/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=SHALLOWEST --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-cav19/array_init_both_ends_multiple_sum.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 18:58:27,149 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 18:58:27,152 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 18:58:27,189 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 18:58:27,190 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 18:58:27,191 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 18:58:27,193 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 18:58:27,196 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 18:58:27,198 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 18:58:27,199 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 18:58:27,201 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 18:58:27,202 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 18:58:27,203 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 18:58:27,204 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 18:58:27,205 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 18:58:27,207 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 18:58:27,208 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 18:58:27,209 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 18:58:27,211 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 18:58:27,214 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 18:58:27,216 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 18:58:27,219 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 18:58:27,221 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 18:58:27,222 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 18:58:27,226 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 18:58:27,226 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 18:58:27,226 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 18:58:27,228 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 18:58:27,228 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 18:58:27,229 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 18:58:27,230 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 18:58:27,231 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 18:58:27,232 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 18:58:27,233 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 18:58:27,234 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 18:58:27,235 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 18:58:27,236 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 18:58:27,236 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 18:58:27,237 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 18:58:27,238 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 18:58:27,239 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 18:58:27,240 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 [2020-10-26 18:58:27,271 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 18:58:27,272 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 18:58:27,273 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 18:58:27,274 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 18:58:27,274 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 18:58:27,274 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 18:58:27,274 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 18:58:27,275 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 18:58:27,275 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 18:58:27,275 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 18:58:27,275 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 18:58:27,276 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 18:58:27,276 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 18:58:27,276 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 18:58:27,277 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 18:58:27,277 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 18:58:27,277 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 18:58:27,277 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 18:58:27,278 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 18:58:27,278 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 18:58:27,278 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 18:58:27,278 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 18:58:27,279 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 18:58:27,279 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 18:58:27,279 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 18:58:27,279 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 18:58:27,279 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 18:58:27,280 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 18:58:27,280 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 18:58:27,280 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 18:58:27,713 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 18:58:27,744 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 18:58:27,747 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 18:58:27,749 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 18:58:27,750 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 18:58:27,751 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-cav19/array_init_both_ends_multiple_sum.c [2020-10-26 18:58:27,844 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b49922bbb/d8fd84ea315e467fb0eba6da34666c64/FLAG06b2fadbd [2020-10-26 18:58:28,576 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 18:58:28,576 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-cav19/array_init_both_ends_multiple_sum.c [2020-10-26 18:58:28,584 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b49922bbb/d8fd84ea315e467fb0eba6da34666c64/FLAG06b2fadbd [2020-10-26 18:58:28,937 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b49922bbb/d8fd84ea315e467fb0eba6da34666c64 [2020-10-26 18:58:28,942 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 18:58:28,949 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 18:58:28,951 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 18:58:28,951 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 18:58:28,955 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 18:58:28,956 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 06:58:28" (1/1) ... [2020-10-26 18:58:28,959 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4118f9b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 06:58:28, skipping insertion in model container [2020-10-26 18:58:28,960 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 06:58:28" (1/1) ... [2020-10-26 18:58:28,968 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 18:58:28,982 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 18:58:29,167 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 18:58:29,177 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 18:58:29,200 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 18:58:29,218 INFO L208 MainTranslator]: Completed translation [2020-10-26 18:58:29,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 06:58:29 WrapperNode [2020-10-26 18:58:29,218 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 18:58:29,220 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 18:58:29,220 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 18:58:29,220 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 18:58:29,237 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 06:58:29" (1/1) ... [2020-10-26 18:58:29,238 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 06:58:29" (1/1) ... [2020-10-26 18:58:29,247 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 06:58:29" (1/1) ... [2020-10-26 18:58:29,248 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 06:58:29" (1/1) ... [2020-10-26 18:58:29,256 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 06:58:29" (1/1) ... [2020-10-26 18:58:29,262 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 06:58:29" (1/1) ... [2020-10-26 18:58:29,264 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 06:58:29" (1/1) ... [2020-10-26 18:58:29,266 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 18:58:29,268 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 18:58:29,268 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 18:58:29,268 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 18:58:29,269 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 06:58:29" (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 [2020-10-26 18:58:29,392 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 18:58:29,393 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 18:58:29,393 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 18:58:29,393 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-26 18:58:29,393 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 18:58:29,394 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 18:58:29,394 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 18:58:29,394 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 18:58:29,394 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 18:58:29,395 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 18:58:29,395 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-26 18:58:29,395 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 18:58:29,395 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 18:58:29,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 18:58:29,396 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 18:58:29,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 18:58:29,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 18:58:29,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 18:58:29,397 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 18:58:29,859 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 18:58:29,859 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-26 18:58:29,861 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 06:58:29 BoogieIcfgContainer [2020-10-26 18:58:29,862 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 18:58:29,864 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 18:58:29,864 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 18:58:29,868 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 18:58:29,868 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 06:58:28" (1/3) ... [2020-10-26 18:58:29,869 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a485cbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 06:58:29, skipping insertion in model container [2020-10-26 18:58:29,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 06:58:29" (2/3) ... [2020-10-26 18:58:29,870 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a485cbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 06:58:29, skipping insertion in model container [2020-10-26 18:58:29,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 06:58:29" (3/3) ... [2020-10-26 18:58:29,872 INFO L111 eAbstractionObserver]: Analyzing ICFG array_init_both_ends_multiple_sum.c [2020-10-26 18:58:29,885 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 18:58:29,891 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 18:58:29,909 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 18:58:29,961 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 18:58:29,961 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 18:58:29,962 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 18:58:29,962 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 18:58:29,962 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 18:58:29,962 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 18:58:29,962 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 18:58:29,963 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 18:58:29,987 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-10-26 18:58:29,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-26 18:58:29,999 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:58:30,000 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:58:30,001 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:58:30,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:58:30,012 INFO L82 PathProgramCache]: Analyzing trace with hash 661726964, now seen corresponding path program 1 times [2020-10-26 18:58:30,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:58:30,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1734068755] [2020-10-26 18:58:30,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:58:30,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:30,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:30,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:30,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:30,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:30,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:30,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-26 18:58:30,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 18:58:30,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 668 [2020-10-26 18:58:30,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:30,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 18:58:30,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 18:58:30,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 18:58:30,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 18:58:31,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:58:31,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:31,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:31,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:31,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:58:31,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:31,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-26 18:58:31,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:31,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 18:58:31,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:58:31,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 18:58:31,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:31,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 18:58:31,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1734068755] [2020-10-26 18:58:31,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 18:58:31,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 18:58:31,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370488820] [2020-10-26 18:58:31,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 18:58:31,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:58:31,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 18:58:31,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 18:58:31,191 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 5 states. [2020-10-26 18:58:31,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:58:31,475 INFO L93 Difference]: Finished difference Result 55 states and 73 transitions. [2020-10-26 18:58:31,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 18:58:31,478 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-26 18:58:31,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:58:31,487 INFO L225 Difference]: With dead ends: 55 [2020-10-26 18:58:31,487 INFO L226 Difference]: Without dead ends: 26 [2020-10-26 18:58:31,491 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 18:58:31,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-26 18:58:31,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2020-10-26 18:58:31,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-26 18:58:31,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-10-26 18:58:31,538 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 16 [2020-10-26 18:58:31,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:58:31,538 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-10-26 18:58:31,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 18:58:31,539 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-10-26 18:58:31,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-26 18:58:31,540 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:58:31,540 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] [2020-10-26 18:58:31,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 18:58:31,541 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:58:31,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:58:31,541 INFO L82 PathProgramCache]: Analyzing trace with hash 66704614, now seen corresponding path program 1 times [2020-10-26 18:58:31,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:58:31,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1808093748] [2020-10-26 18:58:31,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:58:31,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:31,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:31,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:31,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:31,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:32,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:32,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:33,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:33,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:33,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:35,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:35,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-26 18:58:35,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-26 18:58:35,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3616 [2020-10-26 18:58:35,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:35,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 18:58:35,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 18:58:35,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 18:58:35,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-26 18:58:35,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:58:35,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:35,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:35,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:35,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:58:35,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:35,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-26 18:58:35,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:35,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 18:58:35,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:58:35,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 18:58:35,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-26 18:58:35,365 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 18:58:35,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1808093748] [2020-10-26 18:58:35,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:58:35,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 18:58:35,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117376748] [2020-10-26 18:58:35,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 18:58:35,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:58:35,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 18:58:35,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-26 18:58:35,382 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 6 states. [2020-10-26 18:58:35,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:58:35,787 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2020-10-26 18:58:35,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 18:58:35,788 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-26 18:58:35,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:58:35,789 INFO L225 Difference]: With dead ends: 46 [2020-10-26 18:58:35,789 INFO L226 Difference]: Without dead ends: 32 [2020-10-26 18:58:35,791 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-26 18:58:35,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-26 18:58:35,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2020-10-26 18:58:35,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-26 18:58:35,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-26 18:58:35,809 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 22 [2020-10-26 18:58:35,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:58:35,809 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-26 18:58:35,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 18:58:35,810 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-26 18:58:35,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-26 18:58:35,811 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:58:35,811 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:58:35,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 18:58:35,812 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:58:35,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:58:35,812 INFO L82 PathProgramCache]: Analyzing trace with hash -405168308, now seen corresponding path program 2 times [2020-10-26 18:58:35,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:58:35,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1027245153] [2020-10-26 18:58:35,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:58:35,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:35,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:35,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:35,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:36,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:37,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:37,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:37,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:38,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:39,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:39,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:39,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:40,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:40,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:40,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:40,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:40,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-26 18:58:40,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-26 18:58:40,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-26 18:58:40,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:40,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 18:58:40,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 18:58:40,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 18:58:40,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-26 18:58:41,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:58:41,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:41,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:41,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:41,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:58:41,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:41,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 18:58:41,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:41,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 18:58:41,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:58:41,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 18:58:41,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 18:58:41,044 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-26 18:58:41,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1027245153] [2020-10-26 18:58:41,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:58:41,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 18:58:41,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396967102] [2020-10-26 18:58:41,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 18:58:41,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:58:41,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 18:58:41,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 18:58:41,050 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 7 states. [2020-10-26 18:58:41,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:58:41,485 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2020-10-26 18:58:41,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 18:58:41,487 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-10-26 18:58:41,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:58:41,488 INFO L225 Difference]: With dead ends: 56 [2020-10-26 18:58:41,488 INFO L226 Difference]: Without dead ends: 38 [2020-10-26 18:58:41,490 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-26 18:58:41,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-26 18:58:41,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2020-10-26 18:58:41,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-26 18:58:41,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-10-26 18:58:41,513 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 28 [2020-10-26 18:58:41,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:58:41,514 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-10-26 18:58:41,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 18:58:41,515 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-10-26 18:58:41,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-26 18:58:41,518 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:58:41,519 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:58:41,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 18:58:41,519 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:58:41,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:58:41,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1809201870, now seen corresponding path program 3 times [2020-10-26 18:58:41,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:58:41,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1721113866] [2020-10-26 18:58:41,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:58:41,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:41,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:41,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:41,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:42,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:42,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:43,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:43,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:44,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:44,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:45,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:45,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:46,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:46,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:46,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-26 18:58:46,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-26 18:58:46,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-26 18:58:46,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:46,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 18:58:46,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 18:58:46,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 18:58:46,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 18:58:46,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:58:46,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:46,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:46,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:46,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:58:46,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:46,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-26 18:58:46,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:46,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 18:58:46,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:58:46,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 18:58:46,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:46,752 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-26 18:58:46,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1721113866] [2020-10-26 18:58:46,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:58:46,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 18:58:46,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042389072] [2020-10-26 18:58:46,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 18:58:46,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:58:46,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 18:58:46,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-26 18:58:46,758 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 8 states. [2020-10-26 18:58:47,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:58:47,229 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2020-10-26 18:58:47,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 18:58:47,230 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2020-10-26 18:58:47,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:58:47,231 INFO L225 Difference]: With dead ends: 66 [2020-10-26 18:58:47,231 INFO L226 Difference]: Without dead ends: 44 [2020-10-26 18:58:47,233 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-26 18:58:47,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-26 18:58:47,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2020-10-26 18:58:47,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-26 18:58:47,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-10-26 18:58:47,249 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 34 [2020-10-26 18:58:47,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:58:47,250 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-10-26 18:58:47,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 18:58:47,250 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-10-26 18:58:47,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-26 18:58:47,255 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:58:47,256 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:58:47,256 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 18:58:47,256 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:58:47,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:58:47,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1711298920, now seen corresponding path program 4 times [2020-10-26 18:58:47,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:58:47,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1784586852] [2020-10-26 18:58:47,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:58:47,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:47,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:47,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:47,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:52,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:52,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-26 18:58:52,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 18:58:52,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 18:58:52,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:52,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 18:58:52,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 18:58:52,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 18:58:52,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:52,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:58:52,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:52,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:52,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:52,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:58:52,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:52,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 18:58:52,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:52,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 18:58:52,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:58:52,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 18:58:52,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:52,492 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-26 18:58:52,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1784586852] [2020-10-26 18:58:52,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:58:52,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 18:58:52,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071869221] [2020-10-26 18:58:52,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 18:58:52,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:58:52,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 18:58:52,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-10-26 18:58:52,495 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 9 states. [2020-10-26 18:58:52,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:58:52,949 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2020-10-26 18:58:52,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 18:58:52,950 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 40 [2020-10-26 18:58:52,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:58:52,951 INFO L225 Difference]: With dead ends: 76 [2020-10-26 18:58:52,951 INFO L226 Difference]: Without dead ends: 50 [2020-10-26 18:58:52,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-10-26 18:58:52,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-26 18:58:52,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-10-26 18:58:52,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-26 18:58:52,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2020-10-26 18:58:52,968 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 40 [2020-10-26 18:58:52,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:58:52,969 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2020-10-26 18:58:52,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 18:58:52,969 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2020-10-26 18:58:52,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-26 18:58:52,971 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:58:52,971 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:58:52,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 18:58:52,972 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:58:52,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:58:52,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1494703234, now seen corresponding path program 5 times [2020-10-26 18:58:52,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:58:52,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1198792558] [2020-10-26 18:58:52,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:58:53,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:53,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:53,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:53,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:58,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:58,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-26 18:58:58,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 18:58:58,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-26 18:58:58,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:58,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 18:58:58,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 18:58:58,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 18:58:58,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:58,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:58:58,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:58,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:58,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:58,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:58:58,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:58,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 18:58:58,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:58,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 18:58:58,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:58:58,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 18:58:58,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:58,228 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-10-26 18:58:58,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1198792558] [2020-10-26 18:58:58,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:58:58,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 18:58:58,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803790572] [2020-10-26 18:58:58,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 18:58:58,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:58:58,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 18:58:58,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-26 18:58:58,231 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 10 states. [2020-10-26 18:58:58,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:58:58,757 INFO L93 Difference]: Finished difference Result 86 states and 92 transitions. [2020-10-26 18:58:58,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 18:58:58,758 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 46 [2020-10-26 18:58:58,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:58:58,759 INFO L225 Difference]: With dead ends: 86 [2020-10-26 18:58:58,759 INFO L226 Difference]: Without dead ends: 56 [2020-10-26 18:58:58,760 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2020-10-26 18:58:58,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-26 18:58:58,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2020-10-26 18:58:58,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-26 18:58:58,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2020-10-26 18:58:58,768 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 46 [2020-10-26 18:58:58,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:58:58,769 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2020-10-26 18:58:58,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 18:58:58,769 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2020-10-26 18:58:58,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-26 18:58:58,770 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:58:58,770 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:58:58,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 18:58:58,770 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:58:58,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:58:58,771 INFO L82 PathProgramCache]: Analyzing trace with hash -890627100, now seen corresponding path program 6 times [2020-10-26 18:58:58,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:58:58,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1245105134] [2020-10-26 18:58:58,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:58:58,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:58,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:58,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:59,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:03,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:03,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-26 18:59:03,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 18:59:03,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 18:59:03,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:03,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 18:59:03,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 18:59:03,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 18:59:03,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:04,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:59:04,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:04,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:04,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:04,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:59:04,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:04,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 18:59:04,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:04,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 18:59:04,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:04,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 18:59:04,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:04,171 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-26 18:59:04,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1245105134] [2020-10-26 18:59:04,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:59:04,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 18:59:04,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625369122] [2020-10-26 18:59:04,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 18:59:04,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:59:04,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 18:59:04,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-26 18:59:04,174 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 11 states. [2020-10-26 18:59:04,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:59:04,819 INFO L93 Difference]: Finished difference Result 96 states and 102 transitions. [2020-10-26 18:59:04,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 18:59:04,820 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 52 [2020-10-26 18:59:04,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:59:04,821 INFO L225 Difference]: With dead ends: 96 [2020-10-26 18:59:04,821 INFO L226 Difference]: Without dead ends: 62 [2020-10-26 18:59:04,822 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2020-10-26 18:59:04,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-26 18:59:04,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2020-10-26 18:59:04,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-26 18:59:04,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2020-10-26 18:59:04,831 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 52 [2020-10-26 18:59:04,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:59:04,831 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2020-10-26 18:59:04,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 18:59:04,832 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2020-10-26 18:59:04,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-26 18:59:04,833 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:59:04,833 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:59:04,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 18:59:04,833 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:59:04,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:59:04,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1048670154, now seen corresponding path program 7 times [2020-10-26 18:59:04,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:59:04,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [978990114] [2020-10-26 18:59:04,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:59:04,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:04,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:04,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:04,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:09,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:09,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-26 18:59:09,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 18:59:09,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-26 18:59:09,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:09,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 18:59:09,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 18:59:09,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 18:59:09,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:10,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:59:10,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:10,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:10,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:10,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:59:10,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:10,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 18:59:10,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:10,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 18:59:10,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:10,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 18:59:10,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:10,152 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2020-10-26 18:59:10,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [978990114] [2020-10-26 18:59:10,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:59:10,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 18:59:10,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037744163] [2020-10-26 18:59:10,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 18:59:10,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:59:10,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 18:59:10,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2020-10-26 18:59:10,155 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 12 states. [2020-10-26 18:59:10,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:59:10,819 INFO L93 Difference]: Finished difference Result 106 states and 112 transitions. [2020-10-26 18:59:10,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 18:59:10,820 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 58 [2020-10-26 18:59:10,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:59:10,821 INFO L225 Difference]: With dead ends: 106 [2020-10-26 18:59:10,821 INFO L226 Difference]: Without dead ends: 68 [2020-10-26 18:59:10,822 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-10-26 18:59:10,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-26 18:59:10,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 65. [2020-10-26 18:59:10,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-26 18:59:10,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2020-10-26 18:59:10,833 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 58 [2020-10-26 18:59:10,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:59:10,833 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2020-10-26 18:59:10,833 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 18:59:10,833 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2020-10-26 18:59:10,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-26 18:59:10,834 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:59:10,835 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:59:10,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 18:59:10,835 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:59:10,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:59:10,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1465647312, now seen corresponding path program 8 times [2020-10-26 18:59:10,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:59:10,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [806218576] [2020-10-26 18:59:10,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:59:10,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:10,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:10,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:11,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:15,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:15,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-26 18:59:15,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 18:59:15,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 18:59:15,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:15,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 18:59:15,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 18:59:15,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-26 18:59:15,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:16,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:59:16,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:16,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:16,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:16,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:59:16,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:16,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 18:59:16,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:16,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 18:59:16,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:16,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 18:59:16,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:16,172 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2020-10-26 18:59:16,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [806218576] [2020-10-26 18:59:16,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:59:16,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 18:59:16,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178146272] [2020-10-26 18:59:16,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 18:59:16,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:59:16,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 18:59:16,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-10-26 18:59:16,175 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 13 states. [2020-10-26 18:59:16,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:59:16,897 INFO L93 Difference]: Finished difference Result 116 states and 122 transitions. [2020-10-26 18:59:16,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 18:59:16,898 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 64 [2020-10-26 18:59:16,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:59:16,899 INFO L225 Difference]: With dead ends: 116 [2020-10-26 18:59:16,899 INFO L226 Difference]: Without dead ends: 74 [2020-10-26 18:59:16,901 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=171, Invalid=335, Unknown=0, NotChecked=0, Total=506 [2020-10-26 18:59:16,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-26 18:59:16,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 71. [2020-10-26 18:59:16,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-26 18:59:16,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2020-10-26 18:59:16,913 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 64 [2020-10-26 18:59:16,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:59:16,913 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2020-10-26 18:59:16,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 18:59:16,913 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2020-10-26 18:59:16,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-26 18:59:16,915 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:59:16,915 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:59:16,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 18:59:16,915 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:59:16,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:59:16,916 INFO L82 PathProgramCache]: Analyzing trace with hash -457233898, now seen corresponding path program 9 times [2020-10-26 18:59:16,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:59:16,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1964023595] [2020-10-26 18:59:16,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:59:16,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:16,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:16,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:17,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:21,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:21,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-26 18:59:21,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 18:59:21,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 18:59:21,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:21,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 18:59:21,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 18:59:21,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 18:59:21,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:22,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:59:22,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:22,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:22,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:22,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:59:22,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:22,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 18:59:22,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:22,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 18:59:22,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:22,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 18:59:22,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:22,271 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2020-10-26 18:59:22,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1964023595] [2020-10-26 18:59:22,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:59:22,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 18:59:22,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096720824] [2020-10-26 18:59:22,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 18:59:22,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:59:22,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 18:59:22,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-10-26 18:59:22,274 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 14 states. [2020-10-26 18:59:23,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:59:23,118 INFO L93 Difference]: Finished difference Result 126 states and 132 transitions. [2020-10-26 18:59:23,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 18:59:23,119 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 70 [2020-10-26 18:59:23,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:59:23,120 INFO L225 Difference]: With dead ends: 126 [2020-10-26 18:59:23,120 INFO L226 Difference]: Without dead ends: 80 [2020-10-26 18:59:23,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2020-10-26 18:59:23,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-26 18:59:23,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2020-10-26 18:59:23,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-26 18:59:23,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2020-10-26 18:59:23,132 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 70 [2020-10-26 18:59:23,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:59:23,132 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2020-10-26 18:59:23,132 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 18:59:23,133 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2020-10-26 18:59:23,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-26 18:59:23,134 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:59:23,134 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:59:23,134 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 18:59:23,134 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:59:23,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:59:23,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1220038780, now seen corresponding path program 10 times [2020-10-26 18:59:23,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:59:23,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [889433503] [2020-10-26 18:59:23,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:59:23,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:23,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:23,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:23,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:28,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:28,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-26 18:59:28,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 18:59:28,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-26 18:59:28,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:28,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 18:59:28,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 18:59:28,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-26 18:59:28,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:28,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:59:28,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:28,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:28,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:28,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:59:28,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:28,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 18:59:28,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:28,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 18:59:28,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:28,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 18:59:28,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:28,597 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2020-10-26 18:59:28,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [889433503] [2020-10-26 18:59:28,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:59:28,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 18:59:28,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317448575] [2020-10-26 18:59:28,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 18:59:28,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:59:28,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 18:59:28,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-10-26 18:59:28,602 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand 15 states. [2020-10-26 18:59:29,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:59:29,499 INFO L93 Difference]: Finished difference Result 136 states and 142 transitions. [2020-10-26 18:59:29,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 18:59:29,500 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 76 [2020-10-26 18:59:29,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:59:29,501 INFO L225 Difference]: With dead ends: 136 [2020-10-26 18:59:29,501 INFO L226 Difference]: Without dead ends: 86 [2020-10-26 18:59:29,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=240, Invalid=462, Unknown=0, NotChecked=0, Total=702 [2020-10-26 18:59:29,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-26 18:59:29,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2020-10-26 18:59:29,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-26 18:59:29,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2020-10-26 18:59:29,524 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 76 [2020-10-26 18:59:29,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:59:29,528 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2020-10-26 18:59:29,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 18:59:29,529 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2020-10-26 18:59:29,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-26 18:59:29,530 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:59:29,530 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:59:29,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 18:59:29,531 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:59:29,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:59:29,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1793905250, now seen corresponding path program 11 times [2020-10-26 18:59:29,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:59:29,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [557182327] [2020-10-26 18:59:29,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:59:29,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:29,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:29,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:30,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:34,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:34,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-26 18:59:34,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 18:59:34,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 18:59:34,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:34,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 18:59:34,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 18:59:34,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 18:59:34,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:34,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:59:34,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:34,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:34,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:34,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:59:34,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:34,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 18:59:34,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:34,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 18:59:34,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:34,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 18:59:34,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 18:59:34,972 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2020-10-26 18:59:34,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [557182327] [2020-10-26 18:59:34,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:59:34,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 18:59:34,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498619092] [2020-10-26 18:59:34,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 18:59:34,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:59:34,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 18:59:34,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-10-26 18:59:34,975 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand 16 states. [2020-10-26 18:59:35,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:59:35,890 INFO L93 Difference]: Finished difference Result 146 states and 152 transitions. [2020-10-26 18:59:35,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 18:59:35,894 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 82 [2020-10-26 18:59:35,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:59:35,895 INFO L225 Difference]: With dead ends: 146 [2020-10-26 18:59:35,895 INFO L226 Difference]: Without dead ends: 92 [2020-10-26 18:59:35,896 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=279, Invalid=533, Unknown=0, NotChecked=0, Total=812 [2020-10-26 18:59:35,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-26 18:59:35,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 89. [2020-10-26 18:59:35,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-26 18:59:35,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2020-10-26 18:59:35,906 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 82 [2020-10-26 18:59:35,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:59:35,906 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2020-10-26 18:59:35,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 18:59:35,907 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2020-10-26 18:59:35,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-26 18:59:35,908 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:59:35,908 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:59:35,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 18:59:35,909 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:59:35,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:59:35,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1748111304, now seen corresponding path program 12 times [2020-10-26 18:59:35,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:59:35,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1246089404] [2020-10-26 18:59:35,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:59:35,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:35,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:35,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:36,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:40,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:40,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-26 18:59:40,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 18:59:40,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-26 18:59:40,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:40,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 18:59:40,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 18:59:40,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 18:59:40,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:41,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:59:41,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:41,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:41,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:41,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:59:41,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:41,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 18:59:41,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:41,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 18:59:41,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:41,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 18:59:41,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:41,403 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2020-10-26 18:59:41,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1246089404] [2020-10-26 18:59:41,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:59:41,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 18:59:41,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611906835] [2020-10-26 18:59:41,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 18:59:41,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:59:41,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 18:59:41,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2020-10-26 18:59:41,406 INFO L87 Difference]: Start difference. First operand 89 states and 91 transitions. Second operand 17 states. [2020-10-26 18:59:42,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:59:42,318 INFO L93 Difference]: Finished difference Result 156 states and 162 transitions. [2020-10-26 18:59:42,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-26 18:59:42,318 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 88 [2020-10-26 18:59:42,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:59:42,319 INFO L225 Difference]: With dead ends: 156 [2020-10-26 18:59:42,320 INFO L226 Difference]: Without dead ends: 98 [2020-10-26 18:59:42,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=306, Invalid=564, Unknown=0, NotChecked=0, Total=870 [2020-10-26 18:59:42,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-26 18:59:42,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 95. [2020-10-26 18:59:42,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-26 18:59:42,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2020-10-26 18:59:42,342 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 88 [2020-10-26 18:59:42,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:59:42,342 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2020-10-26 18:59:42,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 18:59:42,342 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2020-10-26 18:59:42,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-26 18:59:42,343 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:59:42,344 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:59:42,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 18:59:42,344 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:59:42,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:59:42,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1445631826, now seen corresponding path program 13 times [2020-10-26 18:59:42,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:59:42,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1474346275] [2020-10-26 18:59:42,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:59:42,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:42,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:42,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:47,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:47,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-26 18:59:47,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 18:59:47,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-26 18:59:47,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:47,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 18:59:47,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 18:59:47,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-26 18:59:47,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:47,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:59:47,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:47,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:47,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:47,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:59:47,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:47,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 18:59:47,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:47,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 18:59:47,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:47,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 18:59:47,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:47,877 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-10-26 18:59:47,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1474346275] [2020-10-26 18:59:47,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:59:47,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 18:59:47,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57692614] [2020-10-26 18:59:47,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 18:59:47,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:59:47,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 18:59:47,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-10-26 18:59:47,879 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand 18 states. [2020-10-26 18:59:49,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:59:49,028 INFO L93 Difference]: Finished difference Result 166 states and 172 transitions. [2020-10-26 18:59:49,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 18:59:49,028 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 94 [2020-10-26 18:59:49,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:59:49,029 INFO L225 Difference]: With dead ends: 166 [2020-10-26 18:59:49,030 INFO L226 Difference]: Without dead ends: 104 [2020-10-26 18:59:49,031 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=366, Invalid=690, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 18:59:49,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-26 18:59:49,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 101. [2020-10-26 18:59:49,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-26 18:59:49,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2020-10-26 18:59:49,040 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 94 [2020-10-26 18:59:49,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:59:49,041 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2020-10-26 18:59:49,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 18:59:49,041 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2020-10-26 18:59:49,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-26 18:59:49,042 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:59:49,042 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:59:49,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 18:59:49,043 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:59:49,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:59:49,043 INFO L82 PathProgramCache]: Analyzing trace with hash 731659540, now seen corresponding path program 14 times [2020-10-26 18:59:49,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:59:49,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [202186419] [2020-10-26 18:59:49,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:59:49,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:49,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:49,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:54,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:54,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-26 18:59:54,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 18:59:54,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 18:59:54,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:54,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 18:59:54,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 18:59:54,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-26 18:59:54,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:54,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:59:54,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:54,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:54,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:54,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:59:54,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:54,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 18:59:54,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:54,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 18:59:54,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:54,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 18:59:54,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:54,609 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-10-26 18:59:54,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [202186419] [2020-10-26 18:59:54,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:59:54,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 18:59:54,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038720007] [2020-10-26 18:59:54,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 18:59:54,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:59:54,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 18:59:54,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2020-10-26 18:59:54,612 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand 19 states. [2020-10-26 18:59:55,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:59:55,831 INFO L93 Difference]: Finished difference Result 176 states and 182 transitions. [2020-10-26 18:59:55,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 18:59:55,832 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 100 [2020-10-26 18:59:55,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:59:55,833 INFO L225 Difference]: With dead ends: 176 [2020-10-26 18:59:55,833 INFO L226 Difference]: Without dead ends: 110 [2020-10-26 18:59:55,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=414, Invalid=776, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 18:59:55,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-26 18:59:55,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 107. [2020-10-26 18:59:55,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-26 18:59:55,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 109 transitions. [2020-10-26 18:59:55,842 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 109 transitions. Word has length 100 [2020-10-26 18:59:55,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:59:55,843 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 109 transitions. [2020-10-26 18:59:55,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 18:59:55,843 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 109 transitions. [2020-10-26 18:59:55,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-26 18:59:55,846 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:59:55,847 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:59:55,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 18:59:55,847 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:59:55,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:59:55,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1103359226, now seen corresponding path program 15 times [2020-10-26 18:59:55,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:59:55,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1955676649] [2020-10-26 18:59:55,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:59:55,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:55,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:55,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:00,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:00,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-26 19:00:00,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:00:00,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5082 [2020-10-26 19:00:00,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:00,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:00:00,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 19:00:00,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-26 19:00:00,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:01,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:00:01,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:01,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:01,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:01,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:00:01,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:01,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:00:01,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:01,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:00:01,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:01,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:00:01,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:01,551 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2020-10-26 19:00:01,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1955676649] [2020-10-26 19:00:01,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:00:01,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:00:01,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064766224] [2020-10-26 19:00:01,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 19:00:01,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:00:01,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 19:00:01,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:00:01,554 INFO L87 Difference]: Start difference. First operand 107 states and 109 transitions. Second operand 20 states. [2020-10-26 19:00:02,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:00:02,870 INFO L93 Difference]: Finished difference Result 186 states and 192 transitions. [2020-10-26 19:00:02,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 19:00:02,872 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 106 [2020-10-26 19:00:02,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:00:02,873 INFO L225 Difference]: With dead ends: 186 [2020-10-26 19:00:02,873 INFO L226 Difference]: Without dead ends: 116 [2020-10-26 19:00:02,874 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=465, Invalid=867, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:00:02,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-26 19:00:02,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 113. [2020-10-26 19:00:02,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-26 19:00:02,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 115 transitions. [2020-10-26 19:00:02,882 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 115 transitions. Word has length 106 [2020-10-26 19:00:02,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:00:02,882 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 115 transitions. [2020-10-26 19:00:02,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 19:00:02,882 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 115 transitions. [2020-10-26 19:00:02,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-26 19:00:02,884 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:00:02,884 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:00:02,884 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 19:00:02,884 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:00:02,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:00:02,885 INFO L82 PathProgramCache]: Analyzing trace with hash -553527200, now seen corresponding path program 16 times [2020-10-26 19:00:02,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:00:02,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [474324462] [2020-10-26 19:00:02,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:00:02,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:02,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:03,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:07,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:07,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-26 19:00:07,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:00:07,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-26 19:00:07,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:07,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:00:07,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 19:00:07,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-26 19:00:07,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:08,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:00:08,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:08,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:08,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:08,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:00:08,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:08,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:00:08,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:08,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:00:08,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:08,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:00:08,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:08,583 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2020-10-26 19:00:08,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [474324462] [2020-10-26 19:00:08,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:00:08,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 19:00:08,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429217172] [2020-10-26 19:00:08,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 19:00:08,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:00:08,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 19:00:08,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:00:08,585 INFO L87 Difference]: Start difference. First operand 113 states and 115 transitions. Second operand 21 states. [2020-10-26 19:00:10,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:00:10,021 INFO L93 Difference]: Finished difference Result 196 states and 202 transitions. [2020-10-26 19:00:10,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-26 19:00:10,022 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 112 [2020-10-26 19:00:10,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:00:10,023 INFO L225 Difference]: With dead ends: 196 [2020-10-26 19:00:10,024 INFO L226 Difference]: Without dead ends: 122 [2020-10-26 19:00:10,025 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=519, Invalid=963, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:00:10,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-26 19:00:10,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 119. [2020-10-26 19:00:10,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-26 19:00:10,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2020-10-26 19:00:10,032 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 112 [2020-10-26 19:00:10,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:00:10,033 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2020-10-26 19:00:10,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 19:00:10,033 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2020-10-26 19:00:10,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-26 19:00:10,034 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:00:10,034 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:00:10,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 19:00:10,035 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:00:10,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:00:10,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1518559046, now seen corresponding path program 17 times [2020-10-26 19:00:10,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:00:10,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1861011204] [2020-10-26 19:00:10,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:00:10,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:10,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:10,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:15,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:15,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-26 19:00:15,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:00:15,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-26 19:00:15,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:15,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:00:15,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 19:00:15,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 19:00:15,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:15,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:00:15,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:15,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:15,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:15,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:00:15,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:15,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:00:15,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:15,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:00:15,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:15,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:00:15,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:15,787 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2020-10-26 19:00:15,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1861011204] [2020-10-26 19:00:15,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:00:15,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-26 19:00:15,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587088991] [2020-10-26 19:00:15,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-26 19:00:15,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:00:15,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-26 19:00:15,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:00:15,790 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand 22 states. [2020-10-26 19:00:17,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:00:17,337 INFO L93 Difference]: Finished difference Result 206 states and 212 transitions. [2020-10-26 19:00:17,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-26 19:00:17,338 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 118 [2020-10-26 19:00:17,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:00:17,340 INFO L225 Difference]: With dead ends: 206 [2020-10-26 19:00:17,340 INFO L226 Difference]: Without dead ends: 128 [2020-10-26 19:00:17,341 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=556, Invalid=1004, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 19:00:17,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-26 19:00:17,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 125. [2020-10-26 19:00:17,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-26 19:00:17,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 127 transitions. [2020-10-26 19:00:17,349 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 127 transitions. Word has length 118 [2020-10-26 19:00:17,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:00:17,349 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 127 transitions. [2020-10-26 19:00:17,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-26 19:00:17,349 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 127 transitions. [2020-10-26 19:00:17,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-26 19:00:17,351 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:00:17,351 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:00:17,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 19:00:17,351 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:00:17,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:00:17,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1242701396, now seen corresponding path program 18 times [2020-10-26 19:00:17,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:00:17,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [483306132] [2020-10-26 19:00:17,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:00:17,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:17,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:17,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:22,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:22,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-26 19:00:22,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:00:22,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5071 [2020-10-26 19:00:22,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:22,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:00:22,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 19:00:22,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-26 19:00:22,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:23,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:00:23,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:23,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:23,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:23,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:00:23,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:23,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:00:23,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:23,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:00:23,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:23,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:00:23,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:23,196 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2020-10-26 19:00:23,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [483306132] [2020-10-26 19:00:23,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:00:23,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-26 19:00:23,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538447680] [2020-10-26 19:00:23,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-26 19:00:23,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:00:23,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-26 19:00:23,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:00:23,199 INFO L87 Difference]: Start difference. First operand 125 states and 127 transitions. Second operand 23 states. [2020-10-26 19:00:24,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:00:24,686 INFO L93 Difference]: Finished difference Result 216 states and 222 transitions. [2020-10-26 19:00:24,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-26 19:00:24,687 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 124 [2020-10-26 19:00:24,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:00:24,689 INFO L225 Difference]: With dead ends: 216 [2020-10-26 19:00:24,689 INFO L226 Difference]: Without dead ends: 134 [2020-10-26 19:00:24,690 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=615, Invalid=1107, Unknown=0, NotChecked=0, Total=1722 [2020-10-26 19:00:24,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-26 19:00:24,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 131. [2020-10-26 19:00:24,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-26 19:00:24,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 133 transitions. [2020-10-26 19:00:24,697 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 133 transitions. Word has length 124 [2020-10-26 19:00:24,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:00:24,697 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 133 transitions. [2020-10-26 19:00:24,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-26 19:00:24,697 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 133 transitions. [2020-10-26 19:00:24,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-26 19:00:24,698 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:00:24,699 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:00:24,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 19:00:24,699 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:00:24,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:00:24,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1667153810, now seen corresponding path program 19 times [2020-10-26 19:00:24,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:00:24,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2035494592] [2020-10-26 19:00:24,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:00:24,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:24,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:24,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:29,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:29,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-10-26 19:00:29,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:00:29,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5134 [2020-10-26 19:00:29,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:29,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:00:29,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 19:00:29,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 19:00:29,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:30,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:00:30,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:30,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:30,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:30,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:00:30,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:30,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:00:30,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:30,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:00:30,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:30,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:00:30,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:30,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1083 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 722 trivial. 0 not checked. [2020-10-26 19:00:30,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2035494592] [2020-10-26 19:00:30,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:00:30,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-26 19:00:30,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627095291] [2020-10-26 19:00:30,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-26 19:00:30,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:00:30,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-26 19:00:30,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:00:30,655 INFO L87 Difference]: Start difference. First operand 131 states and 133 transitions. Second operand 24 states. [2020-10-26 19:00:32,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:00:32,375 INFO L93 Difference]: Finished difference Result 226 states and 232 transitions. [2020-10-26 19:00:32,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-26 19:00:32,377 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 130 [2020-10-26 19:00:32,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:00:32,378 INFO L225 Difference]: With dead ends: 226 [2020-10-26 19:00:32,378 INFO L226 Difference]: Without dead ends: 140 [2020-10-26 19:00:32,380 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=677, Invalid=1215, Unknown=0, NotChecked=0, Total=1892 [2020-10-26 19:00:32,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-26 19:00:32,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 137. [2020-10-26 19:00:32,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-26 19:00:32,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 139 transitions. [2020-10-26 19:00:32,388 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 139 transitions. Word has length 130 [2020-10-26 19:00:32,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:00:32,388 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 139 transitions. [2020-10-26 19:00:32,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-26 19:00:32,388 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 139 transitions. [2020-10-26 19:00:32,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-26 19:00:32,390 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:00:32,390 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:00:32,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 19:00:32,390 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:00:32,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:00:32,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1955899144, now seen corresponding path program 20 times [2020-10-26 19:00:32,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:00:32,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [305142276] [2020-10-26 19:00:32,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:00:32,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:32,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:32,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:37,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:37,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-26 19:00:37,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:00:37,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5108 [2020-10-26 19:00:37,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:37,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:00:37,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 19:00:37,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-26 19:00:37,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:38,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:00:38,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:38,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:38,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:38,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:00:38,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:38,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:00:38,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:38,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:00:38,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:38,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:00:38,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:38,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2020-10-26 19:00:38,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [305142276] [2020-10-26 19:00:38,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:00:38,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-26 19:00:38,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506351628] [2020-10-26 19:00:38,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-26 19:00:38,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:00:38,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-26 19:00:38,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=343, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:00:38,365 INFO L87 Difference]: Start difference. First operand 137 states and 139 transitions. Second operand 25 states. [2020-10-26 19:00:40,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:00:40,212 INFO L93 Difference]: Finished difference Result 236 states and 242 transitions. [2020-10-26 19:00:40,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-26 19:00:40,213 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 136 [2020-10-26 19:00:40,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:00:40,215 INFO L225 Difference]: With dead ends: 236 [2020-10-26 19:00:40,215 INFO L226 Difference]: Without dead ends: 146 [2020-10-26 19:00:40,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=765, Invalid=1397, Unknown=0, NotChecked=0, Total=2162 [2020-10-26 19:00:40,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-26 19:00:40,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 143. [2020-10-26 19:00:40,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-26 19:00:40,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 145 transitions. [2020-10-26 19:00:40,224 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 145 transitions. Word has length 136 [2020-10-26 19:00:40,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:00:40,224 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 145 transitions. [2020-10-26 19:00:40,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-26 19:00:40,224 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 145 transitions. [2020-10-26 19:00:40,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-26 19:00:40,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:00:40,226 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:00:40,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 19:00:40,226 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:00:40,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:00:40,227 INFO L82 PathProgramCache]: Analyzing trace with hash -752808482, now seen corresponding path program 21 times [2020-10-26 19:00:40,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:00:40,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1385546020] [2020-10-26 19:00:40,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:00:40,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:40,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:40,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:45,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:45,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 152 [2020-10-26 19:00:45,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:00:45,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5100 [2020-10-26 19:00:45,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:45,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:00:45,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 19:00:45,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-26 19:00:45,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:46,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:00:46,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:46,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:46,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:46,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:00:46,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:46,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:00:46,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:46,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:00:46,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:46,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:00:46,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:46,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1323 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 882 trivial. 0 not checked. [2020-10-26 19:00:46,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1385546020] [2020-10-26 19:00:46,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:00:46,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-26 19:00:46,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139867733] [2020-10-26 19:00:46,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-26 19:00:46,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:00:46,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-26 19:00:46,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:00:46,351 INFO L87 Difference]: Start difference. First operand 143 states and 145 transitions. Second operand 26 states. [2020-10-26 19:00:48,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:00:48,116 INFO L93 Difference]: Finished difference Result 246 states and 252 transitions. [2020-10-26 19:00:48,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-26 19:00:48,120 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 142 [2020-10-26 19:00:48,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:00:48,121 INFO L225 Difference]: With dead ends: 246 [2020-10-26 19:00:48,121 INFO L226 Difference]: Without dead ends: 152 [2020-10-26 19:00:48,123 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=834, Invalid=1518, Unknown=0, NotChecked=0, Total=2352 [2020-10-26 19:00:48,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-26 19:00:48,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 149. [2020-10-26 19:00:48,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-26 19:00:48,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 151 transitions. [2020-10-26 19:00:48,132 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 151 transitions. Word has length 142 [2020-10-26 19:00:48,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:00:48,133 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 151 transitions. [2020-10-26 19:00:48,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-26 19:00:48,133 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 151 transitions. [2020-10-26 19:00:48,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-26 19:00:48,135 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:00:48,135 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:00:48,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 19:00:48,135 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:00:48,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:00:48,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1576714684, now seen corresponding path program 22 times [2020-10-26 19:00:48,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:00:48,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [305103764] [2020-10-26 19:00:48,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:00:48,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:48,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:48,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:53,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:53,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-10-26 19:00:53,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:00:53,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5199 [2020-10-26 19:00:53,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:53,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:00:53,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 19:00:53,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-26 19:00:53,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:54,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:00:54,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:54,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:54,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:54,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:00:54,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:54,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:00:54,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:54,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:00:54,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:54,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:00:54,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:54,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2020-10-26 19:00:54,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [305103764] [2020-10-26 19:00:54,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:00:54,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-26 19:00:54,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376503998] [2020-10-26 19:00:54,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-26 19:00:54,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:00:54,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-26 19:00:54,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:00:54,393 INFO L87 Difference]: Start difference. First operand 149 states and 151 transitions. Second operand 27 states. [2020-10-26 19:00:56,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:00:56,484 INFO L93 Difference]: Finished difference Result 256 states and 262 transitions. [2020-10-26 19:00:56,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-26 19:00:56,485 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 148 [2020-10-26 19:00:56,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:00:56,486 INFO L225 Difference]: With dead ends: 256 [2020-10-26 19:00:56,486 INFO L226 Difference]: Without dead ends: 158 [2020-10-26 19:00:56,488 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=906, Invalid=1644, Unknown=0, NotChecked=0, Total=2550 [2020-10-26 19:00:56,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-26 19:00:56,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 155. [2020-10-26 19:00:56,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-26 19:00:56,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 157 transitions. [2020-10-26 19:00:56,495 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 157 transitions. Word has length 148 [2020-10-26 19:00:56,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:00:56,495 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 157 transitions. [2020-10-26 19:00:56,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-26 19:00:56,495 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 157 transitions. [2020-10-26 19:00:56,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-10-26 19:00:56,497 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:00:56,497 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:00:56,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 19:00:56,497 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:00:56,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:00:56,498 INFO L82 PathProgramCache]: Analyzing trace with hash -401257942, now seen corresponding path program 23 times [2020-10-26 19:00:56,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:00:56,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [140069518] [2020-10-26 19:00:56,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:00:56,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:56,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:56,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:01,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:01,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-10-26 19:01:01,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:01:01,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5219 [2020-10-26 19:01:01,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:01,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:01:01,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 19:01:01,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 19:01:01,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:02,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:01:02,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:02,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:02,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:02,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:01:02,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:02,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:01:02,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:02,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:01:02,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:02,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:01:02,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:02,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1587 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1058 trivial. 0 not checked. [2020-10-26 19:01:02,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [140069518] [2020-10-26 19:01:02,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:01:02,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-26 19:01:02,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856616787] [2020-10-26 19:01:02,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-26 19:01:02,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:01:02,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-26 19:01:02,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=427, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:01:02,835 INFO L87 Difference]: Start difference. First operand 155 states and 157 transitions. Second operand 28 states. [2020-10-26 19:01:05,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:01:05,047 INFO L93 Difference]: Finished difference Result 266 states and 272 transitions. [2020-10-26 19:01:05,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-26 19:01:05,049 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 154 [2020-10-26 19:01:05,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:01:05,050 INFO L225 Difference]: With dead ends: 266 [2020-10-26 19:01:05,050 INFO L226 Difference]: Without dead ends: 164 [2020-10-26 19:01:05,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=981, Invalid=1775, Unknown=0, NotChecked=0, Total=2756 [2020-10-26 19:01:05,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-26 19:01:05,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 161. [2020-10-26 19:01:05,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-26 19:01:05,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 163 transitions. [2020-10-26 19:01:05,058 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 163 transitions. Word has length 154 [2020-10-26 19:01:05,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:01:05,059 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 163 transitions. [2020-10-26 19:01:05,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-26 19:01:05,059 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 163 transitions. [2020-10-26 19:01:05,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-10-26 19:01:05,061 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:01:05,061 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:01:05,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 19:01:05,061 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:01:05,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:01:05,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1673957776, now seen corresponding path program 24 times [2020-10-26 19:01:05,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:01:05,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [443260676] [2020-10-26 19:01:05,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:01:05,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:05,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:05,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:10,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:10,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 170 [2020-10-26 19:01:10,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:01:10,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-26 19:01:10,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:10,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:01:10,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 19:01:10,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-26 19:01:10,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:11,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:01:11,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:11,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:11,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:11,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:01:11,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:11,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:01:11,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:11,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:01:11,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:11,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:01:11,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:11,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1728 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 1152 trivial. 0 not checked. [2020-10-26 19:01:11,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [443260676] [2020-10-26 19:01:11,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:01:11,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-26 19:01:11,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223095645] [2020-10-26 19:01:11,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-26 19:01:11,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:01:11,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-26 19:01:11,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:01:11,258 INFO L87 Difference]: Start difference. First operand 161 states and 163 transitions. Second operand 29 states. [2020-10-26 19:01:13,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:01:13,569 INFO L93 Difference]: Finished difference Result 276 states and 282 transitions. [2020-10-26 19:01:13,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-26 19:01:13,570 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 160 [2020-10-26 19:01:13,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:01:13,572 INFO L225 Difference]: With dead ends: 276 [2020-10-26 19:01:13,572 INFO L226 Difference]: Without dead ends: 170 [2020-10-26 19:01:13,574 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1032, Invalid=1830, Unknown=0, NotChecked=0, Total=2862 [2020-10-26 19:01:13,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-26 19:01:13,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 167. [2020-10-26 19:01:13,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-26 19:01:13,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 169 transitions. [2020-10-26 19:01:13,583 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 169 transitions. Word has length 160 [2020-10-26 19:01:13,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:01:13,583 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 169 transitions. [2020-10-26 19:01:13,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-26 19:01:13,583 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 169 transitions. [2020-10-26 19:01:13,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-10-26 19:01:13,584 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:01:13,585 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:01:13,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-26 19:01:13,585 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:01:13,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:01:13,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1745253494, now seen corresponding path program 25 times [2020-10-26 19:01:13,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:01:13,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1036510270] [2020-10-26 19:01:13,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:01:13,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:13,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:13,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:18,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:18,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 176 [2020-10-26 19:01:18,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:01:18,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5138 [2020-10-26 19:01:18,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:18,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:01:18,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 19:01:18,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-26 19:01:18,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:20,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:01:20,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:20,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:20,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:20,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:01:20,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:20,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:01:20,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:20,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:01:20,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:20,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:01:20,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:20,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1875 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 1250 trivial. 0 not checked. [2020-10-26 19:01:20,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1036510270] [2020-10-26 19:01:20,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:01:20,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-26 19:01:20,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318461797] [2020-10-26 19:01:20,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-26 19:01:20,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:01:20,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-26 19:01:20,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:01:20,048 INFO L87 Difference]: Start difference. First operand 167 states and 169 transitions. Second operand 30 states. [2020-10-26 19:01:22,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:01:22,492 INFO L93 Difference]: Finished difference Result 286 states and 292 transitions. [2020-10-26 19:01:22,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-26 19:01:22,493 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 166 [2020-10-26 19:01:22,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:01:22,495 INFO L225 Difference]: With dead ends: 286 [2020-10-26 19:01:22,495 INFO L226 Difference]: Without dead ends: 176 [2020-10-26 19:01:22,497 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1112, Invalid=1968, Unknown=0, NotChecked=0, Total=3080 [2020-10-26 19:01:22,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-26 19:01:22,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 173. [2020-10-26 19:01:22,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-10-26 19:01:22,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 175 transitions. [2020-10-26 19:01:22,504 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 175 transitions. Word has length 166 [2020-10-26 19:01:22,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:01:22,505 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 175 transitions. [2020-10-26 19:01:22,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-26 19:01:22,505 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 175 transitions. [2020-10-26 19:01:22,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-10-26 19:01:22,506 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:01:22,506 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:01:22,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-26 19:01:22,506 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:01:22,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:01:22,507 INFO L82 PathProgramCache]: Analyzing trace with hash 574247644, now seen corresponding path program 26 times [2020-10-26 19:01:22,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:01:22,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1121532338] [2020-10-26 19:01:22,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:01:22,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:22,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:22,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:27,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:27,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 182 [2020-10-26 19:01:27,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:01:27,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5171 [2020-10-26 19:01:27,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:27,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:01:27,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 19:01:27,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-26 19:01:27,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:29,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:01:29,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:29,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:29,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:29,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:01:29,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:29,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:01:29,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:29,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:01:29,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:29,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:01:29,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:29,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2028 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 1352 trivial. 0 not checked. [2020-10-26 19:01:29,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1121532338] [2020-10-26 19:01:29,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:01:29,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-26 19:01:29,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228497222] [2020-10-26 19:01:29,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-26 19:01:29,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:01:29,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-26 19:01:29,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=520, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:01:29,079 INFO L87 Difference]: Start difference. First operand 173 states and 175 transitions. Second operand 31 states. [2020-10-26 19:01:31,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:01:31,681 INFO L93 Difference]: Finished difference Result 296 states and 302 transitions. [2020-10-26 19:01:31,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-26 19:01:31,682 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 172 [2020-10-26 19:01:31,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:01:31,684 INFO L225 Difference]: With dead ends: 296 [2020-10-26 19:01:31,685 INFO L226 Difference]: Without dead ends: 182 [2020-10-26 19:01:31,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1224, Invalid=2198, Unknown=0, NotChecked=0, Total=3422 [2020-10-26 19:01:31,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-26 19:01:31,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 179. [2020-10-26 19:01:31,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-10-26 19:01:31,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 181 transitions. [2020-10-26 19:01:31,696 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 181 transitions. Word has length 172 [2020-10-26 19:01:31,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:01:31,696 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 181 transitions. [2020-10-26 19:01:31,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-26 19:01:31,696 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 181 transitions. [2020-10-26 19:01:31,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-10-26 19:01:31,698 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:01:31,698 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:01:31,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-26 19:01:31,698 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:01:31,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:01:31,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1614777538, now seen corresponding path program 27 times [2020-10-26 19:01:31,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:01:31,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [903762337] [2020-10-26 19:01:31,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:01:31,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:31,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:31,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:36,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:36,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 188 [2020-10-26 19:01:36,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:01:36,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5200 [2020-10-26 19:01:36,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:36,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 19:01:36,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 19:01:36,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-26 19:01:36,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:38,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:01:38,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:38,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:38,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:38,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:01:38,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:38,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:01:38,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:38,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:01:38,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:38,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:01:38,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:38,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2187 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 1458 trivial. 0 not checked. [2020-10-26 19:01:38,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [903762337] [2020-10-26 19:01:38,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:01:38,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-26 19:01:38,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818980289] [2020-10-26 19:01:38,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-26 19:01:38,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:01:38,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-26 19:01:38,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:01:38,294 INFO L87 Difference]: Start difference. First operand 179 states and 181 transitions. Second operand 32 states. [2020-10-26 19:01:41,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:01:41,063 INFO L93 Difference]: Finished difference Result 306 states and 312 transitions. [2020-10-26 19:01:41,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-26 19:01:41,065 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 178 [2020-10-26 19:01:41,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:01:41,067 INFO L225 Difference]: With dead ends: 306 [2020-10-26 19:01:41,067 INFO L226 Difference]: Without dead ends: 188 [2020-10-26 19:01:41,069 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1281, Invalid=2259, Unknown=0, NotChecked=0, Total=3540 [2020-10-26 19:01:41,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-10-26 19:01:41,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 185. [2020-10-26 19:01:41,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-10-26 19:01:41,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 187 transitions. [2020-10-26 19:01:41,078 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 187 transitions. Word has length 178 [2020-10-26 19:01:41,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:01:41,078 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 187 transitions. [2020-10-26 19:01:41,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-26 19:01:41,078 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 187 transitions. [2020-10-26 19:01:41,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2020-10-26 19:01:41,080 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:01:41,080 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:01:41,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-26 19:01:41,080 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:01:41,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:01:41,081 INFO L82 PathProgramCache]: Analyzing trace with hash -697597400, now seen corresponding path program 28 times [2020-10-26 19:01:41,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:01:41,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [769801312] [2020-10-26 19:01:41,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:01:41,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:41,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:41,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:46,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:46,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 194 [2020-10-26 19:01:46,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:01:46,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-26 19:01:46,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:46,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-26 19:01:46,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 19:01:46,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-10-26 19:01:46,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:47,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:01:47,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:47,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:47,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:47,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:01:47,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:47,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:01:47,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:47,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:01:47,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:47,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:01:47,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:47,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 1568 trivial. 0 not checked. [2020-10-26 19:01:47,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [769801312] [2020-10-26 19:01:47,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:01:47,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-26 19:01:47,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219953676] [2020-10-26 19:01:47,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-26 19:01:47,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:01:47,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-26 19:01:47,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=469, Invalid=587, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:01:47,705 INFO L87 Difference]: Start difference. First operand 185 states and 187 transitions. Second operand 33 states. [2020-10-26 19:01:50,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:01:50,604 INFO L93 Difference]: Finished difference Result 316 states and 322 transitions. [2020-10-26 19:01:50,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-26 19:01:50,605 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 184 [2020-10-26 19:01:50,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:01:50,607 INFO L225 Difference]: With dead ends: 316 [2020-10-26 19:01:50,607 INFO L226 Difference]: Without dead ends: 194 [2020-10-26 19:01:50,609 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1401, Invalid=2505, Unknown=0, NotChecked=0, Total=3906 [2020-10-26 19:01:50,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-26 19:01:50,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 191. [2020-10-26 19:01:50,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-10-26 19:01:50,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 193 transitions. [2020-10-26 19:01:50,619 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 193 transitions. Word has length 184 [2020-10-26 19:01:50,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:01:50,619 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 193 transitions. [2020-10-26 19:01:50,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-26 19:01:50,619 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 193 transitions. [2020-10-26 19:01:50,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-10-26 19:01:50,621 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:01:50,621 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:01:50,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-26 19:01:50,621 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:01:50,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:01:50,622 INFO L82 PathProgramCache]: Analyzing trace with hash -443837682, now seen corresponding path program 29 times [2020-10-26 19:01:50,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:01:50,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [282040852] [2020-10-26 19:01:50,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:01:50,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:50,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:50,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:55,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:55,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 200 [2020-10-26 19:01:55,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:01:55,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-26 19:01:55,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:55,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-26 19:01:55,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 19:01:55,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-26 19:01:55,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:57,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:01:57,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:57,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:57,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:57,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:01:57,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:57,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:01:57,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:57,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:01:57,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:57,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:01:57,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:57,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2523 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1682 trivial. 0 not checked. [2020-10-26 19:01:57,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [282040852] [2020-10-26 19:01:57,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:01:57,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-26 19:01:57,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062815407] [2020-10-26 19:01:57,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-26 19:01:57,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:01:57,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-26 19:01:57,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:01:57,254 INFO L87 Difference]: Start difference. First operand 191 states and 193 transitions. Second operand 34 states. [2020-10-26 19:02:00,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:02:00,333 INFO L93 Difference]: Finished difference Result 326 states and 332 transitions. [2020-10-26 19:02:00,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-26 19:02:00,334 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 190 [2020-10-26 19:02:00,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:02:00,336 INFO L225 Difference]: With dead ends: 326 [2020-10-26 19:02:00,336 INFO L226 Difference]: Without dead ends: 200 [2020-10-26 19:02:00,343 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1462, Invalid=2570, Unknown=0, NotChecked=0, Total=4032 [2020-10-26 19:02:00,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-26 19:02:00,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 197. [2020-10-26 19:02:00,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-10-26 19:02:00,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 199 transitions. [2020-10-26 19:02:00,354 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 199 transitions. Word has length 190 [2020-10-26 19:02:00,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:02:00,354 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 199 transitions. [2020-10-26 19:02:00,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-26 19:02:00,354 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 199 transitions. [2020-10-26 19:02:00,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-10-26 19:02:00,356 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:02:00,357 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:02:00,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-26 19:02:00,357 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:02:00,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:02:00,358 INFO L82 PathProgramCache]: Analyzing trace with hash -521855116, now seen corresponding path program 30 times [2020-10-26 19:02:00,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:02:00,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1191423510] [2020-10-26 19:02:00,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:02:00,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:00,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:00,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:05,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:05,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 206 [2020-10-26 19:02:05,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:05,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5255 [2020-10-26 19:02:05,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:05,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-26 19:02:05,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 19:02:05,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-26 19:02:05,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:07,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:02:07,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:07,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:07,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:07,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:02:07,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:02:07,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:02:07,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:07,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:02:07,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:02:07,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:02:07,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:07,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2700 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 1800 trivial. 0 not checked. [2020-10-26 19:02:07,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1191423510] [2020-10-26 19:02:07,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:02:07,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-26 19:02:07,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128591595] [2020-10-26 19:02:07,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-26 19:02:07,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:02:07,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-26 19:02:07,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:02:07,353 INFO L87 Difference]: Start difference. First operand 197 states and 199 transitions. Second operand 35 states. [2020-10-26 19:02:10,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:02:10,545 INFO L93 Difference]: Finished difference Result 336 states and 342 transitions. [2020-10-26 19:02:10,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-26 19:02:10,547 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 196 [2020-10-26 19:02:10,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:02:10,548 INFO L225 Difference]: With dead ends: 336 [2020-10-26 19:02:10,548 INFO L226 Difference]: Without dead ends: 206 [2020-10-26 19:02:10,550 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1557, Invalid=2733, Unknown=0, NotChecked=0, Total=4290 [2020-10-26 19:02:10,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-26 19:02:10,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 203. [2020-10-26 19:02:10,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-10-26 19:02:10,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 205 transitions. [2020-10-26 19:02:10,559 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 205 transitions. Word has length 196 [2020-10-26 19:02:10,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:02:10,560 INFO L481 AbstractCegarLoop]: Abstraction has 203 states and 205 transitions. [2020-10-26 19:02:10,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-26 19:02:10,560 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 205 transitions. [2020-10-26 19:02:10,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2020-10-26 19:02:10,561 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:02:10,561 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:02:10,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-26 19:02:10,562 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:02:10,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:02:10,562 INFO L82 PathProgramCache]: Analyzing trace with hash -734689446, now seen corresponding path program 31 times [2020-10-26 19:02:10,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:02:10,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1410108346] [2020-10-26 19:02:10,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:02:10,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:10,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:10,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:15,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:15,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 212 [2020-10-26 19:02:15,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:15,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5061 [2020-10-26 19:02:15,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:15,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-26 19:02:15,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 19:02:15,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-26 19:02:15,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:17,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:02:17,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:17,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:17,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:17,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:02:17,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:02:17,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:02:17,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:17,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:02:17,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:02:17,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:02:17,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:17,457 INFO L134 CoverageAnalysis]: Checked inductivity of 2883 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 1922 trivial. 0 not checked. [2020-10-26 19:02:17,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1410108346] [2020-10-26 19:02:17,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:02:17,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-26 19:02:17,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727518956] [2020-10-26 19:02:17,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-26 19:02:17,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:02:17,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-26 19:02:17,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:02:17,459 INFO L87 Difference]: Start difference. First operand 203 states and 205 transitions. Second operand 36 states. [2020-10-26 19:02:20,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:02:20,559 INFO L93 Difference]: Finished difference Result 346 states and 352 transitions. [2020-10-26 19:02:20,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-26 19:02:20,560 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 202 [2020-10-26 19:02:20,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:02:20,562 INFO L225 Difference]: With dead ends: 346 [2020-10-26 19:02:20,562 INFO L226 Difference]: Without dead ends: 212 [2020-10-26 19:02:20,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1655, Invalid=2901, Unknown=0, NotChecked=0, Total=4556 [2020-10-26 19:02:20,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-26 19:02:20,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 209. [2020-10-26 19:02:20,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-10-26 19:02:20,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 211 transitions. [2020-10-26 19:02:20,574 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 211 transitions. Word has length 202 [2020-10-26 19:02:20,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:02:20,575 INFO L481 AbstractCegarLoop]: Abstraction has 209 states and 211 transitions. [2020-10-26 19:02:20,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-26 19:02:20,575 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 211 transitions. [2020-10-26 19:02:20,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-10-26 19:02:20,576 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:02:20,576 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:02:20,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-26 19:02:20,577 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:02:20,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:02:20,577 INFO L82 PathProgramCache]: Analyzing trace with hash -911070528, now seen corresponding path program 32 times [2020-10-26 19:02:20,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:02:20,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1800945743] [2020-10-26 19:02:20,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:02:20,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:20,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:20,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking...