/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/ldv-regression/test25-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 14:39:16,159 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 14:39:16,162 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 14:39:16,211 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 14:39:16,212 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 14:39:16,219 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 14:39:16,221 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 14:39:16,226 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 14:39:16,244 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 14:39:16,246 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 14:39:16,247 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 14:39:16,248 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 14:39:16,249 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 14:39:16,251 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 14:39:16,252 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 14:39:16,254 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 14:39:16,255 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 14:39:16,256 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 14:39:16,258 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 14:39:16,261 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 14:39:16,263 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 14:39:16,264 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 14:39:16,266 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 14:39:16,267 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 14:39:16,270 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 14:39:16,270 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 14:39:16,271 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 14:39:16,272 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 14:39:16,272 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 14:39:16,273 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 14:39:16,274 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 14:39:16,275 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 14:39:16,276 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 14:39:16,277 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 14:39:16,278 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 14:39:16,279 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 14:39:16,279 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 14:39:16,280 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 14:39:16,280 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 14:39:16,281 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 14:39:16,282 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 14:39:16,283 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 14:39:16,310 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 14:39:16,311 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 14:39:16,312 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 14:39:16,312 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 14:39:16,313 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 14:39:16,313 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 14:39:16,313 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 14:39:16,313 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 14:39:16,314 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 14:39:16,314 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 14:39:16,314 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 14:39:16,314 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 14:39:16,314 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 14:39:16,315 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 14:39:16,315 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 14:39:16,315 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 14:39:16,315 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 14:39:16,315 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 14:39:16,316 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 14:39:16,316 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 14:39:16,316 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 14:39:16,316 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:39:16,316 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 14:39:16,317 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 14:39:16,317 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 14:39:16,317 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 14:39:16,317 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 14:39:16,318 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 14:39:16,318 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 14:39:16,318 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 14:39:16,701 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 14:39:16,737 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 14:39:16,741 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 14:39:16,742 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 14:39:16,743 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 14:39:16,746 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test25-1.c [2020-10-28 14:39:16,835 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ae65c5602/b7db0dc5f44f44d69f1334147fc6c037/FLAGb9f9e83c5 [2020-10-28 14:39:17,489 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 14:39:17,489 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/test25-1.c [2020-10-28 14:39:17,497 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ae65c5602/b7db0dc5f44f44d69f1334147fc6c037/FLAGb9f9e83c5 [2020-10-28 14:39:17,849 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ae65c5602/b7db0dc5f44f44d69f1334147fc6c037 [2020-10-28 14:39:17,852 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 14:39:17,862 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 14:39:17,866 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 14:39:17,866 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 14:39:17,870 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 14:39:17,872 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:39:17" (1/1) ... [2020-10-28 14:39:17,876 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a25bbf2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:39:17, skipping insertion in model container [2020-10-28 14:39:17,876 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:39:17" (1/1) ... [2020-10-28 14:39:17,885 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 14:39:17,908 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 14:39:18,137 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:39:18,146 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 14:39:18,170 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:39:18,189 INFO L208 MainTranslator]: Completed translation [2020-10-28 14:39:18,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:39:18 WrapperNode [2020-10-28 14:39:18,189 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 14:39:18,191 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 14:39:18,191 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 14:39:18,191 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 14:39:18,205 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:39:18" (1/1) ... [2020-10-28 14:39:18,205 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:39:18" (1/1) ... [2020-10-28 14:39:18,215 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:39:18" (1/1) ... [2020-10-28 14:39:18,215 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:39:18" (1/1) ... [2020-10-28 14:39:18,226 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:39:18" (1/1) ... [2020-10-28 14:39:18,231 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:39:18" (1/1) ... [2020-10-28 14:39:18,233 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:39:18" (1/1) ... [2020-10-28 14:39:18,236 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 14:39:18,238 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 14:39:18,238 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 14:39:18,238 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 14:39:18,239 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:39:18" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:39:18,327 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 14:39:18,328 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 14:39:18,328 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 14:39:18,328 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-10-28 14:39:18,328 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 14:39:18,328 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 14:39:18,329 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 14:39:18,329 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 14:39:18,329 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 14:39:18,329 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 14:39:18,330 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 14:39:18,331 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-28 14:39:18,331 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 14:39:18,331 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 14:39:18,331 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 14:39:18,331 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-28 14:39:18,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 14:39:18,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 14:39:18,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 14:39:18,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 14:39:18,899 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 14:39:18,899 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-28 14:39:18,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:39:18 BoogieIcfgContainer [2020-10-28 14:39:18,902 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 14:39:18,907 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 14:39:18,908 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 14:39:18,912 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 14:39:18,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 02:39:17" (1/3) ... [2020-10-28 14:39:18,913 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@713a2ef2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:39:18, skipping insertion in model container [2020-10-28 14:39:18,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:39:18" (2/3) ... [2020-10-28 14:39:18,915 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@713a2ef2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:39:18, skipping insertion in model container [2020-10-28 14:39:18,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:39:18" (3/3) ... [2020-10-28 14:39:18,917 INFO L111 eAbstractionObserver]: Analyzing ICFG test25-1.c [2020-10-28 14:39:18,930 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 14:39:18,936 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 14:39:18,952 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 14:39:19,022 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 14:39:19,023 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 14:39:19,023 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 14:39:19,023 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 14:39:19,023 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 14:39:19,024 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 14:39:19,024 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 14:39:19,024 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 14:39:19,055 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-10-28 14:39:19,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-28 14:39:19,064 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:39:19,065 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:39:19,066 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:39:19,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:39:19,076 INFO L82 PathProgramCache]: Analyzing trace with hash 597245021, now seen corresponding path program 1 times [2020-10-28 14:39:19,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:39:19,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [624001441] [2020-10-28 14:39:19,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:39:19,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:19,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:19,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:19,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:19,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-28 14:39:19,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:39:19,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 435 [2020-10-28 14:39:19,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:19,717 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:19,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:39:19,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 14:39:19,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:39:19,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 14:39:19,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:39:19,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:19,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:19,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:19,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:39:19,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:19,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 14:39:19,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:19,817 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:19,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:39:19,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:39:19,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:39:19,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:39:19,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-28 14:39:19,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:19,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:19,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:19,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:39:19,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:19,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:39:19,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:19,836 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:19,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:39:19,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:39:19,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:39:19,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:39:19,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:39:19,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [624001441] [2020-10-28 14:39:19,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:39:19,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 14:39:19,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621983420] [2020-10-28 14:39:19,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 14:39:19,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:39:19,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 14:39:19,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 14:39:19,872 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2020-10-28 14:39:19,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:39:19,969 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2020-10-28 14:39:19,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 14:39:19,971 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-10-28 14:39:19,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:39:19,979 INFO L225 Difference]: With dead ends: 47 [2020-10-28 14:39:19,980 INFO L226 Difference]: Without dead ends: 21 [2020-10-28 14:39:19,983 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 14:39:20,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-28 14:39:20,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-28 14:39:20,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-28 14:39:20,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-10-28 14:39:20,028 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2020-10-28 14:39:20,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:39:20,028 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-10-28 14:39:20,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 14:39:20,029 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-10-28 14:39:20,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-28 14:39:20,030 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:39:20,030 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:39:20,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 14:39:20,031 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:39:20,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:39:20,032 INFO L82 PathProgramCache]: Analyzing trace with hash -651701326, now seen corresponding path program 1 times [2020-10-28 14:39:20,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:39:20,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1245236290] [2020-10-28 14:39:20,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:39:20,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:20,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:20,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:20,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:20,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-28 14:39:20,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:39:20,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 367 [2020-10-28 14:39:20,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:20,420 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:20,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:39:20,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:39:20,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:39:20,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:39:20,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:39:20,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:20,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:20,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:20,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:39:20,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:20,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:39:20,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:20,483 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:20,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:39:20,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:39:20,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:39:20,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:20,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-28 14:39:20,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:20,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:20,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:20,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:39:20,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:20,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:39:20,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:20,496 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:20,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:39:20,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:39:20,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:39:20,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:20,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:39:20,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1245236290] [2020-10-28 14:39:20,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:39:20,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:39:20,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638839264] [2020-10-28 14:39:20,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:39:20,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:39:20,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:39:20,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:39:20,506 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 4 states. [2020-10-28 14:39:20,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:39:20,576 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-10-28 14:39:20,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:39:20,576 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-28 14:39:20,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:39:20,577 INFO L225 Difference]: With dead ends: 36 [2020-10-28 14:39:20,578 INFO L226 Difference]: Without dead ends: 23 [2020-10-28 14:39:20,579 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:39:20,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-28 14:39:20,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-10-28 14:39:20,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-28 14:39:20,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-10-28 14:39:20,587 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 19 [2020-10-28 14:39:20,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:39:20,587 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-10-28 14:39:20,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:39:20,587 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-10-28 14:39:20,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 14:39:20,588 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:39:20,588 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] [2020-10-28 14:39:20,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 14:39:20,589 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:39:20,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:39:20,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1404900848, now seen corresponding path program 1 times [2020-10-28 14:39:20,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:39:20,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [122904107] [2020-10-28 14:39:20,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:39:20,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:20,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:20,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:21,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:21,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 14:39:21,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:39:21,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 515 [2020-10-28 14:39:21,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:21,127 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:21,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 14:39:21,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:39:21,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 14:39:21,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:21,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:39:21,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:21,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:21,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:21,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:39:21,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:21,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:39:21,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:21,188 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:21,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:39:21,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:39:21,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:39:21,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:21,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-28 14:39:21,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:21,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:21,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:21,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:39:21,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:21,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:39:21,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:21,200 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:21,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:39:21,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:39:21,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:39:21,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:21,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:39:21,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [122904107] [2020-10-28 14:39:21,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:39:21,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 14:39:21,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637489922] [2020-10-28 14:39:21,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 14:39:21,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:39:21,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 14:39:21,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:39:21,207 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 5 states. [2020-10-28 14:39:21,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:39:21,284 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-10-28 14:39:21,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 14:39:21,284 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-10-28 14:39:21,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:39:21,285 INFO L225 Difference]: With dead ends: 38 [2020-10-28 14:39:21,286 INFO L226 Difference]: Without dead ends: 25 [2020-10-28 14:39:21,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:39:21,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-28 14:39:21,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-10-28 14:39:21,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-28 14:39:21,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-10-28 14:39:21,294 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 21 [2020-10-28 14:39:21,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:39:21,294 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-10-28 14:39:21,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 14:39:21,294 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-10-28 14:39:21,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 14:39:21,295 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:39:21,295 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:39:21,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 14:39:21,296 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:39:21,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:39:21,296 INFO L82 PathProgramCache]: Analyzing trace with hash 619831534, now seen corresponding path program 2 times [2020-10-28 14:39:21,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:39:21,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1086657064] [2020-10-28 14:39:21,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:39:21,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:21,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:21,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:21,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:21,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 14:39:21,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:39:21,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 519 [2020-10-28 14:39:21,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:21,837 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:21,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:39:21,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:39:21,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 14:39:21,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:21,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:39:21,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:21,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:21,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:21,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:39:21,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:21,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:39:21,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:21,903 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:21,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:39:21,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:39:21,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:39:21,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:39:21,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-28 14:39:21,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:21,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:21,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:21,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:39:21,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:21,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:39:21,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:21,914 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:21,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:39:21,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:39:21,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:39:21,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:21,917 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:39:21,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1086657064] [2020-10-28 14:39:21,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:39:21,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 14:39:21,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002087130] [2020-10-28 14:39:21,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 14:39:21,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:39:21,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 14:39:21,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:39:21,920 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 6 states. [2020-10-28 14:39:22,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:39:22,012 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-10-28 14:39:22,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 14:39:22,013 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-10-28 14:39:22,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:39:22,014 INFO L225 Difference]: With dead ends: 40 [2020-10-28 14:39:22,014 INFO L226 Difference]: Without dead ends: 27 [2020-10-28 14:39:22,015 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:39:22,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-28 14:39:22,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-10-28 14:39:22,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-28 14:39:22,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-10-28 14:39:22,021 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 23 [2020-10-28 14:39:22,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:39:22,022 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-10-28 14:39:22,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 14:39:22,022 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-10-28 14:39:22,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 14:39:22,023 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:39:22,023 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:39:22,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 14:39:22,024 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:39:22,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:39:22,024 INFO L82 PathProgramCache]: Analyzing trace with hash 767465548, now seen corresponding path program 3 times [2020-10-28 14:39:22,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:39:22,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1811997014] [2020-10-28 14:39:22,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:39:22,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:22,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:22,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:22,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:22,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 14:39:22,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:39:22,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 709 [2020-10-28 14:39:22,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:22,753 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:22,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 14:39:22,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:39:22,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 14:39:22,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:22,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:39:22,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:22,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:22,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:22,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:39:22,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:22,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:39:22,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:22,820 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:22,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:39:22,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:39:22,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:39:22,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:22,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-28 14:39:22,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:22,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:22,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:22,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:39:22,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:22,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:39:22,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:22,831 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:22,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:39:22,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:39:22,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:39:22,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:22,835 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:39:22,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1811997014] [2020-10-28 14:39:22,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:39:22,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 14:39:22,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936590353] [2020-10-28 14:39:22,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:39:22,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:39:22,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:39:22,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:39:22,838 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 7 states. [2020-10-28 14:39:22,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:39:22,927 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-10-28 14:39:22,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 14:39:22,928 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-10-28 14:39:22,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:39:22,929 INFO L225 Difference]: With dead ends: 42 [2020-10-28 14:39:22,929 INFO L226 Difference]: Without dead ends: 29 [2020-10-28 14:39:22,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:39:22,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-28 14:39:22,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-10-28 14:39:22,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-28 14:39:22,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-10-28 14:39:22,936 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 25 [2020-10-28 14:39:22,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:39:22,937 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-10-28 14:39:22,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:39:22,937 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-10-28 14:39:22,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 14:39:22,938 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:39:22,938 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:39:22,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 14:39:22,938 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:39:22,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:39:22,939 INFO L82 PathProgramCache]: Analyzing trace with hash 909832234, now seen corresponding path program 4 times [2020-10-28 14:39:22,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:39:22,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [12284781] [2020-10-28 14:39:22,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:39:22,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:22,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:23,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:24,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:24,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 14:39:24,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:39:24,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1259 [2020-10-28 14:39:24,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:24,218 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:24,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:39:24,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:39:24,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 14:39:24,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:24,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:39:24,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:24,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:24,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:24,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:39:24,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:24,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 14:39:24,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:24,315 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:24,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:39:24,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:39:24,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:39:24,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:24,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-28 14:39:24,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:24,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:24,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:24,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:39:24,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:24,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:39:24,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:24,329 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:24,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:39:24,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:39:24,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:39:24,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:24,346 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:39:24,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [12284781] [2020-10-28 14:39:24,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:39:24,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 14:39:24,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14577845] [2020-10-28 14:39:24,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:39:24,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:39:24,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:39:24,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:39:24,348 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 8 states. [2020-10-28 14:39:24,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:39:24,442 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2020-10-28 14:39:24,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 14:39:24,443 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-10-28 14:39:24,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:39:24,444 INFO L225 Difference]: With dead ends: 44 [2020-10-28 14:39:24,444 INFO L226 Difference]: Without dead ends: 31 [2020-10-28 14:39:24,445 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:39:24,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-28 14:39:24,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-10-28 14:39:24,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-28 14:39:24,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-10-28 14:39:24,450 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 27 [2020-10-28 14:39:24,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:39:24,451 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-10-28 14:39:24,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:39:24,451 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-10-28 14:39:24,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 14:39:24,452 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:39:24,452 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:39:24,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 14:39:24,452 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:39:24,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:39:24,453 INFO L82 PathProgramCache]: Analyzing trace with hash 285264008, now seen corresponding path program 5 times [2020-10-28 14:39:24,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:39:24,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [301231712] [2020-10-28 14:39:24,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:39:24,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:24,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:24,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:25,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:25,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 14:39:25,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:39:25,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1378 [2020-10-28 14:39:25,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:25,854 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:25,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:39:25,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-28 14:39:25,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 14:39:25,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:25,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:39:25,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:25,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:25,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:25,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:39:25,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:25,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:39:25,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:25,937 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:25,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:39:25,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:39:25,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:39:25,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:25,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-28 14:39:25,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:25,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:25,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:25,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:39:25,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:25,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:39:25,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:25,947 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:25,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:39:25,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:39:25,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:39:25,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:25,951 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-28 14:39:25,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [301231712] [2020-10-28 14:39:25,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:39:25,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 14:39:25,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10059692] [2020-10-28 14:39:25,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 14:39:25,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:39:25,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 14:39:25,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:39:25,953 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 6 states. [2020-10-28 14:39:26,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:39:26,039 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2020-10-28 14:39:26,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 14:39:26,040 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-10-28 