/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/nested_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:32:41,204 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:32:41,209 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:32:41,262 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:32:41,263 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:32:41,269 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:32:41,271 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:32:41,276 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:32:41,281 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:32:41,287 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:32:41,288 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:32:41,290 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:32:41,290 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:32:41,293 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:32:41,297 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:32:41,302 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:32:41,303 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:32:41,308 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:32:41,316 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:32:41,323 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:32:41,326 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:32:41,328 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:32:41,329 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:32:41,330 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:32:41,333 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:32:41,333 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:32:41,334 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:32:41,336 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:32:41,337 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:32:41,338 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:32:41,338 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:32:41,339 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:32:41,340 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:32:41,341 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:32:41,343 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:32:41,343 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:32:41,344 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:32:41,344 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:32:41,344 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:32:41,345 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:32:41,346 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:32:41,353 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 01:32:41,414 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:32:41,414 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:32:41,418 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:32:41,418 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:32:41,418 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:32:41,418 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:32:41,418 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:32:41,419 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:32:41,419 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:32:41,419 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:32:41,420 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:32:41,420 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:32:41,420 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:32:41,421 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:32:41,421 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:32:41,421 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:32:41,421 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:32:41,421 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:32:41,421 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:32:41,422 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:32:41,422 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:32:41,422 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:32:41,422 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:32:41,422 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:32:41,423 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:32:41,423 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:32:41,423 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:32:41,423 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:32:41,423 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:32:41,423 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:32:41,794 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:32:41,822 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:32:41,825 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:32:41,826 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:32:41,827 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:32:41,828 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/nested_1-1.c [2020-10-27 01:32:41,903 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6770868d4/ac0a933253fa4fd39be5a42452a82673/FLAG80225acea [2020-10-27 01:32:42,505 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:32:42,506 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/nested_1-1.c [2020-10-27 01:32:42,513 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6770868d4/ac0a933253fa4fd39be5a42452a82673/FLAG80225acea [2020-10-27 01:32:42,848 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6770868d4/ac0a933253fa4fd39be5a42452a82673 [2020-10-27 01:32:42,858 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:32:42,867 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:32:42,869 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:32:42,869 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:32:42,875 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:32:42,876 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:32:42" (1/1) ... [2020-10-27 01:32:42,881 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55ff82a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:32:42, skipping insertion in model container [2020-10-27 01:32:42,881 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:32:42" (1/1) ... [2020-10-27 01:32:42,890 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:32:42,913 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:32:43,091 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:32:43,107 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:32:43,144 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:32:43,165 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:32:43,166 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:32:43 WrapperNode [2020-10-27 01:32:43,167 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:32:43,169 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:32:43,169 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:32:43,169 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:32:43,184 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:32:43" (1/1) ... [2020-10-27 01:32:43,187 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:32:43" (1/1) ... [2020-10-27 01:32:43,198 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:32:43" (1/1) ... [2020-10-27 01:32:43,198 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:32:43" (1/1) ... [2020-10-27 01:32:43,219 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:32:43" (1/1) ... [2020-10-27 01:32:43,226 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:32:43" (1/1) ... [2020-10-27 01:32:43,229 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:32:43" (1/1) ... [2020-10-27 01:32:43,238 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:32:43,241 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:32:43,241 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:32:43,242 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:32:43,243 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:32:43" (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 01:32:43,320 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:32:43,321 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:32:43,321 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:32:43,321 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 01:32:43,321 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:32:43,321 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:32:43,322 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:32:43,322 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:32:43,322 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:32:43,322 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 01:32:43,322 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:32:43,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:32:43,323 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:32:43,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:32:43,323 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:32:43,324 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:32:43,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:32:43,697 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:32:43,698 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-27 01:32:43,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:32:43 BoogieIcfgContainer [2020-10-27 01:32:43,700 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:32:43,702 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:32:43,702 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:32:43,706 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:32:43,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:32:42" (1/3) ... [2020-10-27 01:32:43,708 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14d4e4ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:32:43, skipping insertion in model container [2020-10-27 01:32:43,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:32:43" (2/3) ... [2020-10-27 01:32:43,709 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14d4e4ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:32:43, skipping insertion in model container [2020-10-27 01:32:43,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:32:43" (3/3) ... [2020-10-27 01:32:43,711 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_1-1.c [2020-10-27 01:32:43,726 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:32:43,734 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:32:43,767 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:32:43,811 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:32:43,811 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:32:43,811 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:32:43,812 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:32:43,812 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:32:43,812 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:32:43,812 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:32:43,812 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:32:43,839 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-10-27 01:32:43,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-27 01:32:43,846 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:32:43,847 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:32:43,847 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:32:43,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:32:43,856 INFO L82 PathProgramCache]: Analyzing trace with hash 2005875033, now seen corresponding path program 1 times [2020-10-27 01:32:43,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:32:43,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1045221639] [2020-10-27 01:32:43,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:32:44,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:44,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:44,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:44,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 01:32:44,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:44,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 136 [2020-10-27 01:32:44,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:44,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:32:44,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:32:44,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:32:44,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 01:32:44,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:32:44,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:44,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:44,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:44,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:32:44,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:44,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 01:32:44,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:44,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:32:44,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:32:44,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:32:44,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:32:44,321 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 01:32:44,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1045221639] [2020-10-27 01:32:44,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:32:44,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 01:32:44,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287816860] [2020-10-27 01:32:44,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 01:32:44,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:32:44,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 01:32:44,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 01:32:44,348 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2020-10-27 01:32:44,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:32:44,441 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2020-10-27 01:32:44,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 01:32:44,443 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-27 01:32:44,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:32:44,451 INFO L225 Difference]: With dead ends: 39 [2020-10-27 01:32:44,451 INFO L226 Difference]: Without dead ends: 15 [2020-10-27 01:32:44,454 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 01:32:44,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-27 01:32:44,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-27 01:32:44,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-27 01:32:44,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-10-27 01:32:44,497 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2020-10-27 01:32:44,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:32:44,497 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-10-27 01:32:44,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 01:32:44,497 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-10-27 01:32:44,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-27 01:32:44,498 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:32:44,498 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:32:44,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:32:44,499 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:32:44,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:32:44,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1519179466, now seen corresponding path program 1 times [2020-10-27 01:32:44,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:32:44,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [201506716] [2020-10-27 01:32:44,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:32:44,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:44,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:44,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:44,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 01:32:44,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:44,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-10-27 01:32:44,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:44,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:32:44,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:32:44,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 01:32:44,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:44,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:32:44,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:44,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:44,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:44,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:32:44,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:44,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 01:32:44,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:44,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:32:44,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:32:44,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:32:44,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:44,785 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 01:32:44,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [201506716] [2020-10-27 01:32:44,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:32:44,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:32:44,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783821739] [2020-10-27 01:32:44,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:32:44,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:32:44,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:32:44,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:32:44,789 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 4 states. [2020-10-27 01:32:44,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:32:44,866 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-10-27 01:32:44,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:32:44,867 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-27 01:32:44,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:32:44,868 INFO L225 Difference]: With dead ends: 24 [2020-10-27 01:32:44,868 INFO L226 Difference]: Without dead ends: 18 [2020-10-27 01:32:44,869 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 01:32:44,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-27 01:32:44,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2020-10-27 01:32:44,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-27 01:32:44,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-10-27 01:32:44,878 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2020-10-27 01:32:44,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:32:44,878 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-10-27 01:32:44,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:32:44,879 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-10-27 01:32:44,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-27 01:32:44,879 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:32:44,880 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:32:44,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:32:44,880 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:32:44,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:32:44,881 INFO L82 PathProgramCache]: Analyzing trace with hash 956003377, now seen corresponding path program 1 times [2020-10-27 01:32:44,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:32:44,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [973397360] [2020-10-27 01:32:44,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:32:44,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:44,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:44,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:45,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:45,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:45,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:45,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 01:32:45,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:32:45,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 664 [2020-10-27 01:32:45,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:45,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:32:45,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:32:45,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:32:45,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:32:45,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:32:45,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:45,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:45,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:45,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:32:45,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:45,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:32:45,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:45,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:32:45,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:32:45,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:32:45,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:45,702 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 01:32:45,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [973397360] [2020-10-27 01:32:45,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:32:45,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:32:45,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657165614] [2020-10-27 01:32:45,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:32:45,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:32:45,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:32:45,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:32:45,705 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 7 states. [2020-10-27 01:32:45,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:32:45,859 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2020-10-27 01:32:45,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:32:45,860 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-10-27 01:32:45,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:32:45,861 INFO L225 Difference]: With dead ends: 27 [2020-10-27 01:32:45,861 INFO L226 Difference]: Without dead ends: 21 [2020-10-27 01:32:45,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:32:45,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-27 01:32:45,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2020-10-27 01:32:45,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-27 01:32:45,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-10-27 01:32:45,870 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 15 [2020-10-27 01:32:45,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:32:45,870 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-10-27 01:32:45,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:32:45,871 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-10-27 01:32:45,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 01:32:45,871 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:32:45,872 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:32:45,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:32:45,872 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:32:45,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:32:45,873 INFO L82 PathProgramCache]: Analyzing trace with hash -480605846, now seen corresponding path program 2 times [2020-10-27 01:32:45,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:32:45,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1261436694] [2020-10-27 01:32:45,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:32:45,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:45,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:45,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:45,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:45,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:46,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:46,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 01:32:46,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:32:46,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 924 [2020-10-27 01:32:46,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:46,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:32:46,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:32:46,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:32:46,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:32:46,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:32:46,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:46,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:46,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:46,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:32:46,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:46,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 01:32:46,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:46,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:32:46,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:32:46,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:32:46,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:46,924 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:32:46,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1261436694] [2020-10-27 01:32:46,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:32:46,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 01:32:46,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783248360] [2020-10-27 01:32:46,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:32:46,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:32:46,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:32:46,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:32:46,927 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 6 states. [2020-10-27 01:32:47,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:32:47,151 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-10-27 01:32:47,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:32:47,155 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-27 01:32:47,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:32:47,156 INFO L225 Difference]: With dead ends: 30 [2020-10-27 01:32:47,157 INFO L226 Difference]: Without dead ends: 24 [2020-10-27 01:32:47,157 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 01:32:47,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-27 01:32:47,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2020-10-27 01:32:47,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-27 01:32:47,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-10-27 01:32:47,165 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 18 [2020-10-27 01:32:47,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:32:47,167 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-10-27 01:32:47,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:32:47,167 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-10-27 01:32:47,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 01:32:47,168 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:32:47,168 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:32:47,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:32:47,169 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:32:47,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:32:47,169 INFO L82 PathProgramCache]: Analyzing trace with hash 843136401, now seen corresponding path program 3 times [2020-10-27 01:32:47,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:32:47,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [628170217] [2020-10-27 01:32:47,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:32:47,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:47,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:47,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:47,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:47,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:47,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:47,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:49,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:49,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 01:32:49,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:32:49,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2037 [2020-10-27 01:32:49,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:49,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:32:49,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:32:49,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 01:32:49,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:49,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:32:49,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:49,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:49,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:49,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:32:49,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:49,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:32:49,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:49,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:32:49,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:32:49,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:32:49,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:49,352 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:32:49,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [628170217] [2020-10-27 01:32:49,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:32:49,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:32:49,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666301561] [2020-10-27 01:32:49,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:32:49,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:32:49,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:32:49,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:32:49,355 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 7 states. [2020-10-27 01:32:49,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:32:49,585 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-10-27 01:32:49,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:32:49,585 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-10-27 01:32:49,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:32:49,586 INFO L225 Difference]: With dead ends: 33 [2020-10-27 01:32:49,586 INFO L226 Difference]: Without dead ends: 27 [2020-10-27 01:32:49,587 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 01:32:49,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-27 01:32:49,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2020-10-27 01:32:49,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-27 01:32:49,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-10-27 01:32:49,595 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 21 [2020-10-27 01:32:49,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:32:49,596 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-10-27 01:32:49,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:32:49,596 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-10-27 01:32:49,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 01:32:49,597 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:32:49,597 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:32:49,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:32:49,597 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:32:49,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:32:49,598 INFO L82 PathProgramCache]: Analyzing trace with hash 58704906, now seen corresponding path program 4 times [2020-10-27 01:32:49,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:32:49,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [617870190] [2020-10-27 01:32:49,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:32:49,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:49,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:49,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:49,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:49,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:49,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:50,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:52,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:52,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 01:32:52,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:32:52,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3341 [2020-10-27 01:32:52,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:52,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:32:52,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:32:52,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:32:52,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:53,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:32:53,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:53,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:53,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:53,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:32:53,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:53,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:32:53,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:53,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:32:53,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:32:53,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:32:53,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-27 01:32:53,096 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:32:53,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [617870190] [2020-10-27 01:32:53,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:32:53,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:32:53,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623477683] [2020-10-27 01:32:53,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:32:53,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:32:53,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:32:53,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:32:53,105 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 8 states. [2020-10-27 01:32:53,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:32:53,401 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2020-10-27 01:32:53,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:32:53,402 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-10-27 01:32:53,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:32:53,403 INFO L225 Difference]: With dead ends: 36 [2020-10-27 01:32:53,403 INFO L226 Difference]: Without dead ends: 30 [2020-10-27 01:32:53,404 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 01:32:53,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-27 01:32:53,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2020-10-27 01:32:53,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-27 01:32:53,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-10-27 01:32:53,412 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 24 [2020-10-27 01:32:53,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:32:53,413 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-10-27 01:32:53,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:32:53,413 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-10-27 01:32:53,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 01:32:53,414 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:32:53,414 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:32:53,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:32:53,414 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:32:53,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:32:53,415 INFO L82 PathProgramCache]: Analyzing trace with hash -22905103, now seen corresponding path program 5 times [2020-10-27 01:32:53,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:32:53,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1155980237] [2020-10-27 01:32:53,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:32:53,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:53,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:53,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:53,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:53,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:53,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:53,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:54,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:54,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:58,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:58,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 01:32:58,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 01:32:58,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 01:32:58,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:58,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:32:58,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:32:58,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 01:32:58,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:58,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:32:58,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:58,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:58,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:58,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:32:58,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:58,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 01:32:58,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:58,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:32:58,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:32:58,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:32:58,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:58,634 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:32:58,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1155980237] [2020-10-27 01:32:58,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:32:58,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:32:58,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117435439] [2020-10-27 01:32:58,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:32:58,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:32:58,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:32:58,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:32:58,638 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 11 states. [2020-10-27 01:32:59,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:32:59,074 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2020-10-27 01:32:59,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:32:59,074 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-10-27 01:32:59,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:32:59,075 INFO L225 Difference]: With dead ends: 39 [2020-10-27 01:32:59,075 INFO L226 Difference]: Without dead ends: 33 [2020-10-27 01:32:59,076 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:32:59,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-27 01:32:59,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2020-10-27 01:32:59,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-27 01:32:59,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2020-10-27 01:32:59,085 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 27 [2020-10-27 01:32:59,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:32:59,086 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2020-10-27 01:32:59,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:32:59,086 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2020-10-27 01:32:59,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:32:59,087 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:32:59,087 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:32:59,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 01:32:59,087 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:32:59,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:32:59,088 INFO L82 PathProgramCache]: Analyzing trace with hash -315193686, now seen corresponding path program 6 times [2020-10-27 01:32:59,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:32:59,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1149555388] [2020-10-27 01:32:59,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:32:59,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:59,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:59,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:59,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:59,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:59,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:59,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:59,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:00,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:04,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:04,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:33:04,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 01:33:04,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 01:33:04,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:04,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:33:04,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:33:04,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 01:33:04,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:04,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:33:04,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:04,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:04,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:04,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:33:04,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:04,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:33:04,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:04,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:33:04,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:33:04,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:33:04,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:04,261 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:33:04,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1149555388] [2020-10-27 01:33:04,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:33:04,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:33:04,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5544196] [2020-10-27 01:33:04,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:33:04,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:33:04,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:33:04,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:33:04,267 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand 10 states. [2020-10-27 01:33:04,661 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-10-27 01:33:04,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:33:04,894 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2020-10-27 01:33:04,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:33:04,895 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-10-27 01:33:04,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:33:04,896 INFO L225 Difference]: With dead ends: 42 [2020-10-27 01:33:04,896 INFO L226 Difference]: Without dead ends: 36 [2020-10-27 01:33:04,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:33:04,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-27 01:33:04,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-10-27 01:33:04,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-27 01:33:04,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2020-10-27 01:33:04,907 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 30 [2020-10-27 01:33:04,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:33:04,907 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2020-10-27 01:33:04,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:33:04,908 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2020-10-27 01:33:04,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:33:04,909 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:33:04,909 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:33:04,909 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 01:33:04,909 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:33:04,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:33:04,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1985660847, now seen corresponding path program 7 times [2020-10-27 01:33:04,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:33:04,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1213286049] [2020-10-27 01:33:04,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:33:04,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:04,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:04,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:04,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:04,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:04,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:04,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:05,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:05,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:08,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:09,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:09,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:09,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:33:09,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 01:33:09,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 01:33:09,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:09,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:33:09,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:33:09,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 01:33:09,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:33:10,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:33:10,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:10,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:10,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:10,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:33:10,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:10,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:33:10,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:10,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:33:10,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:33:10,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:33:10,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:10,102 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:33:10,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1213286049] [2020-10-27 01:33:10,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:33:10,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:33:10,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354493397] [2020-10-27 01:33:10,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:33:10,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:33:10,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:33:10,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:33:10,105 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand 11 states. [2020-10-27 01:33:10,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:33:10,721 INFO L93 Difference]: Finished difference Result 45 states and 54 transitions. [2020-10-27 01:33:10,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:33:10,721 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2020-10-27 01:33:10,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:33:10,723 INFO L225 Difference]: With dead ends: 45 [2020-10-27 01:33:10,723 INFO L226 Difference]: Without dead ends: 39 [2020-10-27 01:33:10,724 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:33:10,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-27 01:33:10,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2020-10-27 01:33:10,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-27 01:33:10,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2020-10-27 01:33:10,745 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 33 [2020-10-27 01:33:10,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:33:10,746 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2020-10-27 01:33:10,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:33:10,746 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2020-10-27 01:33:10,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 01:33:10,748 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:33:10,748 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:33:10,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 01:33:10,748 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:33:10,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:33:10,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1086795446, now seen corresponding path program 8 times [2020-10-27 01:33:10,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:33:10,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [704252923] [2020-10-27 01:33:10,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:33:10,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:10,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:10,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:10,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:10,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:10,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:10,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:10,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:10,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:11,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:15,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:15,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 01:33:15,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 01:33:15,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 01:33:15,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:15,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:33:15,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:33:15,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:33:15,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:15,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:33:15,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:15,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:15,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:15,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:33:15,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:15,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:33:15,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:15,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:33:15,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:33:15,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:33:15,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:15,976 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:33:15,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [704252923] [2020-10-27 01:33:15,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:33:15,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:33:15,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862732749] [2020-10-27 01:33:15,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:33:15,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:33:15,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:33:15,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:33:15,979 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand 12 states. [2020-10-27 01:33:16,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:33:16,689 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2020-10-27 01:33:16,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:33:16,689 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2020-10-27 01:33:16,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:33:16,690 INFO L225 Difference]: With dead ends: 48 [2020-10-27 01:33:16,690 INFO L226 Difference]: Without dead ends: 42 [2020-10-27 01:33:16,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:33:16,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-27 01:33:16,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2020-10-27 01:33:16,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-27 01:33:16,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2020-10-27 01:33:16,702 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 36 [2020-10-27 01:33:16,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:33:16,702 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2020-10-27 01:33:16,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:33:16,702 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2020-10-27 01:33:16,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 01:33:16,703 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:33:16,704 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:33:16,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 01:33:16,704 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:33:16,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:33:16,704 INFO L82 PathProgramCache]: Analyzing trace with hash -2108724815, now seen corresponding path program 9 times [2020-10-27 01:33:16,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:33:16,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1718349750] [2020-10-27 01:33:16,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:33:16,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:16,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:16,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:16,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:16,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:16,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:16,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:16,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:16,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:16,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:17,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:21,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:21,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 01:33:21,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 01:33:21,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 01:33:21,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:21,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:33:21,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:33:21,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 01:33:21,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:21,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:33:21,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:21,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:21,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:21,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:33:21,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:21,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:33:21,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:21,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:33:21,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:33:21,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:33:21,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:21,958 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:33:21,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1718349750] [2020-10-27 01:33:21,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:33:21,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:33:21,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926064934] [2020-10-27 01:33:21,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:33:21,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:33:21,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:33:21,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:33:21,960 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand 13 states. [2020-10-27 01:33:22,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:33:22,807 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2020-10-27 01:33:22,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:33:22,807 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 39 [2020-10-27 01:33:22,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:33:22,808 INFO L225 Difference]: With dead ends: 51 [2020-10-27 01:33:22,808 INFO L226 Difference]: Without dead ends: 45 [2020-10-27 01:33:22,809 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:33:22,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-27 01:33:22,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2020-10-27 01:33:22,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-27 01:33:22,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2020-10-27 01:33:22,822 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 39 [2020-10-27 01:33:22,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:33:22,822 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2020-10-27 01:33:22,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:33:22,822 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2020-10-27 01:33:22,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 01:33:22,823 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:33:22,823 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:33:22,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 01:33:22,824 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:33:22,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:33:22,824 INFO L82 PathProgramCache]: Analyzing trace with hash 616604650, now seen corresponding path program 10 times [2020-10-27 01:33:22,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:33:22,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1074879190] [2020-10-27 01:33:22,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:33:22,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:22,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:22,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:22,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:22,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:22,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:22,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:22,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:22,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:23,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:23,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:23,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:27,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:27,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 01:33:27,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 01:33:27,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 01:33:27,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:27,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:33:27,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:33:27,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 01:33:27,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:28,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:33:28,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:28,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:28,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:28,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:33:28,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:28,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:33:28,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:28,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:33:28,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:33:28,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:33:28,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:28,106 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:33:28,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1074879190] [2020-10-27 01:33:28,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:33:28,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:33:28,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838525958] [2020-10-27 01:33:28,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:33:28,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:33:28,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:33:28,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:33:28,109 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand 14 states. [2020-10-27 01:33:29,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:33:29,014 INFO L93 Difference]: Finished difference Result 54 states and 66 transitions. [2020-10-27 01:33:29,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:33:29,015 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 42 [2020-10-27 01:33:29,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:33:29,016 INFO L225 Difference]: With dead ends: 54 [2020-10-27 01:33:29,016 INFO L226 Difference]: Without dead ends: 48 [2020-10-27 01:33:29,018 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 01:33:29,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-27 01:33:29,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2020-10-27 01:33:29,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-27 01:33:29,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2020-10-27 01:33:29,032 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 42 [2020-10-27 01:33:29,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:33:29,032 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2020-10-27 01:33:29,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:33:29,033 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2020-10-27 01:33:29,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 01:33:29,034 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:33:29,034 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:33:29,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 01:33:29,034 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:33:29,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:33:29,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1155067119, now seen corresponding path program 11 times [2020-10-27 01:33:29,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:33:29,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1912511013] [2020-10-27 01:33:29,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:33:29,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:29,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:29,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:29,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:29,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:29,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:29,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:29,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:29,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:29,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:29,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:30,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:30,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:34,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:34,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 01:33:34,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 01:33:34,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 01:33:34,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:34,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:33:34,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:33:34,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 01:33:34,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:34,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:33:34,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:34,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:34,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:34,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:33:34,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:34,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:33:34,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:34,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:33:34,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:33:34,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:33:34,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:34,337 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:33:34,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1912511013] [2020-10-27 01:33:34,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:33:34,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:33:34,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099067171] [2020-10-27 01:33:34,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:33:34,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:33:34,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:33:34,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:33:34,340 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand 15 states. [2020-10-27 01:33:35,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:33:35,390 INFO L93 Difference]: Finished difference Result 57 states and 70 transitions. [2020-10-27 01:33:35,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:33:35,390 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 45 [2020-10-27 01:33:35,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:33:35,391 INFO L225 Difference]: With dead ends: 57 [2020-10-27 01:33:35,391 INFO L226 Difference]: Without dead ends: 51 [2020-10-27 01:33:35,392 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:33:35,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-27 01:33:35,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2020-10-27 01:33:35,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-27 01:33:35,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2020-10-27 01:33:35,405 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 45 [2020-10-27 01:33:35,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:33:35,406 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2020-10-27 01:33:35,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:33:35,406 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2020-10-27 01:33:35,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 01:33:35,407 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:33:35,407 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:33:35,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 01:33:35,407 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:33:35,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:33:35,408 INFO L82 PathProgramCache]: Analyzing trace with hash -175636854, now seen corresponding path program 12 times [2020-10-27 01:33:35,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:33:35,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1922409901] [2020-10-27 01:33:35,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:33:35,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:35,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:35,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:35,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:35,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:35,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:35,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:35,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:35,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:35,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:35,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:35,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:37,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:40,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:40,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 01:33:40,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 01:33:40,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 01:33:40,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:40,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:33:40,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:33:40,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 01:33:40,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:40,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:33:40,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:40,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:40,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:40,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:33:40,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:40,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:33:40,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:40,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:33:40,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:33:40,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:33:40,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:40,491 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-10-27 01:33:40,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1922409901] [2020-10-27 01:33:40,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:33:40,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:33:40,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365078393] [2020-10-27 01:33:40,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:33:40,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:33:40,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:33:40,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:33:40,493 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand 4 states. [2020-10-27 01:33:40,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:33:40,571 INFO L93 Difference]: Finished difference Result 102 states and 137 transitions. [2020-10-27 01:33:40,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:33:40,571 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-10-27 01:33:40,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:33:40,572 INFO L225 Difference]: With dead ends: 102 [2020-10-27 01:33:40,572 INFO L226 Difference]: Without dead ends: 61 [2020-10-27 01:33:40,573 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 01:33:40,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-27 01:33:40,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-27 01:33:40,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-27 01:33:40,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2020-10-27 01:33:40,592 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 48 [2020-10-27 01:33:40,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:33:40,592 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2020-10-27 01:33:40,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:33:40,593 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2020-10-27 01:33:40,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 01:33:40,594 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:33:40,594 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:33:40,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 01:33:40,594 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:33:40,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:33:40,595 INFO L82 PathProgramCache]: Analyzing trace with hash 2049295358, now seen corresponding path program 1 times [2020-10-27 01:33:40,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:33:40,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [826843039] [2020-10-27 01:33:40,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:33:40,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:40,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:40,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:40,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:40,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:40,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:40,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:40,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:40,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:41,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:45,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:45,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 01:33:45,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 01:33:45,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 01:33:45,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:45,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:33:45,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:33:45,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 01:33:45,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:45,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:33:45,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:45,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:45,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:45,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:33:45,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:45,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:33:45,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:45,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:33:45,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:33:45,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:33:45,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:45,698 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 56 proven. 1 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2020-10-27 01:33:45,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [826843039] [2020-10-27 01:33:45,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:33:45,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 01:33:45,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792024208] [2020-10-27 01:33:45,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:33:45,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:33:45,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:33:45,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:33:45,700 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand 5 states. [2020-10-27 01:33:45,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:33:45,847 INFO L93 Difference]: Finished difference Result 125 states and 160 transitions. [2020-10-27 01:33:45,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:33:45,848 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 60 [2020-10-27 01:33:45,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:33:45,849 INFO L225 Difference]: With dead ends: 125 [2020-10-27 01:33:45,849 INFO L226 Difference]: Without dead ends: 73 [2020-10-27 01:33:45,850 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:33:45,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-27 01:33:45,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-10-27 01:33:45,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-27 01:33:45,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2020-10-27 01:33:45,874 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 60 [2020-10-27 01:33:45,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:33:45,874 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2020-10-27 01:33:45,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:33:45,874 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2020-10-27 01:33:45,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 01:33:45,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:33:45,876 INFO L422 BasicCegarLoop]: trace histogram [24, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:33:45,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 01:33:45,876 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:33:45,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:33:45,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1304051446, now seen corresponding path program 2 times [2020-10-27 01:33:45,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:33:45,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [108579636] [2020-10-27 01:33:45,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:33:45,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:45,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:45,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:45,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:45,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:45,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:46,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:46,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:46,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:48,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:50,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:50,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 01:33:50,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 01:33:50,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-27 01:33:50,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:50,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:33:50,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:33:50,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 01:33:50,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:51,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:33:51,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:51,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:51,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:51,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:33:51,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:51,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:33:51,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:51,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:33:51,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:33:51,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:33:51,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:51,022 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 111 proven. 3 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2020-10-27 01:33:51,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [108579636] [2020-10-27 01:33:51,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:33:51,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 01:33:51,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611905209] [2020-10-27 01:33:51,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:33:51,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:33:51,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:33:51,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:33:51,025 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand 6 states. [2020-10-27 01:33:51,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:33:51,195 INFO L93 Difference]: Finished difference Result 148 states and 183 transitions. [2020-10-27 01:33:51,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:33:51,196 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 72 [2020-10-27 01:33:51,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:33:51,197 INFO L225 Difference]: With dead ends: 148 [2020-10-27 01:33:51,197 INFO L226 Difference]: Without dead ends: 85 [2020-10-27 01:33:51,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 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 01:33:51,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-27 01:33:51,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-10-27 01:33:51,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-27 01:33:51,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 97 transitions. [2020-10-27 01:33:51,225 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 97 transitions. Word has length 72 [2020-10-27 01:33:51,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:33:51,225 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 97 transitions. [2020-10-27 01:33:51,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:33:51,225 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 97 transitions. [2020-10-27 01:33:51,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-27 01:33:51,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:33:51,227 INFO L422 BasicCegarLoop]: trace histogram [36, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:33:51,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 01:33:51,227 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:33:51,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:33:51,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1981679742, now seen corresponding path program 3 times [2020-10-27 01:33:51,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:33:51,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [574775411] [2020-10-27 01:33:51,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:33:51,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:51,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:51,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:51,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:51,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:51,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:51,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:51,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:53,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:56,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:56,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-27 01:33:56,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 01:33:56,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 01:33:56,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:56,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:33:56,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:33:56,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 01:33:56,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:56,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:33:56,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:56,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:56,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:56,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:33:56,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:56,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:33:56,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:56,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:33:56,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:33:56,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:33:56,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:56,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1272 backedges. 188 proven. 6 refuted. 0 times theorem prover too weak. 1078 trivial. 0 not checked. [2020-10-27 01:33:56,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [574775411] [2020-10-27 01:33:56,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:33:56,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:33:56,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578436817] [2020-10-27 01:33:56,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:33:56,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:33:56,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:33:56,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:33:56,388 INFO L87 Difference]: Start difference. First operand 85 states and 97 transitions. Second operand 7 states. [2020-10-27 01:33:56,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:33:56,693 INFO L93 Difference]: Finished difference Result 171 states and 206 transitions. [2020-10-27 01:33:56,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:33:56,694 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 84 [2020-10-27 01:33:56,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:33:56,695 INFO L225 Difference]: With dead ends: 171 [2020-10-27 01:33:56,696 INFO L226 Difference]: Without dead ends: 97 [2020-10-27 01:33:56,697 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 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 01:33:56,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-27 01:33:56,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2020-10-27 01:33:56,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-27 01:33:56,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 109 transitions. [2020-10-27 01:33:56,750 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 109 transitions. Word has length 84 [2020-10-27 01:33:56,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:33:56,750 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 109 transitions. [2020-10-27 01:33:56,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:33:56,750 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 109 transitions. [2020-10-27 01:33:56,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-27 01:33:56,752 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:33:56,752 INFO L422 BasicCegarLoop]: trace histogram [48, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:33:56,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 01:33:56,753 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:33:56,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:33:56,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1186046858, now seen corresponding path program 4 times [2020-10-27 01:33:56,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:33:56,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1816967093] [2020-10-27 01:33:56,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:33:56,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:56,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:56,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:56,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:56,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:56,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:57,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:57,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:00,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:01,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:01,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-27 01:34:01,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 01:34:01,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 01:34:01,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:01,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:34:01,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:34:01,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:34:01,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:01,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:01,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:01,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:01,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:01,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:01,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:01,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:34:01,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:01,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:01,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:01,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:01,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:01,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1914 backedges. 287 proven. 10 refuted. 0 times theorem prover too weak. 1617 trivial. 0 not checked. [2020-10-27 01:34:01,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1816967093] [2020-10-27 01:34:01,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:01,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:34:01,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619377112] [2020-10-27 01:34:01,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:34:01,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:01,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:34:01,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:34:01,959 INFO L87 Difference]: Start difference. First operand 97 states and 109 transitions. Second operand 8 states. [2020-10-27 01:34:02,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:02,377 INFO L93 Difference]: Finished difference Result 194 states and 229 transitions. [2020-10-27 01:34:02,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:34:02,377 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 96 [2020-10-27 01:34:02,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:02,379 INFO L225 Difference]: With dead ends: 194 [2020-10-27 01:34:02,379 INFO L226 Difference]: Without dead ends: 109 [2020-10-27 01:34:02,380 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:34:02,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-27 01:34:02,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2020-10-27 01:34:02,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-27 01:34:02,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 121 transitions. [2020-10-27 01:34:02,444 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 121 transitions. Word has length 96 [2020-10-27 01:34:02,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:02,444 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 121 transitions. [2020-10-27 01:34:02,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:34:02,445 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 121 transitions. [2020-10-27 01:34:02,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-27 01:34:02,447 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:02,447 INFO L422 BasicCegarLoop]: trace histogram [60, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:02,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 01:34:02,447 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:02,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:02,448 INFO L82 PathProgramCache]: Analyzing trace with hash -97211138, now seen corresponding path program 5 times [2020-10-27 01:34:02,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:02,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2008111537] [2020-10-27 01:34:02,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:02,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:02,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:02,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:02,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:02,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:02,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:02,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:02,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:07,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:07,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-27 01:34:07,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 01:34:07,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 01:34:07,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:07,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:34:07,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:34:07,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:34:07,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:07,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:07,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:07,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:07,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:07,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:07,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:07,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:34:07,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:07,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:07,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:07,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:07,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:07,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2700 backedges. 408 proven. 15 refuted. 0 times theorem prover too weak. 2277 trivial. 0 not checked. [2020-10-27 01:34:07,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2008111537] [2020-10-27 01:34:07,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:07,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:34:07,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104698290] [2020-10-27 01:34:07,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:34:07,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:07,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:34:07,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:34:07,661 INFO L87 Difference]: Start difference. First operand 109 states and 121 transitions. Second operand 9 states. [2020-10-27 01:34:07,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:07,993 INFO L93 Difference]: Finished difference Result 217 states and 252 transitions. [2020-10-27 01:34:07,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:34:07,994 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 108 [2020-10-27 01:34:07,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:07,995 INFO L225 Difference]: With dead ends: 217 [2020-10-27 01:34:07,995 INFO L226 Difference]: Without dead ends: 121 [2020-10-27 01:34:07,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 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 01:34:07,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-27 01:34:08,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2020-10-27 01:34:08,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-27 01:34:08,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 133 transitions. [2020-10-27 01:34:08,036 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 133 transitions. Word has length 108 [2020-10-27 01:34:08,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:08,036 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 133 transitions. [2020-10-27 01:34:08,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:34:08,037 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 133 transitions. [2020-10-27 01:34:08,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-27 01:34:08,038 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:08,038 INFO L422 BasicCegarLoop]: trace histogram [72, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:08,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 01:34:08,038 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:08,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:08,039 INFO L82 PathProgramCache]: Analyzing trace with hash -990140918, now seen corresponding path program 6 times [2020-10-27 01:34:08,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:08,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1169058270] [2020-10-27 01:34:08,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:08,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:08,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:08,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:08,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:08,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:08,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:08,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:08,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:13,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:13,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-27 01:34:13,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 01:34:13,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 01:34:13,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:13,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:34:13,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:34:13,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:34:13,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:13,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:13,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:13,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:13,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:13,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:13,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:13,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:34:13,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:13,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:13,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:13,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:13,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:13,259 INFO L134 CoverageAnalysis]: Checked inductivity of 3630 backedges. 551 proven. 21 refuted. 0 times theorem prover too weak. 3058 trivial. 0 not checked. [2020-10-27 01:34:13,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1169058270] [2020-10-27 01:34:13,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:13,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:34:13,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899974742] [2020-10-27 01:34:13,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:34:13,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:13,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:34:13,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:34:13,262 INFO L87 Difference]: Start difference. First operand 121 states and 133 transitions. Second operand 10 states. [2020-10-27 01:34:13,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:13,703 INFO L93 Difference]: Finished difference Result 240 states and 275 transitions. [2020-10-27 01:34:13,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:34:13,704 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 120 [2020-10-27 01:34:13,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:13,705 INFO L225 Difference]: With dead ends: 240 [2020-10-27 01:34:13,705 INFO L226 Difference]: Without dead ends: 133 [2020-10-27 01:34:13,706 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:34:13,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-27 01:34:13,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2020-10-27 01:34:13,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-27 01:34:13,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 145 transitions. [2020-10-27 01:34:13,745 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 145 transitions. Word has length 120 [2020-10-27 01:34:13,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:13,745 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 145 transitions. [2020-10-27 01:34:13,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:34:13,745 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 145 transitions. [2020-10-27 01:34:13,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-27 01:34:13,747 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:13,747 INFO L422 BasicCegarLoop]: trace histogram [84, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:13,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 01:34:13,747 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:13,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:13,748 INFO L82 PathProgramCache]: Analyzing trace with hash -243682946, now seen corresponding path program 7 times [2020-10-27 01:34:13,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:13,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [975559890] [2020-10-27 01:34:13,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:13,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:13,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:13,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:14,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:14,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:14,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:14,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:14,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:18,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:18,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-27 01:34:18,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 01:34:18,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-27 01:34:18,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:18,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:34:18,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:34:18,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 01:34:18,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:18,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:18,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:18,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:18,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:18,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:18,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:18,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:34:18,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:18,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:18,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:18,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:18,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:19,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 716 proven. 28 refuted. 0 times theorem prover too weak. 3960 trivial. 0 not checked. [2020-10-27 01:34:19,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [975559890] [2020-10-27 01:34:19,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:19,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:34:19,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683563551] [2020-10-27 01:34:19,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:34:19,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:19,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:34:19,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:34:19,005 INFO L87 Difference]: Start difference. First operand 133 states and 145 transitions. Second operand 11 states. [2020-10-27 01:34:19,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:19,516 INFO L93 Difference]: Finished difference Result 263 states and 298 transitions. [2020-10-27 01:34:19,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:34:19,517 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 132 [2020-10-27 01:34:19,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:19,518 INFO L225 Difference]: With dead ends: 263 [2020-10-27 01:34:19,518 INFO L226 Difference]: Without dead ends: 145 [2020-10-27 01:34:19,519 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:34:19,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-27 01:34:19,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2020-10-27 01:34:19,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-27 01:34:19,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 157 transitions. [2020-10-27 01:34:19,561 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 157 transitions. Word has length 132 [2020-10-27 01:34:19,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:19,561 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 157 transitions. [2020-10-27 01:34:19,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:34:19,561 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 157 transitions. [2020-10-27 01:34:19,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-10-27 01:34:19,563 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:19,563 INFO L422 BasicCegarLoop]: trace histogram [96, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:19,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 01:34:19,564 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:19,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:19,564 INFO L82 PathProgramCache]: Analyzing trace with hash -447494006, now seen corresponding path program 8 times [2020-10-27 01:34:19,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:19,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1691173032] [2020-10-27 01:34:19,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:19,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:19,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:19,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:19,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:19,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:19,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:19,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:20,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:24,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:24,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-27 01:34:24,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 01:34:24,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-27 01:34:24,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:24,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:34:24,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:34:24,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:34:24,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:24,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:24,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:24,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:24,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:24,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:24,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:24,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:34:24,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:24,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:24,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:24,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:24,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:24,867 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 903 proven. 36 refuted. 0 times theorem prover too weak. 4983 trivial. 0 not checked. [2020-10-27 01:34:24,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1691173032] [2020-10-27 01:34:24,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:24,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:34:24,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805591856] [2020-10-27 01:34:24,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:34:24,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:24,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:34:24,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:34:24,869 INFO L87 Difference]: Start difference. First operand 145 states and 157 transitions. Second operand 12 states. [2020-10-27 01:34:25,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:25,462 INFO L93 Difference]: Finished difference Result 286 states and 321 transitions. [2020-10-27 01:34:25,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:34:25,465 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 144 [2020-10-27 01:34:25,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:25,467 INFO L225 Difference]: With dead ends: 286 [2020-10-27 01:34:25,467 INFO L226 Difference]: Without dead ends: 157 [2020-10-27 01:34:25,468 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:34:25,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-27 01:34:25,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2020-10-27 01:34:25,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-27 01:34:25,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 169 transitions. [2020-10-27 01:34:25,517 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 169 transitions. Word has length 144 [2020-10-27 01:34:25,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:25,517 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 169 transitions. [2020-10-27 01:34:25,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:34:25,517 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 169 transitions. [2020-10-27 01:34:25,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-10-27 01:34:25,519 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:25,519 INFO L422 BasicCegarLoop]: trace histogram [108, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:25,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 01:34:25,520 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:25,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:25,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1057155586, now seen corresponding path program 9 times [2020-10-27 01:34:25,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:25,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [288402402] [2020-10-27 01:34:25,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:25,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:25,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:25,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:25,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:25,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:25,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:26,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:26,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:30,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:30,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 166 [2020-10-27 01:34:30,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 01:34:30,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-27 01:34:30,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:30,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:34:30,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:34:30,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 01:34:30,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:30,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:30,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:30,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:30,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:30,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:30,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:30,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:34:30,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:30,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:30,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:30,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:30,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:30,859 INFO L134 CoverageAnalysis]: Checked inductivity of 7284 backedges. 1112 proven. 45 refuted. 0 times theorem prover too weak. 6127 trivial. 0 not checked. [2020-10-27 01:34:30,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [288402402] [2020-10-27 01:34:30,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:30,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:34:30,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002271643] [2020-10-27 01:34:30,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:34:30,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:30,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:34:30,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:34:30,861 INFO L87 Difference]: Start difference. First operand 157 states and 169 transitions. Second operand 13 states. [2020-10-27 01:34:31,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:31,525 INFO L93 Difference]: Finished difference Result 309 states and 344 transitions. [2020-10-27 01:34:31,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:34:31,526 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 156 [2020-10-27 01:34:31,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:31,528 INFO L225 Difference]: With dead ends: 309 [2020-10-27 01:34:31,528 INFO L226 Difference]: Without dead ends: 169 [2020-10-27 01:34:31,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:34:31,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-27 01:34:31,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2020-10-27 01:34:31,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-27 01:34:31,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 181 transitions. [2020-10-27 01:34:31,580 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 181 transitions. Word has length 156 [2020-10-27 01:34:31,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:31,580 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 181 transitions. [2020-10-27 01:34:31,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:34:31,581 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 181 transitions. [2020-10-27 01:34:31,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-10-27 01:34:31,582 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:31,583 INFO L422 BasicCegarLoop]: trace histogram [120, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:31,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 01:34:31,583 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:31,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:31,584 INFO L82 PathProgramCache]: Analyzing trace with hash 99224330, now seen corresponding path program 10 times [2020-10-27 01:34:31,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:31,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1755143060] [2020-10-27 01:34:31,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:31,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:31,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:31,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:36,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:36,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 178 [2020-10-27 01:34:36,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:34:36,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-27 01:34:36,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:36,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:34:36,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:36,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 158 [2020-10-27 01:34:36,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:37,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:37,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:37,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:37,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:37,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:37,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:37,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:34:37,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:37,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:37,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:37,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:37,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:37,100 INFO L134 CoverageAnalysis]: Checked inductivity of 8790 backedges. 0 proven. 8130 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2020-10-27 01:34:37,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1755143060] [2020-10-27 01:34:37,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:37,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:34:37,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429365412] [2020-10-27 01:34:37,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:34:37,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:37,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:34:37,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:34:37,102 INFO L87 Difference]: Start difference. First operand 169 states and 181 transitions. Second operand 16 states. [2020-10-27 01:34:38,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:38,312 INFO L93 Difference]: Finished difference Result 200 states and 214 transitions. [2020-10-27 01:34:38,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:34:38,312 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 168 [2020-10-27 01:34:38,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:38,314 INFO L225 Difference]: With dead ends: 200 [2020-10-27 01:34:38,315 INFO L226 Difference]: Without dead ends: 194 [2020-10-27 01:34:38,315 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 01:34:38,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-27 01:34:38,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 182. [2020-10-27 01:34:38,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-10-27 01:34:38,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 195 transitions. [2020-10-27 01:34:38,368 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 195 transitions. Word has length 168 [2020-10-27 01:34:38,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:38,368 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 195 transitions. [2020-10-27 01:34:38,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:34:38,369 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 195 transitions. [2020-10-27 01:34:38,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-10-27 01:34:38,370 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:38,371 INFO L422 BasicCegarLoop]: trace histogram [130, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:38,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 01:34:38,371 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:38,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:38,371 INFO L82 PathProgramCache]: Analyzing trace with hash 279090417, now seen corresponding path program 11 times [2020-10-27 01:34:38,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:38,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1717530106] [2020-10-27 01:34:38,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:38,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:38,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:39,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:43,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:43,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 191 [2020-10-27 01:34:43,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:34:43,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5057 [2020-10-27 01:34:43,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:43,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:34:43,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:43,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 171 [2020-10-27 01:34:43,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:43,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:43,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:43,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:43,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:43,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:43,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:43,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:34:43,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:43,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:43,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:43,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:43,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:43,918 INFO L134 CoverageAnalysis]: Checked inductivity of 10322 backedges. 0 proven. 9607 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2020-10-27 01:34:43,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1717530106] [2020-10-27 01:34:43,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:43,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:34:43,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026520516] [2020-10-27 01:34:43,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:34:43,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:43,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:34:43,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:34:43,920 INFO L87 Difference]: Start difference. First operand 182 states and 195 transitions. Second operand 17 states. [2020-10-27 01:34:45,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:45,244 INFO L93 Difference]: Finished difference Result 213 states and 228 transitions. [2020-10-27 01:34:45,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:34:45,244 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 181 [2020-10-27 01:34:45,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:45,246 INFO L225 Difference]: With dead ends: 213 [2020-10-27 01:34:45,247 INFO L226 Difference]: Without dead ends: 207 [2020-10-27 01:34:45,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:34:45,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-27 01:34:45,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 195. [2020-10-27 01:34:45,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-10-27 01:34:45,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 209 transitions. [2020-10-27 01:34:45,311 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 209 transitions. Word has length 181 [2020-10-27 01:34:45,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:45,312 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 209 transitions. [2020-10-27 01:34:45,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:34:45,312 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 209 transitions. [2020-10-27 01:34:45,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-10-27 01:34:45,314 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:45,315 INFO L422 BasicCegarLoop]: trace histogram [140, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:45,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 01:34:45,315 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:45,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:45,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1326343574, now seen corresponding path program 12 times [2020-10-27 01:34:45,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:45,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [249133659] [2020-10-27 01:34:45,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:45,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:45,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:46,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:50,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:50,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 204 [2020-10-27 01:34:50,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:34:50,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 01:34:50,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:50,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 01:34:50,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:50,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 184 [2020-10-27 01:34:50,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:50,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:50,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:50,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:50,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:50,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:50,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:50,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:34:50,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:50,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:50,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:50,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:50,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:51,035 INFO L134 CoverageAnalysis]: Checked inductivity of 11977 backedges. 0 proven. 11207 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2020-10-27 01:34:51,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [249133659] [2020-10-27 01:34:51,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:51,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 01:34:51,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344735612] [2020-10-27 01:34:51,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 01:34:51,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:51,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 01:34:51,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:34:51,037 INFO L87 Difference]: Start difference. First operand 195 states and 209 transitions. Second operand 18 states. [2020-10-27 01:34:52,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:52,543 INFO L93 Difference]: Finished difference Result 226 states and 242 transitions. [2020-10-27 01:34:52,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:34:52,543 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 194 [2020-10-27 01:34:52,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:52,545 INFO L225 Difference]: With dead ends: 226 [2020-10-27 01:34:52,545 INFO L226 Difference]: Without dead ends: 220 [2020-10-27 01:34:52,547 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 01:34:52,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-27 01:34:52,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 208. [2020-10-27 01:34:52,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-10-27 01:34:52,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 223 transitions. [2020-10-27 01:34:52,609 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 223 transitions. Word has length 194 [2020-10-27 01:34:52,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:52,610 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 223 transitions. [2020-10-27 01:34:52,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 01:34:52,610 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 223 transitions. [2020-10-27 01:34:52,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2020-10-27 01:34:52,611 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:52,612 INFO L422 BasicCegarLoop]: trace histogram [150, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:52,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 01:34:52,612 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:52,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:52,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1606877585, now seen corresponding path program 13 times [2020-10-27 01:34:52,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:52,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [830017717] [2020-10-27 01:34:52,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:52,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:52,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:53,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:57,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:57,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 217 [2020-10-27 01:34:57,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:34:57,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5101 [2020-10-27 01:34:57,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:57,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 01:34:57,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:57,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 197 [2020-10-27 01:34:57,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:58,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:58,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:58,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:58,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:58,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:58,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:58,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:34:58,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:58,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:58,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:58,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:58,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:58,348 INFO L134 CoverageAnalysis]: Checked inductivity of 13755 backedges. 0 proven. 12930 refuted. 0 times theorem prover too weak. 825 trivial. 0 not checked. [2020-10-27 01:34:58,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [830017717] [2020-10-27 01:34:58,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:58,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 01:34:58,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256202469] [2020-10-27 01:34:58,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 01:34:58,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:58,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 01:34:58,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:34:58,351 INFO L87 Difference]: Start difference. First operand 208 states and 223 transitions. Second operand 19 states. [2020-10-27 01:35:00,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:35:00,017 INFO L93 Difference]: Finished difference Result 239 states and 256 transitions. [2020-10-27 01:35:00,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:35:00,018 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 207 [2020-10-27 01:35:00,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:35:00,020 INFO L225 Difference]: With dead ends: 239 [2020-10-27 01:35:00,020 INFO L226 Difference]: Without dead ends: 233 [2020-10-27 01:35:00,021 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:35:00,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-27 01:35:00,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 221. [2020-10-27 01:35:00,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-10-27 01:35:00,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 237 transitions. [2020-10-27 01:35:00,081 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 237 transitions. Word has length 207 [2020-10-27 01:35:00,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:35:00,081 INFO L481 AbstractCegarLoop]: Abstraction has 221 states and 237 transitions. [2020-10-27 01:35:00,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 01:35:00,081 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 237 transitions. [2020-10-27 01:35:00,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-10-27 01:35:00,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:35:00,083 INFO L422 BasicCegarLoop]: trace histogram [160, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:35:00,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 01:35:00,083 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:35:00,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:35:00,084 INFO L82 PathProgramCache]: Analyzing trace with hash -671436342, now seen corresponding path program 14 times [2020-10-27 01:35:00,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:35:00,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [15972960] [2020-10-27 01:35:00,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:35:00,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:00,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:00,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:05,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:05,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 230 [2020-10-27 01:35:05,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:35:05,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-10-27 01:35:05,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:05,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 01:35:05,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:35:05,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 210 [2020-10-27 01:35:05,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:05,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:35:05,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:05,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:05,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:05,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:35:05,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:35:05,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:35:05,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:05,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:35:05,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:35:05,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:35:05,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:05,772 INFO L134 CoverageAnalysis]: Checked inductivity of 15656 backedges. 0 proven. 14776 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked. [2020-10-27 01:35:05,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [15972960] [2020-10-27 01:35:05,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:35:05,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 01:35:05,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846980502] [2020-10-27 01:35:05,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 01:35:05,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:35:05,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 01:35:05,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:35:05,775 INFO L87 Difference]: Start difference. First operand 221 states and 237 transitions. Second operand 20 states. [2020-10-27 01:35:07,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:35:07,731 INFO L93 Difference]: Finished difference Result 252 states and 270 transitions. [2020-10-27 01:35:07,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 01:35:07,732 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 220 [2020-10-27 01:35:07,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:35:07,733 INFO L225 Difference]: With dead ends: 252 [2020-10-27 01:35:07,733 INFO L226 Difference]: Without dead ends: 246 [2020-10-27 01:35:07,734 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=153, Invalid=1179, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 01:35:07,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-27 01:35:07,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 234. [2020-10-27 01:35:07,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-10-27 01:35:07,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 251 transitions. [2020-10-27 01:35:07,798 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 251 transitions. Word has length 220 [2020-10-27 01:35:07,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:35:07,799 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 251 transitions. [2020-10-27 01:35:07,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 01:35:07,799 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 251 transitions. [2020-10-27 01:35:07,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-10-27 01:35:07,801 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:35:07,801 INFO L422 BasicCegarLoop]: trace histogram [170, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:35:07,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 01:35:07,801 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:35:07,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:35:07,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1336337969, now seen corresponding path program 15 times [2020-10-27 01:35:07,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:35:07,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1570799027] [2020-10-27 01:35:07,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:35:07,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:07,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:09,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:12,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:12,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 243 [2020-10-27 01:35:12,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:35:12,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 01:35:12,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:12,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 01:35:12,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:35:12,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 223 [2020-10-27 01:35:12,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:13,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:35:13,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:13,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:13,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:13,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:35:13,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:35:13,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:35:13,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:13,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:35:13,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:35:13,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:35:13,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:13,489 INFO L134 CoverageAnalysis]: Checked inductivity of 17680 backedges. 0 proven. 16745 refuted. 0 times theorem prover too weak. 935 trivial. 0 not checked. [2020-10-27 01:35:13,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1570799027] [2020-10-27 01:35:13,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:35:13,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 01:35:13,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793229450] [2020-10-27 01:35:13,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 01:35:13,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:35:13,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 01:35:13,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:35:13,492 INFO L87 Difference]: Start difference. First operand 234 states and 251 transitions. Second operand 21 states. [2020-10-27 01:35:15,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:35:15,524 INFO L93 Difference]: Finished difference Result 265 states and 284 transitions. [2020-10-27 01:35:15,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 01:35:15,525 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 233 [2020-10-27 01:35:15,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:35:15,527 INFO L225 Difference]: With dead ends: 265 [2020-10-27 01:35:15,528 INFO L226 Difference]: Without dead ends: 259 [2020-10-27 01:35:15,531 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 01:35:15,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-10-27 01:35:15,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 247. [2020-10-27 01:35:15,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-10-27 01:35:15,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 265 transitions. [2020-10-27 01:35:15,608 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 265 transitions. Word has length 233 [2020-10-27 01:35:15,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:35:15,609 INFO L481 AbstractCegarLoop]: Abstraction has 247 states and 265 transitions. [2020-10-27 01:35:15,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 01:35:15,609 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 265 transitions. [2020-10-27 01:35:15,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2020-10-27 01:35:15,611 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:35:15,611 INFO L422 BasicCegarLoop]: trace histogram [180, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:35:15,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 01:35:15,611 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:35:15,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:35:15,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1666494166, now seen corresponding path program 16 times [2020-10-27 01:35:15,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:35:15,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1025645086] [2020-10-27 01:35:15,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:35:15,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:15,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:17,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:20,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:20,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 256 [2020-10-27 01:35:20,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:35:20,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5084 [2020-10-27 01:35:20,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:20,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 01:35:20,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:35:20,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 236 [2020-10-27 01:35:20,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:21,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:35:21,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:21,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:21,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:21,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:35:21,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:35:21,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:35:21,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:21,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:35:21,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:35:21,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:35:21,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:21,513 INFO L134 CoverageAnalysis]: Checked inductivity of 19827 backedges. 0 proven. 18837 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2020-10-27 01:35:21,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1025645086] [2020-10-27 01:35:21,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:35:21,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 01:35:21,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294798804] [2020-10-27 01:35:21,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 01:35:21,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:35:21,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 01:35:21,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:35:21,516 INFO L87 Difference]: Start difference. First operand 247 states and 265 transitions. Second operand 22 states. [2020-10-27 01:35:23,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:35:23,792 INFO L93 Difference]: Finished difference Result 278 states and 298 transitions. [2020-10-27 01:35:23,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 01:35:23,793 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 246 [2020-10-27 01:35:23,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:35:23,796 INFO L225 Difference]: With dead ends: 278 [2020-10-27 01:35:23,796 INFO L226 Difference]: Without dead ends: 272 [2020-10-27 01:35:23,798 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=171, Invalid=1469, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 01:35:23,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-10-27 01:35:23,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 260. [2020-10-27 01:35:23,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-10-27 01:35:23,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 279 transitions. [2020-10-27 01:35:23,886 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 279 transitions. Word has length 246 [2020-10-27 01:35:23,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:35:23,887 INFO L481 AbstractCegarLoop]: Abstraction has 260 states and 279 transitions. [2020-10-27 01:35:23,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 01:35:23,887 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 279 transitions. [2020-10-27 01:35:23,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2020-10-27 01:35:23,889 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:35:23,889 INFO L422 BasicCegarLoop]: trace histogram [190, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:35:23,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 01:35:23,889 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:35:23,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:35:23,890 INFO L82 PathProgramCache]: Analyzing trace with hash 475808465, now seen corresponding path program 17 times [2020-10-27 01:35:23,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:35:23,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1609289970] [2020-10-27 01:35:23,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:35:23,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:24,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:25,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:29,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:29,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 269 [2020-10-27 01:35:29,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:35:29,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-27 01:35:29,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:29,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 01:35:29,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:35:29,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 249 [2020-10-27 01:35:29,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:29,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:35:29,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:29,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:29,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:29,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:35:29,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:35:29,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:35:29,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:29,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:35:29,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:35:29,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:35:29,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:29,723 INFO L134 CoverageAnalysis]: Checked inductivity of 22097 backedges. 0 proven. 21052 refuted. 0 times theorem prover too weak. 1045 trivial. 0 not checked. [2020-10-27 01:35:29,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1609289970] [2020-10-27 01:35:29,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:35:29,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 01:35:29,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030508988] [2020-10-27 01:35:29,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 01:35:29,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:35:29,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 01:35:29,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:35:29,725 INFO L87 Difference]: Start difference. First operand 260 states and 279 transitions. Second operand 23 states. [2020-10-27 01:35:32,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:35:32,247 INFO L93 Difference]: Finished difference Result 291 states and 312 transitions. [2020-10-27 01:35:32,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 01:35:32,248 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 259 [2020-10-27 01:35:32,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:35:32,250 INFO L225 Difference]: With dead ends: 291 [2020-10-27 01:35:32,250 INFO L226 Difference]: Without dead ends: 285 [2020-10-27 01:35:32,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=180, Invalid=1626, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 01:35:32,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-10-27 01:35:32,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 273. [2020-10-27 01:35:32,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-10-27 01:35:32,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 293 transitions. [2020-10-27 01:35:32,342 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 293 transitions. Word has length 259 [2020-10-27 01:35:32,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:35:32,342 INFO L481 AbstractCegarLoop]: Abstraction has 273 states and 293 transitions. [2020-10-27 01:35:32,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 01:35:32,343 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 293 transitions. [2020-10-27 01:35:32,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2020-10-27 01:35:32,344 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:35:32,345 INFO L422 BasicCegarLoop]: trace histogram [200, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:35:32,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 01:35:32,345 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:35:32,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:35:32,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1121355638, now seen corresponding path program 18 times [2020-10-27 01:35:32,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:35:32,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1233125556] [2020-10-27 01:35:32,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:35:32,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:32,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:34,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:37,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:37,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 282 [2020-10-27 01:35:37,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:35:37,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-27 01:35:37,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:37,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 01:35:37,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:35:37,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 262 [2020-10-27 01:35:37,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:38,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:35:38,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:38,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:38,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:38,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:35:38,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:35:38,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:35:38,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:38,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:35:38,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:35:38,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:35:38,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:38,321 INFO L134 CoverageAnalysis]: Checked inductivity of 24490 backedges. 0 proven. 23390 refuted. 0 times theorem prover too weak. 1100 trivial. 0 not checked. [2020-10-27 01:35:38,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1233125556] [2020-10-27 01:35:38,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:35:38,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 01:35:38,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456254172] [2020-10-27 01:35:38,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 01:35:38,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:35:38,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 01:35:38,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:35:38,323 INFO L87 Difference]: Start difference. First operand 273 states and 293 transitions. Second operand 24 states. [2020-10-27 01:35:41,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:35:41,028 INFO L93 Difference]: Finished difference Result 304 states and 326 transitions. [2020-10-27 01:35:41,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 01:35:41,029 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 272 [2020-10-27 01:35:41,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:35:41,032 INFO L225 Difference]: With dead ends: 304 [2020-10-27 01:35:41,032 INFO L226 Difference]: Without dead ends: 298 [2020-10-27 01:35:41,034 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=189, Invalid=1791, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 01:35:41,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-10-27 01:35:41,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 286. [2020-10-27 01:35:41,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-10-27 01:35:41,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 307 transitions. [2020-10-27 01:35:41,142 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 307 transitions. Word has length 272 [2020-10-27 01:35:41,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:35:41,143 INFO L481 AbstractCegarLoop]: Abstraction has 286 states and 307 transitions. [2020-10-27 01:35:41,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 01:35:41,143 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 307 transitions. [2020-10-27 01:35:41,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2020-10-27 01:35:41,145 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:35:41,145 INFO L422 BasicCegarLoop]: trace histogram [210, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:35:41,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 01:35:41,145 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:35:41,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:35:41,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1249831055, now seen corresponding path program 19 times [2020-10-27 01:35:41,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:35:41,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1055590501] [2020-10-27 01:35:41,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:35:41,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:41,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:44,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:46,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:46,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 295 [2020-10-27 01:35:46,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:35:46,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5111 [2020-10-27 01:35:46,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:46,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 01:35:46,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:35:46,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 275 [2020-10-27 01:35:46,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:47,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:35:47,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:47,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:47,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:47,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:35:47,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:35:47,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:35:47,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:47,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:35:47,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:35:47,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:35:47,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:47,240 INFO L134 CoverageAnalysis]: Checked inductivity of 27006 backedges. 0 proven. 25851 refuted. 0 times theorem prover too weak. 1155 trivial. 0 not checked. [2020-10-27 01:35:47,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1055590501] [2020-10-27 01:35:47,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:35:47,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 01:35:47,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237016726] [2020-10-27 01:35:47,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 01:35:47,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:35:47,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 01:35:47,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:35:47,241 INFO L87 Difference]: Start difference. First operand 286 states and 307 transitions. Second operand 25 states. [2020-10-27 01:35:50,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:35:50,183 INFO L93 Difference]: Finished difference Result 317 states and 340 transitions. [2020-10-27 01:35:50,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 01:35:50,183 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 285 [2020-10-27 01:35:50,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:35:50,186 INFO L225 Difference]: With dead ends: 317 [2020-10-27 01:35:50,187 INFO L226 Difference]: Without dead ends: 311 [2020-10-27 01:35:50,188 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=198, Invalid=1964, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 01:35:50,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2020-10-27 01:35:50,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 299. [2020-10-27 01:35:50,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2020-10-27 01:35:50,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 321 transitions. [2020-10-27 01:35:50,275 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 321 transitions. Word has length 285 [2020-10-27 01:35:50,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:35:50,275 INFO L481 AbstractCegarLoop]: Abstraction has 299 states and 321 transitions. [2020-10-27 01:35:50,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 01:35:50,276 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 321 transitions. [2020-10-27 01:35:50,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2020-10-27 01:35:50,277 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:35:50,277 INFO L422 BasicCegarLoop]: trace histogram [220, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:35:50,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 01:35:50,277 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:35:50,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:35:50,278 INFO L82 PathProgramCache]: Analyzing trace with hash -199546902, now seen corresponding path program 20 times [2020-10-27 01:35:50,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:35:50,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [57970122] [2020-10-27 01:35:50,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:35:50,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:50,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:53,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:55,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:55,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 308 [2020-10-27 01:35:55,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:35:55,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-10-27 01:35:55,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:55,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 01:35:55,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:35:55,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 288 [2020-10-27 01:35:55,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:56,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:35:56,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:56,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:56,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:56,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:35:56,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:35:56,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:35:56,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:56,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:35:56,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:35:56,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:35:56,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:56,346 INFO L134 CoverageAnalysis]: Checked inductivity of 29645 backedges. 0 proven. 28435 refuted. 0 times theorem prover too weak. 1210 trivial. 0 not checked. [2020-10-27 01:35:56,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [57970122] [2020-10-27 01:35:56,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:35:56,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 01:35:56,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311863613] [2020-10-27 01:35:56,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 01:35:56,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:35:56,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 01:35:56,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2020-10-27 01:35:56,348 INFO L87 Difference]: Start difference. First operand 299 states and 321 transitions. Second operand 26 states. [2020-10-27 01:35:59,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:35:59,444 INFO L93 Difference]: Finished difference Result 330 states and 354 transitions. [2020-10-27 01:35:59,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 01:35:59,445 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 298 [2020-10-27 01:35:59,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:35:59,448 INFO L225 Difference]: With dead ends: 330 [2020-10-27 01:35:59,448 INFO L226 Difference]: Without dead ends: 324 [2020-10-27 01:35:59,449 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=207, Invalid=2145, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 01:35:59,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2020-10-27 01:35:59,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 312. [2020-10-27 01:35:59,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2020-10-27 01:35:59,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 335 transitions. [2020-10-27 01:35:59,531 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 335 transitions. Word has length 298 [2020-10-27 01:35:59,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:35:59,532 INFO L481 AbstractCegarLoop]: Abstraction has 312 states and 335 transitions. [2020-10-27 01:35:59,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 01:35:59,532 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 335 transitions. [2020-10-27 01:35:59,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2020-10-27 01:35:59,534 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:35:59,534 INFO L422 BasicCegarLoop]: trace histogram [230, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:35:59,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 01:35:59,535 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:35:59,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:35:59,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1580164113, now seen corresponding path program 21 times [2020-10-27 01:35:59,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:35:59,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2129968850] [2020-10-27 01:35:59,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:35:59,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:59,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:03,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:04,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:36:04,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 321 [2020-10-27 01:36:04,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:36:04,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5129 [2020-10-27 01:36:04,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:36:04,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 01:36:04,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:36:04,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 301 [2020-10-27 01:36:04,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:36:05,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:36:05,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:36:05,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:05,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:36:05,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:36:05,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:36:05,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:36:05,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:36:05,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:36:05,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:36:05,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:36:05,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:36:05,770 INFO L134 CoverageAnalysis]: Checked inductivity of 32407 backedges. 0 proven. 31142 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2020-10-27 01:36:05,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2129968850] [2020-10-27 01:36:05,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:36:05,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 01:36:05,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256963257] [2020-10-27 01:36:05,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 01:36:05,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:36:05,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 01:36:05,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:36:05,772 INFO L87 Difference]: Start difference. First operand 312 states and 335 transitions. Second operand 27 states. [2020-10-27 01:36:09,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:36:09,182 INFO L93 Difference]: Finished difference Result 343 states and 368 transitions. [2020-10-27 01:36:09,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 01:36:09,183 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 311 [2020-10-27 01:36:09,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:36:09,185 INFO L225 Difference]: With dead ends: 343 [2020-10-27 01:36:09,185 INFO L226 Difference]: Without dead ends: 337 [2020-10-27 01:36:09,187 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=216, Invalid=2334, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 01:36:09,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2020-10-27 01:36:09,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 325. [2020-10-27 01:36:09,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2020-10-27 01:36:09,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 349 transitions. [2020-10-27 01:36:09,278 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 349 transitions. Word has length 311 [2020-10-27 01:36:09,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:36:09,278 INFO L481 AbstractCegarLoop]: Abstraction has 325 states and 349 transitions. [2020-10-27 01:36:09,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 01:36:09,278 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 349 transitions. [2020-10-27 01:36:09,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-10-27 01:36:09,280 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:36:09,280 INFO L422 BasicCegarLoop]: trace histogram [240, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:36:09,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 01:36:09,280 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:36:09,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:36:09,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1487298378, now seen corresponding path program 22 times [2020-10-27 01:36:09,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:36:09,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [466591000] [2020-10-27 01:36:09,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:36:09,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:36:09,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:13,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:14,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:36:14,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 334 [2020-10-27 01:36:14,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:36:14,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5067 [2020-10-27 01:36:14,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:36:14,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 01:36:14,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:36:14,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 314 [2020-10-27 01:36:14,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:36:15,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:36:15,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:36:15,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:15,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:36:15,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:36:15,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:36:15,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:36:15,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:36:15,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:36:15,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:36:15,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:36:15,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:36:15,480 INFO L134 CoverageAnalysis]: Checked inductivity of 35292 backedges. 0 proven. 33972 refuted. 0 times theorem prover too weak. 1320 trivial. 0 not checked. [2020-10-27 01:36:15,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [466591000] [2020-10-27 01:36:15,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:36:15,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 01:36:15,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49978518] [2020-10-27 01:36:15,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 01:36:15,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:36:15,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 01:36:15,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2020-10-27 01:36:15,482 INFO L87 Difference]: Start difference. First operand 325 states and 349 transitions. Second operand 28 states. [2020-10-27 01:36:19,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:36:19,147 INFO L93 Difference]: Finished difference Result 356 states and 382 transitions. [2020-10-27 01:36:19,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 01:36:19,148 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 324 [2020-10-27 01:36:19,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:36:19,150 INFO L225 Difference]: With dead ends: 356 [2020-10-27 01:36:19,150 INFO L226 Difference]: Without dead ends: 350 [2020-10-27 01:36:19,152 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 01:36:19,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2020-10-27 01:36:19,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 338. [2020-10-27 01:36:19,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 338 states. [2020-10-27 01:36:19,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 363 transitions. [2020-10-27 01:36:19,257 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 363 transitions. Word has length 324 [2020-10-27 01:36:19,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:36:19,258 INFO L481 AbstractCegarLoop]: Abstraction has 338 states and 363 transitions. [2020-10-27 01:36:19,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 01:36:19,258 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 363 transitions. [2020-10-27 01:36:19,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-10-27 01:36:19,259 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:36:19,259 INFO L422 BasicCegarLoop]: trace histogram [250, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:36:19,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 01:36:19,260 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:36:19,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:36:19,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1291921585, now seen corresponding path program 23 times [2020-10-27 01:36:19,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:36:19,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [162758105] [2020-10-27 01:36:19,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:36:19,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:36:19,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:23,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:24,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:36:24,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 347 [2020-10-27 01:36:24,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:36:24,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5096 [2020-10-27 01:36:24,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:36:24,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 01:36:24,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:36:24,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 327 [2020-10-27 01:36:24,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:36:25,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:36:25,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:36:25,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:25,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:36:25,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:36:25,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:36:25,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:36:25,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:36:25,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:36:25,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:36:25,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:36:25,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:36:25,573 INFO L134 CoverageAnalysis]: Checked inductivity of 38300 backedges. 0 proven. 36925 refuted. 0 times theorem prover too weak. 1375 trivial. 0 not checked. [2020-10-27 01:36:25,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [162758105] [2020-10-27 01:36:25,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:36:25,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 01:36:25,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223206602] [2020-10-27 01:36:25,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 01:36:25,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:36:25,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 01:36:25,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:36:25,576 INFO L87 Difference]: Start difference. First operand 338 states and 363 transitions. Second operand 29 states. [2020-10-27 01:36:29,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:36:29,507 INFO L93 Difference]: Finished difference Result 369 states and 396 transitions. [2020-10-27 01:36:29,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 01:36:29,507 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 337 [2020-10-27 01:36:29,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:36:29,509 INFO L225 Difference]: With dead ends: 369 [2020-10-27 01:36:29,510 INFO L226 Difference]: Without dead ends: 363 [2020-10-27 01:36:29,511 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=234, Invalid=2736, Unknown=0, NotChecked=0, Total=2970 [2020-10-27 01:36:29,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2020-10-27 01:36:29,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 351. [2020-10-27 01:36:29,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2020-10-27 01:36:29,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 377 transitions. [2020-10-27 01:36:29,615 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 377 transitions. Word has length 337 [2020-10-27 01:36:29,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:36:29,616 INFO L481 AbstractCegarLoop]: Abstraction has 351 states and 377 transitions. [2020-10-27 01:36:29,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 01:36:29,616 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 377 transitions. [2020-10-27 01:36:29,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2020-10-27 01:36:29,618 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:36:29,619 INFO L422 BasicCegarLoop]: trace histogram [260, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:36:29,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 01:36:29,619 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:36:29,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:36:29,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1099882838, now seen corresponding path program 24 times [2020-10-27 01:36:29,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:36:29,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1855624074] [2020-10-27 01:36:29,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:36:29,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:36:29,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:34,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:34,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:36:34,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 360 [2020-10-27 01:36:34,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:36:34,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5046 [2020-10-27 01:36:34,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:36:34,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 01:36:34,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:36:34,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 340 [2020-10-27 01:36:34,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:36:35,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:36:35,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:36:35,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:35,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:36:35,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:36:35,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:36:35,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:36:35,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:36:35,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:36:35,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:36:35,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:36:35,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0