772603169] [2020-10-28 10:16:03,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:16:03,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 10:16:03,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934135563] [2020-10-28 10:16:03,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 10:16:03,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:16:03,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 10:16:03,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 10:16:03,834 INFO L87 Difference]: Start difference. First operand 1724 states and 2328 transitions. Second operand 5 states. [2020-10-28 10:16:04,249 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 10:16:07,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:16:07,395 INFO L93 Difference]: Finished difference Result 5131 states and 7046 transitions. [2020-10-28 10:16:07,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 10:16:07,396 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 254 [2020-10-28 10:16:07,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:16:07,421 INFO L225 Difference]: With dead ends: 5131 [2020-10-28 10:16:07,421 INFO L226 Difference]: Without dead ends: 3413 [2020-10-28 10:16:07,427 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 10:16:07,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3413 states. [2020-10-28 10:16:07,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3413 to 3408. [2020-10-28 10:16:07,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3408 states. [2020-10-28 10:16:07,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3408 states to 3408 states and 4442 transitions. [2020-10-28 10:16:07,580 INFO L78 Accepts]: Start accepts. Automaton has 3408 states and 4442 transitions. Word has length 254 [2020-10-28 10:16:07,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:16:07,581 INFO L481 AbstractCegarLoop]: Abstraction has 3408 states and 4442 transitions. [2020-10-28 10:16:07,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 10:16:07,581 INFO L276 IsEmpty]: Start isEmpty. Operand 3408 states and 4442 transitions. [2020-10-28 10:16:07,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2020-10-28 10:16:07,598 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:16:07,599 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:16:07,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 10:16:07,600 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:16:07,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:16:07,601 INFO L82 PathProgramCache]: Analyzing trace with hash 2029534899, now seen corresponding path program 1 times [2020-10-28 10:16:07,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:16:07,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1244112636] [2020-10-28 10:16:07,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:16:07,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:16:07,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:07,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:07,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:08,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:08,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:10,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:12,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:12,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:12,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:16:12,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 286 [2020-10-28 10:16:12,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 10:16:12,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5172 [2020-10-28 10:16:12,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:16:12,831 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:16:12,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:16:12,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-28 10:16:12,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 240 [2020-10-28 10:16:12,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:16:13,205 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:16:13,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:16:13,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:16:13,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:13,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:16:13,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:16:13,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:16:13,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 10:16:13,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:16:13,228 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:16:13,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:16:13,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:16:13,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:16:13,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:16:13,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:16:13,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:16:13,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:13,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:16:13,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 10:16:13,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:16:13,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-28 10:16:13,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:16:13,359 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:16:13,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:16:13,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:16:13,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:16:13,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:16:13,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-28 10:16:13,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:16:13,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:13,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:13,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:16:13,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-28 10:16:13,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:16:13,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-28 10:16:13,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:16:13,400 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:16:13,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:16:13,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:16:13,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 10:16:13,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:16:13,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-28 10:16:13,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:16:13,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:13,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:13,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:16:13,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 10:16:13,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:16:13,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 122 [2020-10-28 10:16:13,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:16:13,544 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:16:13,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:16:13,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:16:13,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 10:16:13,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:16:13,733 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 54 proven. 5 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-28 10:16:13,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1244112636] [2020-10-28 10:16:13,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:16:13,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 10:16:13,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825024666] [2020-10-28 10:16:13,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 10:16:13,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:16:13,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 10:16:13,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 10:16:13,736 INFO L87 Difference]: Start difference. First operand 3408 states and 4442 transitions. Second operand 5 states. [2020-10-28 10:16:14,273 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 10:16:17,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:16:17,452 INFO L93 Difference]: Finished difference Result 9537 states and 12576 transitions. [2020-10-28 10:16:17,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 10:16:17,455 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 270 [2020-10-28 10:16:17,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:16:17,477 INFO L225 Difference]: With dead ends: 9537 [2020-10-28 10:16:17,477 INFO L226 Difference]: Without dead ends: 3411 [2020-10-28 10:16:17,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 10:16:17,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3411 states. [2020-10-28 10:16:17,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3411 to 3407. [2020-10-28 10:16:17,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3407 states. [2020-10-28 10:16:17,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3407 states to 3407 states and 4440 transitions. [2020-10-28 10:16:17,619 INFO L78 Accepts]: Start accepts. Automaton has 3407 states and 4440 transitions. Word has length 270 [2020-10-28 10:16:17,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:16:17,620 INFO L481 AbstractCegarLoop]: Abstraction has 3407 states and 4440 transitions. [2020-10-28 10:16:17,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 10:16:17,620 INFO L276 IsEmpty]: Start isEmpty. Operand 3407 states and 4440 transitions. [2020-10-28 10:16:17,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2020-10-28 10:16:17,633 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:16:17,634 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:16:17,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 10:16:17,634 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:16:17,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:16:17,635 INFO L82 PathProgramCache]: Analyzing trace with hash 494138229, now seen corresponding path program 1 times [2020-10-28 10:16:17,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:16:17,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1399664711] [2020-10-28 10:16:17,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:16:17,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:16:17,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:17,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:18,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:18,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:21,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:22,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:16:22,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 286 [2020-10-28 10:16:22,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 10:16:22,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-28 10:16:22,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:16:22,713 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:16:22,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:16:22,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-28 10:16:22,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 207 [2020-10-28 10:16:22,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:16:23,069 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:16:23,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:16:23,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:16:23,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:23,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:16:23,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:16:23,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:16:23,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 10:16:23,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:16:23,086 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:16:23,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:16:23,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:16:23,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:16:23,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:16:23,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:16:23,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:16:23,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:23,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:16:23,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 10:16:23,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:16:23,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-28 10:16:23,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:16:23,224 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:16:23,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:16:23,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:16:23,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:16:23,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:16:23,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-28 10:16:23,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:16:23,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:23,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:16:23,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-28 10:16:23,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:16:23,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 10:16:23,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:16:23,244 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:16:23,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:16:23,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:16:23,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:16:23,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:16:23,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-28 10:16:23,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:16:23,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:23,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:16:23,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 10:16:23,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:16:23,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-10-28 10:16:23,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:16:23,323 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:16:23,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:16:23,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:16:23,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 10:16:23,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:16:23,458 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 53 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-10-28 10:16:23,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1399664711] [2020-10-28 10:16:23,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:16:23,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 10:16:23,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335910240] [2020-10-28 10:16:23,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 10:16:23,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:16:23,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 10:16:23,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 10:16:23,461 INFO L87 Difference]: Start difference. First operand 3407 states and 4440 transitions. Second operand 5 states. [2020-10-28 10:16:23,996 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:16:27,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:16:27,471 INFO L93 Difference]: Finished difference Result 8487 states and 11568 transitions. [2020-10-28 10:16:27,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 10:16:27,472 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 270 [2020-10-28 10:16:27,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:16:27,508 INFO L225 Difference]: With dead ends: 8487 [2020-10-28 10:16:27,508 INFO L226 Difference]: Without dead ends: 5086 [2020-10-28 10:16:27,521 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 10:16:27,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5086 states. [2020-10-28 10:16:27,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5086 to 5079. [2020-10-28 10:16:27,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5079 states. [2020-10-28 10:16:27,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5079 states to 5079 states and 6880 transitions. [2020-10-28 10:16:27,698 INFO L78 Accepts]: Start accepts. Automaton has 5079 states and 6880 transitions. Word has length 270 [2020-10-28 10:16:27,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:16:27,699 INFO L481 AbstractCegarLoop]: Abstraction has 5079 states and 6880 transitions. [2020-10-28 10:16:27,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 10:16:27,700 INFO L276 IsEmpty]: Start isEmpty. Operand 5079 states and 6880 transitions. [2020-10-28 10:16:27,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2020-10-28 10:16:27,720 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:16:27,720 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:16:27,721 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 10:16:27,721 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:16:27,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:16:27,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1369142417, now seen corresponding path program 1 times [2020-10-28 10:16:27,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:16:27,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1960683321] [2020-10-28 10:16:27,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:16:27,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:16:27,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:28,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:30,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:32,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:16:32,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 333 [2020-10-28 10:16:32,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 10:16:32,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4696 [2020-10-28 10:16:32,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:16:32,481 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:16:32,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:16:32,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-28 10:16:32,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-28 10:16:32,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:16:32,752 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:16:32,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:16:32,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:16:32,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:32,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:16:32,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:16:32,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:16:32,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 10:16:32,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:16:32,768 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:16:32,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:16:32,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:16:32,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:16:32,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:16:32,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:16:32,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:16:32,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:32,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:16:32,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 10:16:32,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:16:32,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-28 10:16:32,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:16:32,946 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:16:32,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:16:32,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:16:32,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 10:16:32,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:16:32,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-28 10:16:32,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:16:33,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:33,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:16:33,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 10:16:33,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:16:33,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 180 [2020-10-28 10:16:33,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:16:33,175 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:16:33,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:16:33,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:16:33,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-28 10:16:33,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:16:33,313 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 133 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 10:16:33,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1960683321] [2020-10-28 10:16:33,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:16:33,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:16:33,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708684053] [2020-10-28 10:16:33,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:16:33,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:16:33,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:16:33,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:16:33,316 INFO L87 Difference]: Start difference. First operand 5079 states and 6880 transitions. Second operand 7 states. [2020-10-28 10:16:33,795 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 10:16:34,197 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 10:16:40,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:16:40,163 INFO L93 Difference]: Finished difference Result 17579 states and 25770 transitions. [2020-10-28 10:16:40,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 10:16:40,163 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 319 [2020-10-28 10:16:40,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:16:40,253 INFO L225 Difference]: With dead ends: 17579 [2020-10-28 10:16:40,253 INFO L226 Difference]: Without dead ends: 12506 [2020-10-28 10:16:40,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 10:16:40,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12506 states. [2020-10-28 10:16:40,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12506 to 12323. [2020-10-28 10:16:40,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12323 states. [2020-10-28 10:16:40,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12323 states to 12323 states and 16326 transitions. [2020-10-28 10:16:40,861 INFO L78 Accepts]: Start accepts. Automaton has 12323 states and 16326 transitions. Word has length 319 [2020-10-28 10:16:40,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:16:40,862 INFO L481 AbstractCegarLoop]: Abstraction has 12323 states and 16326 transitions. [2020-10-28 10:16:40,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:16:40,862 INFO L276 IsEmpty]: Start isEmpty. Operand 12323 states and 16326 transitions. [2020-10-28 10:16:40,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2020-10-28 10:16:40,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:16:40,912 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:16:40,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 10:16:40,912 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:16:40,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:16:40,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1767468283, now seen corresponding path program 1 times [2020-10-28 10:16:40,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:16:40,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2039101056] [2020-10-28 10:16:40,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:16:40,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:16:41,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:41,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:41,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:45,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:16:45,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 357 [2020-10-28 10:16:45,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 10:16:45,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 10:16:45,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:16:45,996 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:16:45,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:16:45,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 10:16:45,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-28 10:16:45,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:16:46,311 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:16:46,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:16:46,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:16:46,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:46,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:16:46,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:16:46,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:16:46,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 10:16:46,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:16:46,324 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:16:46,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:16:46,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:16:46,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:16:46,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:16:46,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:16:46,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:16:46,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:46,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:16:46,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 10:16:46,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:16:46,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-28 10:16:46,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:16:46,482 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:16:46,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:16:46,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:16:46,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 10:16:46,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:16:46,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-28 10:16:46,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:16:46,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:46,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:16:46,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 10:16:46,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:16:46,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 197 [2020-10-28 10:16:46,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:16:46,716 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:16:46,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:16:46,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:16:46,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-28 10:16:46,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:16:46,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-10-28 10:16:46,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:16:47,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:47,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:16:47,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 10:16:47,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:16:47,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-28 10:16:47,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:16:47,039 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:16:47,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:16:47,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-28 10:16:47,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:16:47,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:16:47,590 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 143 proven. 33 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-28 10:16:47,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2039101056] [2020-10-28 10:16:47,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:16:47,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:16:47,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143198869] [2020-10-28 10:16:47,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:16:47,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:16:47,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:16:47,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:16:47,593 INFO L87 Difference]: Start difference. First operand 12323 states and 16326 transitions. Second operand 7 states. [2020-10-28 10:16:48,081 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 10:16:49,003 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-28 10:16:52,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:16:52,101 INFO L93 Difference]: Finished difference Result 29939 states and 43111 transitions. [2020-10-28 10:16:52,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 10:16:52,102 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 341 [2020-10-28 10:16:52,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:16:52,340 INFO L225 Difference]: With dead ends: 29939 [2020-10-28 10:16:52,340 INFO L226 Difference]: Without dead ends: 17626 [2020-10-28 10:16:52,372 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-28 10:16:52,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17626 states. [2020-10-28 10:16:52,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17626 to 17255. [2020-10-28 10:16:52,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17255 states. [2020-10-28 10:16:53,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17255 states to 17255 states and 22920 transitions. [2020-10-28 10:16:53,017 INFO L78 Accepts]: Start accepts. Automaton has 17255 states and 22920 transitions. Word has length 341 [2020-10-28 10:16:53,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:16:53,018 INFO L481 AbstractCegarLoop]: Abstraction has 17255 states and 22920 transitions. [2020-10-28 10:16:53,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:16:53,018 INFO L276 IsEmpty]: Start isEmpty. Operand 17255 states and 22920 transitions. [2020-10-28 10:16:53,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2020-10-28 10:16:53,081 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:16:53,082 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:16:53,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 10:16:53,082 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:16:53,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:16:53,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1077678966, now seen corresponding path program 1 times [2020-10-28 10:16:53,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:16:53,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1630356195] [2020-10-28 10:16:53,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:16:53,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:16:53,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:54,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:57,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:16:57,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 359 [2020-10-28 10:16:57,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:16:57,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4078 [2020-10-28 10:16:57,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:16:57,247 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:16:57,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:16:57,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:16:57,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-28 10:16:57,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:16:57,531 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:16:57,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:16:57,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:16:57,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:57,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:16:57,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:16:57,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:16:57,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 10:16:57,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:16:57,557 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:16:57,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:16:57,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:16:57,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:16:57,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:16:57,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:16:57,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:16:57,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:57,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:16:57,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 10:16:57,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:16:57,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 110 [2020-10-28 10:16:57,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:16:57,795 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:16:57,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:16:57,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:16:57,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-28 10:16:57,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:16:57,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-28 10:16:57,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:16:57,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:58,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:16:58,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 10:16:58,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:16:58,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-10-28 10:16:58,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:16:58,026 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:16:58,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:16:58,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 76 [2020-10-28 10:16:58,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:16:58,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:16:58,319 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 130 proven. 53 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-28 10:16:58,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1630356195] [2020-10-28 10:16:58,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:16:58,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:16:58,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124441778] [2020-10-28 10:16:58,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:16:58,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:16:58,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:16:58,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:16:58,321 INFO L87 Difference]: Start difference. First operand 17255 states and 22920 transitions. Second operand 7 states. [2020-10-28 10:16:58,604 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-28 10:17:02,645 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 10:17:03,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:17:03,210 INFO L93 Difference]: Finished difference Result 40705 states and 55444 transitions. [2020-10-28 10:17:03,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 10:17:03,211 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 345 [2020-10-28 10:17:03,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:17:03,329 INFO L225 Difference]: With dead ends: 40705 [2020-10-28 10:17:03,329 INFO L226 Difference]: Without dead ends: 27681 [2020-10-28 10:17:03,371 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-28 10:17:03,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27681 states. [2020-10-28 10:17:04,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27681 to 27626. [2020-10-28 10:17:04,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27626 states. [2020-10-28 10:17:04,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27626 states to 27626 states and 37112 transitions. [2020-10-28 10:17:04,435 INFO L78 Accepts]: Start accepts. Automaton has 27626 states and 37112 transitions. Word has length 345 [2020-10-28 10:17:04,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:17:04,435 INFO L481 AbstractCegarLoop]: Abstraction has 27626 states and 37112 transitions. [2020-10-28 10:17:04,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:17:04,436 INFO L276 IsEmpty]: Start isEmpty. Operand 27626 states and 37112 transitions. [2020-10-28 10:17:04,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2020-10-28 10:17:04,523 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:17:04,523 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:17:04,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 10:17:04,524 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:17:04,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:17:04,525 INFO L82 PathProgramCache]: Analyzing trace with hash 39985199, now seen corresponding path program 1 times [2020-10-28 10:17:04,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:17:04,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [502137248] [2020-10-28 10:17:04,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:17:04,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:17:04,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:17:04,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:17:04,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:17:05,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:17:05,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:17:09,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:17:09,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 369 [2020-10-28 10:17:09,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 10:17:09,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 10:17:09,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:17:09,599 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:17:09,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:17:09,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-28 10:17:09,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-28 10:17:09,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:17:09,919 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:17:09,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:17:09,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:17:09,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:17:09,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:17:09,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:17:09,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:17:09,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 10:17:09,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:17:09,938 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:17:09,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:17:09,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:17:09,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:17:09,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:17:10,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:17:10,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:17:10,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:17:10,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:17:10,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 10:17:10,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:17:10,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 10:17:10,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:17:10,060 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:17:10,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:17:10,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:17:10,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:17:10,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:17:10,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-28 10:17:10,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:17:10,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:17:10,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:17:10,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-28 10:17:10,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:17:10,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 10:17:10,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:17:10,090 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:17:10,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:17:10,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:17:10,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 10:17:10,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:17:10,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-28 10:17:10,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:17:10,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:17:10,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:17:10,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 10:17:10,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:17:10,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 247 [2020-10-28 10:17:10,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:17:10,376 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:17:10,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:17:10,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:17:10,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-28 10:17:10,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:17:10,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2020-10-28 10:17:10,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:17:10,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:17:10,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:17:10,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 10:17:10,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:17:10,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-28 10:17:10,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:17:10,517 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:17:10,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:17:10,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-28 10:17:10,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:17:10,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:17:10,780 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 162 proven. 33 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-10-28 10:17:10,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [502137248] [2020-10-28 10:17:10,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:17:10,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:17:10,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777630125] [2020-10-28 10:17:10,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:17:10,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:17:10,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:17:10,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:17:10,783 INFO L87 Difference]: Start difference. First operand 27626 states and 37112 transitions. Second operand 7 states. [2020-10-28 10:17:11,205 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 10:17:11,664 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 10:17:17,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:17:17,206 INFO L93 Difference]: Finished difference Result 53609 states and 76506 transitions. [2020-10-28 10:17:17,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 10:17:17,206 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 351 [2020-10-28 10:17:17,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:17:17,422 INFO L225 Difference]: With dead ends: 53609 [2020-10-28 10:17:17,422 INFO L226 Difference]: Without dead ends: 30847 [2020-10-28 10:17:17,456 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 10:17:17,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30847 states. [2020-10-28 10:17:18,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30847 to 30369. [2020-10-28 10:17:18,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30369 states. [2020-10-28 10:17:18,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30369 states to 30369 states and 40800 transitions. [2020-10-28 10:17:18,395 INFO L78 Accepts]: Start accepts. Automaton has 30369 states and 40800 transitions. Word has length 351 [2020-10-28 10:17:18,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:17:18,395 INFO L481 AbstractCegarLoop]: Abstraction has 30369 states and 40800 transitions. [2020-10-28 10:17:18,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:17:18,395 INFO L276 IsEmpty]: Start isEmpty. Operand 30369 states and 40800 transitions. [2020-10-28 10:17:18,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2020-10-28 10:17:18,464 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:17:18,464 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:17:18,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 10:17:18,465 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:17:18,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:17:18,466 INFO L82 PathProgramCache]: Analyzing trace with hash 151467484, now seen corresponding path program 1 times [2020-10-28 10:17:18,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:17:18,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [449606006] [2020-10-28 10:17:18,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:17:18,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:17:18,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:17:18,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:17:18,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:17:19,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:17:21,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:17:23,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:17:23,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 368 [2020-10-28 10:17:23,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 10:17:23,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5090 [2020-10-28 10:17:23,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:17:23,619 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:17:23,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:17:23,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-28 10:17:23,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-28 10:17:23,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:17:23,940 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:17:23,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:17:23,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:17:23,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:17:23,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:17:23,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:17:23,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:17:23,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 10:17:23,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:17:23,952 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:17:23,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:17:23,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:17:23,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:17:23,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:17:24,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:17:24,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:17:24,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:17:24,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:17:24,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 10:17:24,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:17:24,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-10-28 10:17:24,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:17:24,133 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:17:24,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:17:24,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:17:24,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 10:17:24,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:17:24,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-28 10:17:24,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:17:24,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:17:24,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:17:24,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 10:17:24,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:17:24,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 192 [2020-10-28 10:17:24,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:17:24,383 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:17:24,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:17:24,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:17:24,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-28 10:17:24,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:17:24,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-10-28 10:17:24,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:17:24,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:17:24,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:17:24,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 10:17:24,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:17:24,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-28 10:17:24,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:17:24,556 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:17:24,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:17:24,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-28 10:17:24,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:17:24,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:17:24,801 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 165 proven. 33 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-28 10:17:24,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [449606006] [2020-10-28 10:17:24,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:17:24,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:17:24,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11778824] [2020-10-28 10:17:24,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:17:24,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:17:24,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:17:24,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:17:24,804 INFO L87 Difference]: Start difference. First operand 30369 states and 40800 transitions. Second operand 7 states. [2020-10-28 10:17:25,315 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 10:17:27,965 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-28 10:17:30,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:17:30,988 INFO L93 Difference]: Finished difference Result 78690 states and 119501 transitions. [2020-10-28 10:17:30,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 10:17:30,989 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 352 [2020-10-28 10:17:30,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:17:31,353 INFO L225 Difference]: With dead ends: 78690 [2020-10-28 10:17:31,353 INFO L226 Difference]: Without dead ends: 48335 [2020-10-28 10:17:31,433 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-28 10:17:31,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48335 states. [2020-10-28 10:17:33,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48335 to 46802. [2020-10-28 10:17:33,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46802 states. [2020-10-28 10:17:33,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46802 states to 46802 states and 62940 transitions. [2020-10-28 10:17:33,406 INFO L78 Accepts]: Start accepts. Automaton has 46802 states and 62940 transitions. Word has length 352 [2020-10-28 10:17:33,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:17:33,406 INFO L481 AbstractCegarLoop]: Abstraction has 46802 states and 62940 transitions. [2020-10-28 10:17:33,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:17:33,406 INFO L276 IsEmpty]: Start isEmpty. Operand 46802 states and 62940 transitions. [2020-10-28 10:17:33,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2020-10-28 10:17:33,504 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:17:33,504 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:17:33,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 10:17:33,504 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:17:33,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:17:33,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1308049271, now seen corresponding path program 1 times [2020-10-28 10:17:33,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:17:33,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1438956165] [2020-10-28 10:17:33,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:17:33,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:17:33,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:17:33,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:17:33,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:17:33,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:17:38,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:17:38,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 373 [2020-10-28 10:17:38,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 10:17:38,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5084 [2020-10-28 10:17:38,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:17:38,646 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:17:38,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:17:38,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 82 [2020-10-28 10:17:38,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-28 10:17:38,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:17:38,999 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:17:39,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:17:39,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:17:39,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:17:39,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:17:39,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:17:39,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:17:39,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 10:17:39,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:17:39,017 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:17:39,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:17:39,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:17:39,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:17:39,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:17:39,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:17:39,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:17:39,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:17:39,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:17:39,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 10:17:39,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:17:39,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 10:17:39,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:17:39,155 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:17:39,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:17:39,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:17:39,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:17:39,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:17:39,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-28 10:17:39,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:17:39,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:17:39,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:17:39,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-28 10:17:39,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:17:39,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 10:17:39,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:17:39,182 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:17:39,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:17:39,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:17:39,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:17:39,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:17:39,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-28 10:17:39,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:17:39,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:17:39,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:17:39,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 10:17:39,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:17:39,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-10-28 10:17:39,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:17:39,286 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:17:39,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:17:39,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:17:39,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 10:17:39,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:17:39,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-10-28 10:17:39,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:17:39,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:17:39,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:17:39,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 10:17:39,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:17:39,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 192 [2020-10-28 10:17:39,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:17:39,543 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:17:39,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:17:39,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:17:39,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-28 10:17:39,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:17:39,876 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 199 proven. 2 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-10-28 10:17:39,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1438956165] [2020-10-28 10:17:39,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:17:39,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:17:39,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273180487] [2020-10-28 10:17:39,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:17:39,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:17:39,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:17:39,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:17:39,879 INFO L87 Difference]: Start difference. First operand 46802 states and 62940 transitions. Second operand 7 states. [2020-10-28 10:17:40,322 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 10:17:42,295 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 10:17:46,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:17:46,074 INFO L93 Difference]: Finished difference Result 95820 states and 137492 transitions. [2020-10-28 10:17:46,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 10:17:46,075 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 355 [2020-10-28 10:17:46,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:17:46,358 INFO L225 Difference]: With dead ends: 95820 [2020-10-28 10:17:46,359 INFO L226 Difference]: Without dead ends: 50284 [2020-10-28 10:17:46,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 10:17:46,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50284 states. [2020-10-28 10:17:47,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50284 to 48135. [2020-10-28 10:17:47,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48135 states. [2020-10-28 10:17:47,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48135 states to 48135 states and 63339 transitions. [2020-10-28 10:17:47,986 INFO L78 Accepts]: Start accepts. Automaton has 48135 states and 63339 transitions. Word has length 355 [2020-10-28 10:17:47,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:17:47,987 INFO L481 AbstractCegarLoop]: Abstraction has 48135 states and 63339 transitions. [2020-10-28 10:17:47,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:17:47,987 INFO L276 IsEmpty]: Start isEmpty. Operand 48135 states and 63339 transitions. [2020-10-28 10:17:48,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2020-10-28 10:17:48,056 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:17:48,056 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:17:48,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 10:17:48,057 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:17:48,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:17:48,057 INFO L82 PathProgramCache]: Analyzing trace with hash -8505719, now seen corresponding path program 1 times [2020-10-28 10:17:48,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:17:48,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1726396177] [2020-10-28 10:17:48,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:17:48,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:17:48,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:17:48,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:17:48,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:17:53,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:17:53,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:17:53,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 378 [2020-10-28 10:17:53,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 10:17:53,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5085 [2020-10-28 10:17:53,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:17:53,193 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:17:53,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:17:53,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-28 10:17:53,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 141 [2020-10-28 10:17:53,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:17:53,534 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:17:53,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:17:53,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:17:53,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:17:53,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:17:53,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:17:53,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:17:53,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 10:17:53,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:17:53,546 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:17:53,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:17:53,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:17:53,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:17:53,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:17:53,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:17:53,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:17:53,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:17:53,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:17:53,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-28 10:17:53,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:17:53,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-28 10:17:53,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:17:53,683 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:17:53,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:17:53,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:17:53,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 10:17:53,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:17:53,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-28 10:17:53,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:17:53,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:17:53,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:17:53,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 10:17:53,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:17:53,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 183 [2020-10-28 10:17:53,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:17:53,904 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:17:53,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:17:53,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:17:53,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-28 10:17:53,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:17:53,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-28 10:17:54,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:17:54,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:17:54,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:17:54,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 10:17:54,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:17:54,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 437 [2020-10-28 10:17:54,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:17:54,480 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:17:54,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:17:54,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:17:54,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-28 10:17:54,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:17:54,869 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 172 proven. 6 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2020-10-28 10:17:54,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1726396177] [2020-10-28 10:17:54,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:17:54,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:17:54,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499609603] [2020-10-28 10:17:54,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:17:54,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:17:54,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:17:54,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:17:54,871 INFO L87 Difference]: Start difference. First operand 48135 states and 63339 transitions. Second operand 7 states. [2020-10-28 10:17:55,347 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-28 10:17:56,995 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 10:18:03,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:18:03,195 INFO L93 Difference]: Finished difference Result 120279 states and 176327 transitions. [2020-10-28 10:18:03,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 10:18:03,195 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 362 [2020-10-28 10:18:03,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:18:03,797 INFO L225 Difference]: With dead ends: 120279 [2020-10-28 10:18:03,797 INFO L226 Difference]: Without dead ends: 76034 [2020-10-28 10:18:03,876 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 10:18:03,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76034 states. [2020-10-28 10:18:06,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76034 to 74412. [2020-10-28 10:18:06,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74412 states. [2020-10-28 10:18:07,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74412 states to 74412 states and 99873 transitions. [2020-10-28 10:18:07,233 INFO L78 Accepts]: Start accepts. Automaton has 74412 states and 99873 transitions. Word has length 362 [2020-10-28 10:18:07,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:18:07,248 INFO L481 AbstractCegarLoop]: Abstraction has 74412 states and 99873 transitions. [2020-10-28 10:18:07,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:18:07,249 INFO L276 IsEmpty]: Start isEmpty. Operand 74412 states and 99873 transitions. [2020-10-28 10:18:07,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2020-10-28 10:18:07,434 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:18:07,434 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:18:07,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 10:18:07,435 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:18:07,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:18:07,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1934280626, now seen corresponding path program 1 times [2020-10-28 10:18:07,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:18:07,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1410658937] [2020-10-28 10:18:07,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:18:07,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:18:07,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:18:07,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:18:07,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:18:09,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:18:12,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:18:12,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 379 [2020-10-28 10:18:12,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 10:18:12,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 10:18:12,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:18:12,512 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:18:12,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 10:18:12,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:18:12,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 127 [2020-10-28 10:18:12,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:18:12,829 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:18:12,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:18:12,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:18:12,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:18:12,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:18:12,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:18:12,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:18:12,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 10:18:12,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:18:12,858 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:18:12,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:18:12,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:18:12,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:18:12,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:18:12,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:18:12,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:18:13,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:18:13,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:18:13,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:18:13,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-28 10:18:13,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:18:13,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 317 [2020-10-28 10:18:13,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:18:13,308 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:18:13,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:18:13,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:18:13,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 10:18:13,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:18:13,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-28 10:18:13,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:18:13,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:18:13,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:18:13,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 10:18:13,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:18:13,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 147 [2020-10-28 10:18:13,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:18:13,528 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:18:13,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:18:13,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:18:13,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-28 10:18:13,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:18:13,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2020-10-28 10:18:13,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:18:13,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:18:13,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:18:13,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 10:18:13,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:18:13,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-28 10:18:13,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:18:13,633 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:18:13,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:18:13,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-28 10:18:13,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:18:13,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:18:13,743 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 186 proven. 58 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-28 10:18:13,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1410658937] [2020-10-28 10:18:13,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:18:13,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 10:18:13,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257280837] [2020-10-28 10:18:13,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 10:18:13,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:18:13,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 10:18:13,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-28 10:18:13,745 INFO L87 Difference]: Start difference. First operand 74412 states and 99873 transitions. Second operand 9 states. [2020-10-28 10:18:14,017 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:18:14,556 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:18:18,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:18:18,849 INFO L93 Difference]: Finished difference Result 132089 states and 182235 transitions. [2020-10-28 10:18:18,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 10:18:18,849 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 363 [2020-10-28 10:18:18,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:18:19,152 INFO L225 Difference]: With dead ends: 132089 [2020-10-28 10:18:19,153 INFO L226 Difference]: Without dead ends: 74024 [2020-10-28 10:18:19,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-10-28 10:18:19,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74024 states. [2020-10-28 10:18:21,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74024 to 73408. [2020-10-28 10:18:21,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73408 states. [2020-10-28 10:18:22,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73408 states to 73408 states and 94241 transitions. [2020-10-28 10:18:22,146 INFO L78 Accepts]: Start accepts. Automaton has 73408 states and 94241 transitions. Word has length 363 [2020-10-28 10:18:22,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:18:22,147 INFO L481 AbstractCegarLoop]: Abstraction has 73408 states and 94241 transitions. [2020-10-28 10:18:22,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 10:18:22,147 INFO L276 IsEmpty]: Start isEmpty. Operand 73408 states and 94241 transitions. [2020-10-28 10:18:22,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2020-10-28 10:18:22,282 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:18:22,283 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:18:22,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 10:18:22,283 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:18:22,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:18:22,284 INFO L82 PathProgramCache]: Analyzing trace with hash 313592695, now seen corresponding path program 1 times [2020-10-28 10:18:22,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:18:22,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [30076944] [2020-10-28 10:18:22,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:18:22,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:18:22,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:18:22,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:18:22,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:18:23,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:18:26,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:18:27,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:18:27,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 405 [2020-10-28 10:18:27,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 10:18:27,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-10-28 10:18:27,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:18:27,393 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:18:27,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:18:27,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-28 10:18:27,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 117 [2020-10-28 10:18:27,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:18:27,698 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:18:27,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:18:27,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:18:27,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:18:27,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:18:27,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:18:27,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:18:27,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 10:18:27,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:18:27,714 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:18:27,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:18:27,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:18:27,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:18:27,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:18:27,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:18:27,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:18:27,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:18:27,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:18:27,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 10:18:27,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:18:27,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 10:18:27,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:18:27,871 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:18:27,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:18:27,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:18:27,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:18:27,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:18:27,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-28 10:18:27,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:18:27,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:18:27,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:18:27,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-28 10:18:27,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:18:27,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 10:18:27,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:18:27,892 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:18:27,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:18:27,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:18:27,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 10:18:27,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:18:27,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-28 10:18:27,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:18:27,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:18:27,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:18:27,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:18:27,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-28 10:18:27,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:18:27,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-28 10:18:27,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:18:27,928 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:18:27,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:18:27,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:18:27,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 10:18:27,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:18:27,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-28 10:18:27,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:18:27,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:18:28,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:18:28,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-28 10:18:28,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:18:28,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 172 [2020-10-28 10:18:28,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:18:28,135 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:18:28,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:18:28,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:18:28,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-28 10:18:28,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:18:28,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2020-10-28 10:18:28,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:18:28,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:18:28,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:18:28,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 10:18:28,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:18:28,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-28 10:18:28,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:18:28,237 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:18:28,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:18:28,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-28 10:18:28,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:18:28,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:18:28,429 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 212 proven. 43 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-10-28 10:18:28,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [30076944] [2020-10-28 10:18:28,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:18:28,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 10:18:28,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494696283] [2020-10-28 10:18:28,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 10:18:28,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:18:28,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 10:18:28,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 10:18:28,432 INFO L87 Difference]: Start difference. First operand 73408 states and 94241 transitions. Second operand 8 states. [2020-10-28 10:18:28,703 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:18:32,213 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:18:33,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:18:33,950 INFO L93 Difference]: Finished difference Result 136873 states and 178537 transitions. [2020-10-28 10:18:33,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 10:18:33,950 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 385 [2020-10-28 10:18:33,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:18:34,142 INFO L225 Difference]: With dead ends: 136873 [2020-10-28 10:18:34,142 INFO L226 Difference]: Without dead ends: 65187 [2020-10-28 10:18:34,212 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-28 10:18:34,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65187 states. [2020-10-28 10:18:35,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65187 to 61059. [2020-10-28 10:18:35,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61059 states. [2020-10-28 10:18:35,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61059 states to 61059 states and 75281 transitions. [2020-10-28 10:18:35,706 INFO L78 Accepts]: Start accepts. Automaton has 61059 states and 75281 transitions. Word has length 385 [2020-10-28 10:18:35,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:18:35,707 INFO L481 AbstractCegarLoop]: Abstraction has 61059 states and 75281 transitions. [2020-10-28 10:18:35,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 10:18:35,707 INFO L276 IsEmpty]: Start isEmpty. Operand 61059 states and 75281 transitions. [2020-10-28 10:18:36,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2020-10-28 10:18:36,079 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:18:36,079 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:18:36,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 10:18:36,080 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:18:36,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:18:36,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1433361579, now seen corresponding path program 1 times [2020-10-28 10:18:36,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:18:36,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1449719461] [2020-10-28 10:18:36,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:18:36,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:18:36,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:18:36,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:18:37,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:18:39,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:18:41,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:18:41,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 400 [2020-10-28 10:18:41,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 10:18:41,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-28 10:18:41,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:18:41,226 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:18:41,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:18:41,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:18:41,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-28 10:18:41,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:18:41,514 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:18:41,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:18:41,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:18:41,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:18:41,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:18:41,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:18:41,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:18:41,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-28 10:18:41,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:18:41,555 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:18:41,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:18:41,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:18:41,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:18:41,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:18:41,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:18:41,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:18:41,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:18:41,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:18:41,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 10:18:41,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:18:41,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 136 [2020-10-28 10:18:41,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:18:41,817 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:18:41,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:18:41,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:18:41,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-28 10:18:41,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:18:41,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-10-28 10:18:41,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:18:41,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:18:41,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:18:41,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 10:18:41,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:18:41,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-10-28 10:18:41,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:18:41,961 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:18:41,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:18:41,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-28 10:18:41,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:18:41,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:18:41,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2020-10-28 10:18:42,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:18:42,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:18:42,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:18:42,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 10:18:42,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:18:42,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-28 10:18:42,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:18:42,030 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:18:42,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:18:42,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-28 10:18:42,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:18:42,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:18:42,215 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 164 proven. 88 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-10-28 10:18:42,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1449719461] [2020-10-28 10:18:42,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:18:42,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:18:42,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586325532] [2020-10-28 10:18:42,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:18:42,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:18:42,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:18:42,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:18:42,217 INFO L87 Difference]: Start difference. First operand 61059 states and 75281 transitions. Second operand 7 states. [2020-10-28 10:18:42,494 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 160