/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/loop-acceleration/array_3-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:29:19,167 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:29:19,172 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:29:19,215 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:29:19,215 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:29:19,217 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:29:19,219 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:29:19,221 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:29:19,224 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:29:19,225 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:29:19,226 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:29:19,228 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:29:19,228 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:29:19,230 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:29:19,231 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:29:19,232 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:29:19,234 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:29:19,235 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:29:19,254 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:29:19,259 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:29:19,263 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:29:19,265 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:29:19,268 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:29:19,269 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:29:19,276 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:29:19,279 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:29:19,280 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:29:19,281 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:29:19,282 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:29:19,287 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:29:19,287 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:29:19,288 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:29:19,290 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:29:19,291 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:29:19,293 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:29:19,293 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:29:19,294 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:29:19,294 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:29:19,294 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:29:19,295 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:29:19,296 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:29:19,297 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 01:29:19,360 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:29:19,360 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:29:19,365 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:29:19,365 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:29:19,365 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:29:19,366 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:29:19,366 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:29:19,367 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:29:19,367 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:29:19,367 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:29:19,368 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:29:19,369 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:29:19,369 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:29:19,369 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:29:19,369 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:29:19,369 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:29:19,370 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:29:19,370 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:29:19,370 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:29:19,371 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:29:19,371 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:29:19,371 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:29:19,371 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:29:19,371 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:29:19,372 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:29:19,372 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:29:19,372 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:29:19,372 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:29:19,372 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:29:19,373 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:29:19,836 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:29:19,869 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:29:19,873 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:29:19,875 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:29:19,876 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:29:19,878 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_3-1.i [2020-10-27 01:29:19,962 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a21e387e4/c35616830f434fac98270ed5b3ebdf9f/FLAGd8b46a7a9 [2020-10-27 01:29:20,698 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:29:20,698 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/array_3-1.i [2020-10-27 01:29:20,707 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a21e387e4/c35616830f434fac98270ed5b3ebdf9f/FLAGd8b46a7a9 [2020-10-27 01:29:21,026 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a21e387e4/c35616830f434fac98270ed5b3ebdf9f [2020-10-27 01:29:21,031 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:29:21,038 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:29:21,040 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:29:21,040 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:29:21,044 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:29:21,046 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:29:21" (1/1) ... [2020-10-27 01:29:21,049 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@329de2bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:29:21, skipping insertion in model container [2020-10-27 01:29:21,050 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:29:21" (1/1) ... [2020-10-27 01:29:21,059 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:29:21,076 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:29:21,249 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:29:21,259 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:29:21,280 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:29:21,298 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:29:21,298 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:29:21 WrapperNode [2020-10-27 01:29:21,299 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:29:21,300 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:29:21,300 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:29:21,300 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:29:21,314 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:29:21" (1/1) ... [2020-10-27 01:29:21,314 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:29:21" (1/1) ... [2020-10-27 01:29:21,322 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:29:21" (1/1) ... [2020-10-27 01:29:21,323 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:29:21" (1/1) ... [2020-10-27 01:29:21,330 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:29:21" (1/1) ... [2020-10-27 01:29:21,335 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:29:21" (1/1) ... [2020-10-27 01:29:21,337 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:29:21" (1/1) ... [2020-10-27 01:29:21,339 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:29:21,340 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:29:21,340 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:29:21,340 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:29:21,341 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:29:21" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:29:21,419 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:29:21,419 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:29:21,420 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:29:21,420 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 01:29:21,420 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:29:21,420 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:29:21,420 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:29:21,420 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 01:29:21,421 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 01:29:21,421 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:29:21,421 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:29:21,421 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 01:29:21,421 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 01:29:21,421 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:29:21,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:29:21,422 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:29:21,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:29:21,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:29:21,422 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:29:21,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:29:21,877 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:29:21,878 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-27 01:29:21,880 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:29:21 BoogieIcfgContainer [2020-10-27 01:29:21,880 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:29:21,883 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:29:21,884 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:29:21,888 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:29:21,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:29:21" (1/3) ... [2020-10-27 01:29:21,889 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d9e887 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:29:21, skipping insertion in model container [2020-10-27 01:29:21,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:29:21" (2/3) ... [2020-10-27 01:29:21,890 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d9e887 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:29:21, skipping insertion in model container [2020-10-27 01:29:21,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:29:21" (3/3) ... [2020-10-27 01:29:21,893 INFO L111 eAbstractionObserver]: Analyzing ICFG array_3-1.i [2020-10-27 01:29:21,927 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:29:21,932 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:29:21,949 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:29:21,998 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:29:21,998 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:29:21,998 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:29:21,998 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:29:21,999 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:29:21,999 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:29:21,999 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:29:21,999 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:29:22,023 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-10-27 01:29:22,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-27 01:29:22,033 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:29:22,034 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:29:22,035 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:29:22,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:29:22,047 INFO L82 PathProgramCache]: Analyzing trace with hash 174536931, now seen corresponding path program 1 times [2020-10-27 01:29:22,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:29:22,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [692223945] [2020-10-27 01:29:22,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:29:22,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:22,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:22,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:22,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:22,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:22,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 01:29:22,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:29:22,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 407 [2020-10-27 01:29:22,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:22,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:29:22,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:29:22,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:29:22,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 01:29:22,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:29:22,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:22,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:22,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:22,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:29:22,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:29:22,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-27 01:29:22,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:22,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:29:22,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:29:22,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:29:22,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:22,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:29:22,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [692223945] [2020-10-27 01:29:22,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:29:22,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 01:29:22,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514495555] [2020-10-27 01:29:22,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 01:29:22,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:29:22,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 01:29:22,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 01:29:22,893 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 3 states. [2020-10-27 01:29:22,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:29:22,978 INFO L93 Difference]: Finished difference Result 49 states and 61 transitions. [2020-10-27 01:29:22,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 01:29:22,980 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-10-27 01:29:22,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:29:22,989 INFO L225 Difference]: With dead ends: 49 [2020-10-27 01:29:22,989 INFO L226 Difference]: Without dead ends: 20 [2020-10-27 01:29:22,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 01:29:23,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-27 01:29:23,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-27 01:29:23,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-27 01:29:23,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-10-27 01:29:23,036 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 15 [2020-10-27 01:29:23,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:29:23,036 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-10-27 01:29:23,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 01:29:23,037 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-10-27 01:29:23,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 01:29:23,038 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:29:23,038 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:29:23,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:29:23,038 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:29:23,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:29:23,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1346698167, now seen corresponding path program 1 times [2020-10-27 01:29:23,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:29:23,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2024080489] [2020-10-27 01:29:23,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:29:23,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:23,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:23,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:23,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:23,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 01:29:23,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:29:23,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 243 [2020-10-27 01:29:23,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:23,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:29:23,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:29:23,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 01:29:23,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:29:23,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:29:23,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:23,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:23,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:23,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:29:23,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:29:23,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 01:29:23,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:23,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:29:23,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:29:23,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:29:23,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 01:29:23,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:29:23,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2024080489] [2020-10-27 01:29:23,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:29:23,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:29:23,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770898343] [2020-10-27 01:29:23,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:29:23,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:29:23,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:29:23,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:29:23,413 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 4 states. [2020-10-27 01:29:23,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:29:23,491 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2020-10-27 01:29:23,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:29:23,492 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-27 01:29:23,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:29:23,495 INFO L225 Difference]: With dead ends: 39 [2020-10-27 01:29:23,495 INFO L226 Difference]: Without dead ends: 27 [2020-10-27 01:29:23,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:29:23,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-27 01:29:23,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2020-10-27 01:29:23,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-27 01:29:23,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2020-10-27 01:29:23,506 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 16 [2020-10-27 01:29:23,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:29:23,507 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2020-10-27 01:29:23,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:29:23,507 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2020-10-27 01:29:23,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 01:29:23,508 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:29:23,508 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:29:23,509 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:29:23,509 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:29:23,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:29:23,510 INFO L82 PathProgramCache]: Analyzing trace with hash 261615961, now seen corresponding path program 1 times [2020-10-27 01:29:23,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:29:23,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [228202322] [2020-10-27 01:29:23,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:29:23,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:23,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:23,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:23,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:23,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 01:29:23,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:29:23,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 226 [2020-10-27 01:29:23,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:23,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:29:23,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:29:23,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 01:29:23,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:23,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:29:23,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:23,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:23,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:23,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:29:23,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:29:23,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:29:23,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:23,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:29:23,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:29:23,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:29:23,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:23,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:29:23,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [228202322] [2020-10-27 01:29:23,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:29:23,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 01:29:23,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093559068] [2020-10-27 01:29:23,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:29:23,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:29:23,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:29:23,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:29:23,834 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 5 states. [2020-10-27 01:29:23,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:29:23,930 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2020-10-27 01:29:23,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:29:23,931 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-10-27 01:29:23,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:29:23,932 INFO L225 Difference]: With dead ends: 49 [2020-10-27 01:29:23,932 INFO L226 Difference]: Without dead ends: 34 [2020-10-27 01:29:23,933 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:29:23,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-27 01:29:23,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2020-10-27 01:29:23,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-27 01:29:23,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-10-27 01:29:23,942 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 18 [2020-10-27 01:29:23,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:29:23,942 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-10-27 01:29:23,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:29:23,943 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-10-27 01:29:23,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 01:29:23,944 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:29:23,944 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:29:23,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:29:23,944 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:29:23,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:29:23,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1174668923, now seen corresponding path program 2 times [2020-10-27 01:29:23,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:29:23,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1084867503] [2020-10-27 01:29:23,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:29:23,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:23,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:23,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:24,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:24,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 01:29:24,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:29:24,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 353 [2020-10-27 01:29:24,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:24,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:29:24,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:29:24,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:29:24,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:24,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:29:24,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:24,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:24,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:24,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:29:24,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:29:24,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:29:24,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:24,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:29:24,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:29:24,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:29:24,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:24,381 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:29:24,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1084867503] [2020-10-27 01:29:24,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:29:24,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 01:29:24,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358988757] [2020-10-27 01:29:24,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:29:24,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:29:24,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:29:24,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:29:24,385 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 6 states. [2020-10-27 01:29:24,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:29:24,496 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2020-10-27 01:29:24,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:29:24,497 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-27 01:29:24,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:29:24,498 INFO L225 Difference]: With dead ends: 60 [2020-10-27 01:29:24,498 INFO L226 Difference]: Without dead ends: 41 [2020-10-27 01:29:24,499 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:29:24,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-27 01:29:24,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2020-10-27 01:29:24,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-27 01:29:24,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2020-10-27 01:29:24,508 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 20 [2020-10-27 01:29:24,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:29:24,509 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2020-10-27 01:29:24,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:29:24,509 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2020-10-27 01:29:24,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 01:29:24,510 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:29:24,511 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:29:24,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:29:24,511 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:29:24,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:29:24,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1849730275, now seen corresponding path program 3 times [2020-10-27 01:29:24,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:29:24,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1111907298] [2020-10-27 01:29:24,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:29:24,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:24,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:24,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:24,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:24,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 01:29:24,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:29:24,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 295 [2020-10-27 01:29:24,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:24,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:29:24,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:29:24,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:29:24,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:24,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:29:24,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:24,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:24,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:24,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:29:24,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:29:24,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:29:24,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:24,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:29:24,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:29:24,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:29:24,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:24,891 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:29:24,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1111907298] [2020-10-27 01:29:24,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:29:24,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:29:24,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554342806] [2020-10-27 01:29:24,893 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:29:24,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:29:24,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:29:24,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:29:24,894 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 7 states. [2020-10-27 01:29:25,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:29:25,027 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2020-10-27 01:29:25,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:29:25,028 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-10-27 01:29:25,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:29:25,029 INFO L225 Difference]: With dead ends: 71 [2020-10-27 01:29:25,029 INFO L226 Difference]: Without dead ends: 48 [2020-10-27 01:29:25,030 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:29:25,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-27 01:29:25,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-10-27 01:29:25,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-27 01:29:25,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2020-10-27 01:29:25,038 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 22 [2020-10-27 01:29:25,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:29:25,038 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2020-10-27 01:29:25,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:29:25,038 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2020-10-27 01:29:25,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 01:29:25,039 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:29:25,039 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:29:25,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:29:25,040 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:29:25,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:29:25,040 INFO L82 PathProgramCache]: Analyzing trace with hash -604500161, now seen corresponding path program 4 times [2020-10-27 01:29:25,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:29:25,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [782601911] [2020-10-27 01:29:25,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:29:25,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:25,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:25,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:25,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:25,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 01:29:25,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:29:25,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 382 [2020-10-27 01:29:25,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:25,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:29:25,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:29:25,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:29:25,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:25,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:29:25,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:25,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:25,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:25,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:29:25,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:29:25,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:29:25,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:25,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:29:25,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:29:25,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:29:25,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:25,512 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:29:25,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [782601911] [2020-10-27 01:29:25,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:29:25,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:29:25,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800795585] [2020-10-27 01:29:25,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:29:25,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:29:25,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:29:25,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:29:25,515 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 8 states. [2020-10-27 01:29:25,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:29:25,658 INFO L93 Difference]: Finished difference Result 82 states and 96 transitions. [2020-10-27 01:29:25,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:29:25,659 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-10-27 01:29:25,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:29:25,660 INFO L225 Difference]: With dead ends: 82 [2020-10-27 01:29:25,660 INFO L226 Difference]: Without dead ends: 55 [2020-10-27 01:29:25,661 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:29:25,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-27 01:29:25,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 48. [2020-10-27 01:29:25,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-27 01:29:25,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2020-10-27 01:29:25,669 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 24 [2020-10-27 01:29:25,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:29:25,669 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2020-10-27 01:29:25,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:29:25,670 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2020-10-27 01:29:25,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 01:29:25,670 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:29:25,671 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:29:25,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:29:25,671 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:29:25,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:29:25,672 INFO L82 PathProgramCache]: Analyzing trace with hash 2060731105, now seen corresponding path program 5 times [2020-10-27 01:29:25,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:29:25,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [694526926] [2020-10-27 01:29:25,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:29:25,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:25,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:25,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:26,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:26,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 01:29:26,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:29:26,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 467 [2020-10-27 01:29:26,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:26,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:29:26,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:29:26,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 01:29:26,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:26,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:29:26,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:26,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:26,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:26,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:29:26,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:29:26,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:29:26,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:26,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:29:26,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:29:26,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:29:26,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:26,242 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:29:26,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [694526926] [2020-10-27 01:29:26,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:29:26,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:29:26,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067532734] [2020-10-27 01:29:26,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:29:26,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:29:26,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:29:26,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:29:26,245 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand 9 states. [2020-10-27 01:29:26,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:29:26,382 INFO L93 Difference]: Finished difference Result 93 states and 109 transitions. [2020-10-27 01:29:26,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:29:26,383 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-10-27 01:29:26,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:29:26,384 INFO L225 Difference]: With dead ends: 93 [2020-10-27 01:29:26,384 INFO L226 Difference]: Without dead ends: 62 [2020-10-27 01:29:26,385 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:29:26,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-27 01:29:26,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 54. [2020-10-27 01:29:26,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-27 01:29:26,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2020-10-27 01:29:26,393 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 26 [2020-10-27 01:29:26,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:29:26,393 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2020-10-27 01:29:26,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:29:26,393 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2020-10-27 01:29:26,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 01:29:26,394 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:29:26,394 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:29:26,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 01:29:26,395 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:29:26,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:29:26,395 INFO L82 PathProgramCache]: Analyzing trace with hash -747497981, now seen corresponding path program 6 times [2020-10-27 01:29:26,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:29:26,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [696007806] [2020-10-27 01:29:26,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:29:26,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:26,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:26,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:27,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:27,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 01:29:27,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:29:27,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 700 [2020-10-27 01:29:27,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:27,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:29:27,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:29:27,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:29:27,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:27,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:29:27,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:27,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:27,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:27,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:29:27,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:29:27,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:29:27,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:27,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:29:27,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:29:27,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:29:27,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:27,203 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:29:27,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [696007806] [2020-10-27 01:29:27,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:29:27,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:29:27,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828401648] [2020-10-27 01:29:27,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:29:27,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:29:27,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:29:27,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:29:27,206 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand 10 states. [2020-10-27 01:29:27,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:29:27,346 INFO L93 Difference]: Finished difference Result 104 states and 122 transitions. [2020-10-27 01:29:27,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:29:27,346 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-27 01:29:27,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:29:27,347 INFO L225 Difference]: With dead ends: 104 [2020-10-27 01:29:27,347 INFO L226 Difference]: Without dead ends: 69 [2020-10-27 01:29:27,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:29:27,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-27 01:29:27,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 60. [2020-10-27 01:29:27,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-27 01:29:27,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 69 transitions. [2020-10-27 01:29:27,356 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 69 transitions. Word has length 28 [2020-10-27 01:29:27,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:29:27,356 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 69 transitions. [2020-10-27 01:29:27,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:29:27,357 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 69 transitions. [2020-10-27 01:29:27,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:29:27,358 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:29:27,358 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:29:27,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 01:29:27,358 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:29:27,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:29:27,359 INFO L82 PathProgramCache]: Analyzing trace with hash 2078779557, now seen corresponding path program 7 times [2020-10-27 01:29:27,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:29:27,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [252070186] [2020-10-27 01:29:27,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:29:27,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:27,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:27,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:28,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:28,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:29:28,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:29:28,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 739 [2020-10-27 01:29:28,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:28,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:29:28,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:29:28,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:29:28,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:28,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:29:28,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:28,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:28,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:28,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:29:28,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:29:28,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:29:28,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:28,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:29:28,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:29:28,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:29:28,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:28,232 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:29:28,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [252070186] [2020-10-27 01:29:28,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:29:28,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:29:28,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399283594] [2020-10-27 01:29:28,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:29:28,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:29:28,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:29:28,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:29:28,235 INFO L87 Difference]: Start difference. First operand 60 states and 69 transitions. Second operand 11 states. [2020-10-27 01:29:28,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:29:28,392 INFO L93 Difference]: Finished difference Result 115 states and 135 transitions. [2020-10-27 01:29:28,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:29:28,392 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-27 01:29:28,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:29:28,393 INFO L225 Difference]: With dead ends: 115 [2020-10-27 01:29:28,393 INFO L226 Difference]: Without dead ends: 76 [2020-10-27 01:29:28,394 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:29:28,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-27 01:29:28,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 66. [2020-10-27 01:29:28,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-27 01:29:28,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2020-10-27 01:29:28,402 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 30 [2020-10-27 01:29:28,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:29:28,402 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2020-10-27 01:29:28,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:29:28,402 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2020-10-27 01:29:28,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:29:28,403 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:29:28,404 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:29:28,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 01:29:28,404 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:29:28,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:29:28,405 INFO L82 PathProgramCache]: Analyzing trace with hash -582804793, now seen corresponding path program 8 times [2020-10-27 01:29:28,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:29:28,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [626791986] [2020-10-27 01:29:28,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:29:28,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:28,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:28,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:29,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:29,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:29:29,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:29:29,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1022 [2020-10-27 01:29:29,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:29,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:29:29,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:29:29,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:29:29,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:29:29,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:29:29,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:29,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:29,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:29,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:29:29,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:29:29,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:29:29,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:29,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:29:29,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:29:29,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:29:29,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:29,577 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:29:29,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [626791986] [2020-10-27 01:29:29,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:29:29,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:29:29,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399469127] [2020-10-27 01:29:29,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:29:29,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:29:29,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:29:29,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:29:29,580 INFO L87 Difference]: Start difference. First operand 66 states and 76 transitions. Second operand 12 states. [2020-10-27 01:29:29,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:29:29,798 INFO L93 Difference]: Finished difference Result 126 states and 148 transitions. [2020-10-27 01:29:29,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:29:29,798 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-27 01:29:29,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:29:29,799 INFO L225 Difference]: With dead ends: 126 [2020-10-27 01:29:29,800 INFO L226 Difference]: Without dead ends: 83 [2020-10-27 01:29:29,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:29:29,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-27 01:29:29,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 72. [2020-10-27 01:29:29,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-27 01:29:29,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 83 transitions. [2020-10-27 01:29:29,811 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 83 transitions. Word has length 32 [2020-10-27 01:29:29,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:29:29,812 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 83 transitions. [2020-10-27 01:29:29,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:29:29,812 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 83 transitions. [2020-10-27 01:29:29,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 01:29:29,813 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:29:29,813 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:29:29,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 01:29:29,814 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:29:29,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:29:29,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1435143273, now seen corresponding path program 9 times [2020-10-27 01:29:29,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:29:29,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1771252976] [2020-10-27 01:29:29,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:29:29,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:29,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:29,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:30,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:30,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 01:29:30,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:29:30,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1027 [2020-10-27 01:29:30,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:30,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:29:30,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:29:30,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 01:29:30,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:30,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:29:30,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:30,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:30,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:30,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:29:30,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:29:30,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:29:30,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:30,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:29:30,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:29:30,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:29:30,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:31,003 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:29:31,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1771252976] [2020-10-27 01:29:31,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:29:31,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:29:31,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676445519] [2020-10-27 01:29:31,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:29:31,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:29:31,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:29:31,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:29:31,006 INFO L87 Difference]: Start difference. First operand 72 states and 83 transitions. Second operand 13 states. [2020-10-27 01:29:31,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:29:31,215 INFO L93 Difference]: Finished difference Result 137 states and 161 transitions. [2020-10-27 01:29:31,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:29:31,215 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-10-27 01:29:31,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:29:31,216 INFO L225 Difference]: With dead ends: 137 [2020-10-27 01:29:31,217 INFO L226 Difference]: Without dead ends: 90 [2020-10-27 01:29:31,217 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:29:31,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-27 01:29:31,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 78. [2020-10-27 01:29:31,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-27 01:29:31,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 90 transitions. [2020-10-27 01:29:31,224 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 90 transitions. Word has length 34 [2020-10-27 01:29:31,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:29:31,225 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 90 transitions. [2020-10-27 01:29:31,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:29:31,225 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 90 transitions. [2020-10-27 01:29:31,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 01:29:31,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:29:31,226 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:29:31,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 01:29:31,227 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:29:31,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:29:31,227 INFO L82 PathProgramCache]: Analyzing trace with hash -641983093, now seen corresponding path program 10 times [2020-10-27 01:29:31,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:29:31,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [476584302] [2020-10-27 01:29:31,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:29:31,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:31,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:31,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:32,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:32,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 01:29:32,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:29:32,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1072 [2020-10-27 01:29:32,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:32,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:29:32,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:29:32,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 01:29:32,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:29:32,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:29:32,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:32,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:32,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:32,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:29:32,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:29:32,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:29:32,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:32,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:29:32,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:29:32,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:29:32,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:32,492 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:29:32,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [476584302] [2020-10-27 01:29:32,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:29:32,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:29:32,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857936138] [2020-10-27 01:29:32,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:29:32,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:29:32,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:29:32,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:29:32,495 INFO L87 Difference]: Start difference. First operand 78 states and 90 transitions. Second operand 14 states. [2020-10-27 01:29:32,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:29:32,714 INFO L93 Difference]: Finished difference Result 148 states and 174 transitions. [2020-10-27 01:29:32,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:29:32,714 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-10-27 01:29:32,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:29:32,716 INFO L225 Difference]: With dead ends: 148 [2020-10-27 01:29:32,716 INFO L226 Difference]: Without dead ends: 97 [2020-10-27 01:29:32,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:29:32,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-27 01:29:32,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 84. [2020-10-27 01:29:32,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-27 01:29:32,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 97 transitions. [2020-10-27 01:29:32,723 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 97 transitions. Word has length 36 [2020-10-27 01:29:32,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:29:32,723 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 97 transitions. [2020-10-27 01:29:32,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:29:32,724 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 97 transitions. [2020-10-27 01:29:32,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 01:29:32,725 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:29:32,725 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:29:32,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 01:29:32,725 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:29:32,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:29:32,726 INFO L82 PathProgramCache]: Analyzing trace with hash 399371821, now seen corresponding path program 11 times [2020-10-27 01:29:32,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:29:32,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2081856486] [2020-10-27 01:29:32,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:29:32,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:32,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:32,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:34,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:34,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 01:29:34,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:29:34,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1364 [2020-10-27 01:29:34,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:34,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:29:34,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:29:34,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 01:29:34,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:34,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:29:34,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:34,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:34,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:34,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:29:34,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:29:34,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:29:34,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:34,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:29:34,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:29:34,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:29:34,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:34,274 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:29:34,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2081856486] [2020-10-27 01:29:34,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:29:34,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:29:34,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727982008] [2020-10-27 01:29:34,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:29:34,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:29:34,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:29:34,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:29:34,277 INFO L87 Difference]: Start difference. First operand 84 states and 97 transitions. Second operand 15 states. [2020-10-27 01:29:34,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:29:34,494 INFO L93 Difference]: Finished difference Result 159 states and 187 transitions. [2020-10-27 01:29:34,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:29:34,495 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2020-10-27 01:29:34,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:29:34,496 INFO L225 Difference]: With dead ends: 159 [2020-10-27 01:29:34,496 INFO L226 Difference]: Without dead ends: 104 [2020-10-27 01:29:34,497 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:29:34,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-27 01:29:34,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 90. [2020-10-27 01:29:34,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-27 01:29:34,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 104 transitions. [2020-10-27 01:29:34,502 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 104 transitions. Word has length 38 [2020-10-27 01:29:34,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:29:34,503 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 104 transitions. [2020-10-27 01:29:34,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:29:34,503 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 104 transitions. [2020-10-27 01:29:34,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 01:29:34,504 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:29:34,504 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:29:34,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 01:29:34,504 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:29:34,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:29:34,505 INFO L82 PathProgramCache]: Analyzing trace with hash 414064207, now seen corresponding path program 12 times [2020-10-27 01:29:34,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:29:34,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2101852892] [2020-10-27 01:29:34,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:29:34,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:34,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:34,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:35,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:35,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 01:29:35,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:29:35,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1360 [2020-10-27 01:29:35,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:35,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:29:35,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:29:35,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:29:35,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:36,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:29:36,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:36,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:36,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:36,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:29:36,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:29:36,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:29:36,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:36,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:29:36,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:29:36,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:29:36,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:36,077 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:29:36,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2101852892] [2020-10-27 01:29:36,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:29:36,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:29:36,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707885290] [2020-10-27 01:29:36,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:29:36,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:29:36,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:29:36,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:29:36,080 INFO L87 Difference]: Start difference. First operand 90 states and 104 transitions. Second operand 16 states. [2020-10-27 01:29:36,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:29:36,352 INFO L93 Difference]: Finished difference Result 170 states and 200 transitions. [2020-10-27 01:29:36,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:29:36,353 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2020-10-27 01:29:36,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:29:36,354 INFO L225 Difference]: With dead ends: 170 [2020-10-27 01:29:36,355 INFO L226 Difference]: Without dead ends: 111 [2020-10-27 01:29:36,356 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:29:36,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-27 01:29:36,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 96. [2020-10-27 01:29:36,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-27 01:29:36,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 111 transitions. [2020-10-27 01:29:36,365 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 111 transitions. Word has length 40 [2020-10-27 01:29:36,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:29:36,365 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 111 transitions. [2020-10-27 01:29:36,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:29:36,365 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 111 transitions. [2020-10-27 01:29:36,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 01:29:36,368 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:29:36,368 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:29:36,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 01:29:36,368 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:29:36,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:29:36,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1648545265, now seen corresponding path program 13 times [2020-10-27 01:29:36,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:29:36,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1846838918] [2020-10-27 01:29:36,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:29:36,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:36,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:36,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:38,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:38,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 01:29:38,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:29:38,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1633 [2020-10-27 01:29:38,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:38,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:29:38,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:29:38,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 01:29:38,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:38,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:29:38,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:38,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:38,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:38,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:29:38,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:29:38,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:29:38,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:38,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:29:38,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:29:38,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:29:38,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:38,253 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:29:38,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1846838918] [2020-10-27 01:29:38,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:29:38,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:29:38,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910351655] [2020-10-27 01:29:38,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:29:38,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:29:38,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:29:38,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:29:38,256 INFO L87 Difference]: Start difference. First operand 96 states and 111 transitions. Second operand 17 states. [2020-10-27 01:29:38,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:29:38,518 INFO L93 Difference]: Finished difference Result 181 states and 213 transitions. [2020-10-27 01:29:38,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:29:38,519 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 42 [2020-10-27 01:29:38,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:29:38,520 INFO L225 Difference]: With dead ends: 181 [2020-10-27 01:29:38,520 INFO L226 Difference]: Without dead ends: 118 [2020-10-27 01:29:38,521 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:29:38,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-27 01:29:38,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 102. [2020-10-27 01:29:38,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-27 01:29:38,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 118 transitions. [2020-10-27 01:29:38,527 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 118 transitions. Word has length 42 [2020-10-27 01:29:38,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:29:38,528 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 118 transitions. [2020-10-27 01:29:38,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:29:38,528 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 118 transitions. [2020-10-27 01:29:38,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-27 01:29:38,529 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:29:38,529 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:29:38,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 01:29:38,529 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:29:38,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:29:38,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1721098989, now seen corresponding path program 14 times [2020-10-27 01:29:38,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:29:38,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1745441599] [2020-10-27 01:29:38,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:29:38,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:38,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:38,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:40,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:40,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 01:29:40,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:29:40,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1835 [2020-10-27 01:29:40,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:40,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 01:29:40,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:29:40,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 01:29:40,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:40,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:29:40,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:40,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:40,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:40,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:29:40,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:29:40,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:29:40,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:40,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:29:40,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:29:40,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:29:40,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:40,650 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:29:40,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1745441599] [2020-10-27 01:29:40,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:29:40,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 01:29:40,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481745349] [2020-10-27 01:29:40,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 01:29:40,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:29:40,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 01:29:40,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:29:40,655 INFO L87 Difference]: Start difference. First operand 102 states and 118 transitions. Second operand 18 states. [2020-10-27 01:29:40,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:29:40,943 INFO L93 Difference]: Finished difference Result 192 states and 226 transitions. [2020-10-27 01:29:40,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:29:40,944 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2020-10-27 01:29:40,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:29:40,945 INFO L225 Difference]: With dead ends: 192 [2020-10-27 01:29:40,945 INFO L226 Difference]: Without dead ends: 125 [2020-10-27 01:29:40,946 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:29:40,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-27 01:29:40,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 108. [2020-10-27 01:29:40,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-27 01:29:40,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 125 transitions. [2020-10-27 01:29:40,960 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 125 transitions. Word has length 44 [2020-10-27 01:29:40,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:29:40,960 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 125 transitions. [2020-10-27 01:29:40,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 01:29:40,960 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 125 transitions. [2020-10-27 01:29:40,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 01:29:40,961 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:29:40,962 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:29:40,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 01:29:40,962 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:29:40,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:29:40,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1543885899, now seen corresponding path program 15 times [2020-10-27 01:29:40,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:29:40,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1332959606] [2020-10-27 01:29:40,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:29:40,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:40,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:41,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:43,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:43,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 01:29:43,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:29:43,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2198 [2020-10-27 01:29:43,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:43,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 01:29:43,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:29:43,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 01:29:43,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:43,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:29:43,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:43,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:43,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:43,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:29:43,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:29:43,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:29:43,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:43,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:29:43,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:29:43,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:29:43,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:43,448 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:29:43,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1332959606] [2020-10-27 01:29:43,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:29:43,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 01:29:43,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527316299] [2020-10-27 01:29:43,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 01:29:43,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:29:43,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 01:29:43,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:29:43,454 INFO L87 Difference]: Start difference. First operand 108 states and 125 transitions. Second operand 19 states. [2020-10-27 01:29:43,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:29:43,790 INFO L93 Difference]: Finished difference Result 203 states and 239 transitions. [2020-10-27 01:29:43,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:29:43,790 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 46 [2020-10-27 01:29:43,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:29:43,791 INFO L225 Difference]: With dead ends: 203 [2020-10-27 01:29:43,792 INFO L226 Difference]: Without dead ends: 132 [2020-10-27 01:29:43,793 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:29:43,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-27 01:29:43,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 114. [2020-10-27 01:29:43,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-27 01:29:43,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 132 transitions. [2020-10-27 01:29:43,799 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 132 transitions. Word has length 46 [2020-10-27 01:29:43,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:29:43,799 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 132 transitions. [2020-10-27 01:29:43,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 01:29:43,799 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 132 transitions. [2020-10-27 01:29:43,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 01:29:43,800 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:29:43,800 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:29:43,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 01:29:43,801 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:29:43,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:29:43,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1254169047, now seen corresponding path program 16 times [2020-10-27 01:29:43,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:29:43,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1107172807] [2020-10-27 01:29:43,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:29:43,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:43,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:43,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:46,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:46,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 01:29:46,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:29:46,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2208 [2020-10-27 01:29:46,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:46,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 01:29:46,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:29:46,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 01:29:46,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:46,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:29:46,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:46,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:46,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:46,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:29:46,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:29:46,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:29:46,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:46,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:29:46,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:29:46,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:29:46,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:46,315 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:29:46,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1107172807] [2020-10-27 01:29:46,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:29:46,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 01:29:46,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344828421] [2020-10-27 01:29:46,316 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 01:29:46,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:29:46,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 01:29:46,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:29:46,317 INFO L87 Difference]: Start difference. First operand 114 states and 132 transitions. Second operand 20 states. [2020-10-27 01:29:46,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:29:46,668 INFO L93 Difference]: Finished difference Result 214 states and 252 transitions. [2020-10-27 01:29:46,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 01:29:46,668 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2020-10-27 01:29:46,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:29:46,670 INFO L225 Difference]: With dead ends: 214 [2020-10-27 01:29:46,671 INFO L226 Difference]: Without dead ends: 139 [2020-10-27 01:29:46,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:29:46,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-27 01:29:46,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 120. [2020-10-27 01:29:46,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-27 01:29:46,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 139 transitions. [2020-10-27 01:29:46,678 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 139 transitions. Word has length 48 [2020-10-27 01:29:46,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:29:46,678 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 139 transitions. [2020-10-27 01:29:46,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 01:29:46,678 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 139 transitions. [2020-10-27 01:29:46,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 01:29:46,679 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:29:46,679 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:29:46,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 01:29:46,679 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:29:46,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:29:46,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1535444857, now seen corresponding path program 17 times [2020-10-27 01:29:46,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:29:46,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1000266473] [2020-10-27 01:29:46,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:29:46,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:46,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:46,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:48,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:48,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 01:29:48,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:29:48,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2122 [2020-10-27 01:29:48,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:48,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 01:29:48,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:29:48,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 01:29:48,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:49,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:29:49,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:49,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:49,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:49,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:29:49,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:29:49,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:29:49,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:49,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:29:49,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:29:49,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:29:49,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:49,145 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:29:49,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1000266473] [2020-10-27 01:29:49,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:29:49,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 01:29:49,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118560094] [2020-10-27 01:29:49,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 01:29:49,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:29:49,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 01:29:49,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:29:49,148 INFO L87 Difference]: Start difference. First operand 120 states and 139 transitions. Second operand 21 states. [2020-10-27 01:29:49,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:29:49,487 INFO L93 Difference]: Finished difference Result 225 states and 265 transitions. [2020-10-27 01:29:49,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 01:29:49,490 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 50 [2020-10-27 01:29:49,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:29:49,491 INFO L225 Difference]: With dead ends: 225 [2020-10-27 01:29:49,491 INFO L226 Difference]: Without dead ends: 146 [2020-10-27 01:29:49,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:29:49,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-27 01:29:49,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 126. [2020-10-27 01:29:49,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-27 01:29:49,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 146 transitions. [2020-10-27 01:29:49,499 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 146 transitions. Word has length 50 [2020-10-27 01:29:49,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:29:49,499 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 146 transitions. [2020-10-27 01:29:49,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 01:29:49,500 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 146 transitions. [2020-10-27 01:29:49,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 01:29:49,500 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:29:49,500 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:29:49,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 01:29:49,501 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:29:49,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:29:49,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1258558619, now seen corresponding path program 18 times [2020-10-27 01:29:49,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:29:49,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [563459301] [2020-10-27 01:29:49,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:29:49,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:49,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:49,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:51,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:51,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 01:29:51,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:29:51,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2100 [2020-10-27 01:29:51,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:51,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 01:29:51,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:29:51,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 01:29:51,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:52,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:29:52,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:52,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:52,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:52,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:29:52,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:29:52,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:29:52,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:52,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:29:52,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:29:52,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:29:52,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:52,055 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:29:52,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [563459301] [2020-10-27 01:29:52,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:29:52,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 01:29:52,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780771494] [2020-10-27 01:29:52,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 01:29:52,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:29:52,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 01:29:52,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:29:52,058 INFO L87 Difference]: Start difference. First operand 126 states and 146 transitions. Second operand 22 states. [2020-10-27 01:29:52,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:29:52,399 INFO L93 Difference]: Finished difference Result 236 states and 278 transitions. [2020-10-27 01:29:52,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 01:29:52,400 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2020-10-27 01:29:52,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:29:52,401 INFO L225 Difference]: With dead ends: 236 [2020-10-27 01:29:52,401 INFO L226 Difference]: Without dead ends: 153 [2020-10-27 01:29:52,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:29:52,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-27 01:29:52,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 132. [2020-10-27 01:29:52,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-27 01:29:52,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 153 transitions. [2020-10-27 01:29:52,410 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 153 transitions. Word has length 52 [2020-10-27 01:29:52,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:29:52,410 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 153 transitions. [2020-10-27 01:29:52,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 01:29:52,410 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 153 transitions. [2020-10-27 01:29:52,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 01:29:52,411 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:29:52,411 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:29:52,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 01:29:52,411 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:29:52,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:29:52,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1458856253, now seen corresponding path program 19 times [2020-10-27 01:29:52,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:29:52,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [746504691] [2020-10-27 01:29:52,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:29:52,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:52,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:52,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:54,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:54,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 01:29:54,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:29:54,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2376 [2020-10-27 01:29:54,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:54,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 01:29:54,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:29:54,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 01:29:54,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:55,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:29:55,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:55,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:55,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:55,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:29:55,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:29:55,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:29:55,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:55,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:29:55,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:29:55,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:29:55,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:29:55,326 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:29:55,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [746504691] [2020-10-27 01:29:55,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:29:55,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 01:29:55,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739688905] [2020-10-27 01:29:55,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 01:29:55,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:29:55,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 01:29:55,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:29:55,335 INFO L87 Difference]: Start difference. First operand 132 states and 153 transitions. Second operand 23 states. [2020-10-27 01:29:55,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:29:55,807 INFO L93 Difference]: Finished difference Result 247 states and 291 transitions. [2020-10-27 01:29:55,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 01:29:55,808 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 54 [2020-10-27 01:29:55,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:29:55,809 INFO L225 Difference]: With dead ends: 247 [2020-10-27 01:29:55,810 INFO L226 Difference]: Without dead ends: 160 [2020-10-27 01:29:55,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:29:55,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-27 01:29:55,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 138. [2020-10-27 01:29:55,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-27 01:29:55,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 160 transitions. [2020-10-27 01:29:55,820 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 160 transitions. Word has length 54 [2020-10-27 01:29:55,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:29:55,821 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 160 transitions. [2020-10-27 01:29:55,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 01:29:55,821 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 160 transitions. [2020-10-27 01:29:55,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 01:29:55,822 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:29:55,822 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:29:55,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 01:29:55,822 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:29:55,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:29:55,823 INFO L82 PathProgramCache]: Analyzing trace with hash 671354207, now seen corresponding path program 20 times [2020-10-27 01:29:55,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:29:55,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2058917169] [2020-10-27 01:29:55,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:29:55,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:55,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:55,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:58,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:58,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 01:29:58,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:29:58,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2355 [2020-10-27 01:29:58,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:58,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 01:29:58,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:29:58,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 01:29:58,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:58,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:29:58,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:58,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:58,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:58,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:29:58,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:29:58,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:29:58,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:58,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:29:58,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:29:58,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:29:58,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:58,742 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:29:58,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2058917169] [2020-10-27 01:29:58,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:29:58,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 01:29:58,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915071239] [2020-10-27 01:29:58,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 01:29:58,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:29:58,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 01:29:58,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:29:58,747 INFO L87 Difference]: Start difference. First operand 138 states and 160 transitions. Second operand 24 states. [2020-10-27 01:29:59,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:29:59,191 INFO L93 Difference]: Finished difference Result 258 states and 304 transitions. [2020-10-27 01:29:59,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 01:29:59,192 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 56 [2020-10-27 01:29:59,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:29:59,193 INFO L225 Difference]: With dead ends: 258 [2020-10-27 01:29:59,193 INFO L226 Difference]: Without dead ends: 167 [2020-10-27 01:29:59,194 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:29:59,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-27 01:29:59,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 144. [2020-10-27 01:29:59,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-27 01:29:59,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 167 transitions. [2020-10-27 01:29:59,210 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 167 transitions. Word has length 56 [2020-10-27 01:29:59,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:29:59,211 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 167 transitions. [2020-10-27 01:29:59,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 01:29:59,211 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 167 transitions. [2020-10-27 01:29:59,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 01:29:59,216 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:29:59,217 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:29:59,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 01:29:59,217 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:29:59,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:29:59,218 INFO L82 PathProgramCache]: Analyzing trace with hash -203867903, now seen corresponding path program 21 times [2020-10-27 01:29:59,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:29:59,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1575474751] [2020-10-27 01:29:59,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:29:59,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:59,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:59,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:01,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:01,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 01:30:01,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:30:01,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2493 [2020-10-27 01:30:01,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:01,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 01:30:01,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:30:01,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 01:30:01,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:02,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:30:02,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:02,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:02,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:02,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:30:02,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:30:02,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:30:02,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:02,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:30:02,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:30:02,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:30:02,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:02,191 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:30:02,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1575474751] [2020-10-27 01:30:02,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:30:02,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 01:30:02,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229164173] [2020-10-27 01:30:02,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 01:30:02,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:30:02,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 01:30:02,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:30:02,204 INFO L87 Difference]: Start difference. First operand 144 states and 167 transitions. Second operand 25 states. [2020-10-27 01:30:02,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:30:02,602 INFO L93 Difference]: Finished difference Result 269 states and 317 transitions. [2020-10-27 01:30:02,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 01:30:02,603 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 58 [2020-10-27 01:30:02,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:30:02,606 INFO L225 Difference]: With dead ends: 269 [2020-10-27 01:30:02,606 INFO L226 Difference]: Without dead ends: 174 [2020-10-27 01:30:02,608 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:30:02,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-27 01:30:02,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 150. [2020-10-27 01:30:02,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-27 01:30:02,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 174 transitions. [2020-10-27 01:30:02,623 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 174 transitions. Word has length 58 [2020-10-27 01:30:02,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:30:02,623 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 174 transitions. [2020-10-27 01:30:02,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 01:30:02,624 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 174 transitions. [2020-10-27 01:30:02,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 01:30:02,624 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:30:02,624 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:30:02,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 01:30:02,625 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:30:02,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:30:02,625 INFO L82 PathProgramCache]: Analyzing trace with hash 521274403, now seen corresponding path program 22 times [2020-10-27 01:30:02,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:30:02,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1611462324] [2020-10-27 01:30:02,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:30:02,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:02,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:02,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:05,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:05,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 01:30:05,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:30:05,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2623 [2020-10-27 01:30:05,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:05,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 01:30:05,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:30:05,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 01:30:05,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:05,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:30:05,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:05,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:05,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:05,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:30:05,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:30:05,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:30:05,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:05,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:30:05,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:30:05,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:30:05,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:05,711 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:30:05,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1611462324] [2020-10-27 01:30:05,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:30:05,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 01:30:05,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749709964] [2020-10-27 01:30:05,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 01:30:05,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:30:05,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 01:30:05,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 01:30:05,714 INFO L87 Difference]: Start difference. First operand 150 states and 174 transitions. Second operand 26 states. [2020-10-27 01:30:06,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:30:06,090 INFO L93 Difference]: Finished difference Result 280 states and 330 transitions. [2020-10-27 01:30:06,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 01:30:06,091 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 60 [2020-10-27 01:30:06,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:30:06,092 INFO L225 Difference]: With dead ends: 280 [2020-10-27 01:30:06,092 INFO L226 Difference]: Without dead ends: 181 [2020-10-27 01:30:06,093 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 01:30:06,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-27 01:30:06,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 156. [2020-10-27 01:30:06,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-27 01:30:06,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 181 transitions. [2020-10-27 01:30:06,101 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 181 transitions. Word has length 60 [2020-10-27 01:30:06,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:30:06,101 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 181 transitions. [2020-10-27 01:30:06,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 01:30:06,101 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 181 transitions. [2020-10-27 01:30:06,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-27 01:30:06,102 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:30:06,102 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:30:06,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 01:30:06,102 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:30:06,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:30:06,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1598328517, now seen corresponding path program 23 times [2020-10-27 01:30:06,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:30:06,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1815607813] [2020-10-27 01:30:06,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:30:06,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:06,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:06,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:08,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:08,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 01:30:08,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:30:08,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2535 [2020-10-27 01:30:08,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:08,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 01:30:08,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:30:08,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 01:30:08,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:09,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:30:09,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:09,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:09,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:09,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:30:09,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:30:09,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:30:09,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:09,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:30:09,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:30:09,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:30:09,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:09,203 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:30:09,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1815607813] [2020-10-27 01:30:09,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:30:09,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 01:30:09,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53779677] [2020-10-27 01:30:09,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 01:30:09,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:30:09,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 01:30:09,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:30:09,205 INFO L87 Difference]: Start difference. First operand 156 states and 181 transitions. Second operand 27 states. [2020-10-27 01:30:09,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:30:09,688 INFO L93 Difference]: Finished difference Result 291 states and 343 transitions. [2020-10-27 01:30:09,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 01:30:09,689 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 62 [2020-10-27 01:30:09,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:30:09,691 INFO L225 Difference]: With dead ends: 291 [2020-10-27 01:30:09,691 INFO L226 Difference]: Without dead ends: 188 [2020-10-27 01:30:09,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:30:09,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-10-27 01:30:09,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 162. [2020-10-27 01:30:09,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-27 01:30:09,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 188 transitions. [2020-10-27 01:30:09,699 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 188 transitions. Word has length 62 [2020-10-27 01:30:09,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:30:09,700 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 188 transitions. [2020-10-27 01:30:09,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 01:30:09,700 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 188 transitions. [2020-10-27 01:30:09,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-27 01:30:09,700 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:30:09,701 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:30:09,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 01:30:09,701 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:30:09,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:30:09,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1560213735, now seen corresponding path program 24 times [2020-10-27 01:30:09,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:30:09,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [964419248] [2020-10-27 01:30:09,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:30:09,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:09,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:09,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:12,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:12,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 01:30:12,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:30:12,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2785 [2020-10-27 01:30:12,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:12,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 01:30:12,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:30:12,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 01:30:12,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:13,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:30:13,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:13,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:13,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:13,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:30:13,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:30:13,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:30:13,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:13,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:30:13,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:30:13,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:30:13,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:13,081 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:30:13,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [964419248] [2020-10-27 01:30:13,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:30:13,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 01:30:13,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483575000] [2020-10-27 01:30:13,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 01:30:13,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:30:13,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 01:30:13,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 01:30:13,084 INFO L87 Difference]: Start difference. First operand 162 states and 188 transitions. Second operand 28 states. [2020-10-27 01:30:13,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:30:13,533 INFO L93 Difference]: Finished difference Result 302 states and 356 transitions. [2020-10-27 01:30:13,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 01:30:13,533 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 64 [2020-10-27 01:30:13,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:30:13,535 INFO L225 Difference]: With dead ends: 302 [2020-10-27 01:30:13,535 INFO L226 Difference]: Without dead ends: 195 [2020-10-27 01:30:13,536 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 01:30:13,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-27 01:30:13,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 168. [2020-10-27 01:30:13,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-27 01:30:13,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 195 transitions. [2020-10-27 01:30:13,546 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 195 transitions. Word has length 64 [2020-10-27 01:30:13,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:30:13,546 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 195 transitions. [2020-10-27 01:30:13,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 01:30:13,546 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 195 transitions. [2020-10-27 01:30:13,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 01:30:13,548 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:30:13,548 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:30:13,548 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 01:30:13,548 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:30:13,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:30:13,551 INFO L82 PathProgramCache]: Analyzing trace with hash -708353399, now seen corresponding path program 25 times [2020-10-27 01:30:13,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:30:13,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1372982830] [2020-10-27 01:30:13,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:30:13,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:13,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:13,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:16,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:16,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 01:30:16,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:30:16,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2998 [2020-10-27 01:30:16,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:16,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 01:30:16,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:30:16,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 01:30:16,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:17,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:30:17,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:17,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:17,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:17,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:30:17,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:30:17,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:30:17,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:17,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:30:17,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:30:17,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:30:17,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:17,179 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:30:17,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1372982830] [2020-10-27 01:30:17,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:30:17,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 01:30:17,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301793162] [2020-10-27 01:30:17,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 01:30:17,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:30:17,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 01:30:17,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:30:17,181 INFO L87 Difference]: Start difference. First operand 168 states and 195 transitions. Second operand 29 states. [2020-10-27 01:30:17,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:30:17,692 INFO L93 Difference]: Finished difference Result 313 states and 369 transitions. [2020-10-27 01:30:17,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 01:30:17,693 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 66 [2020-10-27 01:30:17,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:30:17,695 INFO L225 Difference]: With dead ends: 313 [2020-10-27 01:30:17,695 INFO L226 Difference]: Without dead ends: 202 [2020-10-27 01:30:17,696 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:30:17,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-27 01:30:17,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 174. [2020-10-27 01:30:17,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-27 01:30:17,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 202 transitions. [2020-10-27 01:30:17,704 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 202 transitions. Word has length 66 [2020-10-27 01:30:17,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:30:17,704 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 202 transitions. [2020-10-27 01:30:17,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 01:30:17,704 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 202 transitions. [2020-10-27 01:30:17,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 01:30:17,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:30:17,705 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:30:17,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 01:30:17,706 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:30:17,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:30:17,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1042017195, now seen corresponding path program 26 times [2020-10-27 01:30:17,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:30:17,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [112773276] [2020-10-27 01:30:17,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:30:17,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:17,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:17,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:21,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:21,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 01:30:21,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:30:21,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3312 [2020-10-27 01:30:21,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:21,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 01:30:21,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:30:21,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 01:30:21,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:21,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:30:21,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:21,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:21,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:21,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:30:21,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:30:21,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:30:21,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:21,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:30:21,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:30:21,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:30:21,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:21,629 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:30:21,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [112773276] [2020-10-27 01:30:21,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:30:21,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 01:30:21,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558914942] [2020-10-27 01:30:21,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 01:30:21,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:30:21,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 01:30:21,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 01:30:21,633 INFO L87 Difference]: Start difference. First operand 174 states and 202 transitions. Second operand 30 states. [2020-10-27 01:30:22,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:30:22,126 INFO L93 Difference]: Finished difference Result 324 states and 382 transitions. [2020-10-27 01:30:22,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 01:30:22,127 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 68 [2020-10-27 01:30:22,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:30:22,129 INFO L225 Difference]: With dead ends: 324 [2020-10-27 01:30:22,129 INFO L226 Difference]: Without dead ends: 209 [2020-10-27 01:30:22,130 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 01:30:22,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-27 01:30:22,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 180. [2020-10-27 01:30:22,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-10-27 01:30:22,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 209 transitions. [2020-10-27 01:30:22,138 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 209 transitions. Word has length 68 [2020-10-27 01:30:22,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:30:22,138 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 209 transitions. [2020-10-27 01:30:22,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 01:30:22,138 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 209 transitions. [2020-10-27 01:30:22,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-27 01:30:22,139 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:30:22,139 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:30:22,139 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 01:30:22,139 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:30:22,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:30:22,140 INFO L82 PathProgramCache]: Analyzing trace with hash -479022003, now seen corresponding path program 27 times [2020-10-27 01:30:22,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:30:22,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [376188453] [2020-10-27 01:30:22,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:30:22,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:22,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:22,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:25,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:25,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 01:30:25,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:30:25,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3563 [2020-10-27 01:30:25,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:25,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 01:30:25,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:30:25,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 01:30:25,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:26,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:30:26,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:26,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:26,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:26,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:30:26,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:30:26,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:30:26,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:26,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:30:26,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:30:26,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:30:26,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:26,412 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:30:26,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [376188453] [2020-10-27 01:30:26,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:30:26,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 01:30:26,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903557481] [2020-10-27 01:30:26,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 01:30:26,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:30:26,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 01:30:26,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:30:26,414 INFO L87 Difference]: Start difference. First operand 180 states and 209 transitions. Second operand 31 states. [2020-10-27 01:30:26,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:30:26,977 INFO L93 Difference]: Finished difference Result 335 states and 395 transitions. [2020-10-27 01:30:26,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 01:30:26,978 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 70 [2020-10-27 01:30:26,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:30:26,981 INFO L225 Difference]: With dead ends: 335 [2020-10-27 01:30:26,981 INFO L226 Difference]: Without dead ends: 216 [2020-10-27 01:30:26,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:30:26,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-27 01:30:26,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 186. [2020-10-27 01:30:26,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-10-27 01:30:26,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 216 transitions. [2020-10-27 01:30:26,990 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 216 transitions. Word has length 70 [2020-10-27 01:30:26,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:30:26,991 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 216 transitions. [2020-10-27 01:30:26,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 01:30:26,991 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 216 transitions. [2020-10-27 01:30:26,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 01:30:26,992 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:30:26,992 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:30:26,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 01:30:26,992 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:30:26,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:30:26,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1908810641, now seen corresponding path program 28 times [2020-10-27 01:30:26,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:30:26,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1212798286] [2020-10-27 01:30:26,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:30:27,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:27,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:27,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:30,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:30,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 01:30:30,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:30:30,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3883 [2020-10-27 01:30:30,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:30,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 01:30:30,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:30:30,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-27 01:30:30,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:31,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:30:31,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:31,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:31,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:31,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:30:31,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:30:31,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:30:31,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:31,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:30:31,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:30:31,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:30:31,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:31,623 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:30:31,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1212798286] [2020-10-27 01:30:31,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:30:31,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 01:30:31,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340878817] [2020-10-27 01:30:31,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 01:30:31,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:30:31,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 01:30:31,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 01:30:31,626 INFO L87 Difference]: Start difference. First operand 186 states and 216 transitions. Second operand 32 states. [2020-10-27 01:30:32,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:30:32,187 INFO L93 Difference]: Finished difference Result 346 states and 408 transitions. [2020-10-27 01:30:32,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 01:30:32,187 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 72 [2020-10-27 01:30:32,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:30:32,189 INFO L225 Difference]: With dead ends: 346 [2020-10-27 01:30:32,189 INFO L226 Difference]: Without dead ends: 223 [2020-10-27 01:30:32,190 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 01:30:32,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-27 01:30:32,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 192. [2020-10-27 01:30:32,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-10-27 01:30:32,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 223 transitions. [2020-10-27 01:30:32,199 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 223 transitions. Word has length 72 [2020-10-27 01:30:32,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:30:32,199 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 223 transitions. [2020-10-27 01:30:32,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 01:30:32,199 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 223 transitions. [2020-10-27 01:30:32,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-27 01:30:32,200 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:30:32,200 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:30:32,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 01:30:32,201 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:30:32,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:30:32,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1546157039, now seen corresponding path program 29 times [2020-10-27 01:30:32,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:30:32,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1323141632] [2020-10-27 01:30:32,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:30:32,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:32,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:32,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:36,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:36,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-27 01:30:36,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:30:36,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4362 [2020-10-27 01:30:36,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:36,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 01:30:36,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:30:36,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-27 01:30:36,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:37,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:30:37,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:37,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:37,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:37,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:30:37,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:30:37,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:30:37,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:37,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:30:37,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:30:37,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:30:37,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:37,339 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:30:37,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1323141632] [2020-10-27 01:30:37,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:30:37,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 01:30:37,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916489502] [2020-10-27 01:30:37,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 01:30:37,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:30:37,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 01:30:37,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 01:30:37,342 INFO L87 Difference]: Start difference. First operand 192 states and 223 transitions. Second operand 33 states. [2020-10-27 01:30:37,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:30:37,935 INFO L93 Difference]: Finished difference Result 357 states and 421 transitions. [2020-10-27 01:30:37,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 01:30:37,936 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 74 [2020-10-27 01:30:37,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:30:37,940 INFO L225 Difference]: With dead ends: 357 [2020-10-27 01:30:37,941 INFO L226 Difference]: Without dead ends: 230 [2020-10-27 01:30:37,942 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 01:30:37,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-10-27 01:30:37,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 198. [2020-10-27 01:30:37,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-10-27 01:30:37,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 230 transitions. [2020-10-27 01:30:37,958 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 230 transitions. Word has length 74 [2020-10-27 01:30:37,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:30:37,959 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 230 transitions. [2020-10-27 01:30:37,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 01:30:37,962 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 230 transitions. [2020-10-27 01:30:37,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-27 01:30:37,963 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:30:37,963 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:30:37,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 01:30:37,963 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:30:37,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:30:37,964 INFO L82 PathProgramCache]: Analyzing trace with hash -928396493, now seen corresponding path program 30 times [2020-10-27 01:30:37,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:30:37,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2101358293] [2020-10-27 01:30:37,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:30:37,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:38,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:38,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:42,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:42,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-27 01:30:42,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:30:42,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4898 [2020-10-27 01:30:42,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:42,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 01:30:42,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:30:42,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 01:30:42,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:43,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:30:43,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:43,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:43,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:43,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:30:43,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:30:43,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:30:43,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:43,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:30:43,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:30:43,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:30:43,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:43,667 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:30:43,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2101358293] [2020-10-27 01:30:43,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:30:43,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-27 01:30:43,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163139705] [2020-10-27 01:30:43,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-27 01:30:43,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:30:43,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-27 01:30:43,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 01:30:43,670 INFO L87 Difference]: Start difference. First operand 198 states and 230 transitions. Second operand 34 states. [2020-10-27 01:30:44,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:30:44,203 INFO L93 Difference]: Finished difference Result 368 states and 434 transitions. [2020-10-27 01:30:44,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 01:30:44,205 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 76 [2020-10-27 01:30:44,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:30:44,206 INFO L225 Difference]: With dead ends: 368 [2020-10-27 01:30:44,206 INFO L226 Difference]: Without dead ends: 237 [2020-10-27 01:30:44,208 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 01:30:44,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-27 01:30:44,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 204. [2020-10-27 01:30:44,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-10-27 01:30:44,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 237 transitions. [2020-10-27 01:30:44,225 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 237 transitions. Word has length 76 [2020-10-27 01:30:44,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:30:44,225 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 237 transitions. [2020-10-27 01:30:44,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-27 01:30:44,225 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 237 transitions. [2020-10-27 01:30:44,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-27 01:30:44,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:30:44,226 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:30:44,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 01:30:44,227 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:30:44,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:30:44,227 INFO L82 PathProgramCache]: Analyzing trace with hash 34001365, now seen corresponding path program 31 times [2020-10-27 01:30:44,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:30:44,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1865833199] [2020-10-27 01:30:44,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:30:44,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:44,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:44,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:49,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:49,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 01:30:49,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:30:49,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 01:30:49,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:49,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-27 01:30:49,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:30:49,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 01:30:49,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:50,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:30:50,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:50,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:50,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:50,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:30:50,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:30:50,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:30:50,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:50,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:30:50,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:30:50,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:30:50,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:50,111 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:30:50,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1865833199] [2020-10-27 01:30:50,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:30:50,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-27 01:30:50,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611959446] [2020-10-27 01:30:50,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-27 01:30:50,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:30:50,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-27 01:30:50,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:30:50,114 INFO L87 Difference]: Start difference. First operand 204 states and 237 transitions. Second operand 35 states. [2020-10-27 01:30:50,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:30:50,748 INFO L93 Difference]: Finished difference Result 379 states and 447 transitions. [2020-10-27 01:30:50,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 01:30:50,749 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 78 [2020-10-27 01:30:50,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:30:50,751 INFO L225 Difference]: With dead ends: 379 [2020-10-27 01:30:50,751 INFO L226 Difference]: Without dead ends: 244 [2020-10-27 01:30:50,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:30:50,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-27 01:30:50,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 210. [2020-10-27 01:30:50,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-10-27 01:30:50,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 244 transitions. [2020-10-27 01:30:50,762 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 244 transitions. Word has length 78 [2020-10-27 01:30:50,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:30:50,763 INFO L481 AbstractCegarLoop]: Abstraction has 210 states and 244 transitions. [2020-10-27 01:30:50,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-27 01:30:50,763 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 244 transitions. [2020-10-27 01:30:50,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-27 01:30:50,764 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:30:50,764 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:30:50,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 01:30:50,764 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:30:50,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:30:50,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1480374263, now seen corresponding path program 32 times [2020-10-27 01:30:50,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:30:50,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2094072011] [2020-10-27 01:30:50,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:30:50,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:50,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:50,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:55,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:55,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-27 01:30:55,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:30:55,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-27 01:30:55,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:55,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-27 01:30:55,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:30:55,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 01:30:55,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:56,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:30:56,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:56,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:56,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:56,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:30:56,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:30:56,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:30:56,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:56,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:30:56,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:30:56,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:30:56,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:56,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:30:56,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2094072011] [2020-10-27 01:30:56,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:30:56,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-27 01:30:56,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511672237] [2020-10-27 01:30:56,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-27 01:30:56,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:30:56,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-27 01:30:56,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 01:30:56,715 INFO L87 Difference]: Start difference. First operand 210 states and 244 transitions. Second operand 36 states. [2020-10-27 01:30:57,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:30:57,265 INFO L93 Difference]: Finished difference Result 390 states and 460 transitions. [2020-10-27 01:30:57,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 01:30:57,266 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 80 [2020-10-27 01:30:57,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:30:57,268 INFO L225 Difference]: With dead ends: 390 [2020-10-27 01:30:57,268 INFO L226 Difference]: Without dead ends: 251 [2020-10-27 01:30:57,269 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 01:30:57,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-10-27 01:30:57,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 216. [2020-10-27 01:30:57,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-10-27 01:30:57,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 251 transitions. [2020-10-27 01:30:57,279 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 251 transitions. Word has length 80 [2020-10-27 01:30:57,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:30:57,279 INFO L481 AbstractCegarLoop]: Abstraction has 216 states and 251 transitions. [2020-10-27 01:30:57,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-27 01:30:57,279 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 251 transitions. [2020-10-27 01:30:57,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-27 01:30:57,280 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:30:57,281 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:30:57,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 01:30:57,281 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:30:57,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:30:57,281 INFO L82 PathProgramCache]: Analyzing trace with hash -124674663, now seen corresponding path program 33 times [2020-10-27 01:30:57,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:30:57,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1730328424] [2020-10-27 01:30:57,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:30:57,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:57,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:57,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:02,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:02,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-27 01:31:02,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:31:02,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 01:31:02,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:02,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-27 01:31:02,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:02,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-27 01:31:02,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:03,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:03,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:03,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:03,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:03,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:03,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:03,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:31:03,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:03,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:03,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:03,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:03,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:03,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:31:03,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1730328424] [2020-10-27 01:31:03,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:03,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-27 01:31:03,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645421586] [2020-10-27 01:31:03,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-27 01:31:03,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:03,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-27 01:31:03,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 01:31:03,269 INFO L87 Difference]: Start difference. First operand 216 states and 251 transitions. Second operand 37 states. [2020-10-27 01:31:04,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:04,033 INFO L93 Difference]: Finished difference Result 401 states and 473 transitions. [2020-10-27 01:31:04,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 01:31:04,033 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 82 [2020-10-27 01:31:04,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:04,035 INFO L225 Difference]: With dead ends: 401 [2020-10-27 01:31:04,035 INFO L226 Difference]: Without dead ends: 258 [2020-10-27 01:31:04,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 01:31:04,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-10-27 01:31:04,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 222. [2020-10-27 01:31:04,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-10-27 01:31:04,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 258 transitions. [2020-10-27 01:31:04,045 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 258 transitions. Word has length 82 [2020-10-27 01:31:04,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:04,045 INFO L481 AbstractCegarLoop]: Abstraction has 222 states and 258 transitions. [2020-10-27 01:31:04,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-27 01:31:04,045 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 258 transitions. [2020-10-27 01:31:04,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-27 01:31:04,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:04,046 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:04,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 01:31:04,046 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:04,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:04,047 INFO L82 PathProgramCache]: Analyzing trace with hash -683433285, now seen corresponding path program 34 times [2020-10-27 01:31:04,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:04,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2004944372] [2020-10-27 01:31:04,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:04,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:04,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:04,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:09,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:09,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-27 01:31:09,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:31:09,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 01:31:09,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:09,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-27 01:31:09,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:09,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 01:31:09,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:10,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:10,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:10,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:10,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:10,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:10,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:10,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:31:10,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:10,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:10,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:10,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:10,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:10,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:31:10,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2004944372] [2020-10-27 01:31:10,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:10,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-27 01:31:10,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929996346] [2020-10-27 01:31:10,060 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-27 01:31:10,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:10,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-27 01:31:10,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 01:31:10,061 INFO L87 Difference]: Start difference. First operand 222 states and 258 transitions. Second operand 38 states. [2020-10-27 01:31:10,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:10,860 INFO L93 Difference]: Finished difference Result 412 states and 486 transitions. [2020-10-27 01:31:10,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-27 01:31:10,861 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 84 [2020-10-27 01:31:10,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:10,863 INFO L225 Difference]: With dead ends: 412 [2020-10-27 01:31:10,863 INFO L226 Difference]: Without dead ends: 265 [2020-10-27 01:31:10,864 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 01:31:10,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-10-27 01:31:10,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 228. [2020-10-27 01:31:10,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-10-27 01:31:10,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 265 transitions. [2020-10-27 01:31:10,874 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 265 transitions. Word has length 84 [2020-10-27 01:31:10,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:10,874 INFO L481 AbstractCegarLoop]: Abstraction has 228 states and 265 transitions. [2020-10-27 01:31:10,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-27 01:31:10,874 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 265 transitions. [2020-10-27 01:31:10,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-27 01:31:10,875 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:10,875 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:10,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 01:31:10,876 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:10,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:10,876 INFO L82 PathProgramCache]: Analyzing trace with hash -779557027, now seen corresponding path program 35 times [2020-10-27 01:31:10,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:10,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [963304630] [2020-10-27 01:31:10,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:10,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:10,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:10,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:15,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:15,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-27 01:31:15,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:31:15,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-27 01:31:15,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:15,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-27 01:31:15,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:15,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 01:31:15,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:16,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:16,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:16,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:16,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:16,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:16,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:16,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:31:16,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:16,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:16,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:16,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:16,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:16,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:31:16,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [963304630] [2020-10-27 01:31:16,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:16,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-27 01:31:16,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767928106] [2020-10-27 01:31:16,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-27 01:31:16,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:16,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-27 01:31:16,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 01:31:16,956 INFO L87 Difference]: Start difference. First operand 228 states and 265 transitions. Second operand 39 states. [2020-10-27 01:31:17,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:17,700 INFO L93 Difference]: Finished difference Result 423 states and 499 transitions. [2020-10-27 01:31:17,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-27 01:31:17,701 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 86 [2020-10-27 01:31:17,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:17,703 INFO L225 Difference]: With dead ends: 423 [2020-10-27 01:31:17,703 INFO L226 Difference]: Without dead ends: 272 [2020-10-27 01:31:17,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 01:31:17,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-10-27 01:31:17,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 234. [2020-10-27 01:31:17,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-10-27 01:31:17,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 272 transitions. [2020-10-27 01:31:17,713 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 272 transitions. Word has length 86 [2020-10-27 01:31:17,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:17,713 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 272 transitions. [2020-10-27 01:31:17,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-27 01:31:17,714 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 272 transitions. [2020-10-27 01:31:17,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-27 01:31:17,714 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:17,714 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:17,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 01:31:17,715 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:17,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:17,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1334807423, now seen corresponding path program 36 times [2020-10-27 01:31:17,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:17,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1119939480] [2020-10-27 01:31:17,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:17,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:17,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:17,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:22,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:22,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-27 01:31:22,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:31:22,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 01:31:22,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:22,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-27 01:31:22,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:22,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 01:31:22,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:23,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:23,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:23,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:23,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:23,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:23,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:23,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:31:23,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:23,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:23,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:23,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:23,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:23,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:31:23,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1119939480] [2020-10-27 01:31:23,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:23,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-27 01:31:23,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627127742] [2020-10-27 01:31:23,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-27 01:31:23,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:23,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-27 01:31:23,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 01:31:23,836 INFO L87 Difference]: Start difference. First operand 234 states and 272 transitions. Second operand 40 states. [2020-10-27 01:31:24,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:24,644 INFO L93 Difference]: Finished difference Result 434 states and 512 transitions. [2020-10-27 01:31:24,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-27 01:31:24,645 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 88 [2020-10-27 01:31:24,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:24,647 INFO L225 Difference]: With dead ends: 434 [2020-10-27 01:31:24,647 INFO L226 Difference]: Without dead ends: 279 [2020-10-27 01:31:24,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 01:31:24,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-10-27 01:31:24,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 240. [2020-10-27 01:31:24,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-10-27 01:31:24,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 279 transitions. [2020-10-27 01:31:24,658 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 279 transitions. Word has length 88 [2020-10-27 01:31:24,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:24,658 INFO L481 AbstractCegarLoop]: Abstraction has 240 states and 279 transitions. [2020-10-27 01:31:24,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-27 01:31:24,658 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 279 transitions. [2020-10-27 01:31:24,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-27 01:31:24,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:24,659 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:24,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 01:31:24,660 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:24,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:24,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1719512865, now seen corresponding path program 37 times [2020-10-27 01:31:24,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:24,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1560126465] [2020-10-27 01:31:24,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:24,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:24,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:24,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:29,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:29,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-27 01:31:29,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:31:29,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4805 [2020-10-27 01:31:29,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:29,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-27 01:31:29,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:29,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 01:31:29,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:30,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:30,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:30,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:30,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:30,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:30,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:30,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:31:30,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:30,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:30,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:30,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:30,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:30,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:31:30,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1560126465] [2020-10-27 01:31:30,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:30,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-27 01:31:30,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261365074] [2020-10-27 01:31:30,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-27 01:31:30,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:30,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-27 01:31:30,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 01:31:30,667 INFO L87 Difference]: Start difference. First operand 240 states and 279 transitions. Second operand 41 states. [2020-10-27 01:31:31,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:31,399 INFO L93 Difference]: Finished difference Result 445 states and 525 transitions. [2020-10-27 01:31:31,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-27 01:31:31,400 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 90 [2020-10-27 01:31:31,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:31,402 INFO L225 Difference]: With dead ends: 445 [2020-10-27 01:31:31,402 INFO L226 Difference]: Without dead ends: 286 [2020-10-27 01:31:31,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 01:31:31,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-10-27 01:31:31,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 246. [2020-10-27 01:31:31,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-10-27 01:31:31,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 286 transitions. [2020-10-27 01:31:31,412 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 286 transitions. Word has length 90 [2020-10-27 01:31:31,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:31,412 INFO L481 AbstractCegarLoop]: Abstraction has 246 states and 286 transitions. [2020-10-27 01:31:31,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-27 01:31:31,412 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 286 transitions. [2020-10-27 01:31:31,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-27 01:31:31,413 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:31,413 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:31,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 01:31:31,413 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:31,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:31,414 INFO L82 PathProgramCache]: Analyzing trace with hash 2054255171, now seen corresponding path program 38 times [2020-10-27 01:31:31,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:31,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [770534150] [2020-10-27 01:31:31,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:31,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:31,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:31,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:36,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:36,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-27 01:31:36,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:31:36,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 01:31:36,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:36,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-27 01:31:36,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:36,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-27 01:31:36,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:37,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:37,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:37,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:37,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:37,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:37,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:37,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:31:37,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:37,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:37,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:37,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:37,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:37,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:31:37,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [770534150] [2020-10-27 01:31:37,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:37,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-27 01:31:37,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241801724] [2020-10-27 01:31:37,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-27 01:31:37,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:37,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-27 01:31:37,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 01:31:37,662 INFO L87 Difference]: Start difference. First operand 246 states and 286 transitions. Second operand 42 states. [2020-10-27 01:31:38,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:38,319 INFO L93 Difference]: Finished difference Result 456 states and 538 transitions. [2020-10-27 01:31:38,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-27 01:31:38,320 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 92 [2020-10-27 01:31:38,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:38,323 INFO L225 Difference]: With dead ends: 456 [2020-10-27 01:31:38,323 INFO L226 Difference]: Without dead ends: 293 [2020-10-27 01:31:38,324 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 01:31:38,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2020-10-27 01:31:38,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 252. [2020-10-27 01:31:38,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-10-27 01:31:38,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 293 transitions. [2020-10-27 01:31:38,333 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 293 transitions. Word has length 92 [2020-10-27 01:31:38,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:38,333 INFO L481 AbstractCegarLoop]: Abstraction has 252 states and 293 transitions. [2020-10-27 01:31:38,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-27 01:31:38,333 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 293 transitions. [2020-10-27 01:31:38,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-27 01:31:38,334 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:38,334 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:38,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 01:31:38,335 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:38,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:38,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1619064037, now seen corresponding path program 39 times [2020-10-27 01:31:38,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:38,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [298726122] [2020-10-27 01:31:38,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:38,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:38,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:39,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:43,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:43,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-27 01:31:43,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:31:43,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-27 01:31:43,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:43,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-27 01:31:43,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:43,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-27 01:31:43,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:44,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:44,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:44,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:44,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:44,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:44,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:44,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:31:44,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:44,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:44,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:44,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:44,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:44,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:31:44,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [298726122] [2020-10-27 01:31:44,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:44,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-27 01:31:44,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023010741] [2020-10-27 01:31:44,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-27 01:31:44,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:44,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-27 01:31:44,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 01:31:44,667 INFO L87 Difference]: Start difference. First operand 252 states and 293 transitions. Second operand 43 states. [2020-10-27 01:31:45,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:45,565 INFO L93 Difference]: Finished difference Result 467 states and 551 transitions. [2020-10-27 01:31:45,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-27 01:31:45,566 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 94 [2020-10-27 01:31:45,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:45,568 INFO L225 Difference]: With dead ends: 467 [2020-10-27 01:31:45,568 INFO L226 Difference]: Without dead ends: 300 [2020-10-27 01:31:45,570 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 01:31:45,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2020-10-27 01:31:45,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 258. [2020-10-27 01:31:45,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-10-27 01:31:45,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 300 transitions. [2020-10-27 01:31:45,579 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 300 transitions. Word has length 94 [2020-10-27 01:31:45,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:45,579 INFO L481 AbstractCegarLoop]: Abstraction has 258 states and 300 transitions. [2020-10-27 01:31:45,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-27 01:31:45,579 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 300 transitions. [2020-10-27 01:31:45,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-27 01:31:45,580 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:45,580 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:45,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-27 01:31:45,580 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:45,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:45,581 INFO L82 PathProgramCache]: Analyzing trace with hash 12211975, now seen corresponding path program 40 times [2020-10-27 01:31:45,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:45,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2125173712] [2020-10-27 01:31:45,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:45,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:45,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:45,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:50,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:50,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-27 01:31:50,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:31:50,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 01:31:50,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:50,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-27 01:31:50,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:50,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 01:31:50,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:51,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:51,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:51,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:51,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:51,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:51,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:51,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:31:51,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:51,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:51,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:51,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:51,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:51,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:31:51,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2125173712] [2020-10-27 01:31:51,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:51,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-27 01:31:51,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311400528] [2020-10-27 01:31:51,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-27 01:31:51,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:51,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-27 01:31:51,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 01:31:51,985 INFO L87 Difference]: Start difference. First operand 258 states and 300 transitions. Second operand 44 states. [2020-10-27 01:31:52,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:52,730 INFO L93 Difference]: Finished difference Result 478 states and 564 transitions. [2020-10-27 01:31:52,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-27 01:31:52,730 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 96 [2020-10-27 01:31:52,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:52,733 INFO L225 Difference]: With dead ends: 478 [2020-10-27 01:31:52,733 INFO L226 Difference]: Without dead ends: 307 [2020-10-27 01:31:52,734 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 01:31:52,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2020-10-27 01:31:52,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 264. [2020-10-27 01:31:52,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-10-27 01:31:52,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 307 transitions. [2020-10-27 01:31:52,744 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 307 transitions. Word has length 96 [2020-10-27 01:31:52,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:52,745 INFO L481 AbstractCegarLoop]: Abstraction has 264 states and 307 transitions. [2020-10-27 01:31:52,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-27 01:31:52,745 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 307 transitions. [2020-10-27 01:31:52,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-27 01:31:52,746 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:52,746 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:52,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-27 01:31:52,746 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:52,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:52,746 INFO L82 PathProgramCache]: Analyzing trace with hash 2015606953, now seen corresponding path program 41 times [2020-10-27 01:31:52,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:52,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1391696492] [2020-10-27 01:31:52,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:52,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:52,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:52,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:57,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:57,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-27 01:31:57,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:31:57,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 01:31:57,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:57,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-27 01:31:57,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:57,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-27 01:31:57,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:59,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:59,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:59,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:59,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:59,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:59,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:59,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:31:59,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:59,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:59,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:59,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:59,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:59,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:31:59,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1391696492] [2020-10-27 01:31:59,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:59,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-27 01:31:59,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31512751] [2020-10-27 01:31:59,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-27 01:31:59,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:59,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-27 01:31:59,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 01:31:59,219 INFO L87 Difference]: Start difference. First operand 264 states and 307 transitions. Second operand 45 states. [2020-10-27 01:32:00,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:32:00,114 INFO L93 Difference]: Finished difference Result 489 states and 577 transitions. [2020-10-27 01:32:00,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-27 01:32:00,115 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 98 [2020-10-27 01:32:00,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:32:00,117 INFO L225 Difference]: With dead ends: 489 [2020-10-27 01:32:00,117 INFO L226 Difference]: Without dead ends: 314 [2020-10-27 01:32:00,119 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 01:32:00,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-10-27 01:32:00,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 270. [2020-10-27 01:32:00,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-10-27 01:32:00,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 314 transitions. [2020-10-27 01:32:00,128 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 314 transitions. Word has length 98 [2020-10-27 01:32:00,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:32:00,129 INFO L481 AbstractCegarLoop]: Abstraction has 270 states and 314 transitions. [2020-10-27 01:32:00,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-27 01:32:00,129 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 314 transitions. [2020-10-27 01:32:00,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-27 01:32:00,129 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:32:00,130 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:32:00,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-27 01:32:00,130 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:32:00,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:32:00,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1162135093, now seen corresponding path program 42 times [2020-10-27 01:32:00,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:32:00,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1242966492] [2020-10-27 01:32:00,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:32:00,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:00,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:00,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:05,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:05,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-27 01:32:05,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:32:05,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 01:32:05,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:05,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-27 01:32:05,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:32:05,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-27 01:32:05,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:06,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:32:06,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:06,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:06,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:06,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:32:06,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:06,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:32:06,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:06,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:32:06,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:32:06,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:32:06,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:06,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:32:06,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1242966492] [2020-10-27 01:32:06,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:32:06,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-27 01:32:06,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938239407] [2020-10-27 01:32:06,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-27 01:32:06,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:32:06,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-27 01:32:06,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-27 01:32:06,667 INFO L87 Difference]: Start difference. First operand 270 states and 314 transitions. Second operand 46 states. [2020-10-27 01:32:07,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:32:07,683 INFO L93 Difference]: Finished difference Result 500 states and 590 transitions. [2020-10-27 01:32:07,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-27 01:32:07,684 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 100 [2020-10-27 01:32:07,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:32:07,690 INFO L225 Difference]: With dead ends: 500 [2020-10-27 01:32:07,690 INFO L226 Difference]: Without dead ends: 321 [2020-10-27 01:32:07,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-27 01:32:07,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2020-10-27 01:32:07,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 276. [2020-10-27 01:32:07,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-10-27 01:32:07,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 321 transitions. [2020-10-27 01:32:07,700 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 321 transitions. Word has length 100 [2020-10-27 01:32:07,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:32:07,700 INFO L481 AbstractCegarLoop]: Abstraction has 276 states and 321 transitions. [2020-10-27 01:32:07,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-27 01:32:07,701 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 321 transitions. [2020-10-27 01:32:07,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-27 01:32:07,701 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:32:07,701 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:32:07,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-27 01:32:07,702 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:32:07,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:32:07,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1250493843, now seen corresponding path program 43 times [2020-10-27 01:32:07,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:32:07,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [312373377] [2020-10-27 01:32:07,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:32:07,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:07,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:07,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:12,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:12,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-27 01:32:12,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:32:12,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 01:32:12,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:12,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-27 01:32:12,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:32:12,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 01:32:12,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:14,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:32:14,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:14,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:14,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:14,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:32:14,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:14,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:32:14,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:14,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:32:14,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:32:14,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:32:14,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 01:32:14,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:32:14,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [312373377] [2020-10-27 01:32:14,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:32:14,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-27 01:32:14,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243827519] [2020-10-27 01:32:14,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-27 01:32:14,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:32:14,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-27 01:32:14,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 01:32:14,305 INFO L87 Difference]: Start difference. First operand 276 states and 321 transitions. Second operand 47 states. [2020-10-27 01:32:15,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:32:15,206 INFO L93 Difference]: Finished difference Result 511 states and 603 transitions. [2020-10-27 01:32:15,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-27 01:32:15,207 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 102 [2020-10-27 01:32:15,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:32:15,209 INFO L225 Difference]: With dead ends: 511 [2020-10-27 01:32:15,209 INFO L226 Difference]: Without dead ends: 328 [2020-10-27 01:32:15,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 01:32:15,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-10-27 01:32:15,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 282. [2020-10-27 01:32:15,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-10-27 01:32:15,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 328 transitions. [2020-10-27 01:32:15,218 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 328 transitions. Word has length 102 [2020-10-27 01:32:15,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:32:15,219 INFO L481 AbstractCegarLoop]: Abstraction has 282 states and 328 transitions. [2020-10-27 01:32:15,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-27 01:32:15,219 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 328 transitions. [2020-10-27 01:32:15,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-27 01:32:15,219 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:32:15,219 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:32:15,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-27 01:32:15,220 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:32:15,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:32:15,220 INFO L82 PathProgramCache]: Analyzing trace with hash -263906673, now seen corresponding path program 44 times [2020-10-27 01:32:15,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:32:15,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1939724174] [2020-10-27 01:32:15,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:32:15,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:15,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:15,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:20,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:20,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-27 01:32:20,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:32:20,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 01:32:20,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:20,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-27 01:32:20,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:32:20,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-27 01:32:20,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:21,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:32:21,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:21,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:21,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:21,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:32:21,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:21,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:32:21,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:21,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:32:21,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:32:21,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:32:21,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:21,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:32:21,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1939724174] [2020-10-27 01:32:21,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:32:21,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-27 01:32:21,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224770726] [2020-10-27 01:32:21,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-27 01:32:21,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:32:21,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-27 01:32:21,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-27 01:32:21,838 INFO L87 Difference]: Start difference. First operand 282 states and 328 transitions. Second operand 48 states. [2020-10-27 01:32:22,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:32:22,810 INFO L93 Difference]: Finished difference Result 522 states and 616 transitions. [2020-10-27 01:32:22,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-27 01:32:22,811 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 104 [2020-10-27 01:32:22,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:32:22,813 INFO L225 Difference]: With dead ends: 522 [2020-10-27 01:32:22,813 INFO L226 Difference]: Without dead ends: 335 [2020-10-27 01:32:22,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-27 01:32:22,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2020-10-27 01:32:22,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 288. [2020-10-27 01:32:22,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2020-10-27 01:32:22,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 335 transitions. [2020-10-27 01:32:22,822 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 335 transitions. Word has length 104 [2020-10-27 01:32:22,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:32:22,822 INFO L481 AbstractCegarLoop]: Abstraction has 288 states and 335 transitions. [2020-10-27 01:32:22,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-27 01:32:22,822 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 335 transitions. [2020-10-27 01:32:22,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-27 01:32:22,823 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:32:22,823 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:32:22,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-27 01:32:22,823 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:32:22,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:32:22,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1341408719, now seen corresponding path program 45 times [2020-10-27 01:32:22,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:32:22,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [884953056] [2020-10-27 01:32:22,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:32:22,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:22,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:23,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:27,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:27,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-27 01:32:27,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:32:27,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-27 01:32:27,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:27,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-27 01:32:27,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:32:27,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-27 01:32:27,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:29,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:32:29,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:29,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:29,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:29,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:32:29,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:29,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:32:29,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:29,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:32:29,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:32:29,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:32:29,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:29,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:32:29,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [884953056] [2020-10-27 01:32:29,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:32:29,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-27 01:32:29,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474110450] [2020-10-27 01:32:29,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-27 01:32:29,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:32:29,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-27 01:32:29,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 01:32:29,484 INFO L87 Difference]: Start difference. First operand 288 states and 335 transitions. Second operand 49 states. [2020-10-27 01:32:30,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:32:30,602 INFO L93 Difference]: Finished difference Result 533 states and 629 transitions. [2020-10-27 01:32:30,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-27 01:32:30,603 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 106 [2020-10-27 01:32:30,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:32:30,605 INFO L225 Difference]: With dead ends: 533 [2020-10-27 01:32:30,605 INFO L226 Difference]: Without dead ends: 342 [2020-10-27 01:32:30,606 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 01:32:30,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2020-10-27 01:32:30,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 294. [2020-10-27 01:32:30,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2020-10-27 01:32:30,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 342 transitions. [2020-10-27 01:32:30,613 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 342 transitions. Word has length 106 [2020-10-27 01:32:30,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:32:30,614 INFO L481 AbstractCegarLoop]: Abstraction has 294 states and 342 transitions. [2020-10-27 01:32:30,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-27 01:32:30,614 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 342 transitions. [2020-10-27 01:32:30,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-27 01:32:30,615 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:32:30,615 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:32:30,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-27 01:32:30,615 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:32:30,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:32:30,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1733756589, now seen corresponding path program 46 times [2020-10-27 01:32:30,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:32:30,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1607263962] [2020-10-27 01:32:30,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:32:30,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:30,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:30,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:35,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:35,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-27 01:32:35,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:32:35,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 01:32:35,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:35,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-27 01:32:35,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:32:35,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-27 01:32:35,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:37,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:32:37,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:37,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:37,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:37,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:32:37,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:37,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:32:37,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:37,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:32:37,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:32:37,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:32:37,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:37,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:32:37,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1607263962] [2020-10-27 01:32:37,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:32:37,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-27 01:32:37,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408229609] [2020-10-27 01:32:37,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-27 01:32:37,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:32:37,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-27 01:32:37,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-27 01:32:37,388 INFO L87 Difference]: Start difference. First operand 294 states and 342 transitions. Second operand 50 states. [2020-10-27 01:32:38,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:32:38,257 INFO L93 Difference]: Finished difference Result 544 states and 642 transitions. [2020-10-27 01:32:38,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-27 01:32:38,258 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 108 [2020-10-27 01:32:38,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:32:38,260 INFO L225 Difference]: With dead ends: 544 [2020-10-27 01:32:38,260 INFO L226 Difference]: Without dead ends: 349 [2020-10-27 01:32:38,262 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-27 01:32:38,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2020-10-27 01:32:38,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 300. [2020-10-27 01:32:38,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300 states. [2020-10-27 01:32:38,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 349 transitions. [2020-10-27 01:32:38,269 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 349 transitions. Word has length 108 [2020-10-27 01:32:38,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:32:38,270 INFO L481 AbstractCegarLoop]: Abstraction has 300 states and 349 transitions. [2020-10-27 01:32:38,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-27 01:32:38,270 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 349 transitions. [2020-10-27 01:32:38,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-27 01:32:38,270 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:32:38,270 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:32:38,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-27 01:32:38,271 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:32:38,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:32:38,271 INFO L82 PathProgramCache]: Analyzing trace with hash -822937611, now seen corresponding path program 47 times [2020-10-27 01:32:38,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:32:38,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [450446553] [2020-10-27 01:32:38,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:32:38,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:38,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:38,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:43,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:43,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-27 01:32:43,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:32:43,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 01:32:43,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:43,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-27 01:32:43,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:32:43,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-27 01:32:43,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:45,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:32:45,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:45,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:45,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:45,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:32:45,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:45,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:32:45,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:45,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:32:45,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:32:45,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:32:45,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:45,128 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:32:45,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [450446553] [2020-10-27 01:32:45,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:32:45,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-27 01:32:45,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873530292] [2020-10-27 01:32:45,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-27 01:32:45,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:32:45,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-27 01:32:45,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 01:32:45,130 INFO L87 Difference]: Start difference. First operand 300 states and 349 transitions. Second operand 51 states. [2020-10-27 01:32:46,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:32:46,267 INFO L93 Difference]: Finished difference Result 555 states and 655 transitions. [2020-10-27 01:32:46,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-27 01:32:46,267 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 110 [2020-10-27 01:32:46,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:32:46,269 INFO L225 Difference]: With dead ends: 555 [2020-10-27 01:32:46,269 INFO L226 Difference]: Without dead ends: 356 [2020-10-27 01:32:46,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 01:32:46,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2020-10-27 01:32:46,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 306. [2020-10-27 01:32:46,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 306 states. [2020-10-27 01:32:46,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 356 transitions. [2020-10-27 01:32:46,279 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 356 transitions. Word has length 110 [2020-10-27 01:32:46,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:32:46,280 INFO L481 AbstractCegarLoop]: Abstraction has 306 states and 356 transitions. [2020-10-27 01:32:46,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-27 01:32:46,280 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 356 transitions. [2020-10-27 01:32:46,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-27 01:32:46,294 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:32:46,294 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:32:46,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-27 01:32:46,294 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:32:46,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:32:46,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1699228137, now seen corresponding path program 48 times [2020-10-27 01:32:46,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:32:46,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1635593934] [2020-10-27 01:32:46,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:32:46,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:46,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:46,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:51,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:51,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-27 01:32:51,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:32:51,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-27 01:32:51,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:51,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-27 01:32:51,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:32:51,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-27 01:32:51,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:53,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:32:53,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:53,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:53,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:53,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:32:53,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:53,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:32:53,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:53,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:32:53,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:32:53,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:32:53,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:53,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:32:53,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1635593934] [2020-10-27 01:32:53,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:32:53,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-27 01:32:53,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262665699] [2020-10-27 01:32:53,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-27 01:32:53,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:32:53,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-27 01:32:53,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-27 01:32:53,247 INFO L87 Difference]: Start difference. First operand 306 states and 356 transitions. Second operand 52 states. [2020-10-27 01:32:54,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:32:54,238 INFO L93 Difference]: Finished difference Result 566 states and 668 transitions. [2020-10-27 01:32:54,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-27 01:32:54,239 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 112 [2020-10-27 01:32:54,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:32:54,241 INFO L225 Difference]: With dead ends: 566 [2020-10-27 01:32:54,241 INFO L226 Difference]: Without dead ends: 363 [2020-10-27 01:32:54,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-27 01:32:54,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2020-10-27 01:32:54,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 312. [2020-10-27 01:32:54,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2020-10-27 01:32:54,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 363 transitions. [2020-10-27 01:32:54,250 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 363 transitions. Word has length 112 [2020-10-27 01:32:54,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:32:54,251 INFO L481 AbstractCegarLoop]: Abstraction has 312 states and 363 transitions. [2020-10-27 01:32:54,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-27 01:32:54,251 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 363 transitions. [2020-10-27 01:32:54,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-27 01:32:54,252 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:32:54,252 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:32:54,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-27 01:32:54,252 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:32:54,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:32:54,253 INFO L82 PathProgramCache]: Analyzing trace with hash -2000833607, now seen corresponding path program 49 times [2020-10-27 01:32:54,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:32:54,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1878703011] [2020-10-27 01:32:54,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:32:54,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:54,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:54,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:59,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:59,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-27 01:32:59,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:32:59,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-27 01:32:59,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:59,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-27 01:32:59,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:32:59,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-27 01:32:59,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:01,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:33:01,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:01,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:01,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:01,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:33:01,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:01,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:33:01,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:01,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:33:01,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:33:01,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:33:01,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:01,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:33:01,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1878703011] [2020-10-27 01:33:01,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:33:01,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-27 01:33:01,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762354152] [2020-10-27 01:33:01,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-27 01:33:01,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:33:01,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-27 01:33:01,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 01:33:01,345 INFO L87 Difference]: Start difference. First operand 312 states and 363 transitions. Second operand 53 states. [2020-10-27 01:33:02,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:33:02,610 INFO L93 Difference]: Finished difference Result 577 states and 681 transitions. [2020-10-27 01:33:02,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-27 01:33:02,611 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 114 [2020-10-27 01:33:02,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:33:02,613 INFO L225 Difference]: With dead ends: 577 [2020-10-27 01:33:02,613 INFO L226 Difference]: Without dead ends: 370 [2020-10-27 01:33:02,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 01:33:02,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2020-10-27 01:33:02,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 318. [2020-10-27 01:33:02,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2020-10-27 01:33:02,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 370 transitions. [2020-10-27 01:33:02,621 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 370 transitions. Word has length 114 [2020-10-27 01:33:02,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:33:02,622 INFO L481 AbstractCegarLoop]: Abstraction has 318 states and 370 transitions. [2020-10-27 01:33:02,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-27 01:33:02,622 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 370 transitions. [2020-10-27 01:33:02,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-27 01:33:02,623 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:33:02,623 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:33:02,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-27 01:33:02,623 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:33:02,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:33:02,624 INFO L82 PathProgramCache]: Analyzing trace with hash 214085851, now seen corresponding path program 50 times [2020-10-27 01:33:02,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:33:02,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1036638018] [2020-10-27 01:33:02,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:33:02,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:02,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:02,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:07,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:07,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-27 01:33:07,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:33:07,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-27 01:33:07,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:07,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-27 01:33:07,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:33:07,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-27 01:33:07,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:09,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:33:09,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:09,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:09,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:09,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:33:09,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:09,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:33:09,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:09,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:33:09,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:33:09,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:33:09,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:09,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:33:09,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1036638018] [2020-10-27 01:33:09,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:33:09,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-27 01:33:09,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987722728] [2020-10-27 01:33:09,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-27 01:33:09,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:33:09,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-27 01:33:09,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-27 01:33:09,791 INFO L87 Difference]: Start difference. First operand 318 states and 370 transitions. Second operand 54 states.