14:39:26,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:39:26,041 INFO L225 Difference]: With dead ends: 41 [2020-10-28 14:39:26,041 INFO L226 Difference]: Without dead ends: 32 [2020-10-28 14:39:26,042 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:39:26,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-28 14:39:26,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-28 14:39:26,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-28 14:39:26,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-10-28 14:39:26,047 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 29 [2020-10-28 14:39:26,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:39:26,048 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-10-28 14:39:26,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 14:39:26,048 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-10-28 14:39:26,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 14:39:26,049 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:39:26,049 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:39:26,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 14:39:26,049 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:39:26,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:39:26,050 INFO L82 PathProgramCache]: Analyzing trace with hash 340877741, now seen corresponding path program 1 times [2020-10-28 14:39:26,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:39:26,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1620454586] [2020-10-28 14:39:26,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:39:26,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:26,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:26,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:27,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:27,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 14:39:27,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:39:27,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1542 [2020-10-28 14:39:27,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:27,613 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:27,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:39:27,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:39:27,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 14:39:27,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:27,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:39:27,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:27,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:27,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:27,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:39:27,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:27,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:39:27,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:27,704 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:27,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:39:27,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:39:27,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:39:27,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:27,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-28 14:39:27,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:27,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:27,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:27,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:39:27,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:27,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:39:27,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:27,713 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:27,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:39:27,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:39:27,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:39:27,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:27,717 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 14:39:27,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1620454586] [2020-10-28 14:39:27,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:39:27,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:39:27,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785999791] [2020-10-28 14:39:27,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:39:27,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:39:27,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:39:27,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:39:27,720 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 9 states. [2020-10-28 14:39:27,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:39:27,821 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2020-10-28 14:39:27,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 14:39:27,822 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-10-28 14:39:27,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:39:27,823 INFO L225 Difference]: With dead ends: 50 [2020-10-28 14:39:27,823 INFO L226 Difference]: Without dead ends: 35 [2020-10-28 14:39:27,824 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:39:27,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-28 14:39:27,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-10-28 14:39:27,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-28 14:39:27,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2020-10-28 14:39:27,830 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 31 [2020-10-28 14:39:27,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:39:27,830 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2020-10-28 14:39:27,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:39:27,831 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2020-10-28 14:39:27,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 14:39:27,832 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:39:27,832 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:39:27,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 14:39:27,832 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:39:27,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:39:27,833 INFO L82 PathProgramCache]: Analyzing trace with hash -308815093, now seen corresponding path program 2 times [2020-10-28 14:39:27,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:39:27,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [901710814] [2020-10-28 14:39:27,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:39:27,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:27,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:27,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:30,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:30,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 14:39:30,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:39:30,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2479 [2020-10-28 14:39:30,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:30,336 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:30,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:39:30,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:39:30,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 14:39:30,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:39:30,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:39:30,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:30,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:30,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:30,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:39:30,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:30,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:39:30,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:30,465 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:30,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:39:30,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:39:30,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:39:30,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:30,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-28 14:39:30,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:30,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:30,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:30,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:39:30,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:30,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:39:30,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:30,477 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:30,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:39:30,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:39:30,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:39:30,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:39:30,482 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 14:39:30,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [901710814] [2020-10-28 14:39:30,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:39:30,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:39:30,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158293170] [2020-10-28 14:39:30,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:39:30,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:39:30,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:39:30,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:39:30,492 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 10 states. [2020-10-28 14:39:30,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:39:30,624 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2020-10-28 14:39:30,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:39:30,625 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2020-10-28 14:39:30,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:39:30,626 INFO L225 Difference]: With dead ends: 52 [2020-10-28 14:39:30,627 INFO L226 Difference]: Without dead ends: 37 [2020-10-28 14:39:30,627 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:39:30,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-28 14:39:30,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-10-28 14:39:30,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-28 14:39:30,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-10-28 14:39:30,637 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 33 [2020-10-28 14:39:30,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:39:30,638 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-10-28 14:39:30,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:39:30,638 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-10-28 14:39:30,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:39:30,641 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:39:30,641 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:39:30,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 14:39:30,641 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:39:30,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:39:30,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1893370647, now seen corresponding path program 3 times [2020-10-28 14:39:30,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:39:30,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [436589956] [2020-10-28 14:39:30,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:39:30,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:30,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:30,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:33,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:33,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-28 14:39:33,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:39:33,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2660 [2020-10-28 14:39:33,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:33,330 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:33,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 14:39:33,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-28 14:39:33,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 14:39:33,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:33,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:39:33,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:33,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:33,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:33,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:39:33,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:33,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 14:39:33,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:33,460 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:33,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:39:33,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:39:33,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:39:33,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 14:39:33,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-28 14:39:33,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:33,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:33,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:33,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:39:33,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:33,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:39:33,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:33,473 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:33,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:39:33,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:39:33,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:39:33,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:33,477 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-28 14:39:33,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [436589956] [2020-10-28 14:39:33,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:39:33,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 14:39:33,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653125224] [2020-10-28 14:39:33,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:39:33,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:39:33,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:39:33,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:39:33,480 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 7 states. [2020-10-28 14:39:33,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:39:33,585 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2020-10-28 14:39:33,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 14:39:33,586 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2020-10-28 14:39:33,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:39:33,587 INFO L225 Difference]: With dead ends: 47 [2020-10-28 14:39:33,587 INFO L226 Difference]: Without dead ends: 38 [2020-10-28 14:39:33,588 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:39:33,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-28 14:39:33,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-28 14:39:33,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-28 14:39:33,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-10-28 14:39:33,593 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 35 [2020-10-28 14:39:33,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:39:33,593 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-10-28 14:39:33,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:39:33,594 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-10-28 14:39:33,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-28 14:39:33,594 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:39:33,595 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:39:33,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 14:39:33,595 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:39:33,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:39:33,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1677952562, now seen corresponding path program 4 times [2020-10-28 14:39:33,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:39:33,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1269614046] [2020-10-28 14:39:33,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:39:33,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:33,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:33,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:36,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:36,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-28 14:39:36,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:39:36,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3171 [2020-10-28 14:39:36,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:36,791 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:36,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:39:36,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:39:36,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:39:36,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:39:36,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:39:36,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:36,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:36,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:36,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:39:36,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:36,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:39:36,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:36,954 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:36,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:39:36,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:39:36,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:39:36,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:39:36,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-28 14:39:36,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:36,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:36,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:36,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:39:36,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:36,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:39:36,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:36,966 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:36,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:39:36,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:39:36,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:39:36,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:36,972 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 14:39:36,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1269614046] [2020-10-28 14:39:36,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:39:36,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:39:36,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838184206] [2020-10-28 14:39:36,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:39:36,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:39:36,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:39:36,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:39:36,974 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 11 states. [2020-10-28 14:39:37,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:39:37,099 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2020-10-28 14:39:37,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:39:37,100 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-10-28 14:39:37,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:39:37,100 INFO L225 Difference]: With dead ends: 58 [2020-10-28 14:39:37,101 INFO L226 Difference]: Without dead ends: 41 [2020-10-28 14:39:37,102 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:39:37,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-28 14:39:37,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-10-28 14:39:37,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-28 14:39:37,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2020-10-28 14:39:37,111 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 37 [2020-10-28 14:39:37,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:39:37,111 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2020-10-28 14:39:37,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:39:37,112 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2020-10-28 14:39:37,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-28 14:39:37,114 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:39:37,114 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:39:37,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 14:39:37,115 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:39:37,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:39:37,116 INFO L82 PathProgramCache]: Analyzing trace with hash 659420332, now seen corresponding path program 5 times [2020-10-28 14:39:37,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:39:37,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [633760284] [2020-10-28 14:39:37,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:39:37,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:37,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:37,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:40,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:40,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 14:39:40,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:39:40,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3613 [2020-10-28 14:39:40,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:40,758 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:40,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:39:40,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 14:39:40,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 14:39:40,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:40,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:39:40,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:40,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:40,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:40,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:39:40,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:40,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:39:40,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:40,872 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:40,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:39:40,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:39:40,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:39:40,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:40,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-28 14:39:40,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:40,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:40,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:40,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:39:40,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:40,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:39:40,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:40,881 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:40,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:39:40,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:39:40,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:39:40,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:40,886 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-28 14:39:40,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [633760284] [2020-10-28 14:39:40,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:39:40,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 14:39:40,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573761029] [2020-10-28 14:39:40,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:39:40,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:39:40,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:39:40,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:39:40,888 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 8 states. [2020-10-28 14:39:41,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:39:41,013 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2020-10-28 14:39:41,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:39:41,013 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 39 [2020-10-28 14:39:41,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:39:41,014 INFO L225 Difference]: With dead ends: 51 [2020-10-28 14:39:41,014 INFO L226 Difference]: Without dead ends: 42 [2020-10-28 14:39:41,015 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:39:41,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-28 14:39:41,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-28 14:39:41,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-28 14:39:41,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-10-28 14:39:41,020 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 39 [2020-10-28 14:39:41,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:39:41,021 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-10-28 14:39:41,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:39:41,021 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-10-28 14:39:41,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 14:39:41,022 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:39:41,022 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:39:41,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 14:39:41,022 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:39:41,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:39:41,023 INFO L82 PathProgramCache]: Analyzing trace with hash -872147759, now seen corresponding path program 6 times [2020-10-28 14:39:41,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:39:41,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [931473203] [2020-10-28 14:39:41,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:39:41,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:41,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:41,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:44,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:44,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-28 14:39:44,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:39:44,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3883 [2020-10-28 14:39:44,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:44,930 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:44,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:39:44,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:39:44,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 14:39:44,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:45,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:39:45,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:45,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:45,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:45,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:39:45,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:45,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:39:45,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:45,067 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:45,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:39:45,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:39:45,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:39:45,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:45,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-28 14:39:45,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:45,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:45,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:45,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:39:45,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:45,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:39:45,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:45,077 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:45,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:39:45,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:39:45,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:39:45,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:45,086 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-28 14:39:45,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [931473203] [2020-10-28 14:39:45,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:39:45,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:39:45,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955061049] [2020-10-28 14:39:45,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:39:45,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:39:45,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:39:45,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:39:45,089 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 12 states. [2020-10-28 14:39:45,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:39:45,207 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2020-10-28 14:39:45,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 14:39:45,207 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 41 [2020-10-28 14:39:45,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:39:45,208 INFO L225 Difference]: With dead ends: 64 [2020-10-28 14:39:45,208 INFO L226 Difference]: Without dead ends: 45 [2020-10-28 14:39:45,209 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:39:45,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-28 14:39:45,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-10-28 14:39:45,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-28 14:39:45,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2020-10-28 14:39:45,221 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 41 [2020-10-28 14:39:45,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:39:45,222 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2020-10-28 14:39:45,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:39:45,222 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2020-10-28 14:39:45,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-28 14:39:45,223 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:39:45,223 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:39:45,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 14:39:45,223 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:39:45,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:39:45,224 INFO L82 PathProgramCache]: Analyzing trace with hash 172028079, now seen corresponding path program 7 times [2020-10-28 14:39:45,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:39:45,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1023409467] [2020-10-28 14:39:45,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:39:45,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:45,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:45,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:49,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:49,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-28 14:39:49,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:39:49,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4132 [2020-10-28 14:39:49,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:49,381 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:49,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:39:49,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:39:49,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 14:39:49,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:49,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:39:49,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:49,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:49,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:49,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:39:49,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:49,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:39:49,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:49,529 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:49,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:39:49,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:39:49,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:39:49,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:49,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-28 14:39:49,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:49,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:49,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:49,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:39:49,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:49,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:39:49,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:49,536 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:49,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:39:49,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:39:49,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:39:49,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:49,542 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-28 14:39:49,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1023409467] [2020-10-28 14:39:49,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:39:49,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:39:49,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530155075] [2020-10-28 14:39:49,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:39:49,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:39:49,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:39:49,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:39:49,546 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 13 states. [2020-10-28 14:39:49,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:39:49,646 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2020-10-28 14:39:49,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 14:39:49,646 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 43 [2020-10-28 14:39:49,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:39:49,648 INFO L225 Difference]: With dead ends: 65 [2020-10-28 14:39:49,648 INFO L226 Difference]: Without dead ends: 46 [2020-10-28 14:39:49,649 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:39:49,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-28 14:39:49,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-28 14:39:49,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-28 14:39:49,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2020-10-28 14:39:49,658 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 43 [2020-10-28 14:39:49,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:39:49,661 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2020-10-28 14:39:49,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:39:49,661 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2020-10-28 14:39:49,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 14:39:49,663 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:39:49,664 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:39:49,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 14:39:49,664 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:39:49,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:39:49,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1397338867, now seen corresponding path program 8 times [2020-10-28 14:39:49,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:39:49,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1963325911] [2020-10-28 14:39:49,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:39:49,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:49,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:50,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:50,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-28 14:39:50,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:50,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 650 [2020-10-28 14:39:50,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:50,431 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:50,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:39:50,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 14:39:50,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 14:39:50,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:50,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:39:50,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:50,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:50,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:50,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:39:50,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:50,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:39:50,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:50,563 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:50,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:39:50,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:39:50,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:39:50,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:50,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-28 14:39:50,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:50,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:50,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:50,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:39:50,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:50,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:39:50,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:50,570 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:50,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:39:50,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:39:50,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:39:50,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:50,583 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-28 14:39:50,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1963325911] [2020-10-28 14:39:50,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:39:50,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:39:50,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292708826] [2020-10-28 14:39:50,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:39:50,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:39:50,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:39:50,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:39:50,586 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 9 states. [2020-10-28 14:39:50,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:39:50,756 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2020-10-28 14:39:50,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 14:39:50,756 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 45 [2020-10-28 14:39:50,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:39:50,757 INFO L225 Difference]: With dead ends: 57 [2020-10-28 14:39:50,757 INFO L226 Difference]: Without dead ends: 48 [2020-10-28 14:39:50,758 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:39:50,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-28 14:39:50,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-10-28 14:39:50,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-28 14:39:50,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-10-28 14:39:50,763 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 45 [2020-10-28 14:39:50,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:39:50,763 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-10-28 14:39:50,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:39:50,763 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-10-28 14:39:50,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-28 14:39:50,764 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:39:50,764 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:39:50,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 14:39:50,765 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:39:50,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:39:50,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1732781838, now seen corresponding path program 9 times [2020-10-28 14:39:50,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:39:50,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1037120724] [2020-10-28 14:39:50,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:39:50,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:50,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:51,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:51,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 14:39:51,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:51,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 692 [2020-10-28 14:39:51,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:51,537 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:51,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:39:51,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 14:39:51,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 14:39:51,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:51,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:39:51,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:51,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:51,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:51,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:39:51,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:51,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:39:51,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:51,685 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:51,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:39:51,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:39:51,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:39:51,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:51,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-28 14:39:51,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:51,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:51,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:51,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:39:51,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:51,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:39:51,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:51,694 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:51,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:39:51,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:39:51,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:39:51,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:51,702 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-28 14:39:51,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1037120724] [2020-10-28 14:39:51,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:39:51,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:39:51,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611497440] [2020-10-28 14:39:51,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:39:51,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:39:51,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:39:51,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:39:51,708 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 10 states. [2020-10-28 14:39:51,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:39:51,916 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2020-10-28 14:39:51,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 14:39:51,917 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 47 [2020-10-28 14:39:51,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:39:51,918 INFO L225 Difference]: With dead ends: 59 [2020-10-28 14:39:51,918 INFO L226 Difference]: Without dead ends: 50 [2020-10-28 14:39:51,919 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:39:51,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-28 14:39:51,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-28 14:39:51,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-28 14:39:51,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2020-10-28 14:39:51,924 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 47 [2020-10-28 14:39:51,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:39:51,925 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2020-10-28 14:39:51,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:39:51,925 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2020-10-28 14:39:51,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-28 14:39:51,926 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:39:51,926 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:39:51,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 14:39:51,926 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:39:51,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:39:51,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1970929769, now seen corresponding path program 10 times [2020-10-28 14:39:51,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:39:51,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1233875103] [2020-10-28 14:39:51,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:39:52,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:52,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:52,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:52,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 14:39:52,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:52,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 743 [2020-10-28 14:39:52,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:52,781 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:52,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:39:52,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 14:39:52,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 14:39:52,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:52,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:39:52,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:52,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:52,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:52,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:39:52,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:52,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:39:52,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:52,922 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:52,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:39:52,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:39:52,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:39:52,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:52,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-28 14:39:52,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:52,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:52,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:52,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:39:52,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:52,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:39:52,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:52,930 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:52,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:39:52,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:39:52,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:39:52,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:52,937 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-28 14:39:52,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1233875103] [2020-10-28 14:39:52,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:39:52,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:39:52,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006677996] [2020-10-28 14:39:52,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:39:52,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:39:52,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:39:52,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:39:52,939 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 11 states. [2020-10-28 14:39:53,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:39:53,166 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-10-28 14:39:53,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 14:39:53,166 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2020-10-28 14:39:53,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:39:53,167 INFO L225 Difference]: With dead ends: 61 [2020-10-28 14:39:53,167 INFO L226 Difference]: Without dead ends: 52 [2020-10-28 14:39:53,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:39:53,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-28 14:39:53,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-28 14:39:53,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-28 14:39:53,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2020-10-28 14:39:53,172 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 49 [2020-10-28 14:39:53,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:39:53,173 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2020-10-28 14:39:53,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:39:53,173 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2020-10-28 14:39:53,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-28 14:39:53,173 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:39:53,174 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:39:53,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 14:39:53,174 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:39:53,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:39:53,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1097142524, now seen corresponding path program 11 times [2020-10-28 14:39:53,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:39:53,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1815371198] [2020-10-28 14:39:53,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:39:53,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:53,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:54,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:54,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-28 14:39:54,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:54,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 817 [2020-10-28 14:39:54,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:54,080 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:54,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:39:54,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 14:39:54,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:39:54,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:54,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:39:54,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:54,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:54,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:54,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:39:54,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:54,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:39:54,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:54,248 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:54,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:39:54,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:39:54,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:39:54,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:54,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-28 14:39:54,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:54,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:54,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:54,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:39:54,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:54,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:39:54,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:54,256 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:54,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:39:54,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:39:54,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:39:54,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:54,263 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-28 14:39:54,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1815371198] [2020-10-28 14:39:54,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:39:54,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:39:54,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976720149] [2020-10-28 14:39:54,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:39:54,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:39:54,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:39:54,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:39:54,265 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 12 states. [2020-10-28 14:39:54,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:39:54,512 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2020-10-28 14:39:54,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 14:39:54,513 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 51 [2020-10-28 14:39:54,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:39:54,514 INFO L225 Difference]: With dead ends: 63 [2020-10-28 14:39:54,514 INFO L226 Difference]: Without dead ends: 54 [2020-10-28 14:39:54,515 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-10-28 14:39:54,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-28 14:39:54,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-28 14:39:54,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-28 14:39:54,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-10-28 14:39:54,520 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 51 [2020-10-28 14:39:54,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:39:54,520 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-10-28 14:39:54,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:39:54,520 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-10-28 14:39:54,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-28 14:39:54,521 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:39:54,521 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:39:54,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 14:39:54,521 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:39:54,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:39:54,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1127916255, now seen corresponding path program 12 times [2020-10-28 14:39:54,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:39:54,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [485451722] [2020-10-28 14:39:54,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:39:54,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:54,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:55,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:55,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 14:39:55,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:55,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 875 [2020-10-28 14:39:55,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:55,482 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:55,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:39:55,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 14:39:55,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 14:39:55,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:55,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:39:55,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:55,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:55,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:55,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:39:55,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:55,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:39:55,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:55,658 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:55,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:39:55,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:39:55,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:39:55,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:55,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-28 14:39:55,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:55,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:55,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:55,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:39:55,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:55,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:39:55,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:55,666 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:55,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:39:55,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:39:55,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:39:55,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:55,674 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-28 14:39:55,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [485451722] [2020-10-28 14:39:55,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:39:55,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:39:55,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328671666] [2020-10-28 14:39:55,676 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:39:55,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:39:55,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:39:55,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:39:55,677 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 13 states. [2020-10-28 14:39:56,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:39:56,016 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2020-10-28 14:39:56,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 14:39:56,017 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 53 [2020-10-28 14:39:56,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:39:56,018 INFO L225 Difference]: With dead ends: 65 [2020-10-28 14:39:56,018 INFO L226 Difference]: Without dead ends: 56 [2020-10-28 14:39:56,019 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:39:56,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-28 14:39:56,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-28 14:39:56,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-28 14:39:56,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2020-10-28 14:39:56,025 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 53 [2020-10-28 14:39:56,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:39:56,025 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2020-10-28 14:39:56,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:39:56,025 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2020-10-28 14:39:56,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-28 14:39:56,026 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:39:56,026 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:39:56,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 14:39:56,026 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:39:56,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:39:56,027 INFO L82 PathProgramCache]: Analyzing trace with hash -515689466, now seen corresponding path program 13 times [2020-10-28 14:39:56,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:39:56,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [393602491] [2020-10-28 14:39:56,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:39:56,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:56,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:57,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:57,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 14:39:57,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:57,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 989 [2020-10-28 14:39:57,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:57,124 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:57,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:39:57,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 14:39:57,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 14:39:57,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:57,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:39:57,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:57,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:57,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:57,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:39:57,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:57,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:39:57,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:57,365 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:57,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:39:57,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:39:57,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:39:57,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:57,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-28 14:39:57,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:57,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:57,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:57,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:39:57,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:57,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:39:57,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:57,372 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:57,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:39:57,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:39:57,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:39:57,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:57,381 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-28 14:39:57,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [393602491] [2020-10-28 14:39:57,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:39:57,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:39:57,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950679747] [2020-10-28 14:39:57,382 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:39:57,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:39:57,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:39:57,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:39:57,383 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 14 states. [2020-10-28 14:39:57,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:39:57,755 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-10-28 14:39:57,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 14:39:57,756 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 55 [2020-10-28 14:39:57,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:39:57,757 INFO L225 Difference]: With dead ends: 67 [2020-10-28 14:39:57,757 INFO L226 Difference]: Without dead ends: 58 [2020-10-28 14:39:57,758 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:39:57,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-28 14:39:57,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-28 14:39:57,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-28 14:39:57,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2020-10-28 14:39:57,764 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 55 [2020-10-28 14:39:57,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:39:57,764 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2020-10-28 14:39:57,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:39:57,764 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2020-10-28 14:39:57,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 14:39:57,765 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:39:57,765 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:39:57,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 14:39:57,765 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:39:57,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:39:57,766 INFO L82 PathProgramCache]: Analyzing trace with hash -576264789, now seen corresponding path program 14 times [2020-10-28 14:39:57,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:39:57,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1194622225] [2020-10-28 14:39:57,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:39:57,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:58,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:59,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:59,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 14:39:59,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:59,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1200 [2020-10-28 14:39:59,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:59,125 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:59,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:39:59,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 14:39:59,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 14:39:59,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:59,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:39:59,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:59,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:59,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:59,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:39:59,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:59,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:39:59,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:59,355 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:59,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:39:59,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:39:59,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:39:59,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:59,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-28 14:39:59,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:59,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:59,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:59,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:39:59,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:59,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:39:59,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:59,364 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:59,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:39:59,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:39:59,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:39:59,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:59,375 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-28 14:39:59,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1194622225] [2020-10-28 14:39:59,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:39:59,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:39:59,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573616995] [2020-10-28 14:39:59,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:39:59,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:39:59,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:39:59,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:39:59,379 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 15 states. [2020-10-28 14:39:59,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:39:59,850 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2020-10-28 14:39:59,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 14:39:59,851 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2020-10-28 14:39:59,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:39:59,852 INFO L225 Difference]: With dead ends: 69 [2020-10-28 14:39:59,852 INFO L226 Difference]: Without dead ends: 60 [2020-10-28 14:39:59,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=202, Invalid=398, Unknown=0, NotChecked=0, Total=600 [2020-10-28 14:39:59,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-28 14:39:59,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-10-28 14:39:59,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-28 14:39:59,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-10-28 14:39:59,859 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 57 [2020-10-28 14:39:59,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:39:59,860 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-10-28 14:39:59,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:39:59,860 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-10-28 14:39:59,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 14:39:59,867 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:39:59,868 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:39:59,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 14:39:59,868 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:39:59,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:39:59,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1340391952, now seen corresponding path program 15 times [2020-10-28 14:39:59,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:39:59,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [558897768] [2020-10-28 14:39:59,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:39:59,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-28 14:39:59,951 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-28 14:39:59,951 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-28 14:39:59,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 14:40:00,004 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 02:40:00 BoogieIcfgContainer [2020-10-28 14:40:00,004 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-28 14:40:00,010 INFO L168 Benchmark]: Toolchain (without parser) took 42150.76 ms. Allocated memory was 154.1 MB in the beginning and 811.6 MB in the end (delta: 657.5 MB). Free memory was 129.8 MB in the beginning and 768.0 MB in the end (delta: -638.2 MB). Peak memory consumption was 20.6 MB. Max. memory is 8.0 GB. [2020-10-28 14:40:00,017 INFO L168 Benchmark]: CDTParser took 0.71 ms. Allocated memory is still 154.1 MB. Free memory was 125.8 MB in the beginning and 125.7 MB in the end (delta: 74.6 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-28 14:40:00,017 INFO L168 Benchmark]: CACSL2BoogieTranslator took 324.26 ms. Allocated memory is still 154.1 MB. Free memory was 129.1 MB in the beginning and 119.2 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-28 14:40:00,018 INFO L168 Benchmark]: Boogie Preprocessor took 46.12 ms. Allocated memory is still 154.1 MB. Free memory was 119.2 MB in the beginning and 117.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-28 14:40:00,019 INFO L168 Benchmark]: RCFGBuilder took 664.23 ms. Allocated memory is still 154.1 MB. Free memory was 117.4 MB in the beginning and 132.6 MB in the end (delta: -15.2 MB). Peak memory consumption was 15.4 MB. Max. memory is 8.0 GB. [2020-10-28 14:40:00,020 INFO L168 Benchmark]: TraceAbstraction took 41096.97 ms. Allocated memory was 154.1 MB in the beginning and 811.6 MB in the end (delta: 657.5 MB). Free memory was 132.0 MB in the beginning and 768.0 MB in the end (delta: -636.0 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2020-10-28 14:40:00,025 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.71 ms. Allocated memory is still 154.1 MB. Free memory was 125.8 MB in the beginning and 125.7 MB in the end (delta: 74.6 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 324.26 ms. Allocated memory is still 154.1 MB. Free memory was 129.1 MB in the beginning and 119.2 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 46.12 ms. Allocated memory is still 154.1 MB. Free memory was 119.2 MB in the beginning and 117.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 664.23 ms. Allocated memory is still 154.1 MB. Free memory was 117.4 MB in the beginning and 132.6 MB in the end (delta: -15.2 MB). Peak memory consumption was 15.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 41096.97 ms. Allocated memory was 154.1 MB in the beginning and 811.6 MB in the end (delta: 657.5 MB). Free memory was 132.0 MB in the beginning and 768.0 MB in the end (delta: -636.0 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L21] struct cont cont; [L22] struct dummy array[10]; [L23] int i, *pa; [L24] i = __VERIFIER_nondet_int() [L26] int j = 0; [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ [L26] COND FALSE !(j < 10) [L31] COND TRUE i >= 0 && i < 9 [L32] cont.array = &array[i] [L33] EXPR cont.array [L33] pa = &cont.array[0].b [L34] EXPR cont.array [L34] EXPR cont.array[0].b [L34] COND TRUE cont.array[0].b > 0 [L35] EXPR array[i].b [L35] i = array[i].b - 10 [L36] EXPR \read(*pa) [L36] COND TRUE i < *pa [L37] ++i [L36] EXPR \read(*pa) [L36] COND TRUE i < *pa [L37] ++i [L36] EXPR \read(*pa) [L36] COND TRUE i < *pa [L37] ++i [L36] EXPR \read(*pa) [L36] COND TRUE i < *pa [L37] ++i [L36] EXPR \read(*pa) [L36] COND TRUE i < *pa [L37] ++i [L36] EXPR \read(*pa) [L36] COND TRUE i < *pa [L37] ++i [L36] EXPR \read(*pa) [L36] COND TRUE i < *pa [L37] ++i [L36] EXPR \read(*pa) [L36] COND TRUE i < *pa [L37] ++i [L36] EXPR \read(*pa) [L36] COND TRUE i < *pa [L37] ++i [L36] EXPR \read(*pa) [L36] COND TRUE i < *pa [L37] ++i [L36] EXPR \read(*pa) [L36] COND FALSE !(i < *pa) [L39] CALL, EXPR check(&cont, i) [L16] EXPR pc->array [L16] EXPR pc->array[1].b [L16] return pc->array[1].b == i; [L39] RET, EXPR check(&cont, i) [L39] COND TRUE !check(&cont, i) [L47] CALL reach_error() [L3] __assert_fail("0", "test25-1.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 40.9s, OverallIterations: 22, TraceHistogramMax: 11, AutomataDifference: 3.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 377 SDtfs, 173 SDslu, 1448 SDs, 0 SdLazy, 1420 SolverSat, 85 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 311 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 2.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=60occurred in iteration=21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 21 MinimizatonAttempts, 9 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 35.6s InterpolantComputationTime, 837 NumberOfCodeBlocks, 837 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 757 ConstructedInterpolants, 0 QuantifiedInterpolants, 106865 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 21 InterpolantComputations, 3 PerfectInterpolantSequences, 872/1487 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...