/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/loops-crafted-1/in-de32.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:45:03,168 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:45:03,171 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:45:03,207 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:45:03,207 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:45:03,209 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:45:03,211 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:45:03,213 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:45:03,216 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:45:03,217 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:45:03,218 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:45:03,220 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:45:03,220 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:45:03,221 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:45:03,223 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:45:03,224 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:45:03,225 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:45:03,226 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:45:03,240 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:45:03,247 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:45:03,251 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:45:03,254 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:45:03,256 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:45:03,258 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:45:03,267 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:45:03,270 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:45:03,271 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:45:03,272 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:45:03,273 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:45:03,274 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:45:03,274 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:45:03,275 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:45:03,277 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:45:03,278 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:45:03,280 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:45:03,281 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:45:03,281 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:45:03,282 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:45:03,282 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:45:03,283 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:45:03,285 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:45:03,286 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 01:45:03,339 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:45:03,340 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:45:03,341 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:45:03,342 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:45:03,342 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:45:03,342 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:45:03,342 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:45:03,343 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:45:03,343 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:45:03,343 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:45:03,343 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:45:03,343 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:45:03,344 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:45:03,344 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:45:03,344 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:45:03,344 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:45:03,345 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:45:03,345 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:45:03,345 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:45:03,345 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:45:03,345 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:45:03,346 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:45:03,346 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:45:03,346 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:45:03,346 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:45:03,347 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:45:03,347 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:45:03,347 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:45:03,347 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:45:03,347 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:45:03,719 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:45:03,766 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:45:03,770 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:45:03,771 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:45:03,772 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:45:03,773 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/in-de32.c [2020-10-27 01:45:03,871 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bf9f92f55/d6fb70f8d1544240a0fb4e4a24f5f112/FLAGd6f01495e [2020-10-27 01:45:04,489 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:45:04,489 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/in-de32.c [2020-10-27 01:45:04,497 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bf9f92f55/d6fb70f8d1544240a0fb4e4a24f5f112/FLAGd6f01495e [2020-10-27 01:45:04,848 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bf9f92f55/d6fb70f8d1544240a0fb4e4a24f5f112 [2020-10-27 01:45:04,851 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:45:04,858 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:45:04,860 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:45:04,860 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:45:04,864 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:45:04,865 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:45:04" (1/1) ... [2020-10-27 01:45:04,869 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e875b5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:45:04, skipping insertion in model container [2020-10-27 01:45:04,869 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:45:04" (1/1) ... [2020-10-27 01:45:04,878 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:45:04,892 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:45:05,056 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:45:05,067 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:45:05,085 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:45:05,101 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:45:05,102 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:45:05 WrapperNode [2020-10-27 01:45:05,102 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:45:05,104 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:45:05,104 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:45:05,104 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:45:05,117 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:45:05" (1/1) ... [2020-10-27 01:45:05,117 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:45:05" (1/1) ... [2020-10-27 01:45:05,125 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:45:05" (1/1) ... [2020-10-27 01:45:05,125 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:45:05" (1/1) ... [2020-10-27 01:45:05,131 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:45:05" (1/1) ... [2020-10-27 01:45:05,137 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:45:05" (1/1) ... [2020-10-27 01:45:05,138 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:45:05" (1/1) ... [2020-10-27 01:45:05,140 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:45:05,141 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:45:05,142 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:45:05,142 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:45:05,143 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:45:05" (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 01:45:05,223 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:45:05,223 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:45:05,223 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:45:05,223 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 01:45:05,224 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:45:05,224 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:45:05,224 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:45:05,224 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:45:05,224 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:45:05,225 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-27 01:45:05,225 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 01:45:05,225 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:45:05,225 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:45:05,225 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:45:05,225 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:45:05,226 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:45:05,226 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:45:05,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:45:05,473 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:45:05,474 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-27 01:45:05,476 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:45:05 BoogieIcfgContainer [2020-10-27 01:45:05,476 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:45:05,479 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:45:05,479 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:45:05,483 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:45:05,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:45:04" (1/3) ... [2020-10-27 01:45:05,484 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c3ae19b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:45:05, skipping insertion in model container [2020-10-27 01:45:05,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:45:05" (2/3) ... [2020-10-27 01:45:05,485 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c3ae19b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:45:05, skipping insertion in model container [2020-10-27 01:45:05,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:45:05" (3/3) ... [2020-10-27 01:45:05,487 INFO L111 eAbstractionObserver]: Analyzing ICFG in-de32.c [2020-10-27 01:45:05,530 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:45:05,542 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:45:05,580 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:45:05,652 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:45:05,653 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:45:05,653 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:45:05,656 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:45:05,656 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:45:05,657 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:45:05,657 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:45:05,657 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:45:05,693 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-10-27 01:45:05,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-27 01:45:05,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:45:05,703 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:45:05,703 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:45:05,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:45:05,711 INFO L82 PathProgramCache]: Analyzing trace with hash -560740121, now seen corresponding path program 1 times [2020-10-27 01:45:05,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:45:05,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [550870696] [2020-10-27 01:45:05,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:45:05,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:06,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:06,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:06,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 01:45:06,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:06,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 395 [2020-10-27 01:45:06,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:06,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:45:06,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:45:06,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 01:45:06,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 01:45:06,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:45:06,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:06,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:06,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:06,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:45:06,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:06,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 01:45:06,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:06,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:45:06,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:45:06,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:45:06,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:06,579 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 01:45:06,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [550870696] [2020-10-27 01:45:06,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:45:06,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 01:45:06,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90647477] [2020-10-27 01:45:06,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:45:06,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:45:06,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:45:06,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:45:06,613 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 6 states. [2020-10-27 01:45:06,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:45:06,944 INFO L93 Difference]: Finished difference Result 52 states and 70 transitions. [2020-10-27 01:45:06,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:45:06,946 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-10-27 01:45:06,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:45:06,954 INFO L225 Difference]: With dead ends: 52 [2020-10-27 01:45:06,954 INFO L226 Difference]: Without dead ends: 18 [2020-10-27 01:45:06,958 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:45:06,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-27 01:45:06,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-27 01:45:06,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-27 01:45:07,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2020-10-27 01:45:07,001 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 15 [2020-10-27 01:45:07,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:45:07,002 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2020-10-27 01:45:07,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:45:07,002 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2020-10-27 01:45:07,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 01:45:07,003 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:45:07,003 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:45:07,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:45:07,004 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:45:07,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:45:07,005 INFO L82 PathProgramCache]: Analyzing trace with hash 866261939, now seen corresponding path program 1 times [2020-10-27 01:45:07,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:45:07,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1401485258] [2020-10-27 01:45:07,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:45:07,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:07,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:07,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:07,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:07,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 01:45:07,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:45:07,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 244 [2020-10-27 01:45:07,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:07,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:45:07,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:45:07,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 01:45:07,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:45:07,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:45:07,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:07,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:07,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:07,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:45:07,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:07,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 01:45:07,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:07,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:45:07,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:45:07,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:45:07,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:07,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:45:07,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1401485258] [2020-10-27 01:45:07,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:45:07,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:45:07,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028591105] [2020-10-27 01:45:07,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:45:07,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:45:07,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:45:07,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:45:07,436 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 4 states. [2020-10-27 01:45:07,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:45:07,547 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2020-10-27 01:45:07,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:45:07,547 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-27 01:45:07,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:45:07,550 INFO L225 Difference]: With dead ends: 32 [2020-10-27 01:45:07,550 INFO L226 Difference]: Without dead ends: 24 [2020-10-27 01:45:07,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:45:07,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-27 01:45:07,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-10-27 01:45:07,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-27 01:45:07,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2020-10-27 01:45:07,561 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 16 [2020-10-27 01:45:07,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:45:07,562 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2020-10-27 01:45:07,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:45:07,562 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2020-10-27 01:45:07,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 01:45:07,563 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:45:07,563 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:45:07,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:45:07,564 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:45:07,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:45:07,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1404269348, now seen corresponding path program 1 times [2020-10-27 01:45:07,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:45:07,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [590030011] [2020-10-27 01:45:07,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:45:07,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:07,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:07,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:07,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:07,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 01:45:07,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:45:07,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 98 [2020-10-27 01:45:07,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:07,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:45:07,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:45:07,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 01:45:07,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:07,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:45:07,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:07,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:07,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:07,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:45:07,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:07,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:45:07,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:07,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:45:07,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:45:07,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:45:07,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:07,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:45:07,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [590030011] [2020-10-27 01:45:07,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:45:07,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 01:45:07,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532100232] [2020-10-27 01:45:07,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:45:07,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:45:07,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:45:07,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:45:07,759 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand 5 states. [2020-10-27 01:45:07,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:45:07,877 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2020-10-27 01:45:07,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:45:07,878 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-27 01:45:07,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:45:07,878 INFO L225 Difference]: With dead ends: 29 [2020-10-27 01:45:07,879 INFO L226 Difference]: Without dead ends: 19 [2020-10-27 01:45:07,879 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:45:07,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-27 01:45:07,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-27 01:45:07,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-27 01:45:07,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2020-10-27 01:45:07,886 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 16 [2020-10-27 01:45:07,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:45:07,886 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2020-10-27 01:45:07,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:45:07,887 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2020-10-27 01:45:07,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 01:45:07,887 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:45:07,888 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:45:07,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:45:07,888 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:45:07,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:45:07,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1675587371, now seen corresponding path program 1 times [2020-10-27 01:45:07,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:45:07,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [277693348] [2020-10-27 01:45:07,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:45:07,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:07,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:07,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:08,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:08,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 01:45:08,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:45:08,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 119 [2020-10-27 01:45:08,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:08,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:45:08,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:45:08,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 01:45:08,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:08,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:45:08,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:08,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:08,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:08,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:45:08,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:08,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:45:08,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:08,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:45:08,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:45:08,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:45:08,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:08,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:45:08,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [277693348] [2020-10-27 01:45:08,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:45:08,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 01:45:08,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333921947] [2020-10-27 01:45:08,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:45:08,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:45:08,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:45:08,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:45:08,148 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 6 states. [2020-10-27 01:45:08,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:45:08,337 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2020-10-27 01:45:08,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:45:08,337 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-27 01:45:08,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:45:08,338 INFO L225 Difference]: With dead ends: 34 [2020-10-27 01:45:08,338 INFO L226 Difference]: Without dead ends: 26 [2020-10-27 01:45:08,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:45:08,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-27 01:45:08,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-10-27 01:45:08,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-27 01:45:08,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2020-10-27 01:45:08,348 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 17 [2020-10-27 01:45:08,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:45:08,348 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2020-10-27 01:45:08,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:45:08,348 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2020-10-27 01:45:08,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 01:45:08,349 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:45:08,349 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 01:45:08,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:45:08,350 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:45:08,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:45:08,350 INFO L82 PathProgramCache]: Analyzing trace with hash 164096052, now seen corresponding path program 1 times [2020-10-27 01:45:08,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:45:08,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [539216102] [2020-10-27 01:45:08,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:45:08,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:08,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:08,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:08,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 01:45:08,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:08,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 115 [2020-10-27 01:45:08,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:08,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:45:08,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:45:08,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 01:45:08,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:08,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:45:08,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:08,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:08,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:08,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:45:08,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:08,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:45:08,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:08,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:45:08,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:45:08,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:45:08,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:08,604 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:45:08,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [539216102] [2020-10-27 01:45:08,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:45:08,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:45:08,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391753560] [2020-10-27 01:45:08,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:45:08,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:45:08,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:45:08,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:45:08,607 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand 7 states. [2020-10-27 01:45:08,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:45:08,891 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2020-10-27 01:45:08,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:45:08,891 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-10-27 01:45:08,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:45:08,893 INFO L225 Difference]: With dead ends: 38 [2020-10-27 01:45:08,893 INFO L226 Difference]: Without dead ends: 30 [2020-10-27 01:45:08,894 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:45:08,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-27 01:45:08,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2020-10-27 01:45:08,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-27 01:45:08,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2020-10-27 01:45:08,903 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 18 [2020-10-27 01:45:08,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:45:08,904 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2020-10-27 01:45:08,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:45:08,904 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2020-10-27 01:45:08,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 01:45:08,905 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:45:08,905 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:45:08,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:45:08,905 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:45:08,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:45:08,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1131462643, now seen corresponding path program 2 times [2020-10-27 01:45:08,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:45:08,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [308256267] [2020-10-27 01:45:08,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:45:08,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:08,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:08,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:09,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:09,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:09,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 01:45:09,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:45:09,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 279 [2020-10-27 01:45:09,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:09,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:45:09,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:45:09,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:45:09,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:09,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:45:09,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:09,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:09,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:09,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:45:09,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:09,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 01:45:09,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:09,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:45:09,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:45:09,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:45:09,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:09,315 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:45:09,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [308256267] [2020-10-27 01:45:09,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:45:09,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:45:09,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246077105] [2020-10-27 01:45:09,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:45:09,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:45:09,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:45:09,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:45:09,322 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 7 states. [2020-10-27 01:45:09,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:45:09,573 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2020-10-27 01:45:09,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:45:09,573 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-10-27 01:45:09,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:45:09,574 INFO L225 Difference]: With dead ends: 47 [2020-10-27 01:45:09,575 INFO L226 Difference]: Without dead ends: 39 [2020-10-27 01:45:09,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:45:09,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-27 01:45:09,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2020-10-27 01:45:09,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-27 01:45:09,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2020-10-27 01:45:09,585 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 18 [2020-10-27 01:45:09,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:45:09,585 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2020-10-27 01:45:09,585 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:45:09,586 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2020-10-27 01:45:09,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 01:45:09,586 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:45:09,586 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:45:09,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:45:09,587 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:45:09,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:45:09,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1359707317, now seen corresponding path program 2 times [2020-10-27 01:45:09,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:45:09,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [100340938] [2020-10-27 01:45:09,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:45:09,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:09,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:09,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:09,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:09,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 01:45:09,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:45:09,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 284 [2020-10-27 01:45:09,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:09,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:45:09,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:45:09,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:45:09,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:10,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:45:10,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:10,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:10,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:10,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:45:10,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:10,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:45:10,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:10,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:45:10,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:45:10,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:45:10,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:10,018 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:45:10,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [100340938] [2020-10-27 01:45:10,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:45:10,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:45:10,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617605284] [2020-10-27 01:45:10,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:45:10,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:45:10,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:45:10,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:45:10,022 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand 7 states. [2020-10-27 01:45:10,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:45:10,261 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2020-10-27 01:45:10,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:45:10,262 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-10-27 01:45:10,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:45:10,263 INFO L225 Difference]: With dead ends: 41 [2020-10-27 01:45:10,264 INFO L226 Difference]: Without dead ends: 29 [2020-10-27 01:45:10,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:45:10,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-27 01:45:10,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-27 01:45:10,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-27 01:45:10,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2020-10-27 01:45:10,276 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 19 [2020-10-27 01:45:10,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:45:10,276 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2020-10-27 01:45:10,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:45:10,276 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2020-10-27 01:45:10,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 01:45:10,277 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:45:10,277 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:45:10,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 01:45:10,281 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:45:10,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:45:10,281 INFO L82 PathProgramCache]: Analyzing trace with hash -2044300139, now seen corresponding path program 3 times [2020-10-27 01:45:10,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:45:10,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [27374039] [2020-10-27 01:45:10,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:45:10,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:10,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:10,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:10,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:10,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:10,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 01:45:10,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:45:10,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 380 [2020-10-27 01:45:10,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:10,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:45:10,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:45:10,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 01:45:10,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:10,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:45:10,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:10,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:10,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:10,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:45:10,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:10,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:45:10,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:10,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:45:10,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:45:10,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:45:10,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:10,822 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:45:10,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [27374039] [2020-10-27 01:45:10,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:45:10,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:45:10,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307892888] [2020-10-27 01:45:10,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:45:10,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:45:10,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:45:10,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:45:10,830 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand 8 states. [2020-10-27 01:45:11,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:45:11,153 INFO L93 Difference]: Finished difference Result 57 states and 79 transitions. [2020-10-27 01:45:11,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:45:11,156 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-10-27 01:45:11,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:45:11,157 INFO L225 Difference]: With dead ends: 57 [2020-10-27 01:45:11,157 INFO L226 Difference]: Without dead ends: 50 [2020-10-27 01:45:11,158 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:45:11,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-27 01:45:11,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 39. [2020-10-27 01:45:11,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-27 01:45:11,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 52 transitions. [2020-10-27 01:45:11,178 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 52 transitions. Word has length 19 [2020-10-27 01:45:11,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:45:11,178 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 52 transitions. [2020-10-27 01:45:11,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:45:11,179 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 52 transitions. [2020-10-27 01:45:11,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 01:45:11,182 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:45:11,182 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 01:45:11,182 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 01:45:11,183 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:45:11,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:45:11,183 INFO L82 PathProgramCache]: Analyzing trace with hash -2098018908, now seen corresponding path program 3 times [2020-10-27 01:45:11,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:45:11,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [7465411] [2020-10-27 01:45:11,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:45:11,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:11,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:11,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:11,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:11,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 01:45:11,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:45:11,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 408 [2020-10-27 01:45:11,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:11,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:45:11,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:45:11,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:45:11,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:11,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:45:11,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:11,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:11,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:11,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:45:11,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:11,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:45:11,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:11,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:45:11,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:45:11,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:45:11,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:11,747 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 01:45:11,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [7465411] [2020-10-27 01:45:11,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:45:11,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:45:11,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507793284] [2020-10-27 01:45:11,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:45:11,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:45:11,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:45:11,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:45:11,750 INFO L87 Difference]: Start difference. First operand 39 states and 52 transitions. Second operand 8 states. [2020-10-27 01:45:12,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:45:12,075 INFO L93 Difference]: Finished difference Result 53 states and 66 transitions. [2020-10-27 01:45:12,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:45:12,075 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-10-27 01:45:12,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:45:12,076 INFO L225 Difference]: With dead ends: 53 [2020-10-27 01:45:12,076 INFO L226 Difference]: Without dead ends: 44 [2020-10-27 01:45:12,077 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:45:12,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-27 01:45:12,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2020-10-27 01:45:12,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-27 01:45:12,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 53 transitions. [2020-10-27 01:45:12,093 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 53 transitions. Word has length 20 [2020-10-27 01:45:12,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:45:12,093 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 53 transitions. [2020-10-27 01:45:12,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:45:12,093 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 53 transitions. [2020-10-27 01:45:12,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 01:45:12,096 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:45:12,096 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:45:12,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 01:45:12,097 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:45:12,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:45:12,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1708698573, now seen corresponding path program 4 times [2020-10-27 01:45:12,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:45:12,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [658885379] [2020-10-27 01:45:12,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:45:12,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:12,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:12,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:12,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:12,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:12,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 01:45:12,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:45:12,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 431 [2020-10-27 01:45:12,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:12,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:45:12,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:45:12,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:45:12,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:12,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:45:12,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:12,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:12,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:12,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:45:12,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:12,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:45:12,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:12,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:45:12,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:45:12,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:45:12,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:12,698 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:45:12,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [658885379] [2020-10-27 01:45:12,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:45:12,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:45:12,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778717956] [2020-10-27 01:45:12,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:45:12,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:45:12,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:45:12,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:45:12,700 INFO L87 Difference]: Start difference. First operand 40 states and 53 transitions. Second operand 9 states. [2020-10-27 01:45:13,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:45:13,153 INFO L93 Difference]: Finished difference Result 62 states and 85 transitions. [2020-10-27 01:45:13,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:45:13,154 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2020-10-27 01:45:13,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:45:13,156 INFO L225 Difference]: With dead ends: 62 [2020-10-27 01:45:13,156 INFO L226 Difference]: Without dead ends: 55 [2020-10-27 01:45:13,157 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:45:13,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-27 01:45:13,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2020-10-27 01:45:13,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-27 01:45:13,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 59 transitions. [2020-10-27 01:45:13,167 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 59 transitions. Word has length 20 [2020-10-27 01:45:13,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:45:13,168 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 59 transitions. [2020-10-27 01:45:13,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:45:13,168 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 59 transitions. [2020-10-27 01:45:13,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 01:45:13,169 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:45:13,169 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:45:13,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 01:45:13,169 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:45:13,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:45:13,170 INFO L82 PathProgramCache]: Analyzing trace with hash 2084304327, now seen corresponding path program 4 times [2020-10-27 01:45:13,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:45:13,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [200497806] [2020-10-27 01:45:13,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:45:13,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:13,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:13,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:13,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 01:45:13,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:13,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 181 [2020-10-27 01:45:13,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:13,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:45:13,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 01:45:13,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 01:45:13,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:13,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:45:13,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:13,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:13,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:13,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:45:13,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:13,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:45:13,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:13,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:45:13,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:45:13,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:45:13,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:13,489 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 01:45:13,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [200497806] [2020-10-27 01:45:13,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:45:13,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:45:13,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367500313] [2020-10-27 01:45:13,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:45:13,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:45:13,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:45:13,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:45:13,491 INFO L87 Difference]: Start difference. First operand 44 states and 59 transitions. Second operand 8 states. [2020-10-27 01:45:13,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:45:13,831 INFO L93 Difference]: Finished difference Result 78 states and 104 transitions. [2020-10-27 01:45:13,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:45:13,832 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-10-27 01:45:13,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:45:13,833 INFO L225 Difference]: With dead ends: 78 [2020-10-27 01:45:13,833 INFO L226 Difference]: Without dead ends: 69 [2020-10-27 01:45:13,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:45:13,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-27 01:45:13,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 49. [2020-10-27 01:45:13,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-27 01:45:13,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 67 transitions. [2020-10-27 01:45:13,847 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 67 transitions. Word has length 21 [2020-10-27 01:45:13,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:45:13,847 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 67 transitions. [2020-10-27 01:45:13,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:45:13,847 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 67 transitions. [2020-10-27 01:45:13,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 01:45:13,848 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:45:13,848 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:45:13,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 01:45:13,848 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:45:13,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:45:13,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1913349483, now seen corresponding path program 5 times [2020-10-27 01:45:13,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:45:13,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [940528548] [2020-10-27 01:45:13,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:45:13,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:13,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:13,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:14,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:14,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 01:45:14,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:45:14,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 192 [2020-10-27 01:45:14,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:14,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:45:14,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:45:14,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:45:14,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:14,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:45:14,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:14,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:14,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:14,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:45:14,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:14,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:45:14,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:14,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:45:14,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:45:14,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:45:14,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:14,167 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-27 01:45:14,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [940528548] [2020-10-27 01:45:14,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:45:14,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:45:14,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238004765] [2020-10-27 01:45:14,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:45:14,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:45:14,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:45:14,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:45:14,169 INFO L87 Difference]: Start difference. First operand 49 states and 67 transitions. Second operand 8 states. [2020-10-27 01:45:14,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:45:14,521 INFO L93 Difference]: Finished difference Result 65 states and 83 transitions. [2020-10-27 01:45:14,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:45:14,522 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-10-27 01:45:14,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:45:14,523 INFO L225 Difference]: With dead ends: 65 [2020-10-27 01:45:14,523 INFO L226 Difference]: Without dead ends: 55 [2020-10-27 01:45:14,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:45:14,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-27 01:45:14,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 50. [2020-10-27 01:45:14,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-27 01:45:14,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 68 transitions. [2020-10-27 01:45:14,536 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 68 transitions. Word has length 21 [2020-10-27 01:45:14,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:45:14,536 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 68 transitions. [2020-10-27 01:45:14,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:45:14,536 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 68 transitions. [2020-10-27 01:45:14,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 01:45:14,538 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:45:14,538 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:45:14,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 01:45:14,539 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:45:14,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:45:14,539 INFO L82 PathProgramCache]: Analyzing trace with hash 105015381, now seen corresponding path program 6 times [2020-10-27 01:45:14,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:45:14,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1496062899] [2020-10-27 01:45:14,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:45:14,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:14,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:14,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:14,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:15,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:15,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 01:45:15,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:45:15,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 540 [2020-10-27 01:45:15,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:15,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:45:15,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:45:15,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 01:45:15,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:15,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:45:15,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:15,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:15,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:15,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:45:15,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:15,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:45:15,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:15,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:45:15,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:45:15,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:45:15,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:15,263 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 01:45:15,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1496062899] [2020-10-27 01:45:15,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:45:15,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:45:15,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178687123] [2020-10-27 01:45:15,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:45:15,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:45:15,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:45:15,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:45:15,267 INFO L87 Difference]: Start difference. First operand 50 states and 68 transitions. Second operand 10 states. [2020-10-27 01:45:15,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:45:15,765 INFO L93 Difference]: Finished difference Result 77 states and 109 transitions. [2020-10-27 01:45:15,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:45:15,766 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2020-10-27 01:45:15,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:45:15,767 INFO L225 Difference]: With dead ends: 77 [2020-10-27 01:45:15,767 INFO L226 Difference]: Without dead ends: 70 [2020-10-27 01:45:15,768 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:45:15,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-27 01:45:15,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 54. [2020-10-27 01:45:15,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-27 01:45:15,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 74 transitions. [2020-10-27 01:45:15,781 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 74 transitions. Word has length 21 [2020-10-27 01:45:15,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:45:15,781 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 74 transitions. [2020-10-27 01:45:15,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:45:15,781 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 74 transitions. [2020-10-27 01:45:15,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 01:45:15,782 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:45:15,782 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:45:15,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 01:45:15,782 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:45:15,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:45:15,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1407661564, now seen corresponding path program 5 times [2020-10-27 01:45:15,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:45:15,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1451749913] [2020-10-27 01:45:15,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:45:15,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:15,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:15,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:16,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:16,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 01:45:16,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:45:16,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 689 [2020-10-27 01:45:16,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:16,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:45:16,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:45:16,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:45:16,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:16,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:45:16,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:16,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:16,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:16,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:45:16,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:16,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:45:16,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:16,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:45:16,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:45:16,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:45:16,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:16,663 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 01:45:16,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1451749913] [2020-10-27 01:45:16,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:45:16,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:45:16,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496219201] [2020-10-27 01:45:16,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:45:16,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:45:16,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:45:16,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:45:16,670 INFO L87 Difference]: Start difference. First operand 54 states and 74 transitions. Second operand 9 states. [2020-10-27 01:45:17,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:45:17,001 INFO L93 Difference]: Finished difference Result 63 states and 82 transitions. [2020-10-27 01:45:17,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:45:17,002 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-10-27 01:45:17,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:45:17,002 INFO L225 Difference]: With dead ends: 63 [2020-10-27 01:45:17,002 INFO L226 Difference]: Without dead ends: 49 [2020-10-27 01:45:17,004 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:45:17,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-27 01:45:17,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-27 01:45:17,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-27 01:45:17,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 67 transitions. [2020-10-27 01:45:17,015 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 67 transitions. Word has length 22 [2020-10-27 01:45:17,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:45:17,016 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 67 transitions. [2020-10-27 01:45:17,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:45:17,016 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 67 transitions. [2020-10-27 01:45:17,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 01:45:17,017 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:45:17,017 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 01:45:17,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 01:45:17,017 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:45:17,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:45:17,018 INFO L82 PathProgramCache]: Analyzing trace with hash 845817524, now seen corresponding path program 6 times [2020-10-27 01:45:17,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:45:17,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1634677792] [2020-10-27 01:45:17,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:45:17,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:17,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:17,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:17,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:17,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 01:45:17,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:45:17,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 425 [2020-10-27 01:45:17,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:17,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:45:17,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:45:17,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:45:17,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:17,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:45:17,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:17,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:17,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:17,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:45:17,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:17,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:45:17,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:17,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:45:17,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:45:17,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:45:17,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:17,598 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-27 01:45:17,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1634677792] [2020-10-27 01:45:17,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:45:17,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:45:17,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437815638] [2020-10-27 01:45:17,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:45:17,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:45:17,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:45:17,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:45:17,601 INFO L87 Difference]: Start difference. First operand 49 states and 67 transitions. Second operand 9 states. [2020-10-27 01:45:17,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:45:17,968 INFO L93 Difference]: Finished difference Result 65 states and 83 transitions. [2020-10-27 01:45:17,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:45:17,969 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-10-27 01:45:17,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:45:17,970 INFO L225 Difference]: With dead ends: 65 [2020-10-27 01:45:17,970 INFO L226 Difference]: Without dead ends: 55 [2020-10-27 01:45:17,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:45:17,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-27 01:45:17,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 50. [2020-10-27 01:45:17,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-27 01:45:17,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 68 transitions. [2020-10-27 01:45:17,982 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 68 transitions. Word has length 22 [2020-10-27 01:45:17,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:45:17,982 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 68 transitions. [2020-10-27 01:45:17,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:45:17,982 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 68 transitions. [2020-10-27 01:45:17,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 01:45:17,983 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:45:17,983 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:45:17,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 01:45:17,983 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:45:17,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:45:17,984 INFO L82 PathProgramCache]: Analyzing trace with hash 495573107, now seen corresponding path program 7 times [2020-10-27 01:45:17,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:45:17,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1132124429] [2020-10-27 01:45:17,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:45:17,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:18,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:18,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:18,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:18,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:18,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 01:45:18,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:45:18,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 601 [2020-10-27 01:45:18,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:18,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:45:18,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:45:18,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:45:18,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:18,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:45:18,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:18,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:18,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:18,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:45:18,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:18,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 01:45:18,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:18,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:45:18,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:45:18,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:45:18,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:18,808 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:45:18,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1132124429] [2020-10-27 01:45:18,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:45:18,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:45:18,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339429092] [2020-10-27 01:45:18,812 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:45:18,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:45:18,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:45:18,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:45:18,814 INFO L87 Difference]: Start difference. First operand 50 states and 68 transitions. Second operand 11 states. [2020-10-27 01:45:19,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:45:19,463 INFO L93 Difference]: Finished difference Result 69 states and 94 transitions. [2020-10-27 01:45:19,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:45:19,464 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 22 [2020-10-27 01:45:19,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:45:19,465 INFO L225 Difference]: With dead ends: 69 [2020-10-27 01:45:19,465 INFO L226 Difference]: Without dead ends: 61 [2020-10-27 01:45:19,466 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:45:19,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-27 01:45:19,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2020-10-27 01:45:19,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-27 01:45:19,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 62 transitions. [2020-10-27 01:45:19,478 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 62 transitions. Word has length 22 [2020-10-27 01:45:19,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:45:19,479 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 62 transitions. [2020-10-27 01:45:19,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:45:19,479 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 62 transitions. [2020-10-27 01:45:19,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 01:45:19,482 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:45:19,483 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:45:19,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 01:45:19,483 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:45:19,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:45:19,483 INFO L82 PathProgramCache]: Analyzing trace with hash 480648821, now seen corresponding path program 7 times [2020-10-27 01:45:19,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:45:19,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1639792836] [2020-10-27 01:45:19,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:45:19,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:19,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:19,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:20,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:20,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 01:45:20,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:45:20,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 602 [2020-10-27 01:45:20,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:20,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:45:20,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:45:20,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 01:45:20,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:20,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:45:20,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:20,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:20,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:20,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:45:20,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:20,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:45:20,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:20,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:45:20,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:45:20,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:45:20,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:20,246 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-27 01:45:20,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1639792836] [2020-10-27 01:45:20,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:45:20,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:45:20,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006480220] [2020-10-27 01:45:20,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:45:20,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:45:20,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:45:20,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:45:20,252 INFO L87 Difference]: Start difference. First operand 47 states and 62 transitions. Second operand 10 states. [2020-10-27 01:45:20,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:45:20,693 INFO L93 Difference]: Finished difference Result 63 states and 78 transitions. [2020-10-27 01:45:20,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:45:20,694 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2020-10-27 01:45:20,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:45:20,695 INFO L225 Difference]: With dead ends: 63 [2020-10-27 01:45:20,695 INFO L226 Difference]: Without dead ends: 53 [2020-10-27 01:45:20,696 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:45:20,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-27 01:45:20,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 48. [2020-10-27 01:45:20,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-27 01:45:20,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 63 transitions. [2020-10-27 01:45:20,707 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 63 transitions. Word has length 23 [2020-10-27 01:45:20,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:45:20,708 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 63 transitions. [2020-10-27 01:45:20,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:45:20,708 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 63 transitions. [2020-10-27 01:45:20,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 01:45:20,708 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:45:20,708 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:45:20,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 01:45:20,709 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:45:20,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:45:20,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1107432295, now seen corresponding path program 8 times [2020-10-27 01:45:20,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:45:20,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [45300454] [2020-10-27 01:45:20,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:45:20,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:20,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:20,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:20,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:20,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 01:45:20,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:45:20,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 194 [2020-10-27 01:45:20,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:20,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:45:20,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:45:20,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:45:20,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:21,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:45:21,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:21,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:21,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:21,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:45:21,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:21,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:45:21,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:21,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:45:21,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:45:21,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:45:21,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:21,043 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-27 01:45:21,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [45300454] [2020-10-27 01:45:21,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:45:21,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:45:21,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144858638] [2020-10-27 01:45:21,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:45:21,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:45:21,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:45:21,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:45:21,045 INFO L87 Difference]: Start difference. First operand 48 states and 63 transitions. Second operand 9 states. [2020-10-27 01:45:21,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:45:21,417 INFO L93 Difference]: Finished difference Result 66 states and 81 transitions. [2020-10-27 01:45:21,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:45:21,417 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2020-10-27 01:45:21,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:45:21,418 INFO L225 Difference]: With dead ends: 66 [2020-10-27 01:45:21,418 INFO L226 Difference]: Without dead ends: 55 [2020-10-27 01:45:21,419 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:45:21,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-27 01:45:21,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2020-10-27 01:45:21,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-27 01:45:21,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 64 transitions. [2020-10-27 01:45:21,428 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 64 transitions. Word has length 23 [2020-10-27 01:45:21,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:45:21,428 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 64 transitions. [2020-10-27 01:45:21,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:45:21,429 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 64 transitions. [2020-10-27 01:45:21,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 01:45:21,429 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:45:21,429 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:45:21,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 01:45:21,429 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:45:21,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:45:21,430 INFO L82 PathProgramCache]: Analyzing trace with hash -282039275, now seen corresponding path program 9 times [2020-10-27 01:45:21,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:45:21,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1800671753] [2020-10-27 01:45:21,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:45:21,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:21,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:21,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:21,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:22,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:22,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 01:45:22,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:45:22,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 823 [2020-10-27 01:45:22,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:22,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:45:22,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:45:22,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 01:45:22,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:22,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:45:22,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:22,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:22,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:22,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:45:22,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:22,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:45:22,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:22,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:45:22,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:45:22,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:45:22,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:22,465 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:45:22,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1800671753] [2020-10-27 01:45:22,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:45:22,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:45:22,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381747847] [2020-10-27 01:45:22,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:45:22,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:45:22,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:45:22,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:45:22,470 INFO L87 Difference]: Start difference. First operand 49 states and 64 transitions. Second operand 12 states. [2020-10-27 01:45:23,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:45:23,189 INFO L93 Difference]: Finished difference Result 77 states and 108 transitions. [2020-10-27 01:45:23,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:45:23,189 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2020-10-27 01:45:23,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:45:23,190 INFO L225 Difference]: With dead ends: 77 [2020-10-27 01:45:23,190 INFO L226 Difference]: Without dead ends: 69 [2020-10-27 01:45:23,191 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:45:23,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-27 01:45:23,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 54. [2020-10-27 01:45:23,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-27 01:45:23,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 71 transitions. [2020-10-27 01:45:23,202 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 71 transitions. Word has length 23 [2020-10-27 01:45:23,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:45:23,203 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 71 transitions. [2020-10-27 01:45:23,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:45:23,203 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 71 transitions. [2020-10-27 01:45:23,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 01:45:23,204 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:45:23,204 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:45:23,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 01:45:23,205 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:45:23,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:45:23,205 INFO L82 PathProgramCache]: Analyzing trace with hash 2045320916, now seen corresponding path program 8 times [2020-10-27 01:45:23,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:45:23,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1975509414] [2020-10-27 01:45:23,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:45:23,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:23,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:23,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:23,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 01:45:23,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:23,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 219 [2020-10-27 01:45:23,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:23,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:45:23,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 01:45:23,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 01:45:23,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:23,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:45:23,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:23,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:23,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:23,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:45:23,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:23,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:45:23,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:23,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:45:23,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:45:23,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:45:23,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:23,572 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-27 01:45:23,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1975509414] [2020-10-27 01:45:23,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:45:23,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:45:23,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844634794] [2020-10-27 01:45:23,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:45:23,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:45:23,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:45:23,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:45:23,574 INFO L87 Difference]: Start difference. First operand 54 states and 71 transitions. Second operand 9 states. [2020-10-27 01:45:24,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:45:24,002 INFO L93 Difference]: Finished difference Result 107 states and 142 transitions. [2020-10-27 01:45:24,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:45:24,003 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-10-27 01:45:24,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:45:24,004 INFO L225 Difference]: With dead ends: 107 [2020-10-27 01:45:24,004 INFO L226 Difference]: Without dead ends: 97 [2020-10-27 01:45:24,005 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:45:24,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-27 01:45:24,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 57. [2020-10-27 01:45:24,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-27 01:45:24,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 76 transitions. [2020-10-27 01:45:24,019 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 76 transitions. Word has length 24 [2020-10-27 01:45:24,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:45:24,019 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 76 transitions. [2020-10-27 01:45:24,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:45:24,019 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 76 transitions. [2020-10-27 01:45:24,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 01:45:24,021 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:45:24,021 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 01:45:24,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 01:45:24,021 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:45:24,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:45:24,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1111271388, now seen corresponding path program 9 times [2020-10-27 01:45:24,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:45:24,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1408593811] [2020-10-27 01:45:24,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:45:24,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:24,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:24,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:24,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:24,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 01:45:24,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:45:24,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 450 [2020-10-27 01:45:24,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:24,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:45:24,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:45:24,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 01:45:24,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:24,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:45:24,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:24,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:24,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:24,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:45:24,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:24,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:45:24,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:24,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:45:24,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:45:24,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:45:24,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:24,647 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-27 01:45:24,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1408593811] [2020-10-27 01:45:24,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:45:24,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:45:24,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147913690] [2020-10-27 01:45:24,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:45:24,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:45:24,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:45:24,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:45:24,650 INFO L87 Difference]: Start difference. First operand 57 states and 76 transitions. Second operand 10 states. [2020-10-27 01:45:25,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:45:25,146 INFO L93 Difference]: Finished difference Result 75 states and 94 transitions. [2020-10-27 01:45:25,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:45:25,147 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-10-27 01:45:25,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:45:25,148 INFO L225 Difference]: With dead ends: 75 [2020-10-27 01:45:25,148 INFO L226 Difference]: Without dead ends: 64 [2020-10-27 01:45:25,149 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:45:25,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-27 01:45:25,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 58. [2020-10-27 01:45:25,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-27 01:45:25,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 77 transitions. [2020-10-27 01:45:25,161 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 77 transitions. Word has length 24 [2020-10-27 01:45:25,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:45:25,161 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 77 transitions. [2020-10-27 01:45:25,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:45:25,161 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 77 transitions. [2020-10-27 01:45:25,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 01:45:25,162 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:45:25,162 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:45:25,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 01:45:25,162 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:45:25,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:45:25,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1381780659, now seen corresponding path program 10 times [2020-10-27 01:45:25,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:45:25,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [828918830] [2020-10-27 01:45:25,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:45:25,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:25,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:25,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:25,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:26,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:26,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 01:45:26,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:45:26,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 875 [2020-10-27 01:45:26,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:26,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:45:26,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:45:26,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:45:26,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:26,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:45:26,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:26,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:26,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:26,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:45:26,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:26,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:45:26,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:26,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:45:26,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:45:26,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:45:26,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:26,309 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:45:26,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [828918830] [2020-10-27 01:45:26,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:45:26,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:45:26,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024891777] [2020-10-27 01:45:26,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:45:26,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:45:26,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:45:26,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:45:26,314 INFO L87 Difference]: Start difference. First operand 58 states and 77 transitions. Second operand 13 states. [2020-10-27 01:45:27,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:45:27,150 INFO L93 Difference]: Finished difference Result 104 states and 154 transitions. [2020-10-27 01:45:27,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:45:27,152 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2020-10-27 01:45:27,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:45:27,154 INFO L225 Difference]: With dead ends: 104 [2020-10-27 01:45:27,154 INFO L226 Difference]: Without dead ends: 97 [2020-10-27 01:45:27,157 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:45:27,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-27 01:45:27,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 72. [2020-10-27 01:45:27,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-27 01:45:27,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 99 transitions. [2020-10-27 01:45:27,175 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 99 transitions. Word has length 24 [2020-10-27 01:45:27,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:45:27,175 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 99 transitions. [2020-10-27 01:45:27,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:45:27,175 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 99 transitions. [2020-10-27 01:45:27,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 01:45:27,177 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:45:27,177 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:45:27,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 01:45:27,177 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:45:27,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:45:27,177 INFO L82 PathProgramCache]: Analyzing trace with hash -989451691, now seen corresponding path program 10 times [2020-10-27 01:45:27,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:45:27,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1510032196] [2020-10-27 01:45:27,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:45:27,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:27,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:27,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:28,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:28,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 01:45:28,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:45:28,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1014 [2020-10-27 01:45:28,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:28,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:45:28,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:45:28,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:45:28,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:28,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:45:28,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:28,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:28,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:28,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:45:28,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:28,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:45:28,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:28,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:45:28,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:45:28,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:45:28,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:28,398 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-27 01:45:28,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1510032196] [2020-10-27 01:45:28,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:45:28,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:45:28,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560738546] [2020-10-27 01:45:28,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:45:28,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:45:28,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:45:28,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:45:28,404 INFO L87 Difference]: Start difference. First operand 72 states and 99 transitions. Second operand 11 states. [2020-10-27 01:45:28,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:45:28,869 INFO L93 Difference]: Finished difference Result 82 states and 108 transitions. [2020-10-27 01:45:28,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:45:28,870 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2020-10-27 01:45:28,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:45:28,871 INFO L225 Difference]: With dead ends: 82 [2020-10-27 01:45:28,871 INFO L226 Difference]: Without dead ends: 66 [2020-10-27 01:45:28,871 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:45:28,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-27 01:45:28,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-10-27 01:45:28,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-27 01:45:28,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 91 transitions. [2020-10-27 01:45:28,882 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 91 transitions. Word has length 25 [2020-10-27 01:45:28,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:45:28,882 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 91 transitions. [2020-10-27 01:45:28,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:45:28,883 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 91 transitions. [2020-10-27 01:45:28,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 01:45:28,883 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:45:28,883 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:45:28,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 01:45:28,883 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:45:28,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:45:28,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1171608825, now seen corresponding path program 11 times [2020-10-27 01:45:28,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:45:28,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1632181526] [2020-10-27 01:45:28,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:45:28,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:28,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:28,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:29,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:29,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 01:45:29,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:45:29,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 685 [2020-10-27 01:45:29,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:29,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:45:29,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:45:29,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:45:29,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:29,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:45:29,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:29,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:29,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:29,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:45:29,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:29,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:45:29,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:29,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:45:29,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:45:29,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:45:29,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:29,741 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-27 01:45:29,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1632181526] [2020-10-27 01:45:29,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:45:29,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:45:29,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176757867] [2020-10-27 01:45:29,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:45:29,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:45:29,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:45:29,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:45:29,743 INFO L87 Difference]: Start difference. First operand 66 states and 91 transitions. Second operand 11 states. [2020-10-27 01:45:30,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:45:30,246 INFO L93 Difference]: Finished difference Result 84 states and 109 transitions. [2020-10-27 01:45:30,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:45:30,246 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2020-10-27 01:45:30,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:45:30,247 INFO L225 Difference]: With dead ends: 84 [2020-10-27 01:45:30,247 INFO L226 Difference]: Without dead ends: 73 [2020-10-27 01:45:30,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:45:30,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-27 01:45:30,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 67. [2020-10-27 01:45:30,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-27 01:45:30,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 92 transitions. [2020-10-27 01:45:30,265 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 92 transitions. Word has length 25 [2020-10-27 01:45:30,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:45:30,266 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 92 transitions. [2020-10-27 01:45:30,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:45:30,266 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 92 transitions. [2020-10-27 01:45:30,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 01:45:30,266 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:45:30,266 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:45:30,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 01:45:30,268 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:45:30,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:45:30,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1078809685, now seen corresponding path program 11 times [2020-10-27 01:45:30,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:45:30,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [811599473] [2020-10-27 01:45:30,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:45:30,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:30,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:30,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:30,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:30,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 01:45:30,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:45:30,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 231 [2020-10-27 01:45:30,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:30,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:45:30,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:45:30,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 01:45:30,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:30,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:45:30,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:30,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:30,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:30,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:45:30,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:30,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:45:30,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:30,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:45:30,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:45:30,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:45:30,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:30,662 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-27 01:45:30,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [811599473] [2020-10-27 01:45:30,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:45:30,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:45:30,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699317364] [2020-10-27 01:45:30,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:45:30,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:45:30,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:45:30,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:45:30,664 INFO L87 Difference]: Start difference. First operand 67 states and 92 transitions. Second operand 10 states. [2020-10-27 01:45:31,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:45:31,143 INFO L93 Difference]: Finished difference Result 87 states and 112 transitions. [2020-10-27 01:45:31,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:45:31,143 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2020-10-27 01:45:31,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:45:31,144 INFO L225 Difference]: With dead ends: 87 [2020-10-27 01:45:31,144 INFO L226 Difference]: Without dead ends: 75 [2020-10-27 01:45:31,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:45:31,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-27 01:45:31,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 68. [2020-10-27 01:45:31,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-27 01:45:31,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 93 transitions. [2020-10-27 01:45:31,158 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 93 transitions. Word has length 25 [2020-10-27 01:45:31,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:45:31,158 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 93 transitions. [2020-10-27 01:45:31,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:45:31,158 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 93 transitions. [2020-10-27 01:45:31,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 01:45:31,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:45:31,159 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:45:31,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 01:45:31,159 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:45:31,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:45:31,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1420591061, now seen corresponding path program 12 times [2020-10-27 01:45:31,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:45:31,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1655866524] [2020-10-27 01:45:31,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:45:31,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:31,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:31,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:31,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:32,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:32,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 01:45:32,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:45:32,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 979 [2020-10-27 01:45:32,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:32,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:45:32,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:45:32,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 01:45:32,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:32,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:45:32,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:32,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:32,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:32,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:45:32,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:32,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:45:32,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:32,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:45:32,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:45:32,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:45:32,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:32,388 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:45:32,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1655866524] [2020-10-27 01:45:32,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:45:32,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:45:32,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809132800] [2020-10-27 01:45:32,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:45:32,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:45:32,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:45:32,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:45:32,391 INFO L87 Difference]: Start difference. First operand 68 states and 93 transitions. Second operand 14 states. [2020-10-27 01:45:33,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:45:33,319 INFO L93 Difference]: Finished difference Result 104 states and 151 transitions. [2020-10-27 01:45:33,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:45:33,320 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 25 [2020-10-27 01:45:33,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:45:33,321 INFO L225 Difference]: With dead ends: 104 [2020-10-27 01:45:33,321 INFO L226 Difference]: Without dead ends: 97 [2020-10-27 01:45:33,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:45:33,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-27 01:45:33,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 72. [2020-10-27 01:45:33,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-27 01:45:33,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 99 transitions. [2020-10-27 01:45:33,334 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 99 transitions. Word has length 25 [2020-10-27 01:45:33,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:45:33,335 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 99 transitions. [2020-10-27 01:45:33,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:45:33,335 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 99 transitions. [2020-10-27 01:45:33,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 01:45:33,336 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:45:33,336 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:45:33,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 01:45:33,336 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:45:33,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:45:33,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1252897924, now seen corresponding path program 12 times [2020-10-27 01:45:33,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:45:33,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1922476281] [2020-10-27 01:45:33,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:45:33,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:33,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:33,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:34,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:34,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 01:45:34,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:45:34,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1022 [2020-10-27 01:45:34,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:34,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:45:34,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:45:34,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 01:45:34,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:34,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:45:34,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:34,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:34,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:34,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:45:34,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:34,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:45:34,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:34,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:45:34,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:45:34,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:45:34,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:34,581 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-27 01:45:34,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1922476281] [2020-10-27 01:45:34,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:45:34,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:45:34,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990448432] [2020-10-27 01:45:34,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:45:34,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:45:34,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:45:34,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:45:34,583 INFO L87 Difference]: Start difference. First operand 72 states and 99 transitions. Second operand 12 states. [2020-10-27 01:45:35,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:45:35,168 INFO L93 Difference]: Finished difference Result 90 states and 117 transitions. [2020-10-27 01:45:35,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:45:35,169 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 26 [2020-10-27 01:45:35,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:45:35,170 INFO L225 Difference]: With dead ends: 90 [2020-10-27 01:45:35,170 INFO L226 Difference]: Without dead ends: 79 [2020-10-27 01:45:35,170 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:45:35,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-27 01:45:35,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 73. [2020-10-27 01:45:35,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-27 01:45:35,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 100 transitions. [2020-10-27 01:45:35,185 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 100 transitions. Word has length 26 [2020-10-27 01:45:35,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:45:35,185 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 100 transitions. [2020-10-27 01:45:35,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:45:35,185 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 100 transitions. [2020-10-27 01:45:35,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 01:45:35,186 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:45:35,186 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 01:45:35,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 01:45:35,186 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:45:35,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:45:35,186 INFO L82 PathProgramCache]: Analyzing trace with hash -2112182988, now seen corresponding path program 13 times [2020-10-27 01:45:35,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:45:35,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [114141705] [2020-10-27 01:45:35,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:45:35,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:35,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:35,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:35,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:35,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 01:45:35,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:45:35,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 423 [2020-10-27 01:45:35,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:35,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:45:35,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:45:35,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:45:35,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:35,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:45:35,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:35,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:35,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:35,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:45:35,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:35,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:45:35,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:35,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:45:35,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:45:35,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:45:35,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:35,783 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-27 01:45:35,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [114141705] [2020-10-27 01:45:35,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:45:35,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:45:35,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124880192] [2020-10-27 01:45:35,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:45:35,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:45:35,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:45:35,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:45:35,785 INFO L87 Difference]: Start difference. First operand 73 states and 100 transitions. Second operand 11 states. [2020-10-27 01:45:36,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:45:36,412 INFO L93 Difference]: Finished difference Result 93 states and 120 transitions. [2020-10-27 01:45:36,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:45:36,412 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2020-10-27 01:45:36,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:45:36,414 INFO L225 Difference]: With dead ends: 93 [2020-10-27 01:45:36,414 INFO L226 Difference]: Without dead ends: 81 [2020-10-27 01:45:36,414 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:45:36,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-27 01:45:36,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2020-10-27 01:45:36,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-27 01:45:36,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 101 transitions. [2020-10-27 01:45:36,427 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 101 transitions. Word has length 26 [2020-10-27 01:45:36,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:45:36,427 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 101 transitions. [2020-10-27 01:45:36,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:45:36,427 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 101 transitions. [2020-10-27 01:45:36,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 01:45:36,428 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:45:36,428 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:45:36,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 01:45:36,428 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:45:36,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:45:36,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1671253773, now seen corresponding path program 13 times [2020-10-27 01:45:36,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:45:36,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1988933221] [2020-10-27 01:45:36,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:45:36,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:36,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:36,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:36,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:37,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:37,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 01:45:37,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:45:37,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1018 [2020-10-27 01:45:37,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:37,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:45:37,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:45:37,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:45:37,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:37,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:45:37,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:37,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:37,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:37,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:45:37,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:37,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:45:37,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:37,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:45:37,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:45:37,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:45:37,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:37,716 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:45:37,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1988933221] [2020-10-27 01:45:37,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:45:37,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:45:37,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072920447] [2020-10-27 01:45:37,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:45:37,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:45:37,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:45:37,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:45:37,719 INFO L87 Difference]: Start difference. First operand 74 states and 101 transitions. Second operand 15 states. [2020-10-27 01:45:38,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:45:38,887 INFO L93 Difference]: Finished difference Result 111 states and 161 transitions. [2020-10-27 01:45:38,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:45:38,888 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 26 [2020-10-27 01:45:38,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:45:38,889 INFO L225 Difference]: With dead ends: 111 [2020-10-27 01:45:38,889 INFO L226 Difference]: Without dead ends: 104 [2020-10-27 01:45:38,890 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:45:38,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-27 01:45:38,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 78. [2020-10-27 01:45:38,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-27 01:45:38,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 107 transitions. [2020-10-27 01:45:38,903 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 107 transitions. Word has length 26 [2020-10-27 01:45:38,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:45:38,903 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 107 transitions. [2020-10-27 01:45:38,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:45:38,904 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 107 transitions. [2020-10-27 01:45:38,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 01:45:38,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:45:38,904 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:45:38,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 01:45:38,905 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:45:38,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:45:38,905 INFO L82 PathProgramCache]: Analyzing trace with hash -896804185, now seen corresponding path program 14 times [2020-10-27 01:45:38,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:45:38,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1099352779] [2020-10-27 01:45:38,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:45:38,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:38,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:39,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:39,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 01:45:39,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:39,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 296 [2020-10-27 01:45:39,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:39,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:45:39,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 01:45:39,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 01:45:39,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:39,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:45:39,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:39,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:39,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:39,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:45:39,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:39,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:45:39,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:39,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:45:39,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:45:39,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:45:39,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:39,391 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-27 01:45:39,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1099352779] [2020-10-27 01:45:39,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:45:39,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:45:39,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788592324] [2020-10-27 01:45:39,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:45:39,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:45:39,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:45:39,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:45:39,394 INFO L87 Difference]: Start difference. First operand 78 states and 107 transitions. Second operand 10 states. [2020-10-27 01:45:39,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:45:39,995 INFO L93 Difference]: Finished difference Result 169 states and 231 transitions. [2020-10-27 01:45:39,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:45:39,995 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-27 01:45:39,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:45:39,997 INFO L225 Difference]: With dead ends: 169 [2020-10-27 01:45:39,997 INFO L226 Difference]: Without dead ends: 158 [2020-10-27 01:45:39,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:45:39,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-27 01:45:40,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 83. [2020-10-27 01:45:40,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-27 01:45:40,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 115 transitions. [2020-10-27 01:45:40,017 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 115 transitions. Word has length 27 [2020-10-27 01:45:40,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:45:40,017 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 115 transitions. [2020-10-27 01:45:40,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:45:40,018 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 115 transitions. [2020-10-27 01:45:40,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 01:45:40,018 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:45:40,018 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:45:40,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 01:45:40,018 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:45:40,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:45:40,019 INFO L82 PathProgramCache]: Analyzing trace with hash 2046259253, now seen corresponding path program 15 times [2020-10-27 01:45:40,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:45:40,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1367888689] [2020-10-27 01:45:40,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:45:40,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:40,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:40,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:41,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:41,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 01:45:41,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:45:41,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1109 [2020-10-27 01:45:41,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:41,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:45:41,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:45:41,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 01:45:41,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:41,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:45:41,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:41,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:41,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:41,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:45:41,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:41,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:45:41,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:41,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:45:41,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:45:41,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:45:41,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:41,369 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-27 01:45:41,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1367888689] [2020-10-27 01:45:41,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:45:41,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:45:41,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173317217] [2020-10-27 01:45:41,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:45:41,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:45:41,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:45:41,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:45:41,371 INFO L87 Difference]: Start difference. First operand 83 states and 115 transitions. Second operand 12 states. [2020-10-27 01:45:42,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:45:42,090 INFO L93 Difference]: Finished difference Result 103 states and 135 transitions. [2020-10-27 01:45:42,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:45:42,092 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2020-10-27 01:45:42,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:45:42,094 INFO L225 Difference]: With dead ends: 103 [2020-10-27 01:45:42,094 INFO L226 Difference]: Without dead ends: 91 [2020-10-27 01:45:42,095 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:45:42,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-27 01:45:42,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 84. [2020-10-27 01:45:42,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-27 01:45:42,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 116 transitions. [2020-10-27 01:45:42,110 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 116 transitions. Word has length 27 [2020-10-27 01:45:42,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:45:42,113 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 116 transitions. [2020-10-27 01:45:42,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:45:42,113 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 116 transitions. [2020-10-27 01:45:42,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 01:45:42,114 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:45:42,114 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:45:42,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 01:45:42,114 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:45:42,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:45:42,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1265804181, now seen corresponding path program 14 times [2020-10-27 01:45:42,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:45:42,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [682990923] [2020-10-27 01:45:42,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:45:42,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:42,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:42,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:42,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:43,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:43,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 01:45:43,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:45:43,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1417 [2020-10-27 01:45:43,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:43,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:45:43,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:45:43,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 01:45:43,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:43,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:45:43,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:43,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:43,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:43,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:45:43,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:43,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:45:43,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:43,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:45:43,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:45:43,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:45:43,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:43,825 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:45:43,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [682990923] [2020-10-27 01:45:43,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:45:43,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:45:43,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387635219] [2020-10-27 01:45:43,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:45:43,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:45:43,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:45:43,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:45:43,828 INFO L87 Difference]: Start difference. First operand 84 states and 116 transitions. Second operand 16 states. [2020-10-27 01:45:45,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:45:45,118 INFO L93 Difference]: Finished difference Result 128 states and 189 transitions. [2020-10-27 01:45:45,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:45:45,118 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 27 [2020-10-27 01:45:45,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:45:45,119 INFO L225 Difference]: With dead ends: 128 [2020-10-27 01:45:45,120 INFO L226 Difference]: Without dead ends: 121 [2020-10-27 01:45:45,121 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:45:45,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-27 01:45:45,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 88. [2020-10-27 01:45:45,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-27 01:45:45,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 122 transitions. [2020-10-27 01:45:45,138 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 122 transitions. Word has length 27 [2020-10-27 01:45:45,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:45:45,138 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 122 transitions. [2020-10-27 01:45:45,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:45:45,138 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 122 transitions. [2020-10-27 01:45:45,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 01:45:45,139 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:45:45,139 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:45:45,139 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 01:45:45,139 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:45:45,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:45:45,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1181907172, now seen corresponding path program 16 times [2020-10-27 01:45:45,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:45:45,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1483044770] [2020-10-27 01:45:45,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:45:45,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:45,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:45,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:46,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:46,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 01:45:46,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:45:46,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1555 [2020-10-27 01:45:46,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:46,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:45:46,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:45:46,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 01:45:46,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:46,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:45:46,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:46,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:46,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:46,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:45:46,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:46,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:45:46,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:46,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:45:46,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:45:46,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:45:46,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:46,924 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-27 01:45:46,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1483044770] [2020-10-27 01:45:46,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:45:46,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:45:46,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98928891] [2020-10-27 01:45:46,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:45:46,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:45:46,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:45:46,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:45:46,925 INFO L87 Difference]: Start difference. First operand 88 states and 122 transitions. Second operand 13 states. [2020-10-27 01:45:47,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:45:47,611 INFO L93 Difference]: Finished difference Result 99 states and 132 transitions. [2020-10-27 01:45:47,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:45:47,613 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2020-10-27 01:45:47,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:45:47,614 INFO L225 Difference]: With dead ends: 99 [2020-10-27 01:45:47,614 INFO L226 Difference]: Without dead ends: 81 [2020-10-27 01:45:47,615 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:45:47,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-27 01:45:47,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-10-27 01:45:47,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-27 01:45:47,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 113 transitions. [2020-10-27 01:45:47,629 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 113 transitions. Word has length 28 [2020-10-27 01:45:47,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:45:47,629 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 113 transitions. [2020-10-27 01:45:47,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:45:47,630 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 113 transitions. [2020-10-27 01:45:47,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 01:45:47,630 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:45:47,630 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:45:47,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 01:45:47,631 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:45:47,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:45:47,631 INFO L82 PathProgramCache]: Analyzing trace with hash 2108949844, now seen corresponding path program 17 times [2020-10-27 01:45:47,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:45:47,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1885016151] [2020-10-27 01:45:47,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:45:47,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:47,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:47,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:48,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:48,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 01:45:48,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:45:48,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1194 [2020-10-27 01:45:48,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:48,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:45:48,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:45:48,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 01:45:48,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:49,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:45:49,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:49,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:49,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:49,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:45:49,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:49,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:45:49,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:49,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:45:49,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:45:49,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:45:49,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:49,049 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-27 01:45:49,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1885016151] [2020-10-27 01:45:49,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:45:49,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:45:49,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422583324] [2020-10-27 01:45:49,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:45:49,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:45:49,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:45:49,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:45:49,051 INFO L87 Difference]: Start difference. First operand 81 states and 113 transitions. Second operand 13 states. [2020-10-27 01:45:49,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:45:49,735 INFO L93 Difference]: Finished difference Result 101 states and 133 transitions. [2020-10-27 01:45:49,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:45:49,736 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2020-10-27 01:45:49,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:45:49,737 INFO L225 Difference]: With dead ends: 101 [2020-10-27 01:45:49,737 INFO L226 Difference]: Without dead ends: 89 [2020-10-27 01:45:49,738 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:45:49,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-27 01:45:49,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 82. [2020-10-27 01:45:49,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-27 01:45:49,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 114 transitions. [2020-10-27 01:45:49,752 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 114 transitions. Word has length 28 [2020-10-27 01:45:49,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:45:49,753 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 114 transitions. [2020-10-27 01:45:49,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:45:49,753 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 114 transitions. [2020-10-27 01:45:49,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 01:45:49,753 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:45:49,753 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 01:45:49,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 01:45:49,754 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:45:49,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:45:49,754 INFO L82 PathProgramCache]: Analyzing trace with hash 870656676, now seen corresponding path program 18 times [2020-10-27 01:45:49,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:45:49,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [632693430] [2020-10-27 01:45:49,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:45:49,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:49,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:49,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:50,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:50,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 01:45:50,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:45:50,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 433 [2020-10-27 01:45:50,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:50,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:45:50,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:45:50,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 01:45:50,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:50,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:45:50,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:50,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:50,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:50,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:45:50,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:50,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:45:50,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:50,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:45:50,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:45:50,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:45:50,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:50,399 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-27 01:45:50,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [632693430] [2020-10-27 01:45:50,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:45:50,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:45:50,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932465470] [2020-10-27 01:45:50,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:45:50,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:45:50,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:45:50,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:45:50,401 INFO L87 Difference]: Start difference. First operand 82 states and 114 transitions. Second operand 12 states. [2020-10-27 01:45:51,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:45:51,124 INFO L93 Difference]: Finished difference Result 104 states and 136 transitions. [2020-10-27 01:45:51,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:45:51,124 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-10-27 01:45:51,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:45:51,125 INFO L225 Difference]: With dead ends: 104 [2020-10-27 01:45:51,126 INFO L226 Difference]: Without dead ends: 91 [2020-10-27 01:45:51,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:45:51,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-27 01:45:51,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 83. [2020-10-27 01:45:51,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-27 01:45:51,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 115 transitions. [2020-10-27 01:45:51,138 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 115 transitions. Word has length 28 [2020-10-27 01:45:51,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:45:51,138 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 115 transitions. [2020-10-27 01:45:51,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:45:51,139 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 115 transitions. [2020-10-27 01:45:51,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 01:45:51,139 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:45:51,139 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:45:51,139 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 01:45:51,139 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:45:51,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:45:51,140 INFO L82 PathProgramCache]: Analyzing trace with hash 2120287539, now seen corresponding path program 15 times [2020-10-27 01:45:51,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:45:51,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [513478710] [2020-10-27 01:45:51,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:45:51,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:51,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:51,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:51,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:52,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:52,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 01:45:52,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:45:52,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1008 [2020-10-27 01:45:52,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:52,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:45:52,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:45:52,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:45:52,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:52,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:45:52,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:52,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:52,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:52,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:45:52,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:52,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:45:52,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:52,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:45:52,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:45:52,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:45:52,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:52,586 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:45:52,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [513478710] [2020-10-27 01:45:52,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:45:52,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:45:52,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279475164] [2020-10-27 01:45:52,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:45:52,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:45:52,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:45:52,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:45:52,589 INFO L87 Difference]: Start difference. First operand 83 states and 115 transitions. Second operand 17 states. [2020-10-27 01:45:54,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:45:54,050 INFO L93 Difference]: Finished difference Result 128 states and 190 transitions. [2020-10-27 01:45:54,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:45:54,050 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 28 [2020-10-27 01:45:54,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:45:54,051 INFO L225 Difference]: With dead ends: 128 [2020-10-27 01:45:54,051 INFO L226 Difference]: Without dead ends: 121 [2020-10-27 01:45:54,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:45:54,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-27 01:45:54,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 87. [2020-10-27 01:45:54,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-27 01:45:54,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 121 transitions. [2020-10-27 01:45:54,067 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 121 transitions. Word has length 28 [2020-10-27 01:45:54,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:45:54,067 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 121 transitions. [2020-10-27 01:45:54,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:45:54,068 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 121 transitions. [2020-10-27 01:45:54,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 01:45:54,068 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:45:54,068 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:45:54,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 01:45:54,069 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:45:54,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:45:54,069 INFO L82 PathProgramCache]: Analyzing trace with hash -242609131, now seen corresponding path program 19 times [2020-10-27 01:45:54,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:45:54,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1665794987] [2020-10-27 01:45:54,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:45:54,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:54,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:54,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:55,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:55,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 01:45:55,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:45:55,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1275 [2020-10-27 01:45:55,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:55,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:45:55,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:45:55,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 01:45:55,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:55,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:45:55,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:55,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:55,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:55,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:45:55,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:55,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:45:55,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:55,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:45:55,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:45:55,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:45:55,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:55,601 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-27 01:45:55,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1665794987] [2020-10-27 01:45:55,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:45:55,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:45:55,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545793695] [2020-10-27 01:45:55,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:45:55,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:45:55,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:45:55,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:45:55,603 INFO L87 Difference]: Start difference. First operand 87 states and 121 transitions. Second operand 14 states. [2020-10-27 01:45:56,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:45:56,405 INFO L93 Difference]: Finished difference Result 107 states and 141 transitions. [2020-10-27 01:45:56,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:45:56,406 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 29 [2020-10-27 01:45:56,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:45:56,407 INFO L225 Difference]: With dead ends: 107 [2020-10-27 01:45:56,407 INFO L226 Difference]: Without dead ends: 95 [2020-10-27 01:45:56,408 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:45:56,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-27 01:45:56,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 88. [2020-10-27 01:45:56,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-27 01:45:56,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 122 transitions. [2020-10-27 01:45:56,423 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 122 transitions. Word has length 29 [2020-10-27 01:45:56,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:45:56,423 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 122 transitions. [2020-10-27 01:45:56,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:45:56,423 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 122 transitions. [2020-10-27 01:45:56,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 01:45:56,424 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:45:56,424 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:45:56,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 01:45:56,424 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:45:56,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:45:56,425 INFO L82 PathProgramCache]: Analyzing trace with hash 798044231, now seen corresponding path program 20 times [2020-10-27 01:45:56,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:45:56,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [137110687] [2020-10-27 01:45:56,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:45:56,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:56,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:56,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:56,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:56,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 01:45:56,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:45:56,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 560 [2020-10-27 01:45:57,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:57,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:45:57,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:45:57,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 01:45:57,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:57,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:45:57,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:57,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:57,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:57,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:45:57,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:57,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:45:57,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:57,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:45:57,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:45:57,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:45:57,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:57,242 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-27 01:45:57,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [137110687] [2020-10-27 01:45:57,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:45:57,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:45:57,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588481227] [2020-10-27 01:45:57,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:45:57,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:45:57,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:45:57,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:45:57,249 INFO L87 Difference]: Start difference. First operand 88 states and 122 transitions. Second operand 13 states. [2020-10-27 01:45:58,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:45:58,177 INFO L93 Difference]: Finished difference Result 110 states and 144 transitions. [2020-10-27 01:45:58,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:45:58,177 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2020-10-27 01:45:58,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:45:58,178 INFO L225 Difference]: With dead ends: 110 [2020-10-27 01:45:58,178 INFO L226 Difference]: Without dead ends: 97 [2020-10-27 01:45:58,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:45:58,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-27 01:45:58,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 89. [2020-10-27 01:45:58,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-27 01:45:58,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 123 transitions. [2020-10-27 01:45:58,194 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 123 transitions. Word has length 29 [2020-10-27 01:45:58,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:45:58,194 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 123 transitions. [2020-10-27 01:45:58,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:45:58,194 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 123 transitions. [2020-10-27 01:45:58,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 01:45:58,195 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:45:58,195 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:45:58,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 01:45:58,195 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:45:58,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:45:58,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1455499435, now seen corresponding path program 16 times [2020-10-27 01:45:58,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:45:58,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1401507168] [2020-10-27 01:45:58,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:45:58,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:58,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:58,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:58,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:59,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:59,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 01:45:59,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:45:59,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1145 [2020-10-27 01:45:59,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:59,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 01:45:59,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:45:59,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 01:45:59,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:59,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:45:59,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:59,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:59,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:59,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:45:59,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:59,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:45:59,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:59,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:45:59,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:45:59,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:45:59,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:59,687 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:45:59,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1401507168] [2020-10-27 01:45:59,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:45:59,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 01:45:59,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73802955] [2020-10-27 01:45:59,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 01:45:59,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:45:59,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 01:45:59,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:45:59,688 INFO L87 Difference]: Start difference. First operand 89 states and 123 transitions. Second operand 18 states. [2020-10-27 01:46:01,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:01,374 INFO L93 Difference]: Finished difference Result 135 states and 200 transitions. [2020-10-27 01:46:01,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:46:01,375 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 29 [2020-10-27 01:46:01,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:01,376 INFO L225 Difference]: With dead ends: 135 [2020-10-27 01:46:01,376 INFO L226 Difference]: Without dead ends: 128 [2020-10-27 01:46:01,377 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=99, Invalid=957, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 01:46:01,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-27 01:46:01,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 93. [2020-10-27 01:46:01,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-27 01:46:01,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 129 transitions. [2020-10-27 01:46:01,393 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 129 transitions. Word has length 29 [2020-10-27 01:46:01,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:01,394 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 129 transitions. [2020-10-27 01:46:01,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 01:46:01,394 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 129 transitions. [2020-10-27 01:46:01,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:46:01,394 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:01,394 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:46:01,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 01:46:01,395 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:01,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:01,395 INFO L82 PathProgramCache]: Analyzing trace with hash -126493324, now seen corresponding path program 21 times [2020-10-27 01:46:01,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:01,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1623931314] [2020-10-27 01:46:01,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:01,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:01,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:01,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:01,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:46:01,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:01,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 400 [2020-10-27 01:46:01,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:01,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:46:01,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 01:46:01,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 01:46:01,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:01,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:01,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:01,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:01,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:01,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:01,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:01,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:46:01,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:01,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:01,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:01,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:01,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:02,001 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-27 01:46:02,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1623931314] [2020-10-27 01:46:02,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:02,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:46:02,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870093931] [2020-10-27 01:46:02,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:46:02,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:02,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:46:02,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:46:02,002 INFO L87 Difference]: Start difference. First operand 93 states and 129 transitions. Second operand 11 states. [2020-10-27 01:46:02,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:02,732 INFO L93 Difference]: Finished difference Result 228 states and 316 transitions. [2020-10-27 01:46:02,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:46:02,733 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-27 01:46:02,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:02,735 INFO L225 Difference]: With dead ends: 228 [2020-10-27 01:46:02,735 INFO L226 Difference]: Without dead ends: 216 [2020-10-27 01:46:02,735 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:46:02,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-27 01:46:02,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 98. [2020-10-27 01:46:02,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-27 01:46:02,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 137 transitions. [2020-10-27 01:46:02,754 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 137 transitions. Word has length 30 [2020-10-27 01:46:02,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:02,754 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 137 transitions. [2020-10-27 01:46:02,754 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:46:02,754 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 137 transitions. [2020-10-27 01:46:02,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:46:02,755 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:02,755 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:46:02,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 01:46:02,755 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:02,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:02,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1452941564, now seen corresponding path program 22 times [2020-10-27 01:46:02,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:02,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1865081953] [2020-10-27 01:46:02,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:02,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:02,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:02,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:03,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:03,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:46:03,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:46:03,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1184 [2020-10-27 01:46:03,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:03,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:46:03,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:46:03,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 01:46:03,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:04,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:04,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:04,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:04,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:04,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:04,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:04,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:46:04,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:04,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:04,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:04,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:04,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:04,253 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-27 01:46:04,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1865081953] [2020-10-27 01:46:04,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:04,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:46:04,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786083290] [2020-10-27 01:46:04,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:46:04,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:04,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:46:04,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:46:04,256 INFO L87 Difference]: Start difference. First operand 98 states and 137 transitions. Second operand 14 states. [2020-10-27 01:46:05,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:05,296 INFO L93 Difference]: Finished difference Result 120 states and 159 transitions. [2020-10-27 01:46:05,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:46:05,297 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 30 [2020-10-27 01:46:05,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:05,298 INFO L225 Difference]: With dead ends: 120 [2020-10-27 01:46:05,298 INFO L226 Difference]: Without dead ends: 107 [2020-10-27 01:46:05,299 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2020-10-27 01:46:05,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-27 01:46:05,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 99. [2020-10-27 01:46:05,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-27 01:46:05,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 138 transitions. [2020-10-27 01:46:05,317 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 138 transitions. Word has length 30 [2020-10-27 01:46:05,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:05,317 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 138 transitions. [2020-10-27 01:46:05,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:46:05,317 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 138 transitions. [2020-10-27 01:46:05,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:46:05,317 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:05,318 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 01:46:05,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-27 01:46:05,318 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:05,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:05,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1185324108, now seen corresponding path program 23 times [2020-10-27 01:46:05,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:05,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1741313202] [2020-10-27 01:46:05,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:05,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:05,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:05,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:05,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:05,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:46:05,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:46:05,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 350 [2020-10-27 01:46:05,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:05,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:46:05,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:46:05,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 01:46:05,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:05,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:05,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:05,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:05,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:05,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:05,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:05,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:46:05,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:05,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:05,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:05,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:05,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:05,911 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-27 01:46:05,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1741313202] [2020-10-27 01:46:05,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:05,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:46:05,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859195641] [2020-10-27 01:46:05,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:46:05,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:05,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:46:05,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:46:05,913 INFO L87 Difference]: Start difference. First operand 99 states and 138 transitions. Second operand 13 states. [2020-10-27 01:46:06,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:06,794 INFO L93 Difference]: Finished difference Result 123 states and 162 transitions. [2020-10-27 01:46:06,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:46:06,795 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2020-10-27 01:46:06,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:06,796 INFO L225 Difference]: With dead ends: 123 [2020-10-27 01:46:06,796 INFO L226 Difference]: Without dead ends: 109 [2020-10-27 01:46:06,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:46:06,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-27 01:46:06,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 100. [2020-10-27 01:46:06,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-27 01:46:06,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 139 transitions. [2020-10-27 01:46:06,815 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 139 transitions. Word has length 30 [2020-10-27 01:46:06,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:06,815 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 139 transitions. [2020-10-27 01:46:06,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:46:06,816 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 139 transitions. [2020-10-27 01:46:06,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:46:06,816 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:06,816 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:46:06,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-27 01:46:06,817 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:06,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:06,817 INFO L82 PathProgramCache]: Analyzing trace with hash -635745933, now seen corresponding path program 17 times [2020-10-27 01:46:06,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:06,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [380783535] [2020-10-27 01:46:06,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:06,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:06,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:06,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:07,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:07,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:07,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:46:07,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:46:07,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1009 [2020-10-27 01:46:07,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:07,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 01:46:07,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:46:07,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:46:07,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:08,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:08,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:08,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:08,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:08,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:08,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:08,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:46:08,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:08,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:08,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:08,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:08,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:08,313 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:46:08,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [380783535] [2020-10-27 01:46:08,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:08,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 01:46:08,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885020170] [2020-10-27 01:46:08,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 01:46:08,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:08,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 01:46:08,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:46:08,315 INFO L87 Difference]: Start difference. First operand 100 states and 139 transitions. Second operand 19 states. [2020-10-27 01:46:10,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:10,203 INFO L93 Difference]: Finished difference Result 139 states and 202 transitions. [2020-10-27 01:46:10,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:46:10,204 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 30 [2020-10-27 01:46:10,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:10,205 INFO L225 Difference]: With dead ends: 139 [2020-10-27 01:46:10,205 INFO L226 Difference]: Without dead ends: 131 [2020-10-27 01:46:10,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=101, Invalid=1089, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:46:10,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-27 01:46:10,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 91. [2020-10-27 01:46:10,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-27 01:46:10,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 124 transitions. [2020-10-27 01:46:10,226 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 124 transitions. Word has length 30 [2020-10-27 01:46:10,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:10,226 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 124 transitions. [2020-10-27 01:46:10,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 01:46:10,226 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 124 transitions. [2020-10-27 01:46:10,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:46:10,227 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:10,227 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:46:10,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-27 01:46:10,227 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:10,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:10,228 INFO L82 PathProgramCache]: Analyzing trace with hash -821870603, now seen corresponding path program 24 times [2020-10-27 01:46:10,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:10,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1352364251] [2020-10-27 01:46:10,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:10,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:10,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:10,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:12,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:12,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:46:12,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:46:12,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2055 [2020-10-27 01:46:12,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:12,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:46:12,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:46:12,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:46:12,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:12,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:12,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:12,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:12,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:12,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:12,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:12,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:46:12,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:12,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:12,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:12,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:12,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:12,559 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-27 01:46:12,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1352364251] [2020-10-27 01:46:12,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:12,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:46:12,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111157956] [2020-10-27 01:46:12,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:46:12,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:12,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:46:12,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:46:12,561 INFO L87 Difference]: Start difference. First operand 91 states and 124 transitions. Second operand 15 states. [2020-10-27 01:46:13,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:13,381 INFO L93 Difference]: Finished difference Result 103 states and 135 transitions. [2020-10-27 01:46:13,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:46:13,382 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 31 [2020-10-27 01:46:13,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:13,383 INFO L225 Difference]: With dead ends: 103 [2020-10-27 01:46:13,383 INFO L226 Difference]: Without dead ends: 83 [2020-10-27 01:46:13,384 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:46:13,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-27 01:46:13,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-10-27 01:46:13,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-27 01:46:13,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 114 transitions. [2020-10-27 01:46:13,399 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 114 transitions. Word has length 31 [2020-10-27 01:46:13,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:13,399 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 114 transitions. [2020-10-27 01:46:13,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:46:13,399 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 114 transitions. [2020-10-27 01:46:13,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:46:13,400 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:13,400 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:46:13,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-27 01:46:13,400 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:13,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:13,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1780942823, now seen corresponding path program 25 times [2020-10-27 01:46:13,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:13,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1728849448] [2020-10-27 01:46:13,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:13,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:13,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:13,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:14,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:14,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:46:14,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:46:14,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1377 [2020-10-27 01:46:14,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:14,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:46:14,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:46:14,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:46:14,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:15,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:15,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:15,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:15,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:15,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:15,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:15,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:46:15,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:15,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:15,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:15,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:15,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:15,068 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-27 01:46:15,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1728849448] [2020-10-27 01:46:15,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:15,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:46:15,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730408051] [2020-10-27 01:46:15,069 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:46:15,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:15,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:46:15,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:46:15,069 INFO L87 Difference]: Start difference. First operand 83 states and 114 transitions. Second operand 15 states. [2020-10-27 01:46:15,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:15,977 INFO L93 Difference]: Finished difference Result 105 states and 136 transitions. [2020-10-27 01:46:15,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:46:15,977 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 31 [2020-10-27 01:46:15,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:15,978 INFO L225 Difference]: With dead ends: 105 [2020-10-27 01:46:15,979 INFO L226 Difference]: Without dead ends: 92 [2020-10-27 01:46:15,979 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:46:15,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-27 01:46:15,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 84. [2020-10-27 01:46:15,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-27 01:46:15,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 115 transitions. [2020-10-27 01:46:15,994 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 115 transitions. Word has length 31 [2020-10-27 01:46:15,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:15,994 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 115 transitions. [2020-10-27 01:46:15,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:46:15,994 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 115 transitions. [2020-10-27 01:46:15,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:46:15,995 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:15,995 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:46:15,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-27 01:46:15,995 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:15,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:15,996 INFO L82 PathProgramCache]: Analyzing trace with hash -318541323, now seen corresponding path program 26 times [2020-10-27 01:46:15,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:15,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [276016976] [2020-10-27 01:46:15,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:16,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:16,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:16,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:16,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:16,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:46:16,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:46:16,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 744 [2020-10-27 01:46:16,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:16,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:46:16,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:46:16,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 01:46:16,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:16,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:16,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:16,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:17,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:17,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:17,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:17,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:46:17,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:17,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:17,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:17,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:17,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:17,005 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-27 01:46:17,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [276016976] [2020-10-27 01:46:17,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:17,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:46:17,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996555475] [2020-10-27 01:46:17,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:46:17,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:17,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:46:17,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:46:17,006 INFO L87 Difference]: Start difference. First operand 84 states and 115 transitions. Second operand 14 states. [2020-10-27 01:46:17,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:17,990 INFO L93 Difference]: Finished difference Result 108 states and 139 transitions. [2020-10-27 01:46:17,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:46:17,991 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 31 [2020-10-27 01:46:17,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:17,992 INFO L225 Difference]: With dead ends: 108 [2020-10-27 01:46:17,992 INFO L226 Difference]: Without dead ends: 94 [2020-10-27 01:46:17,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:46:17,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-27 01:46:18,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 85. [2020-10-27 01:46:18,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-27 01:46:18,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 116 transitions. [2020-10-27 01:46:18,008 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 116 transitions. Word has length 31 [2020-10-27 01:46:18,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:18,008 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 116 transitions. [2020-10-27 01:46:18,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:46:18,008 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 116 transitions. [2020-10-27 01:46:18,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:46:18,009 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:18,009 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:46:18,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-27 01:46:18,009 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:18,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:18,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1754766823, now seen corresponding path program 18 times [2020-10-27 01:46:18,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:18,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1219361820] [2020-10-27 01:46:18,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:18,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:18,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:18,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:18,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:18,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:46:18,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:46:18,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 280 [2020-10-27 01:46:18,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:18,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:46:18,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:46:18,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 01:46:18,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:18,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:18,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:18,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:18,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:18,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:18,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:18,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:46:18,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:18,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:18,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:18,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:18,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:18,527 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-27 01:46:18,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1219361820] [2020-10-27 01:46:18,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:18,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:46:18,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531595039] [2020-10-27 01:46:18,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:46:18,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:18,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:46:18,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:46:18,529 INFO L87 Difference]: Start difference. First operand 85 states and 116 transitions. Second operand 13 states. [2020-10-27 01:46:19,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:19,348 INFO L93 Difference]: Finished difference Result 111 states and 142 transitions. [2020-10-27 01:46:19,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:46:19,351 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2020-10-27 01:46:19,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:19,352 INFO L225 Difference]: With dead ends: 111 [2020-10-27 01:46:19,352 INFO L226 Difference]: Without dead ends: 96 [2020-10-27 01:46:19,352 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:46:19,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-27 01:46:19,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 86. [2020-10-27 01:46:19,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-27 01:46:19,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 117 transitions. [2020-10-27 01:46:19,368 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 117 transitions. Word has length 31 [2020-10-27 01:46:19,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:19,368 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 117 transitions. [2020-10-27 01:46:19,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:46:19,368 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 117 transitions. [2020-10-27 01:46:19,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:46:19,369 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:19,369 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:46:19,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-27 01:46:19,369 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:19,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:19,369 INFO L82 PathProgramCache]: Analyzing trace with hash -993191147, now seen corresponding path program 19 times [2020-10-27 01:46:19,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:19,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1437279923] [2020-10-27 01:46:19,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:19,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:19,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:19,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:19,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:21,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:21,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:46:21,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:46:21,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1668 [2020-10-27 01:46:21,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:21,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 01:46:21,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:46:21,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 01:46:21,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:21,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:21,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:21,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:21,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:21,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:21,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:21,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:46:21,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:21,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:21,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:21,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:21,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:21,496 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:46:21,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1437279923] [2020-10-27 01:46:21,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:21,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 01:46:21,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302367207] [2020-10-27 01:46:21,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 01:46:21,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:21,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 01:46:21,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:46:21,497 INFO L87 Difference]: Start difference. First operand 86 states and 117 transitions. Second operand 20 states. [2020-10-27 01:46:23,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:23,625 INFO L93 Difference]: Finished difference Result 140 states and 210 transitions. [2020-10-27 01:46:23,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 01:46:23,626 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 31 [2020-10-27 01:46:23,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:23,628 INFO L225 Difference]: With dead ends: 140 [2020-10-27 01:46:23,628 INFO L226 Difference]: Without dead ends: 132 [2020-10-27 01:46:23,629 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=107, Invalid=1225, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 01:46:23,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-27 01:46:23,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 91. [2020-10-27 01:46:23,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-27 01:46:23,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 124 transitions. [2020-10-27 01:46:23,650 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 124 transitions. Word has length 31 [2020-10-27 01:46:23,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:23,650 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 124 transitions. [2020-10-27 01:46:23,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 01:46:23,650 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 124 transitions. [2020-10-27 01:46:23,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:46:23,651 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:23,651 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:46:23,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-27 01:46:23,651 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:23,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:23,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1047856284, now seen corresponding path program 27 times [2020-10-27 01:46:23,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:23,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2007151729] [2020-10-27 01:46:23,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:23,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:23,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:23,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:25,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:25,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:46:25,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:46:25,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1859 [2020-10-27 01:46:25,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:25,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:46:25,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:46:25,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 01:46:25,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:25,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:25,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:25,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:25,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:25,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:25,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:25,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:46:25,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:25,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:25,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:25,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:25,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:25,845 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-27 01:46:25,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2007151729] [2020-10-27 01:46:25,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:25,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:46:25,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320261831] [2020-10-27 01:46:25,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:46:25,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:25,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:46:25,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:46:25,847 INFO L87 Difference]: Start difference. First operand 91 states and 124 transitions. Second operand 16 states. [2020-10-27 01:46:26,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:26,886 INFO L93 Difference]: Finished difference Result 113 states and 146 transitions. [2020-10-27 01:46:26,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:46:26,887 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 32 [2020-10-27 01:46:26,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:26,888 INFO L225 Difference]: With dead ends: 113 [2020-10-27 01:46:26,888 INFO L226 Difference]: Without dead ends: 100 [2020-10-27 01:46:26,889 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:46:26,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-27 01:46:26,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 92. [2020-10-27 01:46:26,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-27 01:46:26,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 125 transitions. [2020-10-27 01:46:26,906 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 125 transitions. Word has length 32 [2020-10-27 01:46:26,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:26,906 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 125 transitions. [2020-10-27 01:46:26,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:46:26,906 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 125 transitions. [2020-10-27 01:46:26,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:46:26,907 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:26,907 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:46:26,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-27 01:46:26,907 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:26,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:26,908 INFO L82 PathProgramCache]: Analyzing trace with hash 781921236, now seen corresponding path program 28 times [2020-10-27 01:46:26,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:26,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1806287125] [2020-10-27 01:46:26,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:26,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:26,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:26,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:28,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:28,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:46:28,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:46:28,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1118 [2020-10-27 01:46:28,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:28,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:46:28,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:46:28,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:46:28,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:28,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:28,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:28,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:28,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:28,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:28,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:28,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:46:28,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:28,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:28,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:28,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:28,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:28,318 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-27 01:46:28,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1806287125] [2020-10-27 01:46:28,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:28,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:46:28,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518222725] [2020-10-27 01:46:28,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:46:28,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:28,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:46:28,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:46:28,319 INFO L87 Difference]: Start difference. First operand 92 states and 125 transitions. Second operand 15 states. [2020-10-27 01:46:29,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:29,418 INFO L93 Difference]: Finished difference Result 116 states and 149 transitions. [2020-10-27 01:46:29,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:46:29,419 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 32 [2020-10-27 01:46:29,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:29,420 INFO L225 Difference]: With dead ends: 116 [2020-10-27 01:46:29,420 INFO L226 Difference]: Without dead ends: 102 [2020-10-27 01:46:29,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2020-10-27 01:46:29,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-27 01:46:29,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 93. [2020-10-27 01:46:29,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-27 01:46:29,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 126 transitions. [2020-10-27 01:46:29,434 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 126 transitions. Word has length 32 [2020-10-27 01:46:29,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:29,434 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 126 transitions. [2020-10-27 01:46:29,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:46:29,434 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 126 transitions. [2020-10-27 01:46:29,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:46:29,435 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:29,435 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 01:46:29,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-27 01:46:29,435 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:29,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:29,435 INFO L82 PathProgramCache]: Analyzing trace with hash 488127780, now seen corresponding path program 29 times [2020-10-27 01:46:29,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:29,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1347499797] [2020-10-27 01:46:29,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:29,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:29,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:29,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:29,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:29,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:46:29,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:46:29,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 430 [2020-10-27 01:46:29,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:29,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:46:29,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:46:29,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 01:46:29,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:30,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:30,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:30,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:30,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:30,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:30,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:30,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:46:30,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:30,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:30,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:30,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:30,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:30,134 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-27 01:46:30,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1347499797] [2020-10-27 01:46:30,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:30,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:46:30,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709697893] [2020-10-27 01:46:30,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:46:30,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:30,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:46:30,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:46:30,135 INFO L87 Difference]: Start difference. First operand 93 states and 126 transitions. Second operand 14 states. [2020-10-27 01:46:31,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:31,115 INFO L93 Difference]: Finished difference Result 119 states and 152 transitions. [2020-10-27 01:46:31,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:46:31,116 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 32 [2020-10-27 01:46:31,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:31,117 INFO L225 Difference]: With dead ends: 119 [2020-10-27 01:46:31,117 INFO L226 Difference]: Without dead ends: 104 [2020-10-27 01:46:31,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2020-10-27 01:46:31,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-27 01:46:31,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 94. [2020-10-27 01:46:31,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-27 01:46:31,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 127 transitions. [2020-10-27 01:46:31,133 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 127 transitions. Word has length 32 [2020-10-27 01:46:31,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:31,134 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 127 transitions. [2020-10-27 01:46:31,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:46:31,134 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 127 transitions. [2020-10-27 01:46:31,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:46:31,135 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:31,135 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:46:31,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-27 01:46:31,135 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:31,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:31,135 INFO L82 PathProgramCache]: Analyzing trace with hash 810909107, now seen corresponding path program 20 times [2020-10-27 01:46:31,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:31,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1149815723] [2020-10-27 01:46:31,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:31,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:31,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:31,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:31,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:32,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:32,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:46:32,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:46:32,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1614 [2020-10-27 01:46:32,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:32,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 01:46:32,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:46:32,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 01:46:32,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:33,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:33,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:33,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:33,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:33,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:33,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:33,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:46:33,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:33,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:33,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:33,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:33,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:33,248 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:46:33,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1149815723] [2020-10-27 01:46:33,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:33,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 01:46:33,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505980649] [2020-10-27 01:46:33,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 01:46:33,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:33,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 01:46:33,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:46:33,250 INFO L87 Difference]: Start difference. First operand 94 states and 127 transitions. Second operand 21 states. [2020-10-27 01:46:35,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:35,607 INFO L93 Difference]: Finished difference Result 149 states and 222 transitions. [2020-10-27 01:46:35,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 01:46:35,607 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 32 [2020-10-27 01:46:35,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:35,609 INFO L225 Difference]: With dead ends: 149 [2020-10-27 01:46:35,609 INFO L226 Difference]: Without dead ends: 141 [2020-10-27 01:46:35,609 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=113, Invalid=1369, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 01:46:35,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-27 01:46:35,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 99. [2020-10-27 01:46:35,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-27 01:46:35,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 134 transitions. [2020-10-27 01:46:35,622 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 134 transitions. Word has length 32 [2020-10-27 01:46:35,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:35,623 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 134 transitions. [2020-10-27 01:46:35,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 01:46:35,623 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 134 transitions. [2020-10-27 01:46:35,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:46:35,623 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:35,623 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:46:35,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-27 01:46:35,624 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:35,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:35,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1453684615, now seen corresponding path program 30 times [2020-10-27 01:46:35,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:35,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [68378807] [2020-10-27 01:46:35,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:35,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:35,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:35,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:35,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:46:35,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:35,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 335 [2020-10-27 01:46:35,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:35,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 01:46:35,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 01:46:35,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 01:46:35,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:36,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:36,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:36,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:36,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:36,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:36,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:36,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:46:36,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:36,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:36,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:36,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:36,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:36,180 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-27 01:46:36,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [68378807] [2020-10-27 01:46:36,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:36,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:46:36,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351567692] [2020-10-27 01:46:36,181 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:46:36,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:36,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:46:36,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:46:36,182 INFO L87 Difference]: Start difference. First operand 99 states and 134 transitions. Second operand 12 states. [2020-10-27 01:46:36,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:36,989 INFO L93 Difference]: Finished difference Result 278 states and 382 transitions. [2020-10-27 01:46:36,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:46:36,989 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2020-10-27 01:46:36,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:36,991 INFO L225 Difference]: With dead ends: 278 [2020-10-27 01:46:36,992 INFO L226 Difference]: Without dead ends: 265 [2020-10-27 01:46:36,992 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:46:36,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-10-27 01:46:37,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 102. [2020-10-27 01:46:37,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-27 01:46:37,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 139 transitions. [2020-10-27 01:46:37,013 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 139 transitions. Word has length 33 [2020-10-27 01:46:37,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:37,013 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 139 transitions. [2020-10-27 01:46:37,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:46:37,013 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 139 transitions. [2020-10-27 01:46:37,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:46:37,014 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:37,014 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:46:37,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-27 01:46:37,014 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:37,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:37,015 INFO L82 PathProgramCache]: Analyzing trace with hash 536522197, now seen corresponding path program 31 times [2020-10-27 01:46:37,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:37,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1389751842] [2020-10-27 01:46:37,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:37,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:37,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:37,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:39,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:39,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:46:39,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:46:39,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2062 [2020-10-27 01:46:39,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:39,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:46:39,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:46:39,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 01:46:39,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:39,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:39,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:39,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:39,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:39,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:39,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:39,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:46:39,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:39,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:39,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:39,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:39,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:39,376 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-27 01:46:39,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1389751842] [2020-10-27 01:46:39,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:39,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:46:39,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229807384] [2020-10-27 01:46:39,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:46:39,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:39,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:46:39,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:46:39,378 INFO L87 Difference]: Start difference. First operand 102 states and 139 transitions. Second operand 16 states. [2020-10-27 01:46:40,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:40,737 INFO L93 Difference]: Finished difference Result 126 states and 163 transitions. [2020-10-27 01:46:40,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 01:46:40,738 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 33 [2020-10-27 01:46:40,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:40,739 INFO L225 Difference]: With dead ends: 126 [2020-10-27 01:46:40,739 INFO L226 Difference]: Without dead ends: 112 [2020-10-27 01:46:40,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 01:46:40,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-27 01:46:40,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 103. [2020-10-27 01:46:40,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-27 01:46:40,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 140 transitions. [2020-10-27 01:46:40,754 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 140 transitions. Word has length 33 [2020-10-27 01:46:40,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:40,754 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 140 transitions. [2020-10-27 01:46:40,754 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:46:40,754 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 140 transitions. [2020-10-27 01:46:40,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:46:40,755 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:40,755 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:46:40,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-27 01:46:40,755 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:40,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:40,755 INFO L82 PathProgramCache]: Analyzing trace with hash -122976889, now seen corresponding path program 32 times [2020-10-27 01:46:40,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:40,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1380125102] [2020-10-27 01:46:40,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:40,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:40,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:40,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:41,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:41,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:46:41,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:46:41,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 684 [2020-10-27 01:46:41,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:41,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:46:41,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:46:41,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:46:41,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:41,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:41,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:41,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:41,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:41,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:41,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:41,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:46:41,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:41,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:41,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:41,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:41,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:41,730 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-27 01:46:41,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1380125102] [2020-10-27 01:46:41,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:41,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:46:41,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596596168] [2020-10-27 01:46:41,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:46:41,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:41,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:46:41,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:46:41,732 INFO L87 Difference]: Start difference. First operand 103 states and 140 transitions. Second operand 15 states. [2020-10-27 01:46:42,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:42,956 INFO L93 Difference]: Finished difference Result 129 states and 166 transitions. [2020-10-27 01:46:42,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:46:42,957 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 33 [2020-10-27 01:46:42,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:42,958 INFO L225 Difference]: With dead ends: 129 [2020-10-27 01:46:42,958 INFO L226 Difference]: Without dead ends: 114 [2020-10-27 01:46:42,958 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=107, Invalid=763, Unknown=0, NotChecked=0, Total=870 [2020-10-27 01:46:42,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-27 01:46:42,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 104. [2020-10-27 01:46:42,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-27 01:46:42,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 141 transitions. [2020-10-27 01:46:42,980 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 141 transitions. Word has length 33 [2020-10-27 01:46:42,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:42,980 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 141 transitions. [2020-10-27 01:46:42,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:46:42,980 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 141 transitions. [2020-10-27 01:46:42,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:46:42,980 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:42,981 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:46:42,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-27 01:46:42,981 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:42,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:42,981 INFO L82 PathProgramCache]: Analyzing trace with hash -274933803, now seen corresponding path program 21 times [2020-10-27 01:46:42,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:42,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1029256616] [2020-10-27 01:46:42,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:42,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:43,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:43,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:43,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:43,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:46:43,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:46:43,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 323 [2020-10-27 01:46:43,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:43,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:46:43,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:46:43,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 01:46:43,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:43,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:43,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:43,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:43,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:43,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:43,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:43,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:46:43,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:43,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:43,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:43,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:43,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:43,572 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-27 01:46:43,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1029256616] [2020-10-27 01:46:43,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:43,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:46:43,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554997315] [2020-10-27 01:46:43,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:46:43,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:43,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:46:43,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:46:43,574 INFO L87 Difference]: Start difference. First operand 104 states and 141 transitions. Second operand 14 states. [2020-10-27 01:46:44,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:44,522 INFO L93 Difference]: Finished difference Result 132 states and 169 transitions. [2020-10-27 01:46:44,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:46:44,522 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 33 [2020-10-27 01:46:44,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:44,523 INFO L225 Difference]: With dead ends: 132 [2020-10-27 01:46:44,523 INFO L226 Difference]: Without dead ends: 116 [2020-10-27 01:46:44,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:46:44,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-27 01:46:44,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 105. [2020-10-27 01:46:44,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-27 01:46:44,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 142 transitions. [2020-10-27 01:46:44,539 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 142 transitions. Word has length 33 [2020-10-27 01:46:44,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:44,539 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 142 transitions. [2020-10-27 01:46:44,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:46:44,540 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 142 transitions. [2020-10-27 01:46:44,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:46:44,540 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:44,540 INFO L422 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:46:44,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-27 01:46:44,540 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:44,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:44,541 INFO L82 PathProgramCache]: Analyzing trace with hash 903442133, now seen corresponding path program 22 times [2020-10-27 01:46:44,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:44,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [515652729] [2020-10-27 01:46:44,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:44,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:44,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:44,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:45,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:46,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:46,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:46:46,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:46:46,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1640 [2020-10-27 01:46:46,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:46,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 01:46:46,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:46:46,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 01:46:46,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:46,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:46,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:46,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:46,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:46,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:46,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:46,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:46:46,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:46,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:46,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:46,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:46,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:46,717 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:46:46,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [515652729] [2020-10-27 01:46:46,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:46,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 01:46:46,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695060274] [2020-10-27 01:46:46,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 01:46:46,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:46,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 01:46:46,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:46:46,719 INFO L87 Difference]: Start difference. First operand 105 states and 142 transitions. Second operand 22 states. [2020-10-27 01:46:49,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:49,316 INFO L93 Difference]: Finished difference Result 187 states and 288 transitions. [2020-10-27 01:46:49,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 01:46:49,316 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 33 [2020-10-27 01:46:49,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:49,318 INFO L225 Difference]: With dead ends: 187 [2020-10-27 01:46:49,319 INFO L226 Difference]: Without dead ends: 180 [2020-10-27 01:46:49,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=123, Invalid=1517, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 01:46:49,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-27 01:46:49,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 125. [2020-10-27 01:46:49,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-27 01:46:49,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 173 transitions. [2020-10-27 01:46:49,337 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 173 transitions. Word has length 33 [2020-10-27 01:46:49,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:49,338 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 173 transitions. [2020-10-27 01:46:49,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 01:46:49,338 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 173 transitions. [2020-10-27 01:46:49,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 01:46:49,338 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:49,339 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:46:49,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-27 01:46:49,339 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:49,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:49,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1692041156, now seen corresponding path program 33 times [2020-10-27 01:46:49,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:49,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [84196897] [2020-10-27 01:46:49,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:49,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:49,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:49,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:51,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:51,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 01:46:51,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:46:51,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2464 [2020-10-27 01:46:51,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:51,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:46:51,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:46:51,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:46:51,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:52,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:52,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:52,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:52,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:52,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:52,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:52,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:46:52,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:52,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:52,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:52,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:52,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:52,161 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-27 01:46:52,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [84196897] [2020-10-27 01:46:52,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:52,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:46:52,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200860252] [2020-10-27 01:46:52,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:46:52,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:52,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:46:52,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:46:52,162 INFO L87 Difference]: Start difference. First operand 125 states and 173 transitions. Second operand 17 states. [2020-10-27 01:46:53,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:53,209 INFO L93 Difference]: Finished difference Result 138 states and 185 transitions. [2020-10-27 01:46:53,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:46:53,210 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 34 [2020-10-27 01:46:53,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:53,211 INFO L225 Difference]: With dead ends: 138 [2020-10-27 01:46:53,211 INFO L226 Difference]: Without dead ends: 116 [2020-10-27 01:46:53,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:46:53,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-27 01:46:53,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2020-10-27 01:46:53,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-27 01:46:53,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 162 transitions. [2020-10-27 01:46:53,234 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 162 transitions. Word has length 34 [2020-10-27 01:46:53,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:53,234 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 162 transitions. [2020-10-27 01:46:53,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:46:53,234 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 162 transitions. [2020-10-27 01:46:53,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 01:46:53,235 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:53,235 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:46:53,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-27 01:46:53,236 INFO L429 AbstractCegarLoop]: === Iteration 59 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:53,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:53,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1519086580, now seen corresponding path program 34 times [2020-10-27 01:46:53,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:53,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1210768172] [2020-10-27 01:46:53,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:53,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:53,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:53,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:55,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:55,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 01:46:55,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:46:55,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2139 [2020-10-27 01:46:55,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:55,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:46:55,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:46:55,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:46:55,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:55,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:55,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:55,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:55,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:55,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:55,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:55,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:46:55,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:55,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:55,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:55,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:55,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:55,740 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-27 01:46:55,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1210768172] [2020-10-27 01:46:55,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:55,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:46:55,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942624347] [2020-10-27 01:46:55,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:46:55,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:55,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:46:55,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:46:55,741 INFO L87 Difference]: Start difference. First operand 116 states and 162 transitions. Second operand 17 states. [2020-10-27 01:46:56,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:56,902 INFO L93 Difference]: Finished difference Result 140 states and 186 transitions. [2020-10-27 01:46:56,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:46:56,903 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 34 [2020-10-27 01:46:56,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:56,904 INFO L225 Difference]: With dead ends: 140 [2020-10-27 01:46:56,904 INFO L226 Difference]: Without dead ends: 126 [2020-10-27 01:46:56,909 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:46:56,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-27 01:46:56,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 117. [2020-10-27 01:46:56,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-27 01:46:56,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 163 transitions. [2020-10-27 01:46:56,929 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 163 transitions. Word has length 34 [2020-10-27 01:46:56,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:56,930 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 163 transitions. [2020-10-27 01:46:56,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:46:56,930 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 163 transitions. [2020-10-27 01:46:56,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 01:46:56,930 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:56,930 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:46:56,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-27 01:46:56,930 INFO L429 AbstractCegarLoop]: === Iteration 60 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:56,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:56,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1887352444, now seen corresponding path program 35 times [2020-10-27 01:46:56,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:56,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [490014643] [2020-10-27 01:46:56,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:56,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:56,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:57,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:57,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:57,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 01:46:57,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:46:57,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1032 [2020-10-27 01:46:57,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:57,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:46:57,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:46:57,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 01:46:57,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:58,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:58,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:58,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:58,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:58,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:58,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:58,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:46:58,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:58,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:58,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:58,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:58,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:58,284 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-27 01:46:58,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [490014643] [2020-10-27 01:46:58,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:58,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:46:58,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418929043] [2020-10-27 01:46:58,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:46:58,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:58,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:46:58,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:46:58,285 INFO L87 Difference]: Start difference. First operand 117 states and 163 transitions. Second operand 16 states. [2020-10-27 01:46:59,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:59,531 INFO L93 Difference]: Finished difference Result 143 states and 189 transitions. [2020-10-27 01:46:59,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:46:59,532 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 34 [2020-10-27 01:46:59,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:59,533 INFO L225 Difference]: With dead ends: 143 [2020-10-27 01:46:59,533 INFO L226 Difference]: Without dead ends: 128 [2020-10-27 01:46:59,534 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2020-10-27 01:46:59,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-27 01:46:59,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 118. [2020-10-27 01:46:59,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-27 01:46:59,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 164 transitions. [2020-10-27 01:46:59,553 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 164 transitions. Word has length 34 [2020-10-27 01:46:59,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:59,554 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 164 transitions. [2020-10-27 01:46:59,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:46:59,554 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 164 transitions. [2020-10-27 01:46:59,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 01:46:59,554 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:59,554 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 01:46:59,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-27 01:46:59,555 INFO L429 AbstractCegarLoop]: === Iteration 61 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:59,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:59,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1889952308, now seen corresponding path program 36 times [2020-10-27 01:46:59,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:59,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [283008326] [2020-10-27 01:46:59,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:59,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:59,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:59,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:00,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:00,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 01:47:00,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:47:00,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 666 [2020-10-27 01:47:00,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:00,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:47:00,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:47:00,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:47:00,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:00,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:00,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:00,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:00,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:00,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:00,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:00,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:47:00,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:00,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:00,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:00,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:00,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:00,518 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-27 01:47:00,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [283008326] [2020-10-27 01:47:00,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:00,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:47:00,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548837709] [2020-10-27 01:47:00,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:47:00,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:00,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:47:00,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:47:00,520 INFO L87 Difference]: Start difference. First operand 118 states and 164 transitions. Second operand 15 states. [2020-10-27 01:47:01,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:01,643 INFO L93 Difference]: Finished difference Result 146 states and 192 transitions. [2020-10-27 01:47:01,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:47:01,643 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 34 [2020-10-27 01:47:01,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:01,645 INFO L225 Difference]: With dead ends: 146 [2020-10-27 01:47:01,645 INFO L226 Difference]: Without dead ends: 130 [2020-10-27 01:47:01,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2020-10-27 01:47:01,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-27 01:47:01,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 119. [2020-10-27 01:47:01,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-27 01:47:01,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 165 transitions. [2020-10-27 01:47:01,662 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 165 transitions. Word has length 34 [2020-10-27 01:47:01,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:01,662 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 165 transitions. [2020-10-27 01:47:01,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:47:01,662 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 165 transitions. [2020-10-27 01:47:01,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 01:47:01,663 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:01,663 INFO L422 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:01,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-27 01:47:01,663 INFO L429 AbstractCegarLoop]: === Iteration 62 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:01,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:01,663 INFO L82 PathProgramCache]: Analyzing trace with hash -523001357, now seen corresponding path program 23 times [2020-10-27 01:47:01,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:01,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1760687568] [2020-10-27 01:47:01,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:01,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:01,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:01,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:02,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:04,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:04,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 01:47:04,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:47:04,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2852 [2020-10-27 01:47:04,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:04,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 01:47:04,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:47:04,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 01:47:04,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:05,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:05,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:05,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:05,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:05,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:05,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:05,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:47:05,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:05,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:05,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:05,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:05,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:05,175 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:47:05,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1760687568] [2020-10-27 01:47:05,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:05,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 01:47:05,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859411851] [2020-10-27 01:47:05,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 01:47:05,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:05,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 01:47:05,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:47:05,177 INFO L87 Difference]: Start difference. First operand 119 states and 165 transitions. Second operand 23 states. [2020-10-27 01:47:07,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:07,951 INFO L93 Difference]: Finished difference Result 168 states and 247 transitions. [2020-10-27 01:47:07,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 01:47:07,951 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 34 [2020-10-27 01:47:07,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:07,953 INFO L225 Difference]: With dead ends: 168 [2020-10-27 01:47:07,953 INFO L226 Difference]: Without dead ends: 160 [2020-10-27 01:47:07,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=125, Invalid=1681, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 01:47:07,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-27 01:47:07,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 108. [2020-10-27 01:47:07,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-27 01:47:07,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 147 transitions. [2020-10-27 01:47:07,971 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 147 transitions. Word has length 34 [2020-10-27 01:47:07,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:07,971 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 147 transitions. [2020-10-27 01:47:07,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 01:47:07,972 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 147 transitions. [2020-10-27 01:47:07,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 01:47:07,972 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:07,972 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:07,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-27 01:47:07,972 INFO L429 AbstractCegarLoop]: === Iteration 63 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:07,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:07,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1913811381, now seen corresponding path program 37 times [2020-10-27 01:47:07,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:07,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1588297115] [2020-10-27 01:47:07,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:07,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:07,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:08,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:11,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:11,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 01:47:11,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:47:11,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3517 [2020-10-27 01:47:11,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:11,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 01:47:11,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:47:11,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 01:47:11,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:11,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:11,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:11,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:11,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:11,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:11,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:11,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:47:11,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:11,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:11,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:11,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:11,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:11,957 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-27 01:47:11,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1588297115] [2020-10-27 01:47:11,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:11,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 01:47:11,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764237956] [2020-10-27 01:47:11,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 01:47:11,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:11,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 01:47:11,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:47:11,959 INFO L87 Difference]: Start difference. First operand 108 states and 147 transitions. Second operand 18 states. [2020-10-27 01:47:13,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:13,216 INFO L93 Difference]: Finished difference Result 132 states and 171 transitions. [2020-10-27 01:47:13,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:47:13,217 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 35 [2020-10-27 01:47:13,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:13,218 INFO L225 Difference]: With dead ends: 132 [2020-10-27 01:47:13,218 INFO L226 Difference]: Without dead ends: 118 [2020-10-27 01:47:13,218 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 01:47:13,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-27 01:47:13,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 109. [2020-10-27 01:47:13,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-27 01:47:13,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 148 transitions. [2020-10-27 01:47:13,236 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 148 transitions. Word has length 35 [2020-10-27 01:47:13,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:13,237 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 148 transitions. [2020-10-27 01:47:13,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 01:47:13,237 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 148 transitions. [2020-10-27 01:47:13,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 01:47:13,237 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:13,237 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:13,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-27 01:47:13,237 INFO L429 AbstractCegarLoop]: === Iteration 64 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:13,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:13,238 INFO L82 PathProgramCache]: Analyzing trace with hash -748419801, now seen corresponding path program 38 times [2020-10-27 01:47:13,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:13,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [166287066] [2020-10-27 01:47:13,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:13,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:13,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:13,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:15,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:15,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 01:47:15,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:47:15,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1820 [2020-10-27 01:47:15,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:15,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:47:15,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:47:15,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:47:15,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:15,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:15,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:15,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:15,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:15,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:15,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:15,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:47:15,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:15,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:15,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:15,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:15,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:15,419 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-27 01:47:15,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [166287066] [2020-10-27 01:47:15,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:15,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:47:15,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436805546] [2020-10-27 01:47:15,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:47:15,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:15,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:47:15,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:47:15,420 INFO L87 Difference]: Start difference. First operand 109 states and 148 transitions. Second operand 17 states. [2020-10-27 01:47:16,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:16,867 INFO L93 Difference]: Finished difference Result 135 states and 174 transitions. [2020-10-27 01:47:16,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 01:47:16,868 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 35 [2020-10-27 01:47:16,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:16,869 INFO L225 Difference]: With dead ends: 135 [2020-10-27 01:47:16,870 INFO L226 Difference]: Without dead ends: 120 [2020-10-27 01:47:16,870 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=139, Invalid=1051, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:47:16,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-27 01:47:16,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 110. [2020-10-27 01:47:16,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-27 01:47:16,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 149 transitions. [2020-10-27 01:47:16,891 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 149 transitions. Word has length 35 [2020-10-27 01:47:16,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:16,891 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 149 transitions. [2020-10-27 01:47:16,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:47:16,891 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 149 transitions. [2020-10-27 01:47:16,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 01:47:16,892 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:16,892 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:16,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-27 01:47:16,892 INFO L429 AbstractCegarLoop]: === Iteration 65 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:16,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:16,892 INFO L82 PathProgramCache]: Analyzing trace with hash 281945013, now seen corresponding path program 39 times [2020-10-27 01:47:16,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:16,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1851510652] [2020-10-27 01:47:16,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:16,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:16,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:16,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:17,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:17,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 01:47:17,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:47:17,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1065 [2020-10-27 01:47:17,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:17,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:47:17,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:47:17,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 01:47:17,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:18,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:18,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:18,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:18,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:18,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:18,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:18,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:47:18,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:18,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:18,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:18,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:18,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:18,269 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-27 01:47:18,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1851510652] [2020-10-27 01:47:18,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:18,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:47:18,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800944534] [2020-10-27 01:47:18,270 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:47:18,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:18,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:47:18,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:47:18,271 INFO L87 Difference]: Start difference. First operand 110 states and 149 transitions. Second operand 16 states. [2020-10-27 01:47:19,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:19,543 INFO L93 Difference]: Finished difference Result 138 states and 177 transitions. [2020-10-27 01:47:19,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:47:19,544 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 35 [2020-10-27 01:47:19,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:19,546 INFO L225 Difference]: With dead ends: 138 [2020-10-27 01:47:19,546 INFO L226 Difference]: Without dead ends: 122 [2020-10-27 01:47:19,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2020-10-27 01:47:19,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-27 01:47:19,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 111. [2020-10-27 01:47:19,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-27 01:47:19,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 150 transitions. [2020-10-27 01:47:19,565 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 150 transitions. Word has length 35 [2020-10-27 01:47:19,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:19,565 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 150 transitions. [2020-10-27 01:47:19,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:47:19,565 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 150 transitions. [2020-10-27 01:47:19,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 01:47:19,566 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:19,566 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:19,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-10-27 01:47:19,566 INFO L429 AbstractCegarLoop]: === Iteration 66 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:19,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:19,566 INFO L82 PathProgramCache]: Analyzing trace with hash -133752025, now seen corresponding path program 24 times [2020-10-27 01:47:19,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:19,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [453203149] [2020-10-27 01:47:19,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:19,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:19,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:19,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:19,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:19,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 01:47:19,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:47:19,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 332 [2020-10-27 01:47:19,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:19,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:47:19,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:47:19,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:47:19,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:20,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:20,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:20,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:20,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:20,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:20,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:20,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:47:20,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:20,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:20,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:20,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:20,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:20,185 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-10-27 01:47:20,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [453203149] [2020-10-27 01:47:20,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:20,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:47:20,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041892764] [2020-10-27 01:47:20,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:47:20,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:20,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:47:20,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:47:20,187 INFO L87 Difference]: Start difference. First operand 111 states and 150 transitions. Second operand 15 states. [2020-10-27 01:47:21,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:21,230 INFO L93 Difference]: Finished difference Result 141 states and 180 transitions. [2020-10-27 01:47:21,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:47:21,231 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 35 [2020-10-27 01:47:21,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:21,232 INFO L225 Difference]: With dead ends: 141 [2020-10-27 01:47:21,232 INFO L226 Difference]: Without dead ends: 124 [2020-10-27 01:47:21,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:47:21,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-27 01:47:21,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 112. [2020-10-27 01:47:21,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-27 01:47:21,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 151 transitions. [2020-10-27 01:47:21,250 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 151 transitions. Word has length 35 [2020-10-27 01:47:21,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:21,250 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 151 transitions. [2020-10-27 01:47:21,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:47:21,250 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 151 transitions. [2020-10-27 01:47:21,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 01:47:21,250 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:21,250 INFO L422 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:21,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-10-27 01:47:21,250 INFO L429 AbstractCegarLoop]: === Iteration 67 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:21,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:21,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1793076587, now seen corresponding path program 25 times [2020-10-27 01:47:21,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:21,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [881478063] [2020-10-27 01:47:21,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:21,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:21,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:21,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:21,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:23,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:23,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 01:47:23,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:47:23,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2110 [2020-10-27 01:47:23,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:23,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 01:47:23,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:47:23,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:47:23,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:23,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:23,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:23,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:23,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:23,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:23,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:23,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:47:23,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:23,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:23,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:23,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:23,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:23,941 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 191 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:47:23,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [881478063] [2020-10-27 01:47:23,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:23,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 01:47:23,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241478892] [2020-10-27 01:47:23,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 01:47:23,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:23,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 01:47:23,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:47:23,943 INFO L87 Difference]: Start difference. First operand 112 states and 151 transitions. Second operand 24 states. [2020-10-27 01:47:26,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:26,874 INFO L93 Difference]: Finished difference Result 196 states and 301 transitions. [2020-10-27 01:47:26,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 01:47:26,875 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 35 [2020-10-27 01:47:26,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:26,876 INFO L225 Difference]: With dead ends: 196 [2020-10-27 01:47:26,876 INFO L226 Difference]: Without dead ends: 189 [2020-10-27 01:47:26,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=135, Invalid=1845, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 01:47:26,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-27 01:47:26,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 132. [2020-10-27 01:47:26,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-27 01:47:26,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 182 transitions. [2020-10-27 01:47:26,902 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 182 transitions. Word has length 35 [2020-10-27 01:47:26,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:26,902 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 182 transitions. [2020-10-27 01:47:26,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 01:47:26,902 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 182 transitions. [2020-10-27 01:47:26,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 01:47:26,903 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:26,903 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:26,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-10-27 01:47:26,903 INFO L429 AbstractCegarLoop]: === Iteration 68 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:26,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:26,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1265378324, now seen corresponding path program 40 times [2020-10-27 01:47:26,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:26,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [611620031] [2020-10-27 01:47:26,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:26,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:26,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:27,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:27,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 01:47:27,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:27,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 517 [2020-10-27 01:47:27,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:27,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 01:47:27,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 01:47:27,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 01:47:27,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:27,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:27,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:27,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:27,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:27,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:27,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:27,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:47:27,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:27,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:27,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:27,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:27,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:27,677 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-27 01:47:27,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [611620031] [2020-10-27 01:47:27,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:27,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:47:27,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365400441] [2020-10-27 01:47:27,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:47:27,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:27,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:47:27,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:47:27,678 INFO L87 Difference]: Start difference. First operand 132 states and 182 transitions. Second operand 13 states. [2020-10-27 01:47:28,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:28,641 INFO L93 Difference]: Finished difference Result 373 states and 516 transitions. [2020-10-27 01:47:28,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:47:28,642 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-10-27 01:47:28,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:28,644 INFO L225 Difference]: With dead ends: 373 [2020-10-27 01:47:28,644 INFO L226 Difference]: Without dead ends: 359 [2020-10-27 01:47:28,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:47:28,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2020-10-27 01:47:28,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 137. [2020-10-27 01:47:28,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-27 01:47:28,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 190 transitions. [2020-10-27 01:47:28,671 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 190 transitions. Word has length 36 [2020-10-27 01:47:28,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:28,671 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 190 transitions. [2020-10-27 01:47:28,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:47:28,672 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 190 transitions. [2020-10-27 01:47:28,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 01:47:28,672 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:28,672 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:28,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-10-27 01:47:28,672 INFO L429 AbstractCegarLoop]: === Iteration 69 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:28,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:28,673 INFO L82 PathProgramCache]: Analyzing trace with hash 198753764, now seen corresponding path program 41 times [2020-10-27 01:47:28,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:28,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [947529377] [2020-10-27 01:47:28,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:28,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:28,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:28,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:31,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:31,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 01:47:31,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:47:31,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2804 [2020-10-27 01:47:31,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:31,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 01:47:31,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:47:31,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 01:47:31,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:31,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:31,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:31,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:31,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:31,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:31,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:31,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:47:31,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:31,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:31,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:31,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:31,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:31,873 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-27 01:47:31,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [947529377] [2020-10-27 01:47:31,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:31,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 01:47:31,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482111952] [2020-10-27 01:47:31,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 01:47:31,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:31,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 01:47:31,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:47:31,874 INFO L87 Difference]: Start difference. First operand 137 states and 190 transitions. Second operand 18 states. [2020-10-27 01:47:33,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:33,456 INFO L93 Difference]: Finished difference Result 163 states and 216 transitions. [2020-10-27 01:47:33,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 01:47:33,457 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 36 [2020-10-27 01:47:33,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:33,458 INFO L225 Difference]: With dead ends: 163 [2020-10-27 01:47:33,458 INFO L226 Difference]: Without dead ends: 148 [2020-10-27 01:47:33,459 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=158, Invalid=1248, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 01:47:33,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-27 01:47:33,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 138. [2020-10-27 01:47:33,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-27 01:47:33,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 191 transitions. [2020-10-27 01:47:33,485 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 191 transitions. Word has length 36 [2020-10-27 01:47:33,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:33,485 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 191 transitions. [2020-10-27 01:47:33,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 01:47:33,485 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 191 transitions. [2020-10-27 01:47:33,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 01:47:33,485 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:33,485 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:33,486 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2020-10-27 01:47:33,486 INFO L429 AbstractCegarLoop]: === Iteration 70 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:33,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:33,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1973326420, now seen corresponding path program 42 times [2020-10-27 01:47:33,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:33,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [356117508] [2020-10-27 01:47:33,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:33,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:33,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:33,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:35,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:35,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 01:47:35,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:47:35,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1561 [2020-10-27 01:47:35,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:35,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:47:35,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:47:35,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:47:35,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:35,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:35,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:35,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:35,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:35,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:35,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:35,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:47:35,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:35,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:35,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:35,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:35,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:35,400 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-27 01:47:35,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [356117508] [2020-10-27 01:47:35,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:35,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:47:35,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480322119] [2020-10-27 01:47:35,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:47:35,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:35,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:47:35,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:47:35,403 INFO L87 Difference]: Start difference. First operand 138 states and 191 transitions. Second operand 17 states. [2020-10-27 01:47:36,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:36,881 INFO L93 Difference]: Finished difference Result 166 states and 219 transitions. [2020-10-27 01:47:36,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 01:47:36,882 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 36 [2020-10-27 01:47:36,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:36,883 INFO L225 Difference]: With dead ends: 166 [2020-10-27 01:47:36,883 INFO L226 Difference]: Without dead ends: 150 [2020-10-27 01:47:36,884 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=140, Invalid=1120, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 01:47:36,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-27 01:47:36,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 139. [2020-10-27 01:47:36,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-27 01:47:36,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 192 transitions. [2020-10-27 01:47:36,917 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 192 transitions. Word has length 36 [2020-10-27 01:47:36,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:36,918 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 192 transitions. [2020-10-27 01:47:36,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:47:36,918 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 192 transitions. [2020-10-27 01:47:36,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 01:47:36,918 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:36,919 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 01:47:36,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2020-10-27 01:47:36,919 INFO L429 AbstractCegarLoop]: === Iteration 71 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:36,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:36,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1189310556, now seen corresponding path program 43 times [2020-10-27 01:47:36,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:36,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1771786141] [2020-10-27 01:47:36,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:36,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:36,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:37,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:37,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:37,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 01:47:37,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:47:37,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 859 [2020-10-27 01:47:37,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:37,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:47:37,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:47:37,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 01:47:37,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:38,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:38,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:38,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:38,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:38,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:38,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:38,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:47:38,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:38,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:38,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:38,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:38,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:38,095 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-10-27 01:47:38,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1771786141] [2020-10-27 01:47:38,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:38,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:47:38,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459614120] [2020-10-27 01:47:38,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:47:38,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:38,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:47:38,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:47:38,097 INFO L87 Difference]: Start difference. First operand 139 states and 192 transitions. Second operand 16 states. [2020-10-27 01:47:39,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:39,322 INFO L93 Difference]: Finished difference Result 169 states and 222 transitions. [2020-10-27 01:47:39,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:47:39,323 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 36 [2020-10-27 01:47:39,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:39,324 INFO L225 Difference]: With dead ends: 169 [2020-10-27 01:47:39,324 INFO L226 Difference]: Without dead ends: 152 [2020-10-27 01:47:39,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2020-10-27 01:47:39,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-27 01:47:39,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 140. [2020-10-27 01:47:39,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-27 01:47:39,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 193 transitions. [2020-10-27 01:47:39,355 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 193 transitions. Word has length 36 [2020-10-27 01:47:39,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:39,355 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 193 transitions. [2020-10-27 01:47:39,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:47:39,355 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 193 transitions. [2020-10-27 01:47:39,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 01:47:39,355 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:39,356 INFO L422 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:39,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2020-10-27 01:47:39,356 INFO L429 AbstractCegarLoop]: === Iteration 72 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:39,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:39,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1784264243, now seen corresponding path program 26 times [2020-10-27 01:47:39,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:39,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1649621688] [2020-10-27 01:47:39,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:39,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:39,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:39,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:40,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:41,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:41,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 01:47:41,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:47:41,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2337 [2020-10-27 01:47:41,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:41,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 01:47:41,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:47:41,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 01:47:41,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:42,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:42,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:42,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:42,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:42,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:42,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:42,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:47:42,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:42,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:42,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:42,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:42,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:42,339 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:47:42,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1649621688] [2020-10-27 01:47:42,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:42,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 01:47:42,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135745598] [2020-10-27 01:47:42,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 01:47:42,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:42,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 01:47:42,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:47:42,340 INFO L87 Difference]: Start difference. First operand 140 states and 193 transitions. Second operand 25 states. [2020-10-27 01:47:45,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:45,580 INFO L93 Difference]: Finished difference Result 198 states and 292 transitions. [2020-10-27 01:47:45,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 01:47:45,581 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 36 [2020-10-27 01:47:45,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:45,582 INFO L225 Difference]: With dead ends: 198 [2020-10-27 01:47:45,582 INFO L226 Difference]: Without dead ends: 190 [2020-10-27 01:47:45,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=137, Invalid=2025, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 01:47:45,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-27 01:47:45,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 127. [2020-10-27 01:47:45,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-27 01:47:45,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 172 transitions. [2020-10-27 01:47:45,612 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 172 transitions. Word has length 36 [2020-10-27 01:47:45,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:45,613 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 172 transitions. [2020-10-27 01:47:45,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 01:47:45,613 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 172 transitions. [2020-10-27 01:47:45,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 01:47:45,613 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:45,613 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:45,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2020-10-27 01:47:45,614 INFO L429 AbstractCegarLoop]: === Iteration 73 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:45,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:45,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1656177259, now seen corresponding path program 44 times [2020-10-27 01:47:45,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:45,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [747847394] [2020-10-27 01:47:45,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:45,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:45,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:45,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:49,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:49,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 01:47:49,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:47:49,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4265 [2020-10-27 01:47:49,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:49,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 01:47:49,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:47:49,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:47:49,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:50,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:50,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:50,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:50,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:50,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:50,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:50,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:47:50,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:50,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:50,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:50,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:50,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:50,293 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-27 01:47:50,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [747847394] [2020-10-27 01:47:50,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:50,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 01:47:50,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807799292] [2020-10-27 01:47:50,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 01:47:50,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:50,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 01:47:50,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:47:50,294 INFO L87 Difference]: Start difference. First operand 127 states and 172 transitions. Second operand 19 states. [2020-10-27 01:47:51,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:51,500 INFO L93 Difference]: Finished difference Result 141 states and 185 transitions. [2020-10-27 01:47:51,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:47:51,501 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 37 [2020-10-27 01:47:51,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:51,502 INFO L225 Difference]: With dead ends: 141 [2020-10-27 01:47:51,502 INFO L226 Difference]: Without dead ends: 117 [2020-10-27 01:47:51,503 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=115, Invalid=1075, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:47:51,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-27 01:47:51,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2020-10-27 01:47:51,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-27 01:47:51,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 160 transitions. [2020-10-27 01:47:51,528 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 160 transitions. Word has length 37 [2020-10-27 01:47:51,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:51,528 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 160 transitions. [2020-10-27 01:47:51,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 01:47:51,528 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 160 transitions. [2020-10-27 01:47:51,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 01:47:51,529 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:51,529 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:51,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2020-10-27 01:47:51,529 INFO L429 AbstractCegarLoop]: === Iteration 74 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:51,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:51,530 INFO L82 PathProgramCache]: Analyzing trace with hash -503636793, now seen corresponding path program 45 times [2020-10-27 01:47:51,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:51,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1711502532] [2020-10-27 01:47:51,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:51,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:51,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:51,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:55,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:55,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 01:47:55,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:47:55,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3783 [2020-10-27 01:47:55,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:55,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 01:47:55,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:47:55,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:47:55,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:55,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:55,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:55,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:55,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:55,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:55,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:55,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:47:55,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:55,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:55,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:55,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:55,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:55,730 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-27 01:47:55,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1711502532] [2020-10-27 01:47:55,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:55,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 01:47:55,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937753335] [2020-10-27 01:47:55,730 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 01:47:55,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:55,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 01:47:55,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:47:55,731 INFO L87 Difference]: Start difference. First operand 117 states and 160 transitions. Second operand 19 states. [2020-10-27 01:47:57,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:57,105 INFO L93 Difference]: Finished difference Result 143 states and 186 transitions. [2020-10-27 01:47:57,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:47:57,106 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 37 [2020-10-27 01:47:57,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:57,107 INFO L225 Difference]: With dead ends: 143 [2020-10-27 01:47:57,107 INFO L226 Difference]: Without dead ends: 128 [2020-10-27 01:47:57,108 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=131, Invalid=1059, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:47:57,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-27 01:47:57,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 118. [2020-10-27 01:47:57,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-27 01:47:57,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 161 transitions. [2020-10-27 01:47:57,125 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 161 transitions. Word has length 37 [2020-10-27 01:47:57,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:57,126 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 161 transitions. [2020-10-27 01:47:57,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 01:47:57,126 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 161 transitions. [2020-10-27 01:47:57,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 01:47:57,126 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:57,127 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:57,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2020-10-27 01:47:57,127 INFO L429 AbstractCegarLoop]: === Iteration 75 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:57,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:57,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1428424811, now seen corresponding path program 46 times [2020-10-27 01:47:57,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:57,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2042013553] [2020-10-27 01:47:57,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:57,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:57,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:57,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:58,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:58,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 01:47:58,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:47:58,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1835 [2020-10-27 01:47:58,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:58,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 01:47:58,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:47:58,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 01:47:58,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:59,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:59,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:59,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:59,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:59,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:59,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:59,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:47:59,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:59,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:59,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:59,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:59,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:59,343 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-27 01:47:59,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2042013553] [2020-10-27 01:47:59,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:59,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 01:47:59,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930106838] [2020-10-27 01:47:59,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 01:47:59,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:59,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 01:47:59,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:47:59,344 INFO L87 Difference]: Start difference. First operand 118 states and 161 transitions. Second operand 18 states. [2020-10-27 01:48:00,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:00,910 INFO L93 Difference]: Finished difference Result 146 states and 189 transitions. [2020-10-27 01:48:00,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 01:48:00,910 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 37 [2020-10-27 01:48:00,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:00,911 INFO L225 Difference]: With dead ends: 146 [2020-10-27 01:48:00,912 INFO L226 Difference]: Without dead ends: 130 [2020-10-27 01:48:00,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 01:48:00,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-27 01:48:00,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 119. [2020-10-27 01:48:00,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-27 01:48:00,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 162 transitions. [2020-10-27 01:48:00,931 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 162 transitions. Word has length 37 [2020-10-27 01:48:00,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:00,931 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 162 transitions. [2020-10-27 01:48:00,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 01:48:00,931 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 162 transitions. [2020-10-27 01:48:00,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 01:48:00,932 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:00,932 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:00,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2020-10-27 01:48:00,932 INFO L429 AbstractCegarLoop]: === Iteration 76 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:00,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:00,932 INFO L82 PathProgramCache]: Analyzing trace with hash 448113351, now seen corresponding path program 47 times [2020-10-27 01:48:00,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:00,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1145661454] [2020-10-27 01:48:00,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:00,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:00,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:01,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:02,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:02,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 01:48:02,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:48:02,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1337 [2020-10-27 01:48:02,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:02,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:48:02,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:48:02,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:48:02,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:02,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:02,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:02,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:02,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:02,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:02,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:02,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:48:02,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:02,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:02,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:02,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:02,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:02,614 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-10-27 01:48:02,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1145661454] [2020-10-27 01:48:02,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:02,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:48:02,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929479976] [2020-10-27 01:48:02,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:48:02,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:02,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:48:02,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:48:02,615 INFO L87 Difference]: Start difference. First operand 119 states and 162 transitions. Second operand 17 states. [2020-10-27 01:48:04,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:04,049 INFO L93 Difference]: Finished difference Result 149 states and 192 transitions. [2020-10-27 01:48:04,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 01:48:04,050 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 37 [2020-10-27 01:48:04,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:04,051 INFO L225 Difference]: With dead ends: 149 [2020-10-27 01:48:04,051 INFO L226 Difference]: Without dead ends: 132 [2020-10-27 01:48:04,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=119, Invalid=1003, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 01:48:04,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-27 01:48:04,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 120. [2020-10-27 01:48:04,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-27 01:48:04,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 163 transitions. [2020-10-27 01:48:04,072 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 163 transitions. Word has length 37 [2020-10-27 01:48:04,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:04,072 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 163 transitions. [2020-10-27 01:48:04,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:48:04,073 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 163 transitions. [2020-10-27 01:48:04,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 01:48:04,073 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:04,073 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:04,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2020-10-27 01:48:04,074 INFO L429 AbstractCegarLoop]: === Iteration 77 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:04,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:04,074 INFO L82 PathProgramCache]: Analyzing trace with hash 446407061, now seen corresponding path program 27 times [2020-10-27 01:48:04,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:04,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [590950051] [2020-10-27 01:48:04,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:04,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:04,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:04,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:04,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:04,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 01:48:04,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:48:04,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 482 [2020-10-27 01:48:04,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:04,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:48:04,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:48:04,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 01:48:04,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:04,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:04,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:04,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:04,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:04,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:04,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:04,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:48:04,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:04,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:04,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:04,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:04,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:04,879 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-10-27 01:48:04,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [590950051] [2020-10-27 01:48:04,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:04,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:48:04,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695010015] [2020-10-27 01:48:04,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:48:04,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:04,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:48:04,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:48:04,881 INFO L87 Difference]: Start difference. First operand 120 states and 163 transitions. Second operand 16 states. [2020-10-27 01:48:06,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:06,055 INFO L93 Difference]: Finished difference Result 152 states and 195 transitions. [2020-10-27 01:48:06,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:48:06,056 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 37 [2020-10-27 01:48:06,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:06,057 INFO L225 Difference]: With dead ends: 152 [2020-10-27 01:48:06,057 INFO L226 Difference]: Without dead ends: 134 [2020-10-27 01:48:06,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=83, Invalid=729, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:48:06,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-27 01:48:06,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 121. [2020-10-27 01:48:06,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-27 01:48:06,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 164 transitions. [2020-10-27 01:48:06,080 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 164 transitions. Word has length 37 [2020-10-27 01:48:06,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:06,080 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 164 transitions. [2020-10-27 01:48:06,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:48:06,080 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 164 transitions. [2020-10-27 01:48:06,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 01:48:06,081 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:06,081 INFO L422 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:06,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2020-10-27 01:48:06,081 INFO L429 AbstractCegarLoop]: === Iteration 78 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:06,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:06,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1012680277, now seen corresponding path program 28 times [2020-10-27 01:48:06,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:06,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [293493802] [2020-10-27 01:48:06,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:06,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:06,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:06,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:06,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:09,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:09,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 01:48:09,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:48:09,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3105 [2020-10-27 01:48:09,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:09,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 01:48:09,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:48:09,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 01:48:09,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:09,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:09,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:09,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:09,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:09,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:09,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:09,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:48:09,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:09,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:09,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:09,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:09,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:09,924 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 0 proven. 232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:48:09,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [293493802] [2020-10-27 01:48:09,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:09,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 01:48:09,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337407384] [2020-10-27 01:48:09,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 01:48:09,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:09,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 01:48:09,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=599, Unknown=0, NotChecked=0, Total=650 [2020-10-27 01:48:09,926 INFO L87 Difference]: Start difference. First operand 121 states and 164 transitions. Second operand 26 states. [2020-10-27 01:48:13,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:13,690 INFO L93 Difference]: Finished difference Result 218 states and 339 transitions. [2020-10-27 01:48:13,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 01:48:13,691 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 37 [2020-10-27 01:48:13,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:13,692 INFO L225 Difference]: With dead ends: 218 [2020-10-27 01:48:13,692 INFO L226 Difference]: Without dead ends: 211 [2020-10-27 01:48:13,693 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=147, Invalid=2205, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 01:48:13,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-10-27 01:48:13,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 143. [2020-10-27 01:48:13,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-27 01:48:13,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 198 transitions. [2020-10-27 01:48:13,713 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 198 transitions. Word has length 37 [2020-10-27 01:48:13,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:13,713 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 198 transitions. [2020-10-27 01:48:13,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 01:48:13,713 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 198 transitions. [2020-10-27 01:48:13,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 01:48:13,714 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:13,714 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:13,714 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2020-10-27 01:48:13,714 INFO L429 AbstractCegarLoop]: === Iteration 79 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:13,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:13,714 INFO L82 PathProgramCache]: Analyzing trace with hash -802907580, now seen corresponding path program 48 times [2020-10-27 01:48:13,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:13,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [678868847] [2020-10-27 01:48:13,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:13,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:13,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:13,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:18,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:18,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 01:48:18,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:48:18,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 01:48:18,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:18,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 01:48:18,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:48:18,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 01:48:18,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:19,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:19,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:19,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:19,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:19,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:19,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:19,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:48:19,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:19,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:19,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:19,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:19,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:19,193 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-27 01:48:19,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [678868847] [2020-10-27 01:48:19,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:19,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 01:48:19,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776523388] [2020-10-27 01:48:19,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 01:48:19,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:19,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 01:48:19,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:48:19,195 INFO L87 Difference]: Start difference. First operand 143 states and 198 transitions. Second operand 20 states. [2020-10-27 01:48:20,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:20,832 INFO L93 Difference]: Finished difference Result 169 states and 224 transitions. [2020-10-27 01:48:20,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 01:48:20,833 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2020-10-27 01:48:20,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:20,834 INFO L225 Difference]: With dead ends: 169 [2020-10-27 01:48:20,834 INFO L226 Difference]: Without dead ends: 154 [2020-10-27 01:48:20,835 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=142, Invalid=1190, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 01:48:20,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-27 01:48:20,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 144. [2020-10-27 01:48:20,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-27 01:48:20,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 199 transitions. [2020-10-27 01:48:20,856 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 199 transitions. Word has length 38 [2020-10-27 01:48:20,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:20,857 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 199 transitions. [2020-10-27 01:48:20,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 01:48:20,857 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 199 transitions. [2020-10-27 01:48:20,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 01:48:20,857 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:20,857 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:20,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2020-10-27 01:48:20,858 INFO L429 AbstractCegarLoop]: === Iteration 80 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:20,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:20,858 INFO L82 PathProgramCache]: Analyzing trace with hash 491469428, now seen corresponding path program 49 times [2020-10-27 01:48:20,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:20,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [385641919] [2020-10-27 01:48:20,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:20,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:20,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:20,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:24,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:24,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 01:48:24,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:48:24,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4000 [2020-10-27 01:48:24,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:24,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 01:48:24,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:48:24,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:48:24,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:25,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:25,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:25,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:25,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:25,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:25,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:25,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:48:25,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:25,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:25,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:25,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:25,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:25,302 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-27 01:48:25,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [385641919] [2020-10-27 01:48:25,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:25,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 01:48:25,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061671774] [2020-10-27 01:48:25,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 01:48:25,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:25,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 01:48:25,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:48:25,304 INFO L87 Difference]: Start difference. First operand 144 states and 199 transitions. Second operand 19 states. [2020-10-27 01:48:27,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:27,153 INFO L93 Difference]: Finished difference Result 172 states and 227 transitions. [2020-10-27 01:48:27,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 01:48:27,154 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 38 [2020-10-27 01:48:27,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:27,155 INFO L225 Difference]: With dead ends: 172 [2020-10-27 01:48:27,156 INFO L226 Difference]: Without dead ends: 156 [2020-10-27 01:48:27,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=164, Invalid=1396, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 01:48:27,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-27 01:48:27,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 145. [2020-10-27 01:48:27,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-27 01:48:27,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 200 transitions. [2020-10-27 01:48:27,188 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 200 transitions. Word has length 38 [2020-10-27 01:48:27,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:27,189 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 200 transitions. [2020-10-27 01:48:27,189 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 01:48:27,189 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 200 transitions. [2020-10-27 01:48:27,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 01:48:27,190 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:27,190 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:27,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2020-10-27 01:48:27,190 INFO L429 AbstractCegarLoop]: === Iteration 81 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:27,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:27,191 INFO L82 PathProgramCache]: Analyzing trace with hash -331353084, now seen corresponding path program 50 times [2020-10-27 01:48:27,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:27,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1359393360] [2020-10-27 01:48:27,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:27,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:27,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:27,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:29,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:29,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 01:48:29,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:48:29,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2070 [2020-10-27 01:48:29,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:29,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 01:48:29,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:48:29,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 01:48:29,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:29,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:29,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:29,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:29,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:29,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:29,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:29,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:48:29,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:29,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:29,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:29,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:29,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:29,687 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-10-27 01:48:29,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1359393360] [2020-10-27 01:48:29,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:29,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 01:48:29,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986115280] [2020-10-27 01:48:29,687 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 01:48:29,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:29,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 01:48:29,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:48:29,688 INFO L87 Difference]: Start difference. First operand 145 states and 200 transitions. Second operand 18 states. [2020-10-27 01:48:31,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:31,471 INFO L93 Difference]: Finished difference Result 175 states and 230 transitions. [2020-10-27 01:48:31,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 01:48:31,472 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 38 [2020-10-27 01:48:31,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:31,473 INFO L225 Difference]: With dead ends: 175 [2020-10-27 01:48:31,474 INFO L226 Difference]: Without dead ends: 158 [2020-10-27 01:48:31,474 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=146, Invalid=1260, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 01:48:31,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-27 01:48:31,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 146. [2020-10-27 01:48:31,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-27 01:48:31,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 201 transitions. [2020-10-27 01:48:31,496 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 201 transitions. Word has length 38 [2020-10-27 01:48:31,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:31,496 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 201 transitions. [2020-10-27 01:48:31,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 01:48:31,496 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 201 transitions. [2020-10-27 01:48:31,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 01:48:31,496 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:31,496 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 01:48:31,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2020-10-27 01:48:31,497 INFO L429 AbstractCegarLoop]: === Iteration 82 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:31,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:31,497 INFO L82 PathProgramCache]: Analyzing trace with hash 411148468, now seen corresponding path program 51 times [2020-10-27 01:48:31,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:31,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [384413157] [2020-10-27 01:48:31,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:31,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:31,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:31,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:32,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:32,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 01:48:32,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:48:32,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 945 [2020-10-27 01:48:32,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:32,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:48:32,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:48:32,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:48:32,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:32,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:32,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:32,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:32,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:32,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:32,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:32,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:48:32,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:32,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:32,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:32,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:32,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:32,821 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-10-27 01:48:32,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [384413157] [2020-10-27 01:48:32,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:32,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:48:32,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648581389] [2020-10-27 01:48:32,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:48:32,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:32,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:48:32,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:48:32,823 INFO L87 Difference]: Start difference. First operand 146 states and 201 transitions. Second operand 17 states. [2020-10-27 01:48:34,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:34,334 INFO L93 Difference]: Finished difference Result 178 states and 233 transitions. [2020-10-27 01:48:34,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:48:34,335 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 38 [2020-10-27 01:48:34,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:34,336 INFO L225 Difference]: With dead ends: 178 [2020-10-27 01:48:34,336 INFO L226 Difference]: Without dead ends: 160 [2020-10-27 01:48:34,337 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=100, Invalid=892, Unknown=0, NotChecked=0, Total=992 [2020-10-27 01:48:34,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-27 01:48:34,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 147. [2020-10-27 01:48:34,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-27 01:48:34,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 202 transitions. [2020-10-27 01:48:34,373 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 202 transitions. Word has length 38 [2020-10-27 01:48:34,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:34,373 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 202 transitions. [2020-10-27 01:48:34,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:48:34,373 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 202 transitions. [2020-10-27 01:48:34,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 01:48:34,374 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:34,374 INFO L422 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:34,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2020-10-27 01:48:34,374 INFO L429 AbstractCegarLoop]: === Iteration 83 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:34,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:34,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1431586189, now seen corresponding path program 29 times [2020-10-27 01:48:34,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:34,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [182237740] [2020-10-27 01:48:34,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:34,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:34,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:34,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:35,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:37,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:37,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 01:48:37,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:48:37,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3319 [2020-10-27 01:48:37,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:37,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 01:48:37,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:48:37,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:48:37,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:38,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:38,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:38,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:38,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:38,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:38,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:38,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:48:38,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:38,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:38,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:38,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:38,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:38,505 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:48:38,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [182237740] [2020-10-27 01:48:38,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:38,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 01:48:38,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487656441] [2020-10-27 01:48:38,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 01:48:38,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:38,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 01:48:38,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:48:38,507 INFO L87 Difference]: Start difference. First operand 147 states and 202 transitions. Second operand 27 states. [2020-10-27 01:48:42,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:42,523 INFO L93 Difference]: Finished difference Result 207 states and 305 transitions. [2020-10-27 01:48:42,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 01:48:42,524 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 38 [2020-10-27 01:48:42,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:42,525 INFO L225 Difference]: With dead ends: 207 [2020-10-27 01:48:42,525 INFO L226 Difference]: Without dead ends: 199 [2020-10-27 01:48:42,526 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=149, Invalid=2401, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 01:48:42,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-27 01:48:42,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 134. [2020-10-27 01:48:42,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-27 01:48:42,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 181 transitions. [2020-10-27 01:48:42,560 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 181 transitions. Word has length 38 [2020-10-27 01:48:42,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:42,560 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 181 transitions. [2020-10-27 01:48:42,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 01:48:42,560 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 181 transitions. [2020-10-27 01:48:42,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 01:48:42,561 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:42,561 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:42,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2020-10-27 01:48:42,561 INFO L429 AbstractCegarLoop]: === Iteration 84 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:42,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:42,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1490367385, now seen corresponding path program 52 times [2020-10-27 01:48:42,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:42,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1538570844] [2020-10-27 01:48:42,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:42,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:42,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:43,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:43,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 01:48:43,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:43,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 823 [2020-10-27 01:48:43,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:43,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 01:48:43,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 01:48:43,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:48:43,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:43,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:43,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:43,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:43,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:43,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:43,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:43,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:48:43,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:43,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:43,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:43,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:43,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:43,731 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-27 01:48:43,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1538570844] [2020-10-27 01:48:43,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:43,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:48:43,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614367166] [2020-10-27 01:48:43,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:48:43,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:43,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:48:43,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:48:43,733 INFO L87 Difference]: Start difference. First operand 134 states and 181 transitions. Second operand 14 states. [2020-10-27 01:48:45,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:45,073 INFO L93 Difference]: Finished difference Result 437 states and 602 transitions. [2020-10-27 01:48:45,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:48:45,074 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 39 [2020-10-27 01:48:45,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:45,076 INFO L225 Difference]: With dead ends: 437 [2020-10-27 01:48:45,076 INFO L226 Difference]: Without dead ends: 422 [2020-10-27 01:48:45,077 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:48:45,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2020-10-27 01:48:45,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 137. [2020-10-27 01:48:45,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-27 01:48:45,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 186 transitions. [2020-10-27 01:48:45,103 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 186 transitions. Word has length 39 [2020-10-27 01:48:45,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:45,103 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 186 transitions. [2020-10-27 01:48:45,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:48:45,103 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 186 transitions. [2020-10-27 01:48:45,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 01:48:45,104 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:45,104 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:45,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2020-10-27 01:48:45,104 INFO L429 AbstractCegarLoop]: === Iteration 85 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:45,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:45,105 INFO L82 PathProgramCache]: Analyzing trace with hash -121351307, now seen corresponding path program 53 times [2020-10-27 01:48:45,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:45,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1924352885] [2020-10-27 01:48:45,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:45,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:45,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:45,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking...