/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=DEEPEST --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/array-programs/copysome2-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 14:51:43,110 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 14:51:43,114 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 14:51:43,151 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 14:51:43,152 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 14:51:43,154 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 14:51:43,155 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 14:51:43,158 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 14:51:43,160 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 14:51:43,161 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 14:51:43,163 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 14:51:43,165 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 14:51:43,165 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 14:51:43,167 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 14:51:43,168 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 14:51:43,170 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 14:51:43,171 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 14:51:43,172 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 14:51:43,175 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 14:51:43,178 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 14:51:43,180 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 14:51:43,182 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 14:51:43,183 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 14:51:43,185 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 14:51:43,188 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 14:51:43,189 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 14:51:43,189 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 14:51:43,190 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 14:51:43,191 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 14:51:43,192 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 14:51:43,192 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 14:51:43,194 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 14:51:43,194 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 14:51:43,196 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 14:51:43,197 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 14:51:43,197 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 14:51:43,198 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 14:51:43,199 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 14:51:43,199 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 14:51:43,203 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 14:51:43,205 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 14:51:43,206 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 [2020-10-27 14:51:43,259 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 14:51:43,260 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 14:51:43,265 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 14:51:43,265 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 14:51:43,265 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 14:51:43,265 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 14:51:43,266 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 14:51:43,266 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 14:51:43,266 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 14:51:43,266 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 14:51:43,267 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 14:51:43,268 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 14:51:43,268 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 14:51:43,268 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 14:51:43,268 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 14:51:43,269 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 14:51:43,269 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 14:51:43,269 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 14:51:43,269 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 14:51:43,269 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 14:51:43,270 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 14:51:43,270 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:51:43,270 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 14:51:43,271 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 14:51:43,271 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 14:51:43,271 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 14:51:43,271 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 14:51:43,271 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 14:51:43,272 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 14:51:43,272 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 14:51:43,729 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 14:51:43,756 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 14:51:43,759 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 14:51:43,761 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 14:51:43,762 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 14:51:43,763 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-programs/copysome2-2.i [2020-10-27 14:51:43,859 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/005de0535/b7597d034b25473baaf7d658149ff1fe/FLAGadd9628a9 [2020-10-27 14:51:44,591 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 14:51:44,593 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-programs/copysome2-2.i [2020-10-27 14:51:44,602 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/005de0535/b7597d034b25473baaf7d658149ff1fe/FLAGadd9628a9 [2020-10-27 14:51:44,910 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/005de0535/b7597d034b25473baaf7d658149ff1fe [2020-10-27 14:51:44,913 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 14:51:44,921 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 14:51:44,923 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 14:51:44,923 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 14:51:44,929 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 14:51:44,931 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:51:44" (1/1) ... [2020-10-27 14:51:44,936 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@239246af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:51:44, skipping insertion in model container [2020-10-27 14:51:44,936 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:51:44" (1/1) ... [2020-10-27 14:51:44,945 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 14:51:44,966 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 14:51:45,140 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:51:45,149 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 14:51:45,176 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:51:45,193 INFO L208 MainTranslator]: Completed translation [2020-10-27 14:51:45,194 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:51:45 WrapperNode [2020-10-27 14:51:45,194 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 14:51:45,195 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 14:51:45,196 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 14:51:45,196 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 14:51:45,210 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:51:45" (1/1) ... [2020-10-27 14:51:45,210 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:51:45" (1/1) ... [2020-10-27 14:51:45,219 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:51:45" (1/1) ... [2020-10-27 14:51:45,219 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:51:45" (1/1) ... [2020-10-27 14:51:45,229 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:51:45" (1/1) ... [2020-10-27 14:51:45,235 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:51:45" (1/1) ... [2020-10-27 14:51:45,237 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:51:45" (1/1) ... [2020-10-27 14:51:45,240 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 14:51:45,241 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 14:51:45,241 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 14:51:45,242 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 14:51:45,242 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:51:45" (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 [2020-10-27 14:51:45,321 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 14:51:45,321 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 14:51:45,321 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 14:51:45,322 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 14:51:45,322 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 14:51:45,322 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 14:51:45,322 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 14:51:45,322 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 14:51:45,323 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 14:51:45,323 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 14:51:45,323 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 14:51:45,323 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 14:51:45,323 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 14:51:45,324 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 14:51:45,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 14:51:45,324 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 14:51:45,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 14:51:45,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 14:51:45,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 14:51:45,325 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 14:51:45,879 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 14:51:45,880 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-27 14:51:45,882 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:51:45 BoogieIcfgContainer [2020-10-27 14:51:45,882 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 14:51:45,887 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 14:51:45,887 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 14:51:45,890 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 14:51:45,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:51:44" (1/3) ... [2020-10-27 14:51:45,892 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@233e8a87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:51:45, skipping insertion in model container [2020-10-27 14:51:45,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:51:45" (2/3) ... [2020-10-27 14:51:45,893 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@233e8a87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:51:45, skipping insertion in model container [2020-10-27 14:51:45,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:51:45" (3/3) ... [2020-10-27 14:51:45,896 INFO L111 eAbstractionObserver]: Analyzing ICFG copysome2-2.i [2020-10-27 14:51:45,909 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 14:51:45,915 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 14:51:45,931 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 14:51:45,980 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 14:51:45,981 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 14:51:45,981 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 14:51:45,981 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 14:51:45,981 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 14:51:45,981 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 14:51:45,981 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 14:51:45,982 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 14:51:46,005 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-10-27 14:51:46,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 14:51:46,017 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:51:46,018 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:51:46,019 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:51:46,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:51:46,036 INFO L82 PathProgramCache]: Analyzing trace with hash -843734543, now seen corresponding path program 1 times [2020-10-27 14:51:46,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:51:46,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [608317373] [2020-10-27 14:51:46,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:51:46,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:51:46,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:46,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:46,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:46,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:51:46,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 14:51:46,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:51:46,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 416 [2020-10-27 14:51:46,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:51:46,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:51:46,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 14:51:46,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 14:51:46,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 14:51:46,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:51:46,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:51:46,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:46,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:51:46,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:51:46,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:51:46,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 14:51:46,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:51:46,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:51:46,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:51:46,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:51:46,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:51:46,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:51:46,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [608317373] [2020-10-27 14:51:46,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:51:46,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 14:51:46,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067025009] [2020-10-27 14:51:46,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 14:51:46,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:51:46,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 14:51:46,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:51:46,784 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 4 states. [2020-10-27 14:51:46,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:51:46,942 INFO L93 Difference]: Finished difference Result 71 states and 101 transitions. [2020-10-27 14:51:46,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 14:51:46,944 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-27 14:51:46,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:51:46,952 INFO L225 Difference]: With dead ends: 71 [2020-10-27 14:51:46,952 INFO L226 Difference]: Without dead ends: 37 [2020-10-27 14:51:46,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:51:46,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-27 14:51:47,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2020-10-27 14:51:47,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-27 14:51:47,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2020-10-27 14:51:47,020 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 19 [2020-10-27 14:51:47,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:51:47,021 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2020-10-27 14:51:47,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 14:51:47,021 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2020-10-27 14:51:47,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 14:51:47,022 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:51:47,022 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] [2020-10-27 14:51:47,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 14:51:47,023 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:51:47,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:51:47,024 INFO L82 PathProgramCache]: Analyzing trace with hash 577044293, now seen corresponding path program 1 times [2020-10-27 14:51:47,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:51:47,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [419474426] [2020-10-27 14:51:47,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:51:47,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:51:47,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:47,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:47,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:47,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:50,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:51:50,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 14:51:50,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:51:50,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3547 [2020-10-27 14:51:50,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:51:50,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 14:51:50,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:51:50,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 14:51:50,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 14:51:50,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:51:50,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:51:50,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:50,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:51:50,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:51:50,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:51:50,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 14:51:50,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:51:50,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:51:50,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:51:50,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:51:50,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:51:50,879 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 14:51:50,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [419474426] [2020-10-27 14:51:50,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:51:50,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 14:51:50,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886614791] [2020-10-27 14:51:50,884 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 14:51:50,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:51:50,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 14:51:50,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:51:50,894 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand 9 states. [2020-10-27 14:51:51,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:51:51,398 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2020-10-27 14:51:51,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 14:51:51,399 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-10-27 14:51:51,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:51:51,402 INFO L225 Difference]: With dead ends: 57 [2020-10-27 14:51:51,402 INFO L226 Difference]: Without dead ends: 53 [2020-10-27 14:51:51,404 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:51:51,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-27 14:51:51,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 42. [2020-10-27 14:51:51,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-27 14:51:51,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2020-10-27 14:51:51,419 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 27 [2020-10-27 14:51:51,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:51:51,420 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2020-10-27 14:51:51,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 14:51:51,420 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2020-10-27 14:51:51,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 14:51:51,421 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:51:51,421 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] [2020-10-27 14:51:51,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 14:51:51,422 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:51:51,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:51:51,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1278108871, now seen corresponding path program 1 times [2020-10-27 14:51:51,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:51:51,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1302626380] [2020-10-27 14:51:51,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:51:51,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:51:51,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:51,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:51,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:51,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:51,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:51,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:52,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:53,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:51:53,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 14:51:53,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 14:51:53,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1693 [2020-10-27 14:51:53,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:51:53,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 14:51:53,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:51:53,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 14:51:53,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:51:53,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:51:53,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:51:53,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:53,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:51:53,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:51:53,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:51:53,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:51:53,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:51:53,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:51:53,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:51:53,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:51:53,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:51:53,195 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 14:51:53,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1302626380] [2020-10-27 14:51:53,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:51:53,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 14:51:53,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297932078] [2020-10-27 14:51:53,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 14:51:53,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:51:53,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 14:51:53,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:51:53,199 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 5 states. [2020-10-27 14:51:53,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:51:53,344 INFO L93 Difference]: Finished difference Result 80 states and 99 transitions. [2020-10-27 14:51:53,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 14:51:53,345 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-10-27 14:51:53,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:51:53,346 INFO L225 Difference]: With dead ends: 80 [2020-10-27 14:51:53,346 INFO L226 Difference]: Without dead ends: 47 [2020-10-27 14:51:53,347 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:51:53,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-27 14:51:53,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2020-10-27 14:51:53,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-27 14:51:53,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2020-10-27 14:51:53,356 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 27 [2020-10-27 14:51:53,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:51:53,356 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2020-10-27 14:51:53,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 14:51:53,357 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2020-10-27 14:51:53,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 14:51:53,358 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:51:53,358 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 14:51:53,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 14:51:53,359 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:51:53,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:51:53,360 INFO L82 PathProgramCache]: Analyzing trace with hash -809283652, now seen corresponding path program 2 times [2020-10-27 14:51:53,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:51:53,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1520377508] [2020-10-27 14:51:53,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:51:53,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:51:53,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:53,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:53,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:53,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:58,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:51:58,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 14:51:58,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:51:58,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 14:51:58,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:51:58,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 14:51:58,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-27 14:51:58,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 14:51:58,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:51:58,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:51:58,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:51:58,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:58,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:51:58,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:51:58,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:51:58,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:51:58,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:51:58,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:51:58,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:51:58,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:51:58,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:51:58,498 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-27 14:51:58,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1520377508] [2020-10-27 14:51:58,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:51:58,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 14:51:58,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019306998] [2020-10-27 14:51:58,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 14:51:58,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:51:58,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 14:51:58,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:51:58,503 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand 6 states. [2020-10-27 14:51:58,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:51:58,663 INFO L93 Difference]: Finished difference Result 82 states and 102 transitions. [2020-10-27 14:51:58,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 14:51:58,664 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 35 [2020-10-27 14:51:58,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:51:58,665 INFO L225 Difference]: With dead ends: 82 [2020-10-27 14:51:58,665 INFO L226 Difference]: Without dead ends: 53 [2020-10-27 14:51:58,666 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:51:58,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-27 14:51:58,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 48. [2020-10-27 14:51:58,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-27 14:51:58,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2020-10-27 14:51:58,674 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 35 [2020-10-27 14:51:58,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:51:58,675 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2020-10-27 14:51:58,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 14:51:58,675 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2020-10-27 14:51:58,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 14:51:58,676 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:51:58,677 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:51:58,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 14:51:58,677 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:51:58,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:51:58,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1249984479, now seen corresponding path program 3 times [2020-10-27 14:51:58,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:51:58,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1618652401] [2020-10-27 14:51:58,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:51:58,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:51:58,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:58,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:58,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:59,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:03,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:03,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 14:52:03,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:52:03,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 14:52:03,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:03,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:52:03,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-27 14:52:03,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 14:52:03,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:03,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:52:03,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:03,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:03,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:03,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:52:03,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:52:03,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:52:03,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:03,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:52:03,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:52:03,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:52:03,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:03,795 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-27 14:52:03,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1618652401] [2020-10-27 14:52:03,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:52:03,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 14:52:03,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710980525] [2020-10-27 14:52:03,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 14:52:03,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:52:03,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 14:52:03,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:52:03,805 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand 7 states. [2020-10-27 14:52:04,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:52:04,016 INFO L93 Difference]: Finished difference Result 96 states and 120 transitions. [2020-10-27 14:52:04,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 14:52:04,016 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 43 [2020-10-27 14:52:04,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:52:04,018 INFO L225 Difference]: With dead ends: 96 [2020-10-27 14:52:04,018 INFO L226 Difference]: Without dead ends: 61 [2020-10-27 14:52:04,020 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:52:04,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-27 14:52:04,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 56. [2020-10-27 14:52:04,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-27 14:52:04,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2020-10-27 14:52:04,029 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 43 [2020-10-27 14:52:04,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:52:04,029 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2020-10-27 14:52:04,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 14:52:04,029 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2020-10-27 14:52:04,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 14:52:04,030 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:52:04,030 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:52:04,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 14:52:04,031 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:52:04,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:52:04,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1465153320, now seen corresponding path program 4 times [2020-10-27 14:52:04,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:52:04,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [250381455] [2020-10-27 14:52:04,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:52:04,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:04,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:04,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:04,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:09,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:09,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 14:52:09,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:52:09,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-27 14:52:09,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:09,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 14:52:09,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-27 14:52:09,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 14:52:09,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:09,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:52:09,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:09,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:09,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:09,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:52:09,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:52:09,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:52:09,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:09,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:52:09,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:52:09,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:52:09,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:09,196 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-10-27 14:52:09,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [250381455] [2020-10-27 14:52:09,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:52:09,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 14:52:09,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470144870] [2020-10-27 14:52:09,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 14:52:09,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:52:09,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 14:52:09,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:52:09,204 INFO L87 Difference]: Start difference. First operand 56 states and 67 transitions. Second operand 8 states. [2020-10-27 14:52:09,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:52:09,435 INFO L93 Difference]: Finished difference Result 110 states and 138 transitions. [2020-10-27 14:52:09,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 14:52:09,436 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2020-10-27 14:52:09,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:52:09,437 INFO L225 Difference]: With dead ends: 110 [2020-10-27 14:52:09,437 INFO L226 Difference]: Without dead ends: 69 [2020-10-27 14:52:09,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:52:09,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-27 14:52:09,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 64. [2020-10-27 14:52:09,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-27 14:52:09,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2020-10-27 14:52:09,447 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 51 [2020-10-27 14:52:09,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:52:09,447 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2020-10-27 14:52:09,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 14:52:09,447 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2020-10-27 14:52:09,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 14:52:09,448 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:52:09,449 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:52:09,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 14:52:09,449 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:52:09,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:52:09,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1854232835, now seen corresponding path program 5 times [2020-10-27 14:52:09,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:52:09,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [58649468] [2020-10-27 14:52:09,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:52:09,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:09,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:09,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:09,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:14,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:14,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 14:52:14,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:52:14,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 14:52:14,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:14,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 14:52:14,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-27 14:52:14,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 14:52:14,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:14,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:52:14,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:14,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:14,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:14,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:52:14,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:52:14,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:52:14,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:14,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:52:14,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:52:14,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:52:14,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:52:14,600 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-10-27 14:52:14,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [58649468] [2020-10-27 14:52:14,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:52:14,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 14:52:14,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614663348] [2020-10-27 14:52:14,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 14:52:14,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:52:14,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 14:52:14,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:52:14,603 INFO L87 Difference]: Start difference. First operand 64 states and 77 transitions. Second operand 9 states. [2020-10-27 14:52:14,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:52:14,858 INFO L93 Difference]: Finished difference Result 124 states and 156 transitions. [2020-10-27 14:52:14,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 14:52:14,858 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 59 [2020-10-27 14:52:14,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:52:14,860 INFO L225 Difference]: With dead ends: 124 [2020-10-27 14:52:14,860 INFO L226 Difference]: Without dead ends: 77 [2020-10-27 14:52:14,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:52:14,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-27 14:52:14,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 72. [2020-10-27 14:52:14,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-27 14:52:14,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 87 transitions. [2020-10-27 14:52:14,869 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 87 transitions. Word has length 59 [2020-10-27 14:52:14,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:52:14,870 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 87 transitions. [2020-10-27 14:52:14,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 14:52:14,870 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 87 transitions. [2020-10-27 14:52:14,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 14:52:14,871 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:52:14,871 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:52:14,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 14:52:14,872 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:52:14,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:52:14,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1205696500, now seen corresponding path program 6 times [2020-10-27 14:52:14,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:52:14,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [956717841] [2020-10-27 14:52:14,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:52:14,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:14,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:14,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:15,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:19,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:19,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 14:52:19,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:52:19,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-27 14:52:19,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:19,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:52:19,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-27 14:52:19,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 14:52:19,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:20,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:52:20,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:20,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:20,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:20,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:52:20,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:52:20,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:52:20,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:20,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:52:20,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:52:20,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:52:20,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:20,068 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2020-10-27 14:52:20,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [956717841] [2020-10-27 14:52:20,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:52:20,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 14:52:20,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425539314] [2020-10-27 14:52:20,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:52:20,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:52:20,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:52:20,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:52:20,073 INFO L87 Difference]: Start difference. First operand 72 states and 87 transitions. Second operand 10 states. [2020-10-27 14:52:20,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:52:20,392 INFO L93 Difference]: Finished difference Result 138 states and 174 transitions. [2020-10-27 14:52:20,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 14:52:20,392 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 67 [2020-10-27 14:52:20,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:52:20,393 INFO L225 Difference]: With dead ends: 138 [2020-10-27 14:52:20,393 INFO L226 Difference]: Without dead ends: 85 [2020-10-27 14:52:20,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:52:20,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-27 14:52:20,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 80. [2020-10-27 14:52:20,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-27 14:52:20,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 97 transitions. [2020-10-27 14:52:20,410 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 97 transitions. Word has length 67 [2020-10-27 14:52:20,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:52:20,410 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 97 transitions. [2020-10-27 14:52:20,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:52:20,410 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 97 transitions. [2020-10-27 14:52:20,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-27 14:52:20,412 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:52:20,412 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:52:20,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 14:52:20,412 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:52:20,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:52:20,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1564888103, now seen corresponding path program 7 times [2020-10-27 14:52:20,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:52:20,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1900921828] [2020-10-27 14:52:20,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:52:20,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:20,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:20,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:20,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:25,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:25,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-27 14:52:25,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:52:25,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-27 14:52:25,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:25,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 14:52:25,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-27 14:52:25,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 14:52:25,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:25,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:52:25,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:25,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:25,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:25,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:52:25,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:52:25,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:52:25,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:25,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:52:25,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:52:25,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:52:25,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 14:52:25,629 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2020-10-27 14:52:25,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1900921828] [2020-10-27 14:52:25,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:52:25,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 14:52:25,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107191160] [2020-10-27 14:52:25,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 14:52:25,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:52:25,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 14:52:25,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:52:25,637 INFO L87 Difference]: Start difference. First operand 80 states and 97 transitions. Second operand 11 states. [2020-10-27 14:52:25,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:52:25,973 INFO L93 Difference]: Finished difference Result 152 states and 192 transitions. [2020-10-27 14:52:25,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 14:52:25,973 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 75 [2020-10-27 14:52:25,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:52:25,974 INFO L225 Difference]: With dead ends: 152 [2020-10-27 14:52:25,974 INFO L226 Difference]: Without dead ends: 93 [2020-10-27 14:52:25,976 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:52:25,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-27 14:52:25,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 88. [2020-10-27 14:52:25,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-27 14:52:25,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 107 transitions. [2020-10-27 14:52:25,997 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 107 transitions. Word has length 75 [2020-10-27 14:52:25,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:52:25,999 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 107 transitions. [2020-10-27 14:52:25,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 14:52:25,999 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 107 transitions. [2020-10-27 14:52:26,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-27 14:52:26,001 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:52:26,001 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:52:26,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 14:52:26,002 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:52:26,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:52:26,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1246880496, now seen corresponding path program 8 times [2020-10-27 14:52:26,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:52:26,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2114954552] [2020-10-27 14:52:26,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:52:26,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:26,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:26,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:26,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:31,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:31,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-27 14:52:31,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:52:31,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-27 14:52:31,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:31,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:52:31,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-27 14:52:31,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 14:52:31,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:31,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:52:31,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:31,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:31,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:31,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:52:31,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:52:31,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:52:31,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:31,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:52:31,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:52:31,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:52:31,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:31,235 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2020-10-27 14:52:31,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2114954552] [2020-10-27 14:52:31,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:52:31,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:52:31,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085051591] [2020-10-27 14:52:31,236 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:52:31,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:52:31,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:52:31,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:52:31,238 INFO L87 Difference]: Start difference. First operand 88 states and 107 transitions. Second operand 12 states. [2020-10-27 14:52:31,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:52:31,591 INFO L93 Difference]: Finished difference Result 166 states and 210 transitions. [2020-10-27 14:52:31,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 14:52:31,592 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 83 [2020-10-27 14:52:31,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:52:31,593 INFO L225 Difference]: With dead ends: 166 [2020-10-27 14:52:31,593 INFO L226 Difference]: Without dead ends: 101 [2020-10-27 14:52:31,594 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:52:31,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-27 14:52:31,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 96. [2020-10-27 14:52:31,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-27 14:52:31,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 117 transitions. [2020-10-27 14:52:31,613 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 117 transitions. Word has length 83 [2020-10-27 14:52:31,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:52:31,613 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 117 transitions. [2020-10-27 14:52:31,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:52:31,614 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 117 transitions. [2020-10-27 14:52:31,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-27 14:52:31,620 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:52:31,620 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:52:31,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 14:52:31,620 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:52:31,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:52:31,621 INFO L82 PathProgramCache]: Analyzing trace with hash -392370507, now seen corresponding path program 9 times [2020-10-27 14:52:31,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:52:31,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [866957642] [2020-10-27 14:52:31,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:52:31,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:31,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:31,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:32,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:36,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:36,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-27 14:52:36,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:52:36,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5170 [2020-10-27 14:52:36,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:36,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 14:52:36,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 60 [2020-10-27 14:52:36,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 14:52:36,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:36,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:52:36,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:36,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:36,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:36,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:52:36,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:52:36,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:52:36,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:36,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:52:36,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:52:37,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:52:37,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 14:52:37,022 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2020-10-27 14:52:37,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [866957642] [2020-10-27 14:52:37,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:52:37,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 14:52:37,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120229951] [2020-10-27 14:52:37,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 14:52:37,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:52:37,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 14:52:37,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:52:37,028 INFO L87 Difference]: Start difference. First operand 96 states and 117 transitions. Second operand 13 states. [2020-10-27 14:52:37,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:52:37,523 INFO L93 Difference]: Finished difference Result 180 states and 228 transitions. [2020-10-27 14:52:37,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 14:52:37,524 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 91 [2020-10-27 14:52:37,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:52:37,526 INFO L225 Difference]: With dead ends: 180 [2020-10-27 14:52:37,526 INFO L226 Difference]: Without dead ends: 109 [2020-10-27 14:52:37,528 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:52:37,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-27 14:52:37,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 104. [2020-10-27 14:52:37,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-27 14:52:37,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 127 transitions. [2020-10-27 14:52:37,553 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 127 transitions. Word has length 91 [2020-10-27 14:52:37,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:52:37,554 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 127 transitions. [2020-10-27 14:52:37,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 14:52:37,556 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 127 transitions. [2020-10-27 14:52:37,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-27 14:52:37,562 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:52:37,564 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:52:37,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 14:52:37,564 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:52:37,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:52:37,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1987213356, now seen corresponding path program 10 times [2020-10-27 14:52:37,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:52:37,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [773987068] [2020-10-27 14:52:37,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:52:37,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:37,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:37,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:38,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:42,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:42,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-27 14:52:42,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:52:42,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5044 [2020-10-27 14:52:42,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:42,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:52:42,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 65 [2020-10-27 14:52:42,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 14:52:42,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:42,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:52:42,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:42,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:42,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:42,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:52:42,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:52:42,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:52:42,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:42,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:52:42,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:52:42,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:52:42,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:42,853 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2020-10-27 14:52:42,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [773987068] [2020-10-27 14:52:42,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:52:42,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:52:42,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35923748] [2020-10-27 14:52:42,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:52:42,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:52:42,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:52:42,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:52:42,855 INFO L87 Difference]: Start difference. First operand 104 states and 127 transitions. Second operand 14 states. [2020-10-27 14:52:43,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:52:43,194 INFO L93 Difference]: Finished difference Result 194 states and 246 transitions. [2020-10-27 14:52:43,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 14:52:43,195 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 99 [2020-10-27 14:52:43,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:52:43,196 INFO L225 Difference]: With dead ends: 194 [2020-10-27 14:52:43,196 INFO L226 Difference]: Without dead ends: 117 [2020-10-27 14:52:43,197 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:52:43,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-27 14:52:43,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 112. [2020-10-27 14:52:43,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-27 14:52:43,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 137 transitions. [2020-10-27 14:52:43,207 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 137 transitions. Word has length 99 [2020-10-27 14:52:43,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:52:43,210 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 137 transitions. [2020-10-27 14:52:43,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:52:43,210 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 137 transitions. [2020-10-27 14:52:43,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-27 14:52:43,211 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:52:43,211 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:52:43,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 14:52:43,212 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:52:43,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:52:43,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1786429551, now seen corresponding path program 11 times [2020-10-27 14:52:43,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:52:43,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [797258382] [2020-10-27 14:52:43,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:52:43,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:43,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:43,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:43,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:48,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:48,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-27 14:52:48,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:52:48,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5062 [2020-10-27 14:52:48,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:48,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 14:52:48,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 70 [2020-10-27 14:52:48,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 14:52:48,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:48,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:52:48,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:48,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:48,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:48,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:52:48,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:52:48,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:52:48,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:48,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:52:48,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:52:48,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:52:48,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:52:48,515 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2020-10-27 14:52:48,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [797258382] [2020-10-27 14:52:48,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:52:48,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 14:52:48,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970026692] [2020-10-27 14:52:48,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 14:52:48,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:52:48,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 14:52:48,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:52:48,520 INFO L87 Difference]: Start difference. First operand 112 states and 137 transitions. Second operand 15 states. [2020-10-27 14:52:48,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:52:48,927 INFO L93 Difference]: Finished difference Result 208 states and 264 transitions. [2020-10-27 14:52:48,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 14:52:48,927 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 107 [2020-10-27 14:52:48,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:52:48,929 INFO L225 Difference]: With dead ends: 208 [2020-10-27 14:52:48,929 INFO L226 Difference]: Without dead ends: 125 [2020-10-27 14:52:48,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:52:48,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-27 14:52:48,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 120. [2020-10-27 14:52:48,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-27 14:52:48,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 147 transitions. [2020-10-27 14:52:48,937 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 147 transitions. Word has length 107 [2020-10-27 14:52:48,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:52:48,938 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 147 transitions. [2020-10-27 14:52:48,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 14:52:48,938 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 147 transitions. [2020-10-27 14:52:48,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-27 14:52:48,939 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:52:48,939 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:52:48,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 14:52:48,939 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:52:48,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:52:48,940 INFO L82 PathProgramCache]: Analyzing trace with hash -360740536, now seen corresponding path program 12 times [2020-10-27 14:52:48,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:52:48,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1274934156] [2020-10-27 14:52:48,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:52:48,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:48,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:49,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:50,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:54,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:54,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-27 14:52:54,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:52:54,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-27 14:52:54,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:54,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:52:54,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-27 14:52:54,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 14:52:54,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:54,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:52:54,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:54,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:54,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:54,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:52:54,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:52:54,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:52:54,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:54,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:52:54,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:52:54,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:52:54,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:54,248 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2020-10-27 14:52:54,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1274934156] [2020-10-27 14:52:54,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:52:54,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:52:54,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876684820] [2020-10-27 14:52:54,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:52:54,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:52:54,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:52:54,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:52:54,255 INFO L87 Difference]: Start difference. First operand 120 states and 147 transitions. Second operand 16 states. [2020-10-27 14:52:54,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:52:54,679 INFO L93 Difference]: Finished difference Result 222 states and 282 transitions. [2020-10-27 14:52:54,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 14:52:54,680 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 115 [2020-10-27 14:52:54,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:52:54,681 INFO L225 Difference]: With dead ends: 222 [2020-10-27 14:52:54,681 INFO L226 Difference]: Without dead ends: 133 [2020-10-27 14:52:54,682 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:52:54,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-27 14:52:54,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 128. [2020-10-27 14:52:54,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-27 14:52:54,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 157 transitions. [2020-10-27 14:52:54,693 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 157 transitions. Word has length 115 [2020-10-27 14:52:54,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:52:54,693 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 157 transitions. [2020-10-27 14:52:54,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:52:54,693 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 157 transitions. [2020-10-27 14:52:54,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-27 14:52:54,695 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:52:54,695 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:52:54,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 14:52:54,695 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:52:54,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:52:54,696 INFO L82 PathProgramCache]: Analyzing trace with hash 785628781, now seen corresponding path program 13 times [2020-10-27 14:52:54,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:52:54,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1309765238] [2020-10-27 14:52:54,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:52:54,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:54,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:54,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:59,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:59,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-27 14:52:59,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:52:59,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5120 [2020-10-27 14:52:59,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:59,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 14:52:59,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-27 14:52:59,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 14:52:59,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:00,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:53:00,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:00,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:00,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:00,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:53:00,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:53:00,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:53:00,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:00,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:53:00,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:53:00,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:53:00,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:00,110 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 416 trivial. 0 not checked. [2020-10-27 14:53:00,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1309765238] [2020-10-27 14:53:00,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:53:00,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 14:53:00,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587870573] [2020-10-27 14:53:00,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 14:53:00,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:53:00,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 14:53:00,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:53:00,113 INFO L87 Difference]: Start difference. First operand 128 states and 157 transitions. Second operand 17 states. [2020-10-27 14:53:00,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:53:00,541 INFO L93 Difference]: Finished difference Result 236 states and 300 transitions. [2020-10-27 14:53:00,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 14:53:00,542 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 123 [2020-10-27 14:53:00,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:53:00,544 INFO L225 Difference]: With dead ends: 236 [2020-10-27 14:53:00,544 INFO L226 Difference]: Without dead ends: 141 [2020-10-27 14:53:00,545 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:53:00,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-27 14:53:00,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 136. [2020-10-27 14:53:00,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-27 14:53:00,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 167 transitions. [2020-10-27 14:53:00,556 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 167 transitions. Word has length 123 [2020-10-27 14:53:00,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:53:00,557 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 167 transitions. [2020-10-27 14:53:00,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 14:53:00,557 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 167 transitions. [2020-10-27 14:53:00,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-27 14:53:00,558 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:53:00,558 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:53:00,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 14:53:00,559 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:53:00,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:53:00,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1372958620, now seen corresponding path program 14 times [2020-10-27 14:53:00,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:53:00,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2075157177] [2020-10-27 14:53:00,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:53:00,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:00,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:00,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:05,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:05,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-10-27 14:53:05,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:53:05,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5229 [2020-10-27 14:53:05,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:05,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 14:53:05,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-27 14:53:05,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 14:53:05,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:06,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:53:06,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:06,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:06,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:06,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:53:06,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:53:06,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:53:06,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:06,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:53:06,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:53:06,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:53:06,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:06,104 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 483 trivial. 0 not checked. [2020-10-27 14:53:06,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2075157177] [2020-10-27 14:53:06,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:53:06,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 14:53:06,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282710386] [2020-10-27 14:53:06,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 14:53:06,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:53:06,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 14:53:06,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:53:06,107 INFO L87 Difference]: Start difference. First operand 136 states and 167 transitions. Second operand 18 states. [2020-10-27 14:53:06,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:53:06,577 INFO L93 Difference]: Finished difference Result 250 states and 318 transitions. [2020-10-27 14:53:06,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 14:53:06,578 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 131 [2020-10-27 14:53:06,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:53:06,579 INFO L225 Difference]: With dead ends: 250 [2020-10-27 14:53:06,579 INFO L226 Difference]: Without dead ends: 149 [2020-10-27 14:53:06,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:53:06,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-27 14:53:06,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 144. [2020-10-27 14:53:06,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-27 14:53:06,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 177 transitions. [2020-10-27 14:53:06,591 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 177 transitions. Word has length 131 [2020-10-27 14:53:06,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:53:06,591 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 177 transitions. [2020-10-27 14:53:06,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 14:53:06,592 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 177 transitions. [2020-10-27 14:53:06,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-27 14:53:06,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:53:06,593 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:53:06,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 14:53:06,593 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:53:06,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:53:06,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1393990839, now seen corresponding path program 15 times [2020-10-27 14:53:06,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:53:06,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [801682165] [2020-10-27 14:53:06,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:53:06,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:06,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:06,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:11,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:11,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-27 14:53:11,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:53:11,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5170 [2020-10-27 14:53:11,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:11,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 14:53:11,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-27 14:53:11,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 14:53:11,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:12,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:53:12,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:12,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:12,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:12,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:53:12,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:53:12,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:53:12,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:12,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:53:12,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:53:12,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:53:12,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:12,103 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2020-10-27 14:53:12,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [801682165] [2020-10-27 14:53:12,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:53:12,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 14:53:12,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366751034] [2020-10-27 14:53:12,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 14:53:12,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:53:12,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 14:53:12,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:53:12,106 INFO L87 Difference]: Start difference. First operand 144 states and 177 transitions. Second operand 19 states. [2020-10-27 14:53:12,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:53:12,649 INFO L93 Difference]: Finished difference Result 264 states and 336 transitions. [2020-10-27 14:53:12,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 14:53:12,649 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 139 [2020-10-27 14:53:12,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:53:12,650 INFO L225 Difference]: With dead ends: 264 [2020-10-27 14:53:12,650 INFO L226 Difference]: Without dead ends: 157 [2020-10-27 14:53:12,651 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:53:12,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-27 14:53:12,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 152. [2020-10-27 14:53:12,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-27 14:53:12,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 187 transitions. [2020-10-27 14:53:12,659 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 187 transitions. Word has length 139 [2020-10-27 14:53:12,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:53:12,660 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 187 transitions. [2020-10-27 14:53:12,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 14:53:12,660 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 187 transitions. [2020-10-27 14:53:12,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-27 14:53:12,661 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:53:12,662 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:53:12,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 14:53:12,662 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:53:12,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:53:12,662 INFO L82 PathProgramCache]: Analyzing trace with hash -104346240, now seen corresponding path program 16 times [2020-10-27 14:53:12,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:53:12,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1248866865] [2020-10-27 14:53:12,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:53:12,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:12,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:12,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:17,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:17,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 157 [2020-10-27 14:53:17,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:53:17,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-27 14:53:17,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:17,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 14:53:17,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-27 14:53:17,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 14:53:17,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:18,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:53:18,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:18,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:18,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:18,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:53:18,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:53:18,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:53:18,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:18,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:53:18,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:53:18,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:53:18,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:18,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 632 trivial. 0 not checked. [2020-10-27 14:53:18,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1248866865] [2020-10-27 14:53:18,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:53:18,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 14:53:18,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591287243] [2020-10-27 14:53:18,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 14:53:18,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:53:18,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 14:53:18,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:53:18,060 INFO L87 Difference]: Start difference. First operand 152 states and 187 transitions. Second operand 20 states. [2020-10-27 14:53:18,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:53:18,597 INFO L93 Difference]: Finished difference Result 278 states and 354 transitions. [2020-10-27 14:53:18,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 14:53:18,597 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 147 [2020-10-27 14:53:18,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:53:18,599 INFO L225 Difference]: With dead ends: 278 [2020-10-27 14:53:18,599 INFO L226 Difference]: Without dead ends: 165 [2020-10-27 14:53:18,600 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:53:18,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-27 14:53:18,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 160. [2020-10-27 14:53:18,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-27 14:53:18,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 197 transitions. [2020-10-27 14:53:18,608 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 197 transitions. Word has length 147 [2020-10-27 14:53:18,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:53:18,608 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 197 transitions. [2020-10-27 14:53:18,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 14:53:18,608 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 197 transitions. [2020-10-27 14:53:18,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-27 14:53:18,610 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:53:18,610 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:53:18,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 14:53:18,611 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:53:18,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:53:18,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1691931099, now seen corresponding path program 17 times [2020-10-27 14:53:18,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:53:18,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [569566001] [2020-10-27 14:53:18,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:53:18,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:18,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:18,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:23,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:23,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-10-27 14:53:23,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:53:23,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5049 [2020-10-27 14:53:23,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:23,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 14:53:23,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-27 14:53:23,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-27 14:53:23,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:24,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:53:24,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:24,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:24,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:24,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:53:24,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:53:24,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:53:24,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:24,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:53:24,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:53:24,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:53:24,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:24,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 714 trivial. 0 not checked. [2020-10-27 14:53:24,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [569566001] [2020-10-27 14:53:24,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:53:24,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 14:53:24,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614508410] [2020-10-27 14:53:24,060 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 14:53:24,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:53:24,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 14:53:24,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:53:24,061 INFO L87 Difference]: Start difference. First operand 160 states and 197 transitions. Second operand 21 states. [2020-10-27 14:53:24,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:53:24,637 INFO L93 Difference]: Finished difference Result 292 states and 372 transitions. [2020-10-27 14:53:24,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 14:53:24,638 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 155 [2020-10-27 14:53:24,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:53:24,639 INFO L225 Difference]: With dead ends: 292 [2020-10-27 14:53:24,639 INFO L226 Difference]: Without dead ends: 173 [2020-10-27 14:53:24,640 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:53:24,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-27 14:53:24,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 168. [2020-10-27 14:53:24,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-27 14:53:24,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 207 transitions. [2020-10-27 14:53:24,648 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 207 transitions. Word has length 155 [2020-10-27 14:53:24,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:53:24,648 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 207 transitions. [2020-10-27 14:53:24,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 14:53:24,649 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 207 transitions. [2020-10-27 14:53:24,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-10-27 14:53:24,650 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:53:24,650 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:53:24,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 14:53:24,651 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:53:24,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:53:24,651 INFO L82 PathProgramCache]: Analyzing trace with hash 28115100, now seen corresponding path program 18 times [2020-10-27 14:53:24,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:53:24,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2110178291] [2020-10-27 14:53:24,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:53:24,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:24,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:24,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:29,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:29,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 173 [2020-10-27 14:53:29,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:53:29,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5062 [2020-10-27 14:53:29,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:29,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 14:53:29,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-27 14:53:29,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 14:53:29,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:30,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:53:30,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:30,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:30,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:30,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:53:30,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:53:30,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:53:30,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:30,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:53:30,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:53:30,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:53:30,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:30,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 801 trivial. 0 not checked. [2020-10-27 14:53:30,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2110178291] [2020-10-27 14:53:30,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:53:30,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 14:53:30,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937262457] [2020-10-27 14:53:30,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 14:53:30,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:53:30,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 14:53:30,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:53:30,168 INFO L87 Difference]: Start difference. First operand 168 states and 207 transitions. Second operand 22 states. [2020-10-27 14:53:30,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:53:30,771 INFO L93 Difference]: Finished difference Result 306 states and 390 transitions. [2020-10-27 14:53:30,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 14:53:30,772 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 163 [2020-10-27 14:53:30,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:53:30,773 INFO L225 Difference]: With dead ends: 306 [2020-10-27 14:53:30,774 INFO L226 Difference]: Without dead ends: 181 [2020-10-27 14:53:30,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:53:30,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-27 14:53:30,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 176. [2020-10-27 14:53:30,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-10-27 14:53:30,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 217 transitions. [2020-10-27 14:53:30,783 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 217 transitions. Word has length 163 [2020-10-27 14:53:30,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:53:30,783 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 217 transitions. [2020-10-27 14:53:30,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 14:53:30,783 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 217 transitions. [2020-10-27 14:53:30,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-10-27 14:53:30,785 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:53:30,785 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:53:30,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 14:53:30,786 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:53:30,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:53:30,786 INFO L82 PathProgramCache]: Analyzing trace with hash 938352385, now seen corresponding path program 19 times [2020-10-27 14:53:30,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:53:30,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [275737463] [2020-10-27 14:53:30,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:53:30,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:30,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:30,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:35,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:35,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 181 [2020-10-27 14:53:35,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:53:35,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5156 [2020-10-27 14:53:35,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:35,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 14:53:35,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-27 14:53:35,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 14:53:35,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:36,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:53:36,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:36,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:36,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:36,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:53:36,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:53:36,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:53:36,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:36,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:53:36,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:53:36,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:53:36,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:36,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1425 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 893 trivial. 0 not checked. [2020-10-27 14:53:36,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [275737463] [2020-10-27 14:53:36,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:53:36,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 14:53:36,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960560656] [2020-10-27 14:53:36,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 14:53:36,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:53:36,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 14:53:36,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:53:36,389 INFO L87 Difference]: Start difference. First operand 176 states and 217 transitions. Second operand 23 states. [2020-10-27 14:53:36,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:53:36,945 INFO L93 Difference]: Finished difference Result 320 states and 408 transitions. [2020-10-27 14:53:36,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 14:53:36,946 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 171 [2020-10-27 14:53:36,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:53:36,948 INFO L225 Difference]: With dead ends: 320 [2020-10-27 14:53:36,948 INFO L226 Difference]: Without dead ends: 189 [2020-10-27 14:53:36,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:53:36,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-27 14:53:36,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 184. [2020-10-27 14:53:36,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-10-27 14:53:36,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 227 transitions. [2020-10-27 14:53:36,958 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 227 transitions. Word has length 171 [2020-10-27 14:53:36,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:53:36,958 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 227 transitions. [2020-10-27 14:53:36,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 14:53:36,958 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 227 transitions. [2020-10-27 14:53:36,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-10-27 14:53:36,960 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:53:36,960 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:53:36,961 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 14:53:36,961 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:53:36,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:53:36,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1445915064, now seen corresponding path program 20 times [2020-10-27 14:53:36,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:53:36,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2075524298] [2020-10-27 14:53:36,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:53:37,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:37,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:37,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:42,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:42,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 189 [2020-10-27 14:53:42,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:53:42,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5096 [2020-10-27 14:53:42,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:42,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 14:53:42,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-27 14:53:42,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 14:53:42,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:42,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:53:42,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:42,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:42,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:42,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:53:42,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:53:42,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:53:42,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:42,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:53:42,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:53:42,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:53:42,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:42,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1580 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2020-10-27 14:53:42,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2075524298] [2020-10-27 14:53:42,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:53:42,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 14:53:42,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356276631] [2020-10-27 14:53:42,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 14:53:42,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:53:42,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 14:53:42,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:53:42,563 INFO L87 Difference]: Start difference. First operand 184 states and 227 transitions. Second operand 24 states. [2020-10-27 14:53:43,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:53:43,232 INFO L93 Difference]: Finished difference Result 334 states and 426 transitions. [2020-10-27 14:53:43,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 14:53:43,237 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 179 [2020-10-27 14:53:43,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:53:43,238 INFO L225 Difference]: With dead ends: 334 [2020-10-27 14:53:43,238 INFO L226 Difference]: Without dead ends: 197 [2020-10-27 14:53:43,239 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:53:43,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-27 14:53:43,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 192. [2020-10-27 14:53:43,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-10-27 14:53:43,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 237 transitions. [2020-10-27 14:53:43,248 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 237 transitions. Word has length 179 [2020-10-27 14:53:43,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:53:43,248 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 237 transitions. [2020-10-27 14:53:43,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 14:53:43,248 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 237 transitions. [2020-10-27 14:53:43,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-10-27 14:53:43,249 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:53:43,249 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:53:43,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 14:53:43,250 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:53:43,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:53:43,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1801505315, now seen corresponding path program 21 times [2020-10-27 14:53:43,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:53:43,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [13507236] [2020-10-27 14:53:43,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:53:43,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:43,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:43,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:48,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:48,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 197 [2020-10-27 14:53:48,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:53:48,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5188 [2020-10-27 14:53:48,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:48,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 14:53:48,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-27 14:53:48,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-27 14:53:48,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:48,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:53:48,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:48,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:48,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:48,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:53:48,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:53:48,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:53:48,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:48,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:53:48,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:53:48,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:53:48,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:48,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1743 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 1092 trivial. 0 not checked. [2020-10-27 14:53:48,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [13507236] [2020-10-27 14:53:48,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:53:48,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 14:53:48,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515373321] [2020-10-27 14:53:48,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 14:53:48,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:53:48,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 14:53:48,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:53:48,979 INFO L87 Difference]: Start difference. First operand 192 states and 237 transitions. Second operand 25 states. [2020-10-27 14:53:49,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:53:49,689 INFO L93 Difference]: Finished difference Result 348 states and 444 transitions. [2020-10-27 14:53:49,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 14:53:49,690 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 187 [2020-10-27 14:53:49,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:53:49,691 INFO L225 Difference]: With dead ends: 348 [2020-10-27 14:53:49,691 INFO L226 Difference]: Without dead ends: 205 [2020-10-27 14:53:49,693 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:53:49,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-10-27 14:53:49,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 200. [2020-10-27 14:53:49,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-10-27 14:53:49,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 247 transitions. [2020-10-27 14:53:49,704 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 247 transitions. Word has length 187 [2020-10-27 14:53:49,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:53:49,704 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 247 transitions. [2020-10-27 14:53:49,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 14:53:49,705 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 247 transitions. [2020-10-27 14:53:49,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-10-27 14:53:49,706 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:53:49,706 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:53:49,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 14:53:49,706 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:53:49,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:53:49,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1134725332, now seen corresponding path program 22 times [2020-10-27 14:53:49,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:53:49,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1110386888] [2020-10-27 14:53:49,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:53:49,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:49,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:49,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:55,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:55,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 205 [2020-10-27 14:53:55,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:53:55,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5759 [2020-10-27 14:53:55,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:55,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 14:53:55,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-27 14:53:55,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-27 14:53:55,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:56,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:53:56,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:56,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:56,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:56,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:53:56,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:53:56,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:53:56,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:56,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:53:56,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:53:56,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:53:56,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:56,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1914 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 1199 trivial. 0 not checked. [2020-10-27 14:53:56,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1110386888] [2020-10-27 14:53:56,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:53:56,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 14:53:56,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838878019] [2020-10-27 14:53:56,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 14:53:56,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:53:56,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 14:53:56,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:53:56,035 INFO L87 Difference]: Start difference. First operand 200 states and 247 transitions. Second operand 26 states. [2020-10-27 14:53:56,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:53:56,715 INFO L93 Difference]: Finished difference Result 362 states and 462 transitions. [2020-10-27 14:53:56,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 14:53:56,715 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 195 [2020-10-27 14:53:56,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:53:56,717 INFO L225 Difference]: With dead ends: 362 [2020-10-27 14:53:56,717 INFO L226 Difference]: Without dead ends: 213 [2020-10-27 14:53:56,718 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:53:56,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-27 14:53:56,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 208. [2020-10-27 14:53:56,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-10-27 14:53:56,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 257 transitions. [2020-10-27 14:53:56,728 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 257 transitions. Word has length 195 [2020-10-27 14:53:56,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:53:56,728 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 257 transitions. [2020-10-27 14:53:56,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 14:53:56,728 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 257 transitions. [2020-10-27 14:53:56,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2020-10-27 14:53:56,730 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:53:56,730 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:53:56,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 14:53:56,730 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:53:56,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:53:56,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1248103751, now seen corresponding path program 23 times [2020-10-27 14:53:56,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:53:56,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [859941500] [2020-10-27 14:53:56,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:53:56,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:56,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:56,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:02,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:02,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 213 [2020-10-27 14:54:02,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:54:02,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5257 [2020-10-27 14:54:02,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:02,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 14:54:02,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-27 14:54:02,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-27 14:54:02,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:02,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:54:02,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:02,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:02,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:02,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:54:02,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:54:02,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:54:02,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:02,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:54:02,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:54:02,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:54:02,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:02,724 INFO L134 CoverageAnalysis]: Checked inductivity of 2093 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 1311 trivial. 0 not checked. [2020-10-27 14:54:02,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [859941500] [2020-10-27 14:54:02,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:54:02,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 14:54:02,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328921499] [2020-10-27 14:54:02,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 14:54:02,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:54:02,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 14:54:02,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:54:02,727 INFO L87 Difference]: Start difference. First operand 208 states and 257 transitions. Second operand 27 states. [2020-10-27 14:54:03,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:54:03,566 INFO L93 Difference]: Finished difference Result 376 states and 480 transitions. [2020-10-27 14:54:03,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 14:54:03,566 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 203 [2020-10-27 14:54:03,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:54:03,568 INFO L225 Difference]: With dead ends: 376 [2020-10-27 14:54:03,568 INFO L226 Difference]: Without dead ends: 221 [2020-10-27 14:54:03,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:54:03,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-27 14:54:03,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 216. [2020-10-27 14:54:03,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-10-27 14:54:03,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 267 transitions. [2020-10-27 14:54:03,578 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 267 transitions. Word has length 203 [2020-10-27 14:54:03,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:54:03,578 INFO L481 AbstractCegarLoop]: Abstraction has 216 states and 267 transitions. [2020-10-27 14:54:03,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 14:54:03,578 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 267 transitions. [2020-10-27 14:54:03,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-10-27 14:54:03,580 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:54:03,580 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:54:03,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 14:54:03,580 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:54:03,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:54:03,581 INFO L82 PathProgramCache]: Analyzing trace with hash 844946928, now seen corresponding path program 24 times [2020-10-27 14:54:03,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:54:03,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1040755582] [2020-10-27 14:54:03,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:54:03,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:03,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:03,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:08,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:08,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 221 [2020-10-27 14:54:08,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:54:08,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5077 [2020-10-27 14:54:08,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:08,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 14:54:08,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-27 14:54:08,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 14:54:08,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:09,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:54:09,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:09,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:09,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:09,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:54:09,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:54:09,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:54:09,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:09,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:54:09,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:54:09,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:54:09,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:09,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2280 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 1428 trivial. 0 not checked. [2020-10-27 14:54:09,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1040755582] [2020-10-27 14:54:09,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:54:09,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 14:54:09,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828338873] [2020-10-27 14:54:09,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 14:54:09,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:54:09,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 14:54:09,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 14:54:09,327 INFO L87 Difference]: Start difference. First operand 216 states and 267 transitions. Second operand 28 states. [2020-10-27 14:54:10,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:54:10,134 INFO L93 Difference]: Finished difference Result 390 states and 498 transitions. [2020-10-27 14:54:10,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 14:54:10,135 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 211 [2020-10-27 14:54:10,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:54:10,137 INFO L225 Difference]: With dead ends: 390 [2020-10-27 14:54:10,137 INFO L226 Difference]: Without dead ends: 229 [2020-10-27 14:54:10,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 14:54:10,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-10-27 14:54:10,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 224. [2020-10-27 14:54:10,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-10-27 14:54:10,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 277 transitions. [2020-10-27 14:54:10,148 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 277 transitions. Word has length 211 [2020-10-27 14:54:10,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:54:10,148 INFO L481 AbstractCegarLoop]: Abstraction has 224 states and 277 transitions. [2020-10-27 14:54:10,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 14:54:10,148 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 277 transitions. [2020-10-27 14:54:10,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-10-27 14:54:10,150 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:54:10,150 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:54:10,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 14:54:10,150 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:54:10,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:54:10,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1304177259, now seen corresponding path program 25 times [2020-10-27 14:54:10,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:54:10,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1597603278] [2020-10-27 14:54:10,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:54:10,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:10,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:10,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:15,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:15,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 229 [2020-10-27 14:54:15,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:54:15,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5059 [2020-10-27 14:54:15,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:15,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 14:54:15,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-27 14:54:15,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-27 14:54:15,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:15,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:54:15,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:15,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:15,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:15,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:54:15,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:54:15,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:54:15,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:15,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:54:15,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:54:15,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:54:15,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:15,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2475 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 1550 trivial. 0 not checked. [2020-10-27 14:54:15,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1597603278] [2020-10-27 14:54:15,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:54:15,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 14:54:15,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386553884] [2020-10-27 14:54:15,960 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 14:54:15,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:54:15,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 14:54:15,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:54:15,962 INFO L87 Difference]: Start difference. First operand 224 states and 277 transitions. Second operand 29 states. [2020-10-27 14:54:16,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:54:16,752 INFO L93 Difference]: Finished difference Result 404 states and 516 transitions. [2020-10-27 14:54:16,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 14:54:16,753 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 219 [2020-10-27 14:54:16,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:54:16,754 INFO L225 Difference]: With dead ends: 404 [2020-10-27 14:54:16,755 INFO L226 Difference]: Without dead ends: 237 [2020-10-27 14:54:16,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:54:16,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-27 14:54:16,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 232. [2020-10-27 14:54:16,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-10-27 14:54:16,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 287 transitions. [2020-10-27 14:54:16,766 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 287 transitions. Word has length 219 [2020-10-27 14:54:16,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:54:16,767 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 287 transitions. [2020-10-27 14:54:16,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 14:54:16,767 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 287 transitions. [2020-10-27 14:54:16,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-10-27 14:54:16,769 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:54:16,769 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:54:16,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 14:54:16,770 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:54:16,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:54:16,770 INFO L82 PathProgramCache]: Analyzing trace with hash 112388364, now seen corresponding path program 26 times [2020-10-27 14:54:16,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:54:16,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1238082477] [2020-10-27 14:54:16,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:54:16,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:16,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:16,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:22,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:22,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 237 [2020-10-27 14:54:22,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:54:22,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5285 [2020-10-27 14:54:22,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:22,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 14:54:22,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 65 [2020-10-27 14:54:22,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-27 14:54:22,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:22,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:54:22,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:22,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:22,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:22,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:54:22,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:54:22,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:54:22,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:22,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:54:22,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:54:22,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:54:22,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:22,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2678 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 1677 trivial. 0 not checked. [2020-10-27 14:54:22,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1238082477] [2020-10-27 14:54:22,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:54:22,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 14:54:22,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914461257] [2020-10-27 14:54:22,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 14:54:22,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:54:22,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 14:54:22,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 14:54:22,861 INFO L87 Difference]: Start difference. First operand 232 states and 287 transitions. Second operand 30 states. [2020-10-27 14:54:23,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:54:23,741 INFO L93 Difference]: Finished difference Result 418 states and 534 transitions. [2020-10-27 14:54:23,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 14:54:23,742 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 227 [2020-10-27 14:54:23,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:54:23,744 INFO L225 Difference]: With dead ends: 418 [2020-10-27 14:54:23,744 INFO L226 Difference]: Without dead ends: 245 [2020-10-27 14:54:23,745 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 14:54:23,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-10-27 14:54:23,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 240. [2020-10-27 14:54:23,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-10-27 14:54:23,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 297 transitions. [2020-10-27 14:54:23,755 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 297 transitions. Word has length 227 [2020-10-27 14:54:23,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:54:23,755 INFO L481 AbstractCegarLoop]: Abstraction has 240 states and 297 transitions. [2020-10-27 14:54:23,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 14:54:23,755 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 297 transitions. [2020-10-27 14:54:23,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2020-10-27 14:54:23,757 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:54:23,757 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:54:23,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 14:54:23,757 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:54:23,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:54:23,758 INFO L82 PathProgramCache]: Analyzing trace with hash -721854863, now seen corresponding path program 27 times [2020-10-27 14:54:23,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:54:23,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [915912025] [2020-10-27 14:54:23,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:54:23,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:23,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:24,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:29,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:29,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 245 [2020-10-27 14:54:29,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:54:29,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6091 [2020-10-27 14:54:29,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:29,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 14:54:29,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-27 14:54:29,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-27 14:54:29,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:30,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:54:30,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:30,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:30,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:30,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:54:30,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:54:30,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:54:30,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:30,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:54:30,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:54:30,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:54:30,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:30,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2889 backedges. 0 proven. 1080 refuted. 0 times theorem prover too weak. 1809 trivial. 0 not checked. [2020-10-27 14:54:30,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [915912025] [2020-10-27 14:54:30,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:54:30,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 14:54:30,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14190604] [2020-10-27 14:54:30,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 14:54:30,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:54:30,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 14:54:30,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 14:54:30,701 INFO L87 Difference]: Start difference. First operand 240 states and 297 transitions. Second operand 31 states. [2020-10-27 14:54:31,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:54:31,467 INFO L93 Difference]: Finished difference Result 432 states and 552 transitions. [2020-10-27 14:54:31,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 14:54:31,467 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 235 [2020-10-27 14:54:31,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:54:31,469 INFO L225 Difference]: With dead ends: 432 [2020-10-27 14:54:31,470 INFO L226 Difference]: Without dead ends: 253 [2020-10-27 14:54:31,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 14:54:31,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-10-27 14:54:31,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 248. [2020-10-27 14:54:31,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2020-10-27 14:54:31,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 307 transitions. [2020-10-27 14:54:31,481 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 307 transitions. Word has length 235 [2020-10-27 14:54:31,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:54:31,482 INFO L481 AbstractCegarLoop]: Abstraction has 248 states and 307 transitions. [2020-10-27 14:54:31,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 14:54:31,482 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 307 transitions. [2020-10-27 14:54:31,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2020-10-27 14:54:31,483 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:54:31,484 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:54:31,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 14:54:31,484 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:54:31,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:54:31,485 INFO L82 PathProgramCache]: Analyzing trace with hash -2131121624, now seen corresponding path program 28 times [2020-10-27 14:54:31,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:54:31,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [32336889] [2020-10-27 14:54:31,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:54:31,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:31,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:31,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:36,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:36,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 253 [2020-10-27 14:54:36,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:54:36,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5150 [2020-10-27 14:54:36,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:36,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 14:54:36,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-27 14:54:36,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-27 14:54:36,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:37,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:54:37,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:37,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:37,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:37,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:54:37,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:54:37,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:54:37,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:37,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:54:37,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:54:37,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:54:37,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:37,537 INFO L134 CoverageAnalysis]: Checked inductivity of 3108 backedges. 0 proven. 1162 refuted. 0 times theorem prover too weak. 1946 trivial. 0 not checked. [2020-10-27 14:54:37,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [32336889] [2020-10-27 14:54:37,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:54:37,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 14:54:37,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023383606] [2020-10-27 14:54:37,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 14:54:37,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:54:37,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 14:54:37,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 14:54:37,539 INFO L87 Difference]: Start difference. First operand 248 states and 307 transitions. Second operand 32 states. [2020-10-27 14:54:38,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:54:38,405 INFO L93 Difference]: Finished difference Result 446 states and 570 transitions. [2020-10-27 14:54:38,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 14:54:38,405 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 243 [2020-10-27 14:54:38,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:54:38,407 INFO L225 Difference]: With dead ends: 446 [2020-10-27 14:54:38,407 INFO L226 Difference]: Without dead ends: 261 [2020-10-27 14:54:38,409 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 14:54:38,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-10-27 14:54:38,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 256. [2020-10-27 14:54:38,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-10-27 14:54:38,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 317 transitions. [2020-10-27 14:54:38,419 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 317 transitions. Word has length 243 [2020-10-27 14:54:38,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:54:38,419 INFO L481 AbstractCegarLoop]: Abstraction has 256 states and 317 transitions. [2020-10-27 14:54:38,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 14:54:38,419 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 317 transitions. [2020-10-27 14:54:38,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2020-10-27 14:54:38,421 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:54:38,422 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:54:38,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 14:54:38,422 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:54:38,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:54:38,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1155723955, now seen corresponding path program 29 times [2020-10-27 14:54:38,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:54:38,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1001647207] [2020-10-27 14:54:38,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:54:38,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:38,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:38,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:43,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:43,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 261 [2020-10-27 14:54:43,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:54:43,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5115 [2020-10-27 14:54:43,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:43,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 14:54:43,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-27 14:54:43,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-27 14:54:43,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:44,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:54:44,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:44,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:44,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:44,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:54:44,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:54:44,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:54:44,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:44,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:54:44,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:54:44,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:54:44,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:44,449 INFO L134 CoverageAnalysis]: Checked inductivity of 3335 backedges. 0 proven. 1247 refuted. 0 times theorem prover too weak. 2088 trivial. 0 not checked. [2020-10-27 14:54:44,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1001647207] [2020-10-27 14:54:44,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:54:44,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 14:54:44,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456094376] [2020-10-27 14:54:44,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 14:54:44,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:54:44,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 14:54:44,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 14:54:44,451 INFO L87 Difference]: Start difference. First operand 256 states and 317 transitions. Second operand 33 states. [2020-10-27 14:54:45,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:54:45,505 INFO L93 Difference]: Finished difference Result 460 states and 588 transitions. [2020-10-27 14:54:45,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 14:54:45,506 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 251 [2020-10-27 14:54:45,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:54:45,508 INFO L225 Difference]: With dead ends: 460 [2020-10-27 14:54:45,509 INFO L226 Difference]: Without dead ends: 269 [2020-10-27 14:54:45,510 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 14:54:45,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-27 14:54:45,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 264. [2020-10-27 14:54:45,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-10-27 14:54:45,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 327 transitions. [2020-10-27 14:54:45,520 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 327 transitions. Word has length 251 [2020-10-27 14:54:45,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:54:45,520 INFO L481 AbstractCegarLoop]: Abstraction has 264 states and 327 transitions. [2020-10-27 14:54:45,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 14:54:45,521 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 327 transitions. [2020-10-27 14:54:45,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2020-10-27 14:54:45,522 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:54:45,523 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:54:45,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 14:54:45,523 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:54:45,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:54:45,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1652154044, now seen corresponding path program 30 times [2020-10-27 14:54:45,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:54:45,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [469521013] [2020-10-27 14:54:45,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:54:45,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:45,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:45,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:50,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:50,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 269 [2020-10-27 14:54:50,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:54:50,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5335 [2020-10-27 14:54:50,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:50,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 14:54:50,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-27 14:54:50,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-27 14:54:50,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:51,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:54:51,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:51,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:51,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:51,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:54:51,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:54:51,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:54:51,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:51,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:54:51,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:54:51,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:54:51,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:51,801 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 2235 trivial. 0 not checked. [2020-10-27 14:54:51,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [469521013] [2020-10-27 14:54:51,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:54:51,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-27 14:54:51,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742238510] [2020-10-27 14:54:51,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-27 14:54:51,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:54:51,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-27 14:54:51,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 14:54:51,803 INFO L87 Difference]: Start difference. First operand 264 states and 327 transitions. Second operand 34 states. [2020-10-27 14:54:52,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:54:52,880 INFO L93 Difference]: Finished difference Result 474 states and 606 transitions. [2020-10-27 14:54:52,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 14:54:52,881 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 259 [2020-10-27 14:54:52,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:54:52,883 INFO L225 Difference]: With dead ends: 474 [2020-10-27 14:54:52,883 INFO L226 Difference]: Without dead ends: 277 [2020-10-27 14:54:52,888 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 14:54:52,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-10-27 14:54:52,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 272. [2020-10-27 14:54:52,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-10-27 14:54:52,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 337 transitions. [2020-10-27 14:54:52,902 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 337 transitions. Word has length 259 [2020-10-27 14:54:52,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:54:52,902 INFO L481 AbstractCegarLoop]: Abstraction has 272 states and 337 transitions. [2020-10-27 14:54:52,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-27 14:54:52,903 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 337 transitions. [2020-10-27 14:54:52,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2020-10-27 14:54:52,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:54:52,905 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:54:52,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 14:54:52,905 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:54:52,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:54:52,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1963975209, now seen corresponding path program 31 times [2020-10-27 14:54:52,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:54:52,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1182896326] [2020-10-27 14:54:52,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:54:52,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:53,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:53,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:58,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:58,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 277 [2020-10-27 14:54:58,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:54:58,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5706 [2020-10-27 14:54:58,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:58,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-27 14:54:58,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-27 14:54:58,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-27 14:54:58,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:59,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:54:59,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:59,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:59,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:59,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:54:59,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:54:59,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:54:59,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:59,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:54:59,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:54:59,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:54:59,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:59,610 INFO L134 CoverageAnalysis]: Checked inductivity of 3813 backedges. 0 proven. 1426 refuted. 0 times theorem prover too weak. 2387 trivial. 0 not checked. [2020-10-27 14:54:59,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1182896326] [2020-10-27 14:54:59,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:54:59,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-27 14:54:59,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188774142] [2020-10-27 14:54:59,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-27 14:54:59,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:54:59,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-27 14:54:59,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 14:54:59,613 INFO L87 Difference]: Start difference. First operand 272 states and 337 transitions. Second operand 35 states. [2020-10-27 14:55:00,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:55:00,734 INFO L93 Difference]: Finished difference Result 488 states and 624 transitions. [2020-10-27 14:55:00,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 14:55:00,735 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 267 [2020-10-27 14:55:00,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:55:00,738 INFO L225 Difference]: With dead ends: 488 [2020-10-27 14:55:00,738 INFO L226 Difference]: Without dead ends: 285 [2020-10-27 14:55:00,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 14:55:00,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-10-27 14:55:00,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 280. [2020-10-27 14:55:00,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-10-27 14:55:00,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 347 transitions. [2020-10-27 14:55:00,756 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 347 transitions. Word has length 267 [2020-10-27 14:55:00,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:55:00,757 INFO L481 AbstractCegarLoop]: Abstraction has 280 states and 347 transitions. [2020-10-27 14:55:00,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-27 14:55:00,757 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 347 transitions. [2020-10-27 14:55:00,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2020-10-27 14:55:00,759 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:55:00,759 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:55:00,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 14:55:00,759 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:55:00,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:55:00,760 INFO L82 PathProgramCache]: Analyzing trace with hash -189968800, now seen corresponding path program 32 times [2020-10-27 14:55:00,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:55:00,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [32893551] [2020-10-27 14:55:00,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:55:00,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:55:00,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:00,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:06,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:55:06,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 285 [2020-10-27 14:55:06,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:55:06,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5500 [2020-10-27 14:55:06,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:55:06,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-27 14:55:06,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 77 [2020-10-27 14:55:06,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-27 14:55:06,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:55:07,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:55:07,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:55:07,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:07,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:55:07,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:55:07,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:55:07,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:55:07,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:55:07,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:55:07,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:55:07,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:55:07,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:55:07,308 INFO L134 CoverageAnalysis]: Checked inductivity of 4064 backedges. 0 proven. 1520 refuted. 0 times theorem prover too weak. 2544 trivial. 0 not checked. [2020-10-27 14:55:07,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [32893551] [2020-10-27 14:55:07,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:55:07,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-27 14:55:07,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477500613] [2020-10-27 14:55:07,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-27 14:55:07,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:55:07,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-27 14:55:07,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 14:55:07,311 INFO L87 Difference]: Start difference. First operand 280 states and 347 transitions. Second operand 36 states. [2020-10-27 14:55:08,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:55:08,480 INFO L93 Difference]: Finished difference Result 502 states and 642 transitions. [2020-10-27 14:55:08,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 14:55:08,481 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 275 [2020-10-27 14:55:08,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:55:08,483 INFO L225 Difference]: With dead ends: 502 [2020-10-27 14:55:08,484 INFO L226 Difference]: Without dead ends: 293 [2020-10-27 14:55:08,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 14:55:08,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2020-10-27 14:55:08,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 288. [2020-10-27 14:55:08,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2020-10-27 14:55:08,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 357 transitions. [2020-10-27 14:55:08,494 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 357 transitions. Word has length 275 [2020-10-27 14:55:08,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:55:08,494 INFO L481 AbstractCegarLoop]: Abstraction has 288 states and 357 transitions. [2020-10-27 14:55:08,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-27 14:55:08,494 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 357 transitions. [2020-10-27 14:55:08,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2020-10-27 14:55:08,496 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:55:08,496 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:55:08,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 14:55:08,496 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:55:08,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:55:08,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1506616059, now seen corresponding path program 33 times [2020-10-27 14:55:08,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:55:08,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1520194794] [2020-10-27 14:55:08,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:55:08,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:55:08,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:08,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:14,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:55:14,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 293 [2020-10-27 14:55:14,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:55:14,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5900 [2020-10-27 14:55:14,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:55:14,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-27 14:55:14,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-10-27 14:55:14,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-27 14:55:14,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:55:15,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:55:15,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:55:15,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:15,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:55:15,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:55:15,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:55:15,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:55:15,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:55:15,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:55:15,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:55:15,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:55:15,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:55:15,545 INFO L134 CoverageAnalysis]: Checked inductivity of 4323 backedges. 0 proven. 1617 refuted. 0 times theorem prover too weak. 2706 trivial. 0 not checked. [2020-10-27 14:55:15,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1520194794] [2020-10-27 14:55:15,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:55:15,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-27 14:55:15,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954316216] [2020-10-27 14:55:15,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-27 14:55:15,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:55:15,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-27 14:55:15,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 14:55:15,547 INFO L87 Difference]: Start difference. First operand 288 states and 357 transitions. Second operand 37 states. [2020-10-27 14:55:16,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:55:16,553 INFO L93 Difference]: Finished difference Result 516 states and 660 transitions. [2020-10-27 14:55:16,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 14:55:16,553 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 283 [2020-10-27 14:55:16,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:55:16,555 INFO L225 Difference]: With dead ends: 516 [2020-10-27 14:55:16,555 INFO L226 Difference]: Without dead ends: 301 [2020-10-27 14:55:16,557 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 14:55:16,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2020-10-27 14:55:16,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 296. [2020-10-27 14:55:16,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2020-10-27 14:55:16,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 367 transitions. [2020-10-27 14:55:16,565 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 367 transitions. Word has length 283 [2020-10-27 14:55:16,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:55:16,565 INFO L481 AbstractCegarLoop]: Abstraction has 296 states and 367 transitions. [2020-10-27 14:55:16,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-27 14:55:16,566 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 367 transitions. [2020-10-27 14:55:16,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2020-10-27 14:55:16,567 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:55:16,568 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:55:16,568 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 14:55:16,568 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:55:16,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:55:16,568 INFO L82 PathProgramCache]: Analyzing trace with hash 449065340, now seen corresponding path program 34 times [2020-10-27 14:55:16,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:55:16,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [707504701] [2020-10-27 14:55:16,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:55:16,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:55:16,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:16,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:22,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:55:22,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 301 [2020-10-27 14:55:22,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:55:22,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6307 [2020-10-27 14:55:22,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:55:22,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-27 14:55:22,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-27 14:55:22,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-27 14:55:22,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:55:24,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:55:24,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:55:24,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:24,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:55:24,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:55:24,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:55:24,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:55:24,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:55:24,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:55:24,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:55:24,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:55:24,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:55:24,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4590 backedges. 0 proven. 1717 refuted. 0 times theorem prover too weak. 2873 trivial. 0 not checked. [2020-10-27 14:55:24,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [707504701] [2020-10-27 14:55:24,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:55:24,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-27 14:55:24,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251354152] [2020-10-27 14:55:24,069 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-27 14:55:24,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:55:24,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-27 14:55:24,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 14:55:24,071 INFO L87 Difference]: Start difference. First operand 296 states and 367 transitions. Second operand 38 states. [2020-10-27 14:55:25,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:55:25,172 INFO L93 Difference]: Finished difference Result 530 states and 678 transitions. [2020-10-27 14:55:25,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-27 14:55:25,173 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 291 [2020-10-27 14:55:25,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:55:25,175 INFO L225 Difference]: With dead ends: 530 [2020-10-27 14:55:25,175 INFO L226 Difference]: Without dead ends: 309 [2020-10-27 14:55:25,177 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 14:55:25,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2020-10-27 14:55:25,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 304. [2020-10-27 14:55:25,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-10-27 14:55:25,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 377 transitions. [2020-10-27 14:55:25,186 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 377 transitions. Word has length 291 [2020-10-27 14:55:25,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:55:25,186 INFO L481 AbstractCegarLoop]: Abstraction has 304 states and 377 transitions. [2020-10-27 14:55:25,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-27 14:55:25,187 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 377 transitions. [2020-10-27 14:55:25,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2020-10-27 14:55:25,188 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:55:25,189 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:55:25,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 14:55:25,189 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:55:25,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:55:25,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1528365599, now seen corresponding path program 35 times [2020-10-27 14:55:25,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:55:25,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1973137353] [2020-10-27 14:55:25,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:55:25,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:55:25,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:25,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:30,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:55:30,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 309 [2020-10-27 14:55:30,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:55:30,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5088 [2020-10-27 14:55:30,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:55:30,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-27 14:55:30,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 83 [2020-10-27 14:55:30,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-27 14:55:30,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:55:31,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:55:31,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:55:31,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:31,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:55:31,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:55:31,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:55:31,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:55:31,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:55:31,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:55:31,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:55:31,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:55:31,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:55:31,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4865 backedges. 0 proven. 1820 refuted. 0 times theorem prover too weak. 3045 trivial. 0 not checked. [2020-10-27 14:55:31,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1973137353] [2020-10-27 14:55:31,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:55:31,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-27 14:55:31,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209355456] [2020-10-27 14:55:31,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-27 14:55:31,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:55:31,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-27 14:55:31,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 14:55:31,514 INFO L87 Difference]: Start difference. First operand 304 states and 377 transitions. Second operand 39 states. [2020-10-27 14:55:32,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:55:32,780 INFO L93 Difference]: Finished difference Result 544 states and 696 transitions. [2020-10-27 14:55:32,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-27 14:55:32,781 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 299 [2020-10-27 14:55:32,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:55:32,783 INFO L225 Difference]: With dead ends: 544 [2020-10-27 14:55:32,784 INFO L226 Difference]: Without dead ends: 317 [2020-10-27 14:55:32,786 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 14:55:32,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2020-10-27 14:55:32,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 312. [2020-10-27 14:55:32,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2020-10-27 14:55:32,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 387 transitions. [2020-10-27 14:55:32,795 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 387 transitions. Word has length 299 [2020-10-27 14:55:32,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:55:32,795 INFO L481 AbstractCegarLoop]: Abstraction has 312 states and 387 transitions. [2020-10-27 14:55:32,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-27 14:55:32,796 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 387 transitions. [2020-10-27 14:55:32,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2020-10-27 14:55:32,797 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:55:32,798 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:55:32,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 14:55:32,798 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:55:32,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:55:32,798 INFO L82 PathProgramCache]: Analyzing trace with hash 2083480, now seen corresponding path program 36 times [2020-10-27 14:55:32,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:55:32,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [120180656] [2020-10-27 14:55:32,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:55:32,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:55:32,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:33,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking...