/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/loop-acceleration/diamond_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:31:23,189 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:31:23,192 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:31:23,227 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:31:23,228 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:31:23,230 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:31:23,231 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:31:23,234 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:31:23,236 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:31:23,238 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:31:23,239 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:31:23,241 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:31:23,241 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:31:23,242 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:31:23,244 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:31:23,245 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:31:23,247 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:31:23,248 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:31:23,250 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:31:23,253 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:31:23,255 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:31:23,257 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:31:23,258 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:31:23,259 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:31:23,263 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:31:23,263 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:31:23,264 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:31:23,265 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:31:23,266 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:31:23,267 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:31:23,268 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:31:23,269 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:31:23,270 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:31:23,271 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:31:23,272 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:31:23,273 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:31:23,274 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:31:23,274 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:31:23,275 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:31:23,276 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:31:23,279 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:31:23,280 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 01:31:23,318 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:31:23,319 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:31:23,320 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:31:23,321 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:31:23,321 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:31:23,321 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:31:23,322 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:31:23,322 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:31:23,322 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:31:23,322 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:31:23,323 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:31:23,323 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:31:23,323 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:31:23,324 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:31:23,324 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:31:23,324 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:31:23,325 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:31:23,327 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:31:23,328 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:31:23,328 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:31:23,328 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:31:23,329 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:31:23,329 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:31:23,330 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:31:23,331 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:31:23,331 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:31:23,332 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:31:23,332 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:31:23,332 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:31:23,333 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:31:23,864 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:31:23,915 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:31:23,918 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:31:23,920 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:31:23,921 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:31:23,924 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/diamond_1-1.c [2020-10-27 01:31:24,013 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/acf621b59/c99b94b29aec4f0fb3b068b1aa3f4b46/FLAG12e0568b9 [2020-10-27 01:31:24,652 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:31:24,653 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/diamond_1-1.c [2020-10-27 01:31:24,659 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/acf621b59/c99b94b29aec4f0fb3b068b1aa3f4b46/FLAG12e0568b9 [2020-10-27 01:31:25,010 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/acf621b59/c99b94b29aec4f0fb3b068b1aa3f4b46 [2020-10-27 01:31:25,014 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:31:25,020 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:31:25,022 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:31:25,023 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:31:25,027 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:31:25,028 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:31:25" (1/1) ... [2020-10-27 01:31:25,031 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c121fa2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:31:25, skipping insertion in model container [2020-10-27 01:31:25,031 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:31:25" (1/1) ... [2020-10-27 01:31:25,040 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:31:25,055 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:31:25,217 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:31:25,228 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:31:25,261 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:31:25,284 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:31:25,284 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:31:25 WrapperNode [2020-10-27 01:31:25,285 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:31:25,286 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:31:25,287 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:31:25,287 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:31:25,301 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:31:25" (1/1) ... [2020-10-27 01:31:25,304 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:31:25" (1/1) ... [2020-10-27 01:31:25,318 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:31:25" (1/1) ... [2020-10-27 01:31:25,318 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:31:25" (1/1) ... [2020-10-27 01:31:25,327 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:31:25" (1/1) ... [2020-10-27 01:31:25,332 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:31:25" (1/1) ... [2020-10-27 01:31:25,334 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:31:25" (1/1) ... [2020-10-27 01:31:25,336 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:31:25,337 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:31:25,337 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:31:25,337 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:31:25,338 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:31:25" (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 01:31:25,424 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:31:25,424 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:31:25,425 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:31:25,425 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 01:31:25,425 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:31:25,425 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:31:25,425 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:31:25,426 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:31:25,426 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:31:25,426 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-27 01:31:25,426 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 01:31:25,426 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:31:25,427 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:31:25,427 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:31:25,427 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:31:25,427 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:31:25,427 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:31:25,428 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:31:25,708 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:31:25,708 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 01:31:25,710 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:31:25 BoogieIcfgContainer [2020-10-27 01:31:25,711 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:31:25,713 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:31:25,713 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:31:25,717 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:31:25,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:31:25" (1/3) ... [2020-10-27 01:31:25,718 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ff49d41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:31:25, skipping insertion in model container [2020-10-27 01:31:25,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:31:25" (2/3) ... [2020-10-27 01:31:25,719 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ff49d41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:31:25, skipping insertion in model container [2020-10-27 01:31:25,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:31:25" (3/3) ... [2020-10-27 01:31:25,721 INFO L111 eAbstractionObserver]: Analyzing ICFG diamond_1-1.c [2020-10-27 01:31:25,735 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:31:25,741 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:31:25,756 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:31:25,796 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:31:25,796 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:31:25,796 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:31:25,796 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:31:25,796 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:31:25,797 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:31:25,797 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:31:25,797 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:31:25,848 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-10-27 01:31:25,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-27 01:31:25,854 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:25,855 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:25,856 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:25,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:25,869 INFO L82 PathProgramCache]: Analyzing trace with hash -2020849535, now seen corresponding path program 1 times [2020-10-27 01:31:25,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:25,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [868911835] [2020-10-27 01:31:25,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:26,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:26,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:26,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:26,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 01:31:26,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:26,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 166 [2020-10-27 01:31:26,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:26,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:26,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:31:26,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:26,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 01:31:26,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:26,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:26,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:26,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:26,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:26,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:26,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 01:31:26,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:26,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:26,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:26,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:26,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:31:26,375 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 01:31:26,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [868911835] [2020-10-27 01:31:26,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:31:26,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 01:31:26,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849699130] [2020-10-27 01:31:26,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 01:31:26,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:26,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 01:31:26,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 01:31:26,402 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2020-10-27 01:31:26,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:26,495 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2020-10-27 01:31:26,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 01:31:26,498 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-27 01:31:26,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:26,506 INFO L225 Difference]: With dead ends: 35 [2020-10-27 01:31:26,507 INFO L226 Difference]: Without dead ends: 14 [2020-10-27 01:31:26,510 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 01:31:26,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-27 01:31:26,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-27 01:31:26,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-27 01:31:26,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-10-27 01:31:26,555 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12 [2020-10-27 01:31:26,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:26,556 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-10-27 01:31:26,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 01:31:26,556 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-10-27 01:31:26,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-27 01:31:26,557 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:26,557 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:26,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:31:26,557 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:26,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:26,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1987826251, now seen corresponding path program 1 times [2020-10-27 01:31:26,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:26,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [594341532] [2020-10-27 01:31:26,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:26,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:26,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:26,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:26,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 01:31:26,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:26,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 135 [2020-10-27 01:31:26,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:26,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:31:26,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:26,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 01:31:26,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:31:26,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:26,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:26,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:26,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:26,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:26,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:26,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-27 01:31:26,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:26,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:26,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:26,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:26,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:26,892 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 01:31:26,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [594341532] [2020-10-27 01:31:26,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:31:26,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:31:26,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215383191] [2020-10-27 01:31:26,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:31:26,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:26,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:31:26,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:31:26,897 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 4 states. [2020-10-27 01:31:27,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:27,016 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2020-10-27 01:31:27,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:31:27,017 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-27 01:31:27,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:27,019 INFO L225 Difference]: With dead ends: 22 [2020-10-27 01:31:27,020 INFO L226 Difference]: Without dead ends: 16 [2020-10-27 01:31:27,021 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 01:31:27,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-27 01:31:27,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-10-27 01:31:27,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-27 01:31:27,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-10-27 01:31:27,029 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2020-10-27 01:31:27,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:27,030 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-10-27 01:31:27,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:31:27,030 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-10-27 01:31:27,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-27 01:31:27,031 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:27,031 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:27,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:31:27,031 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:27,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:27,032 INFO L82 PathProgramCache]: Analyzing trace with hash -1243554288, now seen corresponding path program 1 times [2020-10-27 01:31:27,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:27,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1529261632] [2020-10-27 01:31:27,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:27,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:27,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:27,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:27,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:27,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:27,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 01:31:27,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:31:27,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 503 [2020-10-27 01:31:27,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:27,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:31:27,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:27,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 01:31:27,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:31:27,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:27,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:27,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:27,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:27,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:27,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:27,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 01:31:27,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:27,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:27,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:27,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:27,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:27,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:31:27,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1529261632] [2020-10-27 01:31:27,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:27,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:31:27,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971333252] [2020-10-27 01:31:27,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:31:27,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:27,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:31:27,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:31:27,796 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 7 states. [2020-10-27 01:31:28,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:28,149 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2020-10-27 01:31:28,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:31:28,150 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-10-27 01:31:28,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:28,151 INFO L225 Difference]: With dead ends: 29 [2020-10-27 01:31:28,151 INFO L226 Difference]: Without dead ends: 18 [2020-10-27 01:31:28,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:31:28,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-27 01:31:28,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-27 01:31:28,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-27 01:31:28,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-10-27 01:31:28,159 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 14 [2020-10-27 01:31:28,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:28,159 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-10-27 01:31:28,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:31:28,159 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-10-27 01:31:28,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-27 01:31:28,160 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:28,160 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:28,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:31:28,161 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:28,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:28,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1276405646, now seen corresponding path program 1 times [2020-10-27 01:31:28,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:28,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [646638796] [2020-10-27 01:31:28,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:28,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:28,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:28,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:28,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:28,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 01:31:28,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:31:28,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 160 [2020-10-27 01:31:28,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:28,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:31:28,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:28,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 01:31:28,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 01:31:28,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:28,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:28,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:28,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:28,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:28,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:28,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 01:31:28,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:28,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:28,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:28,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:28,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:28,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:31:28,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [646638796] [2020-10-27 01:31:28,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:28,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 01:31:28,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675084579] [2020-10-27 01:31:28,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:31:28,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:28,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:31:28,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:31:28,493 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 5 states. [2020-10-27 01:31:28,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:28,677 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2020-10-27 01:31:28,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:31:28,678 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-10-27 01:31:28,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:28,679 INFO L225 Difference]: With dead ends: 26 [2020-10-27 01:31:28,680 INFO L226 Difference]: Without dead ends: 20 [2020-10-27 01:31:28,680 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:31:28,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-27 01:31:28,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2020-10-27 01:31:28,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-27 01:31:28,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-10-27 01:31:28,687 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 14 [2020-10-27 01:31:28,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:28,688 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-10-27 01:31:28,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:31:28,688 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-10-27 01:31:28,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 01:31:28,689 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:28,689 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:28,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:31:28,690 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:28,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:28,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1338897259, now seen corresponding path program 2 times [2020-10-27 01:31:28,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:28,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1918940140] [2020-10-27 01:31:28,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:28,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:28,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:28,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:29,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:29,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 01:31:29,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:31:29,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 397 [2020-10-27 01:31:29,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:29,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:31:29,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:29,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:31:29,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:29,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:29,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:29,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:29,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:29,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:29,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:29,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:31:29,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:29,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:29,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:29,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:29,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:29,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:31:29,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1918940140] [2020-10-27 01:31:29,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:29,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 01:31:29,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872253227] [2020-10-27 01:31:29,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:31:29,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:29,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:31:29,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:31:29,203 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 6 states. [2020-10-27 01:31:29,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:29,389 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2020-10-27 01:31:29,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:31:29,389 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-27 01:31:29,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:29,390 INFO L225 Difference]: With dead ends: 27 [2020-10-27 01:31:29,390 INFO L226 Difference]: Without dead ends: 21 [2020-10-27 01:31:29,391 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:31:29,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-27 01:31:29,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2020-10-27 01:31:29,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-27 01:31:29,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-10-27 01:31:29,398 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 16 [2020-10-27 01:31:29,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:29,398 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-10-27 01:31:29,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:31:29,398 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-10-27 01:31:29,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 01:31:29,399 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:29,399 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:29,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:31:29,400 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:29,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:29,400 INFO L82 PathProgramCache]: Analyzing trace with hash -2018955629, now seen corresponding path program 1 times [2020-10-27 01:31:29,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:29,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1929389379] [2020-10-27 01:31:29,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:29,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:29,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:29,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:29,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:29,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 01:31:29,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:31:29,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 143 [2020-10-27 01:31:29,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:29,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:31:29,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:31:29,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 01:31:29,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:29,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:29,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:29,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:29,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:29,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:29,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:29,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:31:29,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:29,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:29,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:29,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:29,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:29,612 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:31:29,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1929389379] [2020-10-27 01:31:29,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:31:29,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:31:29,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646559592] [2020-10-27 01:31:29,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:31:29,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:29,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:31:29,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:31:29,615 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 4 states. [2020-10-27 01:31:29,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:29,688 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2020-10-27 01:31:29,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:31:29,689 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-27 01:31:29,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:29,690 INFO L225 Difference]: With dead ends: 31 [2020-10-27 01:31:29,690 INFO L226 Difference]: Without dead ends: 23 [2020-10-27 01:31:29,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:31:29,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-27 01:31:29,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-10-27 01:31:29,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-27 01:31:29,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-10-27 01:31:29,699 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 16 [2020-10-27 01:31:29,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:29,699 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-10-27 01:31:29,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:31:29,700 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-10-27 01:31:29,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 01:31:29,700 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:29,701 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:29,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:31:29,701 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:29,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:29,702 INFO L82 PathProgramCache]: Analyzing trace with hash 501004305, now seen corresponding path program 2 times [2020-10-27 01:31:29,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:29,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [674285471] [2020-10-27 01:31:29,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:29,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:29,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:29,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:29,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:29,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 01:31:29,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:31:29,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 150 [2020-10-27 01:31:29,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:29,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:31:29,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:29,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 01:31:29,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:29,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:29,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:29,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:29,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:29,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:29,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:30,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:31:30,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:30,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:30,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:30,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:30,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:30,005 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:31:30,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [674285471] [2020-10-27 01:31:30,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:30,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:31:30,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324967197] [2020-10-27 01:31:30,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:31:30,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:30,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:31:30,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:31:30,007 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 8 states. [2020-10-27 01:31:30,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:30,374 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-10-27 01:31:30,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:31:30,375 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-10-27 01:31:30,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:30,376 INFO L225 Difference]: With dead ends: 30 [2020-10-27 01:31:30,376 INFO L226 Difference]: Without dead ends: 21 [2020-10-27 01:31:30,377 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:31:30,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-27 01:31:30,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-27 01:31:30,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-27 01:31:30,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-10-27 01:31:30,382 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2020-10-27 01:31:30,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:30,383 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-10-27 01:31:30,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:31:30,383 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-10-27 01:31:30,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 01:31:30,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:30,384 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:30,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 01:31:30,384 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:30,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:30,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1525788122, now seen corresponding path program 3 times [2020-10-27 01:31:30,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:30,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1015348267] [2020-10-27 01:31:30,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:30,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:30,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:30,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:30,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:30,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:30,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 01:31:30,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:31:30,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 481 [2020-10-27 01:31:30,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:30,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:31:30,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:30,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:31:30,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:30,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:30,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:30,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:31,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:31,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:31,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:31,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 01:31:31,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:31,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:31,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:31,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:31,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:31,008 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:31:31,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1015348267] [2020-10-27 01:31:31,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:31,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:31:31,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546433948] [2020-10-27 01:31:31,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:31:31,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:31,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:31:31,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:31:31,017 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 7 states. [2020-10-27 01:31:31,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:31,280 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-10-27 01:31:31,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:31:31,281 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-10-27 01:31:31,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:31,281 INFO L225 Difference]: With dead ends: 30 [2020-10-27 01:31:31,282 INFO L226 Difference]: Without dead ends: 24 [2020-10-27 01:31:31,282 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:31:31,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-27 01:31:31,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-10-27 01:31:31,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-27 01:31:31,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-10-27 01:31:31,289 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 18 [2020-10-27 01:31:31,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:31,289 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-10-27 01:31:31,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:31:31,289 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-10-27 01:31:31,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 01:31:31,290 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:31,290 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:31,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 01:31:31,291 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:31,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:31,291 INFO L82 PathProgramCache]: Analyzing trace with hash -249219240, now seen corresponding path program 2 times [2020-10-27 01:31:31,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:31,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1100135927] [2020-10-27 01:31:31,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:31,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:31,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:31,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:31,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:31,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 01:31:31,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:31:31,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-10-27 01:31:31,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:31,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:31:31,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:31:31,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 01:31:31,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:31:31,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:31,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:31,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:31,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:31,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:31,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:31,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:31:31,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:31,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:31,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:31,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:31,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:31,526 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 01:31:31,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1100135927] [2020-10-27 01:31:31,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:31:31,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:31:31,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822764339] [2020-10-27 01:31:31,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:31:31,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:31,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:31:31,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:31:31,529 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 4 states. [2020-10-27 01:31:31,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:31,595 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2020-10-27 01:31:31,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:31:31,596 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-27 01:31:31,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:31,597 INFO L225 Difference]: With dead ends: 29 [2020-10-27 01:31:31,597 INFO L226 Difference]: Without dead ends: 21 [2020-10-27 01:31:31,598 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 01:31:31,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-27 01:31:31,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-27 01:31:31,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-27 01:31:31,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-10-27 01:31:31,604 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2020-10-27 01:31:31,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:31,604 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-10-27 01:31:31,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:31:31,604 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-10-27 01:31:31,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 01:31:31,605 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:31,605 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:31,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 01:31:31,606 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:31,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:31,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1414402527, now seen corresponding path program 4 times [2020-10-27 01:31:31,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:31,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [931185242] [2020-10-27 01:31:31,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:31,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:31,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:31,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:32,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:32,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 01:31:32,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:31:32,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 558 [2020-10-27 01:31:32,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:32,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:31:32,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:32,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:31:32,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:32,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:32,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:32,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:32,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:32,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:32,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:32,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:31:32,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:32,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:32,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:32,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:32,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:32,295 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 01:31:32,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [931185242] [2020-10-27 01:31:32,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:32,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:31:32,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789533066] [2020-10-27 01:31:32,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:31:32,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:32,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:31:32,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:31:32,298 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 8 states. [2020-10-27 01:31:32,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:32,596 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-10-27 01:31:32,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:31:32,597 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-10-27 01:31:32,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:32,598 INFO L225 Difference]: With dead ends: 30 [2020-10-27 01:31:32,598 INFO L226 Difference]: Without dead ends: 24 [2020-10-27 01:31:32,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:31:32,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-27 01:31:32,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-10-27 01:31:32,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-27 01:31:32,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-10-27 01:31:32,606 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2020-10-27 01:31:32,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:32,606 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-10-27 01:31:32,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:31:32,607 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-10-27 01:31:32,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 01:31:32,607 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:32,608 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:32,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 01:31:32,608 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:32,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:32,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1747028132, now seen corresponding path program 5 times [2020-10-27 01:31:32,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:32,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [29841679] [2020-10-27 01:31:32,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:32,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:32,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:32,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:32,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:33,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:33,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 01:31:33,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:31:33,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 758 [2020-10-27 01:31:33,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:33,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:31:33,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:33,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 01:31:33,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:33,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:33,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:33,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:33,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:33,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:33,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:33,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:31:33,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:33,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:33,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:33,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:33,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:33,532 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:31:33,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [29841679] [2020-10-27 01:31:33,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:33,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:31:33,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579583176] [2020-10-27 01:31:33,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:31:33,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:33,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:31:33,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:31:33,535 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 9 states. [2020-10-27 01:31:33,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:33,864 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-10-27 01:31:33,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:31:33,865 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-10-27 01:31:33,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:33,865 INFO L225 Difference]: With dead ends: 32 [2020-10-27 01:31:33,866 INFO L226 Difference]: Without dead ends: 26 [2020-10-27 01:31:33,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:31:33,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-27 01:31:33,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-10-27 01:31:33,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-27 01:31:33,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2020-10-27 01:31:33,875 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2020-10-27 01:31:33,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:33,876 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2020-10-27 01:31:33,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:31:33,876 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2020-10-27 01:31:33,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 01:31:33,877 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:33,877 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:33,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 01:31:33,878 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:33,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:33,878 INFO L82 PathProgramCache]: Analyzing trace with hash -722312663, now seen corresponding path program 6 times [2020-10-27 01:31:33,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:33,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2073363588] [2020-10-27 01:31:33,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:33,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:33,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:33,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:34,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:34,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 01:31:34,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:31:34,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 671 [2020-10-27 01:31:34,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:34,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:31:34,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:34,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:31:34,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:34,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:34,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:34,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:34,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:34,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:34,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:34,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:31:34,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:34,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:34,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:34,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:34,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:34,725 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:31:34,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2073363588] [2020-10-27 01:31:34,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:34,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:31:34,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019446444] [2020-10-27 01:31:34,727 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:31:34,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:34,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:31:34,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:31:34,728 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 10 states. [2020-10-27 01:31:35,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:35,125 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-10-27 01:31:35,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:31:35,126 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-10-27 01:31:35,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:35,126 INFO L225 Difference]: With dead ends: 34 [2020-10-27 01:31:35,126 INFO L226 Difference]: Without dead ends: 28 [2020-10-27 01:31:35,127 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:31:35,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-27 01:31:35,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-10-27 01:31:35,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-27 01:31:35,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-10-27 01:31:35,133 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2020-10-27 01:31:35,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:35,134 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-10-27 01:31:35,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:31:35,134 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-10-27 01:31:35,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 01:31:35,135 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:35,135 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:35,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 01:31:35,135 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:35,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:35,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1358098030, now seen corresponding path program 7 times [2020-10-27 01:31:35,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:35,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2017422314] [2020-10-27 01:31:35,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:35,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:35,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:35,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:35,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:36,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:36,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 01:31:36,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:31:36,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 942 [2020-10-27 01:31:36,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:36,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:31:36,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:36,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 01:31:36,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:36,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:36,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:36,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:36,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:36,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:36,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:36,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:31:36,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:36,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:36,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:36,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:36,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:36,320 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:31:36,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2017422314] [2020-10-27 01:31:36,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:36,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:31:36,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243569214] [2020-10-27 01:31:36,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:31:36,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:36,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:31:36,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:31:36,323 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 13 states. [2020-10-27 01:31:37,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:37,141 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-10-27 01:31:37,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:31:37,141 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 26 [2020-10-27 01:31:37,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:37,142 INFO L225 Difference]: With dead ends: 36 [2020-10-27 01:31:37,142 INFO L226 Difference]: Without dead ends: 30 [2020-10-27 01:31:37,143 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:31:37,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-27 01:31:37,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-10-27 01:31:37,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-27 01:31:37,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-10-27 01:31:37,156 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2020-10-27 01:31:37,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:37,156 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-10-27 01:31:37,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:31:37,156 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-10-27 01:31:37,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 01:31:37,157 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:37,157 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:37,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 01:31:37,157 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:37,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:37,158 INFO L82 PathProgramCache]: Analyzing trace with hash -821985933, now seen corresponding path program 8 times [2020-10-27 01:31:37,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:37,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [133216431] [2020-10-27 01:31:37,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:37,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:37,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:37,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:37,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:37,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 01:31:37,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:31:37,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 717 [2020-10-27 01:31:37,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:37,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:31:37,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:37,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:31:37,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:38,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:38,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:38,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:38,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:38,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:38,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:38,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:31:38,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:38,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:38,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:38,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:38,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:38,099 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:31:38,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [133216431] [2020-10-27 01:31:38,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:38,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:31:38,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177036694] [2020-10-27 01:31:38,103 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:31:38,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:38,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:31:38,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:31:38,104 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 12 states. [2020-10-27 01:31:38,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:38,634 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-10-27 01:31:38,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:31:38,634 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-10-27 01:31:38,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:38,635 INFO L225 Difference]: With dead ends: 38 [2020-10-27 01:31:38,635 INFO L226 Difference]: Without dead ends: 32 [2020-10-27 01:31:38,639 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:31:38,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-27 01:31:38,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-10-27 01:31:38,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-27 01:31:38,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2020-10-27 01:31:38,648 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2020-10-27 01:31:38,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:38,650 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2020-10-27 01:31:38,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:31:38,650 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2020-10-27 01:31:38,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:31:38,652 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:38,652 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:38,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 01:31:38,652 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:38,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:38,654 INFO L82 PathProgramCache]: Analyzing trace with hash 61366072, now seen corresponding path program 9 times [2020-10-27 01:31:38,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:38,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [958753963] [2020-10-27 01:31:38,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:38,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:38,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:38,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:39,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:39,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:39,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:31:39,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:31:39,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1102 [2020-10-27 01:31:39,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:39,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:31:39,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:39,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:31:39,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:40,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:40,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:40,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:40,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:40,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:40,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:40,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:31:40,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:40,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:40,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:40,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:40,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:40,103 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:31:40,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [958753963] [2020-10-27 01:31:40,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:40,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:31:40,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371817936] [2020-10-27 01:31:40,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:31:40,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:40,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:31:40,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:31:40,108 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 15 states. [2020-10-27 01:31:41,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:41,014 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2020-10-27 01:31:41,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:31:41,014 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 30 [2020-10-27 01:31:41,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:41,015 INFO L225 Difference]: With dead ends: 40 [2020-10-27 01:31:41,015 INFO L226 Difference]: Without dead ends: 34 [2020-10-27 01:31:41,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:31:41,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-27 01:31:41,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-10-27 01:31:41,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-27 01:31:41,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-10-27 01:31:41,027 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2020-10-27 01:31:41,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:41,028 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-10-27 01:31:41,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:31:41,028 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-10-27 01:31:41,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:31:41,031 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:41,031 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:41,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 01:31:41,031 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:41,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:41,032 INFO L82 PathProgramCache]: Analyzing trace with hash -1440881731, now seen corresponding path program 10 times [2020-10-27 01:31:41,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:41,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1425019944] [2020-10-27 01:31:41,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:41,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:41,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:41,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:42,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:42,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:31:42,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:31:42,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1046 [2020-10-27 01:31:42,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:42,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:31:42,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:42,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 01:31:42,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:42,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:42,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:42,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:42,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:42,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:42,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:42,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:31:42,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:42,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:42,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:42,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:42,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:42,338 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:31:42,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1425019944] [2020-10-27 01:31:42,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:42,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:31:42,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368930997] [2020-10-27 01:31:42,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:31:42,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:42,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:31:42,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:31:42,342 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 14 states. [2020-10-27 01:31:43,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:43,048 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2020-10-27 01:31:43,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:31:43,049 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 32 [2020-10-27 01:31:43,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:43,050 INFO L225 Difference]: With dead ends: 42 [2020-10-27 01:31:43,050 INFO L226 Difference]: Without dead ends: 36 [2020-10-27 01:31:43,051 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:31:43,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-27 01:31:43,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-10-27 01:31:43,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-27 01:31:43,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-10-27 01:31:43,065 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2020-10-27 01:31:43,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:43,065 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-10-27 01:31:43,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:31:43,065 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-10-27 01:31:43,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 01:31:43,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:43,070 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:43,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 01:31:43,070 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:43,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:43,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1992008958, now seen corresponding path program 11 times [2020-10-27 01:31:43,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:43,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1307025097] [2020-10-27 01:31:43,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:43,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:43,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:43,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:43,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:44,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:44,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 01:31:44,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:31:44,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1443 [2020-10-27 01:31:44,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:44,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:31:44,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:44,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 01:31:44,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:44,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:44,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:44,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:44,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:44,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:44,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:44,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:31:44,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:44,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:44,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:44,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:44,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:44,882 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:31:44,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1307025097] [2020-10-27 01:31:44,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:44,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:31:44,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692904796] [2020-10-27 01:31:44,884 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:31:44,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:44,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:31:44,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:31:44,885 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 17 states. [2020-10-27 01:31:46,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:46,098 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-10-27 01:31:46,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:31:46,099 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 34 [2020-10-27 01:31:46,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:46,100 INFO L225 Difference]: With dead ends: 44 [2020-10-27 01:31:46,100 INFO L226 Difference]: Without dead ends: 38 [2020-10-27 01:31:46,101 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=99, Invalid=831, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:31:46,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-27 01:31:46,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-10-27 01:31:46,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-27 01:31:46,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-10-27 01:31:46,109 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2020-10-27 01:31:46,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:46,109 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-10-27 01:31:46,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:31:46,109 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-10-27 01:31:46,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 01:31:46,110 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:46,110 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:46,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 01:31:46,110 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:46,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:46,111 INFO L82 PathProgramCache]: Analyzing trace with hash 950670599, now seen corresponding path program 12 times [2020-10-27 01:31:46,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:46,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [72181017] [2020-10-27 01:31:46,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:46,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:46,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:46,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:47,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:47,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 01:31:47,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:31:47,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1118 [2020-10-27 01:31:47,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:47,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:31:47,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:47,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:31:47,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:47,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:47,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:47,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:47,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:47,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:47,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:47,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:31:47,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:47,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:47,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:47,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:47,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:47,557 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:31:47,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [72181017] [2020-10-27 01:31:47,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:47,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:31:47,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798198688] [2020-10-27 01:31:47,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:31:47,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:47,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:31:47,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:31:47,559 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 16 states. [2020-10-27 01:31:48,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:48,580 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-10-27 01:31:48,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:31:48,580 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 36 [2020-10-27 01:31:48,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:48,581 INFO L225 Difference]: With dead ends: 46 [2020-10-27 01:31:48,582 INFO L226 Difference]: Without dead ends: 40 [2020-10-27 01:31:48,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:31:48,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-27 01:31:48,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-10-27 01:31:48,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-27 01:31:48,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2020-10-27 01:31:48,591 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2020-10-27 01:31:48,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:48,592 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2020-10-27 01:31:48,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:31:48,592 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2020-10-27 01:31:48,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 01:31:48,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:48,593 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:48,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 01:31:48,593 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:48,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:48,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1517723188, now seen corresponding path program 13 times [2020-10-27 01:31:48,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:48,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1049118448] [2020-10-27 01:31:48,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:48,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:48,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:48,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:49,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:50,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:50,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 01:31:50,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:31:50,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1640 [2020-10-27 01:31:50,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:50,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:31:50,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:50,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 01:31:50,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:50,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:50,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:50,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:50,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:50,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:50,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:50,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:31:50,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:50,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:50,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:50,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:50,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:50,553 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:31:50,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1049118448] [2020-10-27 01:31:50,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:50,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:31:50,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378588341] [2020-10-27 01:31:50,555 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:31:50,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:50,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:31:50,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:31:50,556 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 17 states. [2020-10-27 01:31:51,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:51,473 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2020-10-27 01:31:51,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:31:51,474 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 38 [2020-10-27 01:31:51,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:51,475 INFO L225 Difference]: With dead ends: 48 [2020-10-27 01:31:51,475 INFO L226 Difference]: Without dead ends: 42 [2020-10-27 01:31:51,476 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:31:51,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-27 01:31:51,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-10-27 01:31:51,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-27 01:31:51,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2020-10-27 01:31:51,496 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2020-10-27 01:31:51,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:51,497 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2020-10-27 01:31:51,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:31:51,497 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2020-10-27 01:31:51,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 01:31:51,498 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:51,498 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:51,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 01:31:51,498 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:51,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:51,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1472762193, now seen corresponding path program 14 times [2020-10-27 01:31:51,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:51,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [100077043] [2020-10-27 01:31:51,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:51,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:51,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:51,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:53,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:53,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 01:31:53,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:31:53,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1550 [2020-10-27 01:31:53,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:53,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 01:31:53,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:53,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 01:31:53,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:53,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:53,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:53,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:53,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:53,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:53,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:53,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:31:53,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:53,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:53,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:53,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:53,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:53,455 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:31:53,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [100077043] [2020-10-27 01:31:53,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:53,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 01:31:53,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006711546] [2020-10-27 01:31:53,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 01:31:53,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:53,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 01:31:53,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:31:53,457 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 18 states. [2020-10-27 01:31:54,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:54,549 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2020-10-27 01:31:54,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:31:54,550 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 40 [2020-10-27 01:31:54,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:54,551 INFO L225 Difference]: With dead ends: 50 [2020-10-27 01:31:54,551 INFO L226 Difference]: Without dead ends: 44 [2020-10-27 01:31:54,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 01:31:54,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-27 01:31:54,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-10-27 01:31:54,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-27 01:31:54,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2020-10-27 01:31:54,574 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2020-10-27 01:31:54,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:54,574 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2020-10-27 01:31:54,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 01:31:54,575 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2020-10-27 01:31:54,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 01:31:54,575 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:54,575 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:54,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 01:31:54,576 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:54,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:54,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1996092310, now seen corresponding path program 15 times [2020-10-27 01:31:54,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:54,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1255676955] [2020-10-27 01:31:54,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:54,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:54,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:54,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:55,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:55,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:55,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 01:31:55,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:31:55,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1258 [2020-10-27 01:31:55,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:55,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 01:31:55,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:55,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 01:31:55,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:56,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:56,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:56,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:56,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:56,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:56,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:56,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:31:56,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:56,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:56,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:56,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:56,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:56,530 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:31:56,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1255676955] [2020-10-27 01:31:56,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:56,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 01:31:56,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925341030] [2020-10-27 01:31:56,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 01:31:56,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:56,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 01:31:56,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=375, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:31:56,533 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 21 states. [2020-10-27 01:31:58,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:58,203 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2020-10-27 01:31:58,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 01:31:58,203 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 42 [2020-10-27 01:31:58,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:58,204 INFO L225 Difference]: With dead ends: 52 [2020-10-27 01:31:58,204 INFO L226 Difference]: Without dead ends: 46 [2020-10-27 01:31:58,206 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=133, Invalid=1349, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 01:31:58,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-27 01:31:58,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-10-27 01:31:58,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-27 01:31:58,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2020-10-27 01:31:58,215 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2020-10-27 01:31:58,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:58,216 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2020-10-27 01:31:58,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 01:31:58,216 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2020-10-27 01:31:58,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-27 01:31:58,216 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:58,217 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:58,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 01:31:58,217 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:58,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:58,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1889806181, now seen corresponding path program 16 times [2020-10-27 01:31:58,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:58,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [296206855] [2020-10-27 01:31:58,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:58,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:58,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:58,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:59,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:59,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 01:31:59,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:31:59,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1644 [2020-10-27 01:31:59,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:59,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 01:31:59,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:59,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 01:31:59,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:00,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:32:00,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:00,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:00,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:00,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:32:00,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:00,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:32:00,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:00,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:32:00,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:32:00,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:32:00,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:00,286 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:32:00,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [296206855] [2020-10-27 01:32:00,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:32:00,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 01:32:00,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080726289] [2020-10-27 01:32:00,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 01:32:00,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:32:00,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 01:32:00,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:32:00,291 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 20 states. [2020-10-27 01:32:01,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:32:01,745 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2020-10-27 01:32:01,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 01:32:01,748 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 44 [2020-10-27 01:32:01,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:32:01,749 INFO L225 Difference]: With dead ends: 54 [2020-10-27 01:32:01,749 INFO L226 Difference]: Without dead ends: 48 [2020-10-27 01:32:01,750 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=153, Invalid=1179, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 01:32:01,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-27 01:32:01,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-10-27 01:32:01,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-27 01:32:01,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-10-27 01:32:01,758 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2020-10-27 01:32:01,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:32:01,759 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-10-27 01:32:01,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 01:32:01,759 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-10-27 01:32:01,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 01:32:01,759 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:32:01,759 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:32:01,760 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 01:32:01,760 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:32:01,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:32:01,760 INFO L82 PathProgramCache]: Analyzing trace with hash 383291488, now seen corresponding path program 17 times [2020-10-27 01:32:01,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:32:01,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1939765866] [2020-10-27 01:32:01,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:32:01,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:01,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:02,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:02,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:03,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:03,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 01:32:03,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:32:03,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1508 [2020-10-27 01:32:03,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:03,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 01:32:03,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:32:03,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 01:32:03,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:03,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:32:03,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:03,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:03,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:03,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:32:03,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:03,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:32:03,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:03,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:32:03,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:32:03,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:32:03,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:03,766 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:32:03,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1939765866] [2020-10-27 01:32:03,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:32:03,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 01:32:03,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316562128] [2020-10-27 01:32:03,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 01:32:03,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:32:03,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 01:32:03,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:32:03,769 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 21 states. [2020-10-27 01:32:05,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:32:05,299 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2020-10-27 01:32:05,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 01:32:05,302 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 46 [2020-10-27 01:32:05,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:32:05,302 INFO L225 Difference]: With dead ends: 56 [2020-10-27 01:32:05,303 INFO L226 Difference]: Without dead ends: 50 [2020-10-27 01:32:05,304 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=162, Invalid=1320, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 01:32:05,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-27 01:32:05,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-10-27 01:32:05,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-27 01:32:05,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2020-10-27 01:32:05,328 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2020-10-27 01:32:05,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:32:05,328 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2020-10-27 01:32:05,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 01:32:05,328 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2020-10-27 01:32:05,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 01:32:05,329 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:32:05,331 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:32:05,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 01:32:05,331 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:32:05,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:32:05,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1308202267, now seen corresponding path program 18 times [2020-10-27 01:32:05,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:32:05,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1328671666] [2020-10-27 01:32:05,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:32:05,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:05,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:05,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:06,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:06,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 01:32:06,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:32:06,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1376 [2020-10-27 01:32:06,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:06,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 01:32:06,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:32:06,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 01:32:06,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:07,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:32:07,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:07,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:07,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:07,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:32:07,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:07,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:32:07,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:07,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:32:07,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:32:07,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:32:07,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:07,171 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:32:07,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1328671666] [2020-10-27 01:32:07,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:32:07,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 01:32:07,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571179751] [2020-10-27 01:32:07,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 01:32:07,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:32:07,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 01:32:07,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:32:07,173 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 22 states. [2020-10-27 01:32:08,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:32:08,817 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2020-10-27 01:32:08,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 01:32:08,818 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 48 [2020-10-27 01:32:08,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:32:08,819 INFO L225 Difference]: With dead ends: 58 [2020-10-27 01:32:08,819 INFO L226 Difference]: Without dead ends: 52 [2020-10-27 01:32:08,820 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=171, Invalid=1469, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 01:32:08,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-27 01:32:08,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-10-27 01:32:08,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-27 01:32:08,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2020-10-27 01:32:08,829 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2020-10-27 01:32:08,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:32:08,829 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2020-10-27 01:32:08,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 01:32:08,829 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2020-10-27 01:32:08,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 01:32:08,830 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:32:08,830 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:32:08,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 01:32:08,830 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:32:08,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:32:08,831 INFO L82 PathProgramCache]: Analyzing trace with hash 958904362, now seen corresponding path program 19 times [2020-10-27 01:32:08,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:32:08,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [757516914] [2020-10-27 01:32:08,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:32:08,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:08,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:09,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:09,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:10,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:10,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 01:32:10,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:32:10,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1236 [2020-10-27 01:32:10,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:10,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 01:32:10,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:32:10,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 01:32:10,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:10,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:32:10,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:10,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:10,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:10,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:32:10,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:10,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:32:10,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:10,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:32:10,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:32:10,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:32:10,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:10,357 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-27 01:32:10,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [757516914] [2020-10-27 01:32:10,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:32:10,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:32:10,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118872198] [2020-10-27 01:32:10,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:32:10,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:32:10,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:32:10,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:32:10,360 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 9 states. [2020-10-27 01:32:10,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:32:10,712 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2020-10-27 01:32:10,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:32:10,713 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 50 [2020-10-27 01:32:10,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:32:10,714 INFO L225 Difference]: With dead ends: 59 [2020-10-27 01:32:10,714 INFO L226 Difference]: Without dead ends: 53 [2020-10-27 01:32:10,714 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 11 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:32:10,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-27 01:32:10,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-27 01:32:10,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-27 01:32:10,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2020-10-27 01:32:10,724 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2020-10-27 01:32:10,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:32:10,725 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2020-10-27 01:32:10,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:32:10,725 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2020-10-27 01:32:10,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 01:32:10,725 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:32:10,725 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:32:10,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 01:32:10,726 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:32:10,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:32:10,726 INFO L82 PathProgramCache]: Analyzing trace with hash 2099955759, now seen corresponding path program 20 times [2020-10-27 01:32:10,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:32:10,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1451750417] [2020-10-27 01:32:10,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:32:10,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:10,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:10,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:13,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:13,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 01:32:13,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:32:13,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2366 [2020-10-27 01:32:13,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:13,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 01:32:13,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:32:13,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 01:32:13,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:13,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:32:13,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:13,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:13,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:13,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:32:13,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:13,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:32:13,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:13,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:32:13,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:32:13,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:32:13,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:13,665 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:32:13,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1451750417] [2020-10-27 01:32:13,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:32:13,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 01:32:13,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415002269] [2020-10-27 01:32:13,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 01:32:13,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:32:13,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 01:32:13,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:32:13,668 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 24 states. [2020-10-27 01:32:15,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:32:15,340 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2020-10-27 01:32:15,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 01:32:15,341 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 52 [2020-10-27 01:32:15,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:32:15,342 INFO L225 Difference]: With dead ends: 64 [2020-10-27 01:32:15,342 INFO L226 Difference]: Without dead ends: 58 [2020-10-27 01:32:15,343 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=189, Invalid=1791, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 01:32:15,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-27 01:32:15,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-10-27 01:32:15,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-27 01:32:15,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2020-10-27 01:32:15,352 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 52 [2020-10-27 01:32:15,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:32:15,352 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2020-10-27 01:32:15,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 01:32:15,352 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2020-10-27 01:32:15,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 01:32:15,353 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:32:15,353 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:32:15,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 01:32:15,354 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:32:15,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:32:15,358 INFO L82 PathProgramCache]: Analyzing trace with hash 954953849, now seen corresponding path program 21 times [2020-10-27 01:32:15,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:32:15,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1037855295] [2020-10-27 01:32:15,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:32:15,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:15,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:15,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:16,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:16,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 01:32:16,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:32:16,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1595 [2020-10-27 01:32:16,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:16,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 01:32:16,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:32:16,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 01:32:16,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:17,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:32:17,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:17,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:17,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:17,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:32:17,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:17,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:32:17,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:17,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:32:17,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:32:17,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:32:17,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:17,754 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:32:17,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1037855295] [2020-10-27 01:32:17,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:32:17,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 01:32:17,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498692054] [2020-10-27 01:32:17,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 01:32:17,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:32:17,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 01:32:17,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2020-10-27 01:32:17,757 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 26 states. [2020-10-27 01:32:19,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:32:19,954 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2020-10-27 01:32:19,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 01:32:19,955 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 56 [2020-10-27 01:32:19,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:32:19,956 INFO L225 Difference]: With dead ends: 68 [2020-10-27 01:32:19,956 INFO L226 Difference]: Without dead ends: 62 [2020-10-27 01:32:19,957 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=207, Invalid=2145, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 01:32:19,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-27 01:32:19,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-10-27 01:32:19,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-27 01:32:19,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2020-10-27 01:32:19,966 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 56 [2020-10-27 01:32:19,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:32:19,966 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2020-10-27 01:32:19,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 01:32:19,967 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2020-10-27 01:32:19,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 01:32:19,967 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:32:19,968 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:32:19,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 01:32:19,968 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:32:19,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:32:19,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1479205827, now seen corresponding path program 22 times [2020-10-27 01:32:19,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:32:19,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [100538091] [2020-10-27 01:32:19,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:32:19,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:19,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:20,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:21,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:21,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 01:32:21,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:32:21,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1689 [2020-10-27 01:32:21,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:21,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 01:32:21,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:32:21,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 01:32:21,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:22,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:32:22,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:22,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:22,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:22,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:32:22,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:22,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:32:22,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:22,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:32:22,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:32:22,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:32:22,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:22,560 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:32:22,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [100538091] [2020-10-27 01:32:22,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:32:22,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 01:32:22,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174320621] [2020-10-27 01:32:22,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 01:32:22,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:32:22,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 01:32:22,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2020-10-27 01:32:22,564 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 28 states. [2020-10-27 01:32:25,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:32:25,102 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2020-10-27 01:32:25,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 01:32:25,103 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 60 [2020-10-27 01:32:25,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:32:25,104 INFO L225 Difference]: With dead ends: 72 [2020-10-27 01:32:25,104 INFO L226 Difference]: Without dead ends: 66 [2020-10-27 01:32:25,106 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=225, Invalid=2531, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 01:32:25,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-27 01:32:25,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-10-27 01:32:25,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-27 01:32:25,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2020-10-27 01:32:25,114 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 60 [2020-10-27 01:32:25,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:32:25,115 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2020-10-27 01:32:25,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 01:32:25,115 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2020-10-27 01:32:25,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-27 01:32:25,115 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:32:25,115 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:32:25,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 01:32:25,116 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:32:25,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:32:25,116 INFO L82 PathProgramCache]: Analyzing trace with hash 411804173, now seen corresponding path program 23 times [2020-10-27 01:32:25,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:32:25,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1419787176] [2020-10-27 01:32:25,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:32:25,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:25,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:25,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:26,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:26,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 01:32:26,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:32:26,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1564 [2020-10-27 01:32:26,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:26,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 01:32:26,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:32:26,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 01:32:26,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:27,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:32:27,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:27,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:27,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:27,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:32:27,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:27,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:32:27,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:27,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:32:27,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:32:27,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:32:27,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:27,480 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:32:27,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1419787176] [2020-10-27 01:32:27,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:32:27,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 01:32:27,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82563904] [2020-10-27 01:32:27,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 01:32:27,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:32:27,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 01:32:27,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2020-10-27 01:32:27,483 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 30 states. [2020-10-27 01:32:30,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:32:30,350 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2020-10-27 01:32:30,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 01:32:30,351 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 64 [2020-10-27 01:32:30,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:32:30,352 INFO L225 Difference]: With dead ends: 76 [2020-10-27 01:32:30,352 INFO L226 Difference]: Without dead ends: 70 [2020-10-27 01:32:30,354 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=243, Invalid=2949, Unknown=0, NotChecked=0, Total=3192 [2020-10-27 01:32:30,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-27 01:32:30,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-10-27 01:32:30,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-27 01:32:30,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2020-10-27 01:32:30,364 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 64 [2020-10-27 01:32:30,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:32:30,364 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2020-10-27 01:32:30,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 01:32:30,364 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2020-10-27 01:32:30,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 01:32:30,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:32:30,365 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:32:30,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 01:32:30,366 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:32:30,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:32:30,366 INFO L82 PathProgramCache]: Analyzing trace with hash 577776471, now seen corresponding path program 24 times [2020-10-27 01:32:30,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:32:30,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1221219699] [2020-10-27 01:32:30,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:32:30,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:30,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:31,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:32,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:32,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 01:32:32,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:32:32,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2106 [2020-10-27 01:32:32,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:32,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 01:32:32,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:32:32,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-27 01:32:32,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:33,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:32:33,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:33,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:33,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:33,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:32:33,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:33,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:32:33,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:33,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:32:33,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:32:33,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:32:33,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:33,450 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:32:33,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1221219699] [2020-10-27 01:32:33,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:32:33,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 01:32:33,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956474866] [2020-10-27 01:32:33,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 01:32:33,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:32:33,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 01:32:33,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2020-10-27 01:32:33,453 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 32 states. [2020-10-27 01:32:36,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:32:36,754 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2020-10-27 01:32:36,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 01:32:36,755 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 68 [2020-10-27 01:32:36,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:32:36,756 INFO L225 Difference]: With dead ends: 80 [2020-10-27 01:32:36,756 INFO L226 Difference]: Without dead ends: 74 [2020-10-27 01:32:36,758 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=261, Invalid=3399, Unknown=0, NotChecked=0, Total=3660 [2020-10-27 01:32:36,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-27 01:32:36,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-10-27 01:32:36,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-27 01:32:36,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2020-10-27 01:32:36,765 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 68 [2020-10-27 01:32:36,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:32:36,765 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2020-10-27 01:32:36,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 01:32:36,765 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2020-10-27 01:32:36,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 01:32:36,766 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:32:36,766 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:32:36,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 01:32:36,766 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:32:36,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:32:36,767 INFO L82 PathProgramCache]: Analyzing trace with hash 687538081, now seen corresponding path program 25 times [2020-10-27 01:32:36,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:32:36,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1594539327] [2020-10-27 01:32:36,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:32:36,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:36,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:37,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:39,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:39,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 01:32:39,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:32:39,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2852 [2020-10-27 01:32:39,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:39,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 01:32:39,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:32:39,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 01:32:39,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:40,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:32:40,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:40,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:40,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:40,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:32:40,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:40,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:32:40,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:40,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:32:40,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:32:40,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:32:40,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:40,792 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:32:40,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1594539327] [2020-10-27 01:32:40,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:32:40,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-27 01:32:40,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350773561] [2020-10-27 01:32:40,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-27 01:32:40,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:32:40,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-27 01:32:40,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1027, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 01:32:40,795 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 34 states. [2020-10-27 01:32:44,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:32:44,613 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2020-10-27 01:32:44,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 01:32:44,616 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 72 [2020-10-27 01:32:44,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:32:44,617 INFO L225 Difference]: With dead ends: 84 [2020-10-27 01:32:44,618 INFO L226 Difference]: Without dead ends: 78 [2020-10-27 01:32:44,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=279, Invalid=3881, Unknown=0, NotChecked=0, Total=4160 [2020-10-27 01:32:44,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-27 01:32:44,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-10-27 01:32:44,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-27 01:32:44,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2020-10-27 01:32:44,629 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 72 [2020-10-27 01:32:44,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:32:44,630 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2020-10-27 01:32:44,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-27 01:32:44,630 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2020-10-27 01:32:44,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-27 01:32:44,630 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:32:44,631 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:32:44,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 01:32:44,631 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:32:44,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:32:44,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1978753301, now seen corresponding path program 26 times [2020-10-27 01:32:44,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:32:44,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [808833194] [2020-10-27 01:32:44,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:32:44,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:44,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:44,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:47,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:47,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-27 01:32:47,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:32:47,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2646 [2020-10-27 01:32:47,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:47,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-27 01:32:47,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:32:47,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 01:32:47,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:48,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:32:48,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:48,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:48,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:48,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:32:48,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:48,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:32:48,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:48,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:32:48,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:32:48,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:32:48,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:48,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:32:48,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [808833194] [2020-10-27 01:32:48,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:32:48,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-27 01:32:48,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469109072] [2020-10-27 01:32:48,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-27 01:32:48,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:32:48,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-27 01:32:48,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1159, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 01:32:48,516 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 36 states. [2020-10-27 01:32:52,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:32:52,753 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2020-10-27 01:32:52,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 01:32:52,754 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 76 [2020-10-27 01:32:52,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:32:52,755 INFO L225 Difference]: With dead ends: 88 [2020-10-27 01:32:52,756 INFO L226 Difference]: Without dead ends: 82 [2020-10-27 01:32:52,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=297, Invalid=4395, Unknown=0, NotChecked=0, Total=4692 [2020-10-27 01:32:52,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-27 01:32:52,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-10-27 01:32:52,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-27 01:32:52,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2020-10-27 01:32:52,768 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 76 [2020-10-27 01:32:52,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:32:52,768 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2020-10-27 01:32:52,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-27 01:32:52,768 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2020-10-27 01:32:52,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-27 01:32:52,769 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:32:52,769 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:32:52,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 01:32:52,770 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:32:52,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:32:52,770 INFO L82 PathProgramCache]: Analyzing trace with hash -296908491, now seen corresponding path program 27 times [2020-10-27 01:32:52,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:32:52,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1423854210] [2020-10-27 01:32:52,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:32:52,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:52,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:53,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:56,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:56,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-27 01:32:56,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:32:56,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3225 [2020-10-27 01:32:56,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:56,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-27 01:32:56,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:32:56,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 01:32:56,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:57,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:32:57,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:57,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:57,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:57,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:32:57,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:57,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:32:57,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:57,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:32:57,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:32:57,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:32:57,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:57,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:32:57,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1423854210] [2020-10-27 01:32:57,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:32:57,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-27 01:32:57,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842906404] [2020-10-27 01:32:57,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-27 01:32:57,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:32:57,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-27 01:32:57,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1299, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 01:32:57,445 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 38 states. [2020-10-27 01:33:02,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:33:02,167 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2020-10-27 01:33:02,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-27 01:33:02,168 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 80 [2020-10-27 01:33:02,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:33:02,169 INFO L225 Difference]: With dead ends: 92 [2020-10-27 01:33:02,169 INFO L226 Difference]: Without dead ends: 86 [2020-10-27 01:33:02,172 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=315, Invalid=4941, Unknown=0, NotChecked=0, Total=5256 [2020-10-27 01:33:02,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-27 01:33:02,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-10-27 01:33:02,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-27 01:33:02,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2020-10-27 01:33:02,187 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 80 [2020-10-27 01:33:02,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:33:02,187 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2020-10-27 01:33:02,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-27 01:33:02,187 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2020-10-27 01:33:02,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-27 01:33:02,188 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:33:02,188 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:33:02,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 01:33:02,188 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:33:02,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:33:02,189 INFO L82 PathProgramCache]: Analyzing trace with hash -384156033, now seen corresponding path program 28 times [2020-10-27 01:33:02,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:33:02,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1627263058] [2020-10-27 01:33:02,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:33:02,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:02,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:02,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:05,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:05,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-27 01:33:05,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:33:05,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3685 [2020-10-27 01:33:05,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:05,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-27 01:33:05,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:33:05,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 01:33:05,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:07,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:33:07,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:07,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:07,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:07,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:33:07,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:07,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:33:07,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:07,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:33:07,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:33:07,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:33:07,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:07,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:33:07,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1627263058] [2020-10-27 01:33:07,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:33:07,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-27 01:33:07,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857467061] [2020-10-27 01:33:07,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-27 01:33:07,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:33:07,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-27 01:33:07,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1447, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 01:33:07,422 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 40 states. [2020-10-27 01:33:12,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:33:12,551 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2020-10-27 01:33:12,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-27 01:33:12,552 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 84 [2020-10-27 01:33:12,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:33:12,553 INFO L225 Difference]: With dead ends: 96 [2020-10-27 01:33:12,554 INFO L226 Difference]: Without dead ends: 90 [2020-10-27 01:33:12,555 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=333, Invalid=5519, Unknown=0, NotChecked=0, Total=5852 [2020-10-27 01:33:12,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-27 01:33:12,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-10-27 01:33:12,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-27 01:33:12,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2020-10-27 01:33:12,564 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 84 [2020-10-27 01:33:12,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:33:12,565 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2020-10-27 01:33:12,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-27 01:33:12,565 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2020-10-27 01:33:12,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-27 01:33:12,566 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:33:12,566 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:33:12,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 01:33:12,566 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:33:12,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:33:12,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1734918455, now seen corresponding path program 29 times [2020-10-27 01:33:12,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:33:12,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1998713553] [2020-10-27 01:33:12,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:33:12,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:12,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:12,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:17,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:17,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-27 01:33:17,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:33:17,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4955 [2020-10-27 01:33:17,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:17,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-27 01:33:17,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:33:17,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-27 01:33:17,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:19,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:33:19,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:19,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:19,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:19,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:33:19,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:19,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:33:19,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:19,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:33:19,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:33:19,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:33:19,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:19,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:33:19,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1998713553] [2020-10-27 01:33:19,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:33:19,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-27 01:33:19,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787831430] [2020-10-27 01:33:19,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-27 01:33:19,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:33:19,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-27 01:33:19,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1603, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 01:33:19,204 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 42 states. [2020-10-27 01:33:24,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:33:24,737 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2020-10-27 01:33:24,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-27 01:33:24,738 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 88 [2020-10-27 01:33:24,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:33:24,739 INFO L225 Difference]: With dead ends: 100 [2020-10-27 01:33:24,740 INFO L226 Difference]: Without dead ends: 94 [2020-10-27 01:33:24,742 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=351, Invalid=6129, Unknown=0, NotChecked=0, Total=6480 [2020-10-27 01:33:24,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-27 01:33:24,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2020-10-27 01:33:24,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-27 01:33:24,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2020-10-27 01:33:24,754 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 88 [2020-10-27 01:33:24,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:33:24,754 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2020-10-27 01:33:24,754 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-27 01:33:24,755 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2020-10-27 01:33:24,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-27 01:33:24,755 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:33:24,756 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:33:24,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 01:33:24,756 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:33:24,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:33:24,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1168574995, now seen corresponding path program 30 times [2020-10-27 01:33:24,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:33:24,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [302505811] [2020-10-27 01:33:24,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:33:24,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:24,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:25,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:29,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:29,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-27 01:33:29,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:33:29,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-27 01:33:29,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:29,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-27 01:33:29,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:33:29,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 01:33:29,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:31,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:33:31,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:31,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:31,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:31,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:33:31,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:31,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:33:31,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:31,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:33:31,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:33:31,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:33:31,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:31,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:33:31,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [302505811] [2020-10-27 01:33:31,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:33:31,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-27 01:33:31,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006888749] [2020-10-27 01:33:31,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-27 01:33:31,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:33:31,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-27 01:33:31,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1767, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 01:33:31,564 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 44 states. [2020-10-27 01:33:37,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:33:37,484 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2020-10-27 01:33:37,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-27 01:33:37,484 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 92 [2020-10-27 01:33:37,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:33:37,486 INFO L225 Difference]: With dead ends: 104 [2020-10-27 01:33:37,486 INFO L226 Difference]: Without dead ends: 98 [2020-10-27 01:33:37,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=369, Invalid=6771, Unknown=0, NotChecked=0, Total=7140 [2020-10-27 01:33:37,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-27 01:33:37,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-10-27 01:33:37,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-27 01:33:37,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2020-10-27 01:33:37,499 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 92 [2020-10-27 01:33:37,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:33:37,499 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2020-10-27 01:33:37,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-27 01:33:37,499 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2020-10-27 01:33:37,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-27 01:33:37,500 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:33:37,500 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:33:37,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 01:33:37,501 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:33:37,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:33:37,501 INFO L82 PathProgramCache]: Analyzing trace with hash 65806429, now seen corresponding path program 31 times [2020-10-27 01:33:37,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:33:37,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [904828650] [2020-10-27 01:33:37,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:33:37,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:37,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:37,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:42,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:42,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-27 01:33:42,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:33:42,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-27 01:33:42,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:42,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-27 01:33:42,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:33:42,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-27 01:33:42,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:44,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:33:44,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:44,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:44,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:44,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:33:44,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:44,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:33:44,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:44,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:33:44,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:33:44,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:33:44,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:44,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:33:44,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [904828650] [2020-10-27 01:33:44,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:33:44,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-27 01:33:44,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969136659] [2020-10-27 01:33:44,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-27 01:33:44,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:33:44,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-27 01:33:44,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1939, Unknown=0, NotChecked=0, Total=2070 [2020-10-27 01:33:44,392 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 46 states. [2020-10-27 01:33:50,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:33:50,795 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2020-10-27 01:33:50,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-27 01:33:50,796 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 96 [2020-10-27 01:33:50,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:33:50,798 INFO L225 Difference]: With dead ends: 108 [2020-10-27 01:33:50,798 INFO L226 Difference]: Without dead ends: 102 [2020-10-27 01:33:50,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=387, Invalid=7445, Unknown=0, NotChecked=0, Total=7832 [2020-10-27 01:33:50,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-27 01:33:50,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2020-10-27 01:33:50,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-27 01:33:50,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2020-10-27 01:33:50,811 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 96 [2020-10-27 01:33:50,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:33:50,812 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2020-10-27 01:33:50,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-27 01:33:50,812 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2020-10-27 01:33:50,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-27 01:33:50,813 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:33:50,813 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:33:50,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 01:33:50,813 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:33:50,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:33:50,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1372127655, now seen corresponding path program 32 times [2020-10-27 01:33:50,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:33:50,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1683208202] [2020-10-27 01:33:50,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:33:50,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:50,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:52,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:55,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:55,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-27 01:33:55,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:33:55,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 01:33:55,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:55,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-27 01:33:55,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:33:55,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-27 01:33:55,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:57,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:33:57,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:57,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:57,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:57,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:33:57,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:57,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:33:57,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:57,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:33:57,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:33:57,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:33:57,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:57,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:33:57,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1683208202] [2020-10-27 01:33:57,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:33:57,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-27 01:33:57,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64669225] [2020-10-27 01:33:57,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-27 01:33:57,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:33:57,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-27 01:33:57,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=2119, Unknown=0, NotChecked=0, Total=2256 [2020-10-27 01:33:57,829 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 48 states. [2020-10-27 01:34:04,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:04,774 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2020-10-27 01:34:04,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-27 01:34:04,774 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 100 [2020-10-27 01:34:04,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:04,776 INFO L225 Difference]: With dead ends: 112 [2020-10-27 01:34:04,776 INFO L226 Difference]: Without dead ends: 106 [2020-10-27 01:34:04,778 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=405, Invalid=8151, Unknown=0, NotChecked=0, Total=8556 [2020-10-27 01:34:04,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-27 01:34:04,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2020-10-27 01:34:04,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-27 01:34:04,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2020-10-27 01:34:04,790 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 100 [2020-10-27 01:34:04,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:04,791 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2020-10-27 01:34:04,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-27 01:34:04,791 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2020-10-27 01:34:04,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-27 01:34:04,792 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:04,792 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:04,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 01:34:04,792 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:04,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:04,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1201656335, now seen corresponding path program 33 times [2020-10-27 01:34:04,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:04,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [810385829] [2020-10-27 01:34:04,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:04,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:04,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:06,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:09,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:09,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-27 01:34:09,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:34:09,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-27 01:34:09,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:09,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-27 01:34:09,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:09,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-27 01:34:09,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:12,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:12,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:12,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:12,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:12,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:12,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:12,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:34:12,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:12,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:12,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:12,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:12,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:12,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:12,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [810385829] [2020-10-27 01:34:12,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:12,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-27 01:34:12,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542694956] [2020-10-27 01:34:12,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-27 01:34:12,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:12,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-27 01:34:12,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2307, Unknown=0, NotChecked=0, Total=2450 [2020-10-27 01:34:12,081 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 50 states. [2020-10-27 01:34:19,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:19,564 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2020-10-27 01:34:19,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-27 01:34:19,565 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 104 [2020-10-27 01:34:19,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:19,566 INFO L225 Difference]: With dead ends: 116 [2020-10-27 01:34:19,567 INFO L226 Difference]: Without dead ends: 110 [2020-10-27 01:34:19,568 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=423, Invalid=8889, Unknown=0, NotChecked=0, Total=9312 [2020-10-27 01:34:19,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-27 01:34:19,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2020-10-27 01:34:19,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-27 01:34:19,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2020-10-27 01:34:19,581 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 104 [2020-10-27 01:34:19,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:19,581 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2020-10-27 01:34:19,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-27 01:34:19,581 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2020-10-27 01:34:19,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-27 01:34:19,582 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:19,582 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:19,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 01:34:19,582 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:19,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:19,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1804870971, now seen corresponding path program 34 times [2020-10-27 01:34:19,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:19,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1725365154] [2020-10-27 01:34:19,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:19,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:19,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:20,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:24,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:24,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-27 01:34:24,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:34:24,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 01:34:24,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:24,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-27 01:34:24,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:24,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-27 01:34:24,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:26,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:26,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:26,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:26,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:26,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:26,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:26,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:34:26,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:26,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:26,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:26,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:26,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:27,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:27,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1725365154] [2020-10-27 01:34:27,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:27,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-27 01:34:27,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771045939] [2020-10-27 01:34:27,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-27 01:34:27,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:27,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-27 01:34:27,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=2503, Unknown=0, NotChecked=0, Total=2652 [2020-10-27 01:34:27,004 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 52 states. [2020-10-27 01:34:35,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:35,134 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2020-10-27 01:34:35,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-27 01:34:35,135 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 108 [2020-10-27 01:34:35,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:35,136 INFO L225 Difference]: With dead ends: 120 [2020-10-27 01:34:35,136 INFO L226 Difference]: Without dead ends: 114 [2020-10-27 01:34:35,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=441, Invalid=9659, Unknown=0, NotChecked=0, Total=10100 [2020-10-27 01:34:35,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-27 01:34:35,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2020-10-27 01:34:35,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-27 01:34:35,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2020-10-27 01:34:35,154 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 108 [2020-10-27 01:34:35,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:35,154 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2020-10-27 01:34:35,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-27 01:34:35,154 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2020-10-27 01:34:35,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-27 01:34:35,155 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:35,155 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:35,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 01:34:35,156 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:35,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:35,156 INFO L82 PathProgramCache]: Analyzing trace with hash -368613499, now seen corresponding path program 35 times [2020-10-27 01:34:35,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:35,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1478610594] [2020-10-27 01:34:35,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:35,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:35,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:36,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:40,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:40,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-27 01:34:40,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:34:40,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-27 01:34:40,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:40,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-27 01:34:40,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:40,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-27 01:34:40,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:42,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:42,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:42,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:42,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:42,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:42,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:42,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:34:42,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:42,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:42,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:42,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:42,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:42,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:42,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1478610594] [2020-10-27 01:34:42,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:42,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-27 01:34:42,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909584295] [2020-10-27 01:34:42,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-27 01:34:42,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:42,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-27 01:34:42,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=2707, Unknown=0, NotChecked=0, Total=2862 [2020-10-27 01:34:42,741 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 54 states. [2020-10-27 01:34:51,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:51,447 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2020-10-27 01:34:51,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-27 01:34:51,448 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 112 [2020-10-27 01:34:51,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:51,450 INFO L225 Difference]: With dead ends: 124 [2020-10-27 01:34:51,450 INFO L226 Difference]: Without dead ends: 118 [2020-10-27 01:34:51,451 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1276 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=459, Invalid=10461, Unknown=0, NotChecked=0, Total=10920 [2020-10-27 01:34:51,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-27 01:34:51,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2020-10-27 01:34:51,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-27 01:34:51,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2020-10-27 01:34:51,462 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 112 [2020-10-27 01:34:51,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:51,462 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2020-10-27 01:34:51,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-27 01:34:51,462 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2020-10-27 01:34:51,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-27 01:34:51,463 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:51,463 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:51,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-27 01:34:51,463 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:51,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:51,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1659079473, now seen corresponding path program 36 times [2020-10-27 01:34:51,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:51,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1072901056] [2020-10-27 01:34:51,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:51,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:51,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:51,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:56,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:56,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-27 01:34:56,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:34:56,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5080 [2020-10-27 01:34:56,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:56,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-27 01:34:56,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:56,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-27 01:34:56,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:59,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:59,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:59,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:59,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:59,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:59,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:59,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:34:59,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:59,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:59,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:59,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:59,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:59,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:59,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1072901056] [2020-10-27 01:34:59,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:59,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-27 01:34:59,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96415714] [2020-10-27 01:34:59,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-27 01:34:59,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:59,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-27 01:34:59,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=2919, Unknown=0, NotChecked=0, Total=3080 [2020-10-27 01:34:59,280 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 56 states. [2020-10-27 01:35:08,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:35:08,728 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2020-10-27 01:35:08,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-27 01:35:08,729 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 116 [2020-10-27 01:35:08,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:35:08,731 INFO L225 Difference]: With dead ends: 128 [2020-10-27 01:35:08,731 INFO L226 Difference]: Without dead ends: 122 [2020-10-27 01:35:08,732 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1379 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=477, Invalid=11295, Unknown=0, NotChecked=0, Total=11772 [2020-10-27 01:35:08,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-27 01:35:08,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2020-10-27 01:35:08,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-27 01:35:08,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2020-10-27 01:35:08,745 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 116 [2020-10-27 01:35:08,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:35:08,746 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2020-10-27 01:35:08,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-27 01:35:08,746 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2020-10-27 01:35:08,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-27 01:35:08,747 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:35:08,747 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:35:08,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-27 01:35:08,747 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:35:08,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:35:08,748 INFO L82 PathProgramCache]: Analyzing trace with hash 2029374745, now seen corresponding path program 37 times [2020-10-27 01:35:08,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:35:08,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [581336833] [2020-10-27 01:35:08,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:35:08,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:08,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:09,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking...