/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=DEEPEST --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/array-fpi/res2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 14:39:39,073 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 14:39:39,076 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 14:39:39,114 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 14:39:39,115 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 14:39:39,116 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 14:39:39,118 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 14:39:39,121 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 14:39:39,123 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 14:39:39,124 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 14:39:39,126 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 14:39:39,127 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 14:39:39,128 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 14:39:39,129 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 14:39:39,131 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 14:39:39,132 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 14:39:39,133 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 14:39:39,154 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 14:39:39,161 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 14:39:39,164 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 14:39:39,166 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 14:39:39,167 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 14:39:39,169 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 14:39:39,170 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 14:39:39,173 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 14:39:39,174 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 14:39:39,174 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 14:39:39,175 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 14:39:39,176 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 14:39:39,178 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 14:39:39,178 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 14:39:39,179 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 14:39:39,180 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 14:39:39,181 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 14:39:39,182 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 14:39:39,183 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 14:39:39,183 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 14:39:39,184 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 14:39:39,184 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 14:39:39,185 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 14:39:39,186 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 14:39:39,187 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 14:39:39,215 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 14:39:39,215 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 14:39:39,217 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 14:39:39,217 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 14:39:39,218 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 14:39:39,218 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 14:39:39,218 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 14:39:39,218 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 14:39:39,219 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 14:39:39,219 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 14:39:39,219 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 14:39:39,220 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 14:39:39,220 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 14:39:39,220 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 14:39:39,220 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 14:39:39,221 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 14:39:39,221 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 14:39:39,221 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 14:39:39,222 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 14:39:39,222 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 14:39:39,222 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 14:39:39,222 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:39:39,222 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 14:39:39,223 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 14:39:39,225 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 14:39:39,225 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 14:39:39,226 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 14:39:39,226 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 14:39:39,226 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 14:39:39,226 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 14:39:39,653 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 14:39:39,704 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 14:39:39,708 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 14:39:39,709 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 14:39:39,710 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 14:39:39,713 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/res2.c [2020-10-27 14:39:39,801 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6ca1fe4e5/31144148cea44fbe819f84cdd0fae36d/FLAG2c13073c0 [2020-10-27 14:39:40,549 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 14:39:40,550 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/res2.c [2020-10-27 14:39:40,559 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6ca1fe4e5/31144148cea44fbe819f84cdd0fae36d/FLAG2c13073c0 [2020-10-27 14:39:40,885 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6ca1fe4e5/31144148cea44fbe819f84cdd0fae36d [2020-10-27 14:39:40,890 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 14:39:40,897 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 14:39:40,901 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 14:39:40,901 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 14:39:40,905 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 14:39:40,906 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:39:40" (1/1) ... [2020-10-27 14:39:40,910 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2107b355 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:39:40, skipping insertion in model container [2020-10-27 14:39:40,910 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:39:40" (1/1) ... [2020-10-27 14:39:40,919 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 14:39:40,937 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 14:39:41,128 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:39:41,150 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 14:39:41,178 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:39:41,195 INFO L208 MainTranslator]: Completed translation [2020-10-27 14:39:41,196 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:39:41 WrapperNode [2020-10-27 14:39:41,196 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 14:39:41,197 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 14:39:41,197 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 14:39:41,198 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 14:39:41,211 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:39:41" (1/1) ... [2020-10-27 14:39:41,211 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:39:41" (1/1) ... [2020-10-27 14:39:41,221 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:39:41" (1/1) ... [2020-10-27 14:39:41,221 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:39:41" (1/1) ... [2020-10-27 14:39:41,233 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:39:41" (1/1) ... [2020-10-27 14:39:41,240 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:39:41" (1/1) ... [2020-10-27 14:39:41,242 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:39:41" (1/1) ... [2020-10-27 14:39:41,245 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 14:39:41,246 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 14:39:41,246 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 14:39:41,247 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 14:39:41,248 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:39:41" (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 14:39:41,326 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 14:39:41,327 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 14:39:41,327 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 14:39:41,328 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 14:39:41,328 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 14:39:41,329 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 14:39:41,329 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 14:39:41,329 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 14:39:41,329 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 14:39:41,329 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 14:39:41,330 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 14:39:41,331 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 14:39:41,331 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 14:39:41,331 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 14:39:41,331 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 14:39:41,332 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 14:39:41,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 14:39:41,332 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 14:39:41,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 14:39:41,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 14:39:41,333 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 14:39:41,333 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 14:39:41,771 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 14:39:41,772 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-27 14:39:41,774 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:39:41 BoogieIcfgContainer [2020-10-27 14:39:41,774 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 14:39:41,776 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 14:39:41,776 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 14:39:41,779 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 14:39:41,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:39:40" (1/3) ... [2020-10-27 14:39:41,781 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7af7f859 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:39:41, skipping insertion in model container [2020-10-27 14:39:41,781 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:39:41" (2/3) ... [2020-10-27 14:39:41,781 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7af7f859 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:39:41, skipping insertion in model container [2020-10-27 14:39:41,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:39:41" (3/3) ... [2020-10-27 14:39:41,783 INFO L111 eAbstractionObserver]: Analyzing ICFG res2.c [2020-10-27 14:39:41,796 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 14:39:41,801 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 14:39:41,815 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 14:39:41,845 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 14:39:41,845 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 14:39:41,846 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 14:39:41,846 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 14:39:41,846 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 14:39:41,846 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 14:39:41,846 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 14:39:41,846 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 14:39:41,866 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2020-10-27 14:39:41,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 14:39:41,874 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:39:41,875 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:39:41,876 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:39:41,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:39:41,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1686177906, now seen corresponding path program 1 times [2020-10-27 14:39:41,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:39:41,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [651029364] [2020-10-27 14:39:41,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:39:42,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:42,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:42,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:42,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:42,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:42,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:42,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:42,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:44,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:45,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:45,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 14:39:45,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 14:39:45,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3934 [2020-10-27 14:39:46,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:46,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:46,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-27 14:39:46,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:46,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 14:39:46,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:39:46,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:46,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:46,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:46,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:39:46,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:46,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 14:39:46,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:46,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:46,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:46,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:46,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:46,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:39:46,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:46,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:46,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:46,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:46,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:39:46,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:39:46,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:39:46,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:46,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:46,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-27 14:39:46,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:46,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:46,209 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 14:39:46,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [651029364] [2020-10-27 14:39:46,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:39:46,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 14:39:46,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119748510] [2020-10-27 14:39:46,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 14:39:46,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:39:46,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 14:39:46,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 14:39:46,245 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 3 states. [2020-10-27 14:39:46,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:39:46,447 INFO L93 Difference]: Finished difference Result 81 states and 109 transitions. [2020-10-27 14:39:46,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 14:39:46,452 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-10-27 14:39:46,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:39:46,470 INFO L225 Difference]: With dead ends: 81 [2020-10-27 14:39:46,470 INFO L226 Difference]: Without dead ends: 37 [2020-10-27 14:39:46,475 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 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 14:39:46,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-27 14:39:46,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-27 14:39:46,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-27 14:39:46,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2020-10-27 14:39:46,546 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 30 [2020-10-27 14:39:46,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:39:46,547 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2020-10-27 14:39:46,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 14:39:46,547 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2020-10-27 14:39:46,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 14:39:46,549 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:39:46,549 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:39:46,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 14:39:46,551 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:39:46,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:39:46,555 INFO L82 PathProgramCache]: Analyzing trace with hash -961350168, now seen corresponding path program 1 times [2020-10-27 14:39:46,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:39:46,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [338974301] [2020-10-27 14:39:46,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:39:46,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:46,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:46,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:46,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:46,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:46,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:46,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:48,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:51,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:51,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 14:39:51,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 14:39:51,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 14:39:51,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:51,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 14:39:51,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:39:51,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 14:39:51,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:51,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:39:51,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:51,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:51,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:51,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:39:51,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:51,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 14:39:51,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:51,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:51,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:51,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:51,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:51,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:39:51,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:51,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:51,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:51,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:39:51,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:51,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 14:39:51,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:51,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:39:51,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:51,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:39:51,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:51,734 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 14:39:51,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [338974301] [2020-10-27 14:39:51,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:39:51,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 14:39:51,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745780033] [2020-10-27 14:39:51,738 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 14:39:51,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:39:51,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 14:39:51,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:39:51,743 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 5 states. [2020-10-27 14:39:51,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:39:51,985 INFO L93 Difference]: Finished difference Result 65 states and 80 transitions. [2020-10-27 14:39:51,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 14:39:51,986 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-10-27 14:39:51,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:39:51,987 INFO L225 Difference]: With dead ends: 65 [2020-10-27 14:39:51,987 INFO L226 Difference]: Without dead ends: 43 [2020-10-27 14:39:51,988 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:39:51,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-27 14:39:51,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-27 14:39:51,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-27 14:39:51,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2020-10-27 14:39:52,001 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 30 [2020-10-27 14:39:52,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:39:52,002 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2020-10-27 14:39:52,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 14:39:52,002 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2020-10-27 14:39:52,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 14:39:52,006 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:39:52,007 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:39:52,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 14:39:52,007 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:39:52,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:39:52,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1706440668, now seen corresponding path program 1 times [2020-10-27 14:39:52,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:39:52,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [363881048] [2020-10-27 14:39:52,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:39:52,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:52,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:52,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:52,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:53,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:55,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:55,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:55,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:56,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:56,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:56,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:57,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:57,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 14:39:57,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 14:39:57,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 14:39:57,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:57,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 14:39:57,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:39:57,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 14:39:57,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:57,594 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2020-10-27 14:39:58,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:39:58,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:58,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:58,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:58,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:39:58,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:58,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:39:58,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:58,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:58,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:58,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:58,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:58,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:39:58,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:58,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:58,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:58,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:39:58,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:58,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:39:58,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:58,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:58,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:58,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:58,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:58,311 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:39:58,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [363881048] [2020-10-27 14:39:58,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:39:58,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 14:39:58,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904825951] [2020-10-27 14:39:58,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 14:39:58,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:39:58,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 14:39:58,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:39:58,319 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand 21 states. [2020-10-27 14:40:00,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:40:00,139 INFO L93 Difference]: Finished difference Result 78 states and 89 transitions. [2020-10-27 14:40:00,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 14:40:00,142 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 42 [2020-10-27 14:40:00,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:40:00,144 INFO L225 Difference]: With dead ends: 78 [2020-10-27 14:40:00,144 INFO L226 Difference]: Without dead ends: 71 [2020-10-27 14:40:00,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=160, Invalid=1030, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 14:40:00,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-27 14:40:00,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 64. [2020-10-27 14:40:00,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-27 14:40:00,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2020-10-27 14:40:00,163 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 42 [2020-10-27 14:40:00,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:40:00,164 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2020-10-27 14:40:00,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 14:40:00,164 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2020-10-27 14:40:00,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-27 14:40:00,166 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:40:00,166 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:40:00,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 14:40:00,166 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:40:00,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:40:00,167 INFO L82 PathProgramCache]: Analyzing trace with hash 406539258, now seen corresponding path program 2 times [2020-10-27 14:40:00,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:40:00,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [391464160] [2020-10-27 14:40:00,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:40:00,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:00,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:00,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:00,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:00,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:00,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:05,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:05,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 14:40:05,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:40:05,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-27 14:40:05,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:05,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 14:40:05,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-27 14:40:05,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 14:40:05,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:05,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:40:05,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:05,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:05,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:05,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:40:05,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:40:05,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:40:05,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:05,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:40:05,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:40:05,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:40:05,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:05,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:40:05,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:05,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:05,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:05,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:40:05,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:40:05,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:40:05,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:05,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:40:05,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:40:05,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:40:05,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:05,299 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 14:40:05,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [391464160] [2020-10-27 14:40:05,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:40:05,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 14:40:05,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150311994] [2020-10-27 14:40:05,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 14:40:05,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:40:05,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 14:40:05,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:40:05,302 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand 8 states. [2020-10-27 14:40:05,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:40:05,609 INFO L93 Difference]: Finished difference Result 142 states and 167 transitions. [2020-10-27 14:40:05,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 14:40:05,610 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 44 [2020-10-27 14:40:05,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:40:05,611 INFO L225 Difference]: With dead ends: 142 [2020-10-27 14:40:05,611 INFO L226 Difference]: Without dead ends: 84 [2020-10-27 14:40:05,612 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:40:05,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-27 14:40:05,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 69. [2020-10-27 14:40:05,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-27 14:40:05,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 78 transitions. [2020-10-27 14:40:05,625 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 78 transitions. Word has length 44 [2020-10-27 14:40:05,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:40:05,625 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 78 transitions. [2020-10-27 14:40:05,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 14:40:05,626 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 78 transitions. [2020-10-27 14:40:05,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-27 14:40:05,627 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:40:05,627 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:40:05,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 14:40:05,628 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:40:05,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:40:05,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1239192262, now seen corresponding path program 3 times [2020-10-27 14:40:05,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:40:05,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1830712768] [2020-10-27 14:40:05,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:40:05,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:05,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:05,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:05,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:05,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:06,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:10,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:10,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 14:40:10,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:40:10,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 14:40:10,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:10,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 14:40:10,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:40:10,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 14:40:10,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:10,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:40:10,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:10,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:10,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:10,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:40:10,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:40:10,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:40:10,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:10,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:40:10,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:40:10,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:40:10,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:10,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:40:10,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:10,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:10,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:10,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:40:10,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:40:10,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:40:10,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:10,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:40:10,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:40:10,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:40:10,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:10,757 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 14:40:10,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1830712768] [2020-10-27 14:40:10,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:40:10,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 14:40:10,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546545671] [2020-10-27 14:40:10,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 14:40:10,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:40:10,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 14:40:10,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:40:10,760 INFO L87 Difference]: Start difference. First operand 69 states and 78 transitions. Second operand 8 states. [2020-10-27 14:40:11,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:40:11,075 INFO L93 Difference]: Finished difference Result 78 states and 87 transitions. [2020-10-27 14:40:11,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 14:40:11,075 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 44 [2020-10-27 14:40:11,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:40:11,076 INFO L225 Difference]: With dead ends: 78 [2020-10-27 14:40:11,077 INFO L226 Difference]: Without dead ends: 55 [2020-10-27 14:40:11,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:40:11,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-27 14:40:11,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-27 14:40:11,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-27 14:40:11,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2020-10-27 14:40:11,096 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 44 [2020-10-27 14:40:11,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:40:11,098 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2020-10-27 14:40:11,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 14:40:11,098 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2020-10-27 14:40:11,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 14:40:11,099 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:40:11,099 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:40:11,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 14:40:11,100 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:40:11,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:40:11,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1102906416, now seen corresponding path program 4 times [2020-10-27 14:40:11,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:40:11,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [130538380] [2020-10-27 14:40:11,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:40:11,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:11,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:11,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:12,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:13,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:13,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:16,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:16,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:16,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 14:40:16,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:40:16,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5274 [2020-10-27 14:40:16,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:16,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 14:40:16,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:40:16,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 14:40:16,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:17,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:40:17,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:17,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:17,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:17,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:40:17,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:40:17,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:40:17,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:17,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:40:17,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:40:17,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:40:17,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:17,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:40:17,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:17,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:17,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:17,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:40:17,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:40:17,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:40:17,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:17,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:40:17,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:40:17,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:40:17,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:17,925 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:40:17,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [130538380] [2020-10-27 14:40:17,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:40:17,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 14:40:17,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522813606] [2020-10-27 14:40:17,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 14:40:17,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:40:17,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 14:40:17,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=917, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 14:40:17,928 INFO L87 Difference]: Start difference. First operand 55 states and 60 transitions. Second operand 33 states. [2020-10-27 14:40:20,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:40:20,720 INFO L93 Difference]: Finished difference Result 97 states and 107 transitions. [2020-10-27 14:40:20,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-27 14:40:20,721 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 54 [2020-10-27 14:40:20,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:40:20,723 INFO L225 Difference]: With dead ends: 97 [2020-10-27 14:40:20,723 INFO L226 Difference]: Without dead ends: 90 [2020-10-27 14:40:20,725 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=395, Invalid=2797, Unknown=0, NotChecked=0, Total=3192 [2020-10-27 14:40:20,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-27 14:40:20,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 78. [2020-10-27 14:40:20,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-27 14:40:20,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 87 transitions. [2020-10-27 14:40:20,738 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 87 transitions. Word has length 54 [2020-10-27 14:40:20,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:40:20,739 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 87 transitions. [2020-10-27 14:40:20,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 14:40:20,739 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 87 transitions. [2020-10-27 14:40:20,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 14:40:20,740 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:40:20,740 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:40:20,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 14:40:20,741 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:40:20,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:40:20,741 INFO L82 PathProgramCache]: Analyzing trace with hash -2136546578, now seen corresponding path program 5 times [2020-10-27 14:40:20,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:40:20,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1883724088] [2020-10-27 14:40:20,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:40:20,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:20,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:20,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:20,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:20,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:21,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:25,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:25,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 14:40:25,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:40:25,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-27 14:40:25,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:25,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:40:25,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-27 14:40:25,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 14:40:25,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:25,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:40:25,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:25,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:25,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:25,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:40:25,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:40:25,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:40:25,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:25,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:40:25,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:40:25,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:40:25,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:25,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:40:25,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:25,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:25,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:25,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:40:25,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:40:25,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:40:25,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:25,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:40:25,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:40:25,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:40:25,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:25,903 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-27 14:40:25,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1883724088] [2020-10-27 14:40:25,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:40:25,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 14:40:25,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140498261] [2020-10-27 14:40:25,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:40:25,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:40:25,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:40:25,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:40:25,906 INFO L87 Difference]: Start difference. First operand 78 states and 87 transitions. Second operand 10 states. [2020-10-27 14:40:26,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:40:26,320 INFO L93 Difference]: Finished difference Result 166 states and 188 transitions. [2020-10-27 14:40:26,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 14:40:26,320 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 56 [2020-10-27 14:40:26,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:40:26,322 INFO L225 Difference]: With dead ends: 166 [2020-10-27 14:40:26,322 INFO L226 Difference]: Without dead ends: 98 [2020-10-27 14:40:26,326 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:40:26,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-27 14:40:26,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 83. [2020-10-27 14:40:26,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-27 14:40:26,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2020-10-27 14:40:26,357 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 56 [2020-10-27 14:40:26,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:40:26,357 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2020-10-27 14:40:26,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:40:26,357 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2020-10-27 14:40:26,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 14:40:26,362 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:40:26,362 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:40:26,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 14:40:26,363 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:40:26,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:40:26,364 INFO L82 PathProgramCache]: Analyzing trace with hash 958430412, now seen corresponding path program 6 times [2020-10-27 14:40:26,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:40:26,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2071601649] [2020-10-27 14:40:26,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:40:26,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:26,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:26,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:26,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:26,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:27,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:29,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:29,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:31,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:31,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 14:40:31,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 14:40:31,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 14:40:31,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:31,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:40:31,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 14:40:31,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 14:40:31,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:31,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:40:31,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:31,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:31,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:31,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:40:31,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:40:31,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:40:31,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:31,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:40:31,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:40:31,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:40:31,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:31,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:40:31,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:31,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:31,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:31,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:40:31,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:40:31,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:40:31,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:31,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:40:31,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:40:31,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:40:31,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:31,502 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-27 14:40:31,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2071601649] [2020-10-27 14:40:31,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:40:31,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 14:40:31,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422989655] [2020-10-27 14:40:31,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:40:31,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:40:31,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:40:31,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:40:31,505 INFO L87 Difference]: Start difference. First operand 83 states and 91 transitions. Second operand 10 states. [2020-10-27 14:40:31,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:40:31,917 INFO L93 Difference]: Finished difference Result 92 states and 100 transitions. [2020-10-27 14:40:31,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 14:40:31,918 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 58 [2020-10-27 14:40:31,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:40:31,919 INFO L225 Difference]: With dead ends: 92 [2020-10-27 14:40:31,919 INFO L226 Difference]: Without dead ends: 67 [2020-10-27 14:40:31,921 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:40:31,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-27 14:40:31,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-27 14:40:31,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-27 14:40:31,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 72 transitions. [2020-10-27 14:40:31,945 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 72 transitions. Word has length 58 [2020-10-27 14:40:31,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:40:31,946 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 72 transitions. [2020-10-27 14:40:31,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:40:31,946 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 72 transitions. [2020-10-27 14:40:31,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 14:40:31,948 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:40:31,948 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:40:31,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 14:40:31,949 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:40:31,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:40:31,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1203093052, now seen corresponding path program 7 times [2020-10-27 14:40:31,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:40:31,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [692989716] [2020-10-27 14:40:31,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:40:32,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:32,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:32,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:34,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:37,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:37,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 14:40:37,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:40:37,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:40:37,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:37,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-27 14:40:37,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:40:37,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 14:40:37,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:37,840 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 48 [2020-10-27 14:40:38,969 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 47 [2020-10-27 14:40:40,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:40:40,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:40,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:40,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:40,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:40:40,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:40:40,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:40:40,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:40,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:40:40,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:40:40,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:40:40,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:40,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:40:40,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:40,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:40,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:40,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:40:40,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:40:40,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:40:40,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:40,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:40:40,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:40:40,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:40:40,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:40,839 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:40:40,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [692989716] [2020-10-27 14:40:40,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:40:40,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-27 14:40:40,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402242350] [2020-10-27 14:40:40,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-27 14:40:40,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:40:40,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-27 14:40:40,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1562, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 14:40:40,843 INFO L87 Difference]: Start difference. First operand 67 states and 72 transitions. Second operand 42 states. [2020-10-27 14:40:44,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:40:44,375 INFO L93 Difference]: Finished difference Result 111 states and 120 transitions. [2020-10-27 14:40:44,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-27 14:40:44,376 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 66 [2020-10-27 14:40:44,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:40:44,378 INFO L225 Difference]: With dead ends: 111 [2020-10-27 14:40:44,378 INFO L226 Difference]: Without dead ends: 104 [2020-10-27 14:40:44,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=325, Invalid=3835, Unknown=0, NotChecked=0, Total=4160 [2020-10-27 14:40:44,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-27 14:40:44,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 96. [2020-10-27 14:40:44,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-27 14:40:44,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 105 transitions. [2020-10-27 14:40:44,401 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 105 transitions. Word has length 66 [2020-10-27 14:40:44,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:40:44,401 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 105 transitions. [2020-10-27 14:40:44,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-27 14:40:44,401 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 105 transitions. [2020-10-27 14:40:44,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 14:40:44,403 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:40:44,403 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:40:44,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 14:40:44,406 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:40:44,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:40:44,407 INFO L82 PathProgramCache]: Analyzing trace with hash 368344034, now seen corresponding path program 8 times [2020-10-27 14:40:44,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:40:44,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [665417488] [2020-10-27 14:40:44,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:40:44,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:44,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:44,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:44,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:44,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:45,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:49,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:49,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 14:40:49,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:40:49,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:40:49,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:49,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:40:49,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-10-27 14:40:49,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 14:40:49,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:49,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:40:49,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:49,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:49,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:49,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:40:49,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:40:49,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:40:49,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:49,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:40:49,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:40:49,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:40:49,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:49,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:40:49,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:49,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:49,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:49,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:40:49,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:40:49,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:40:49,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:49,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:40:49,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:40:49,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:40:49,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:49,561 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-27 14:40:49,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [665417488] [2020-10-27 14:40:49,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:40:49,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:40:49,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716032804] [2020-10-27 14:40:49,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:40:49,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:40:49,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:40:49,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:40:49,566 INFO L87 Difference]: Start difference. First operand 96 states and 105 transitions. Second operand 12 states. [2020-10-27 14:40:50,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:40:50,154 INFO L93 Difference]: Finished difference Result 218 states and 242 transitions. [2020-10-27 14:40:50,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 14:40:50,155 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 68 [2020-10-27 14:40:50,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:40:50,158 INFO L225 Difference]: With dead ends: 218 [2020-10-27 14:40:50,158 INFO L226 Difference]: Without dead ends: 116 [2020-10-27 14:40:50,160 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:40:50,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-27 14:40:50,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 101. [2020-10-27 14:40:50,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-27 14:40:50,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 109 transitions. [2020-10-27 14:40:50,189 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 109 transitions. Word has length 68 [2020-10-27 14:40:50,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:40:50,189 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 109 transitions. [2020-10-27 14:40:50,189 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:40:50,189 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 109 transitions. [2020-10-27 14:40:50,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-27 14:40:50,195 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:40:50,200 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:40:50,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 14:40:50,200 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:40:50,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:40:50,201 INFO L82 PathProgramCache]: Analyzing trace with hash 540219584, now seen corresponding path program 9 times [2020-10-27 14:40:50,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:40:50,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [702734638] [2020-10-27 14:40:50,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:40:50,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:50,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:50,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:50,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:50,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:50,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:55,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:55,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 14:40:55,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:40:55,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 14:40:55,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:55,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:40:55,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-27 14:40:55,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 14:40:55,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:55,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:40:55,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:55,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:55,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:55,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:40:55,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:40:55,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:40:55,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:55,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:40:55,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:40:55,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:40:55,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:55,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:40:55,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:55,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:55,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:55,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:40:55,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:40:55,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:40:55,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:55,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:40:55,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:40:55,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:40:55,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:40:55,370 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2020-10-27 14:40:55,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [702734638] [2020-10-27 14:40:55,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:40:55,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:40:55,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717915172] [2020-10-27 14:40:55,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:40:55,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:40:55,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:40:55,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:40:55,373 INFO L87 Difference]: Start difference. First operand 101 states and 109 transitions. Second operand 12 states. [2020-10-27 14:40:56,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:40:56,065 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2020-10-27 14:40:56,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 14:40:56,066 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 70 [2020-10-27 14:40:56,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:40:56,068 INFO L225 Difference]: With dead ends: 110 [2020-10-27 14:40:56,068 INFO L226 Difference]: Without dead ends: 79 [2020-10-27 14:40:56,069 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:40:56,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-27 14:40:56,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-10-27 14:40:56,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-27 14:40:56,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 84 transitions. [2020-10-27 14:40:56,093 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 84 transitions. Word has length 70 [2020-10-27 14:40:56,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:40:56,096 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 84 transitions. [2020-10-27 14:40:56,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:40:56,096 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 84 transitions. [2020-10-27 14:40:56,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-27 14:40:56,105 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:40:56,106 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:40:56,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 14:40:56,106 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:40:56,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:40:56,108 INFO L82 PathProgramCache]: Analyzing trace with hash 2000488888, now seen corresponding path program 10 times [2020-10-27 14:40:56,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:40:56,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1683919788] [2020-10-27 14:40:56,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:40:56,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:56,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:57,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:00,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:02,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:02,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-27 14:41:02,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:41:02,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6158 [2020-10-27 14:41:02,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:02,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-27 14:41:02,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:41:02,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 14:41:02,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:03,634 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2020-10-27 14:41:03,798 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2020-10-27 14:41:03,946 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2020-10-27 14:41:04,111 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2020-10-27 14:41:04,268 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2020-10-27 14:41:05,097 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2020-10-27 14:41:05,421 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2020-10-27 14:41:05,606 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2020-10-27 14:41:05,805 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2020-10-27 14:41:05,981 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2020-10-27 14:41:06,429 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2020-10-27 14:41:09,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:41:09,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:09,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:09,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:09,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:41:09,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:41:09,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:41:09,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:09,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:41:09,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:41:09,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:41:09,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:09,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:41:09,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:09,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:09,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:09,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:41:09,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:41:09,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:41:09,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:09,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:41:09,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:41:09,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:41:09,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:09,341 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:41:09,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1683919788] [2020-10-27 14:41:09,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:41:09,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-27 14:41:09,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80939335] [2020-10-27 14:41:09,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-27 14:41:09,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:41:09,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-27 14:41:09,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=3000, Unknown=0, NotChecked=0, Total=3192 [2020-10-27 14:41:09,345 INFO L87 Difference]: Start difference. First operand 79 states and 84 transitions. Second operand 57 states. [2020-10-27 14:41:11,662 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 50 [2020-10-27 14:41:11,986 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 70 [2020-10-27 14:41:12,470 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 70 [2020-10-27 14:41:12,816 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 67 [2020-10-27 14:41:13,554 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2020-10-27 14:41:16,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:41:16,777 INFO L93 Difference]: Finished difference Result 134 states and 144 transitions. [2020-10-27 14:41:16,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-27 14:41:16,778 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 78 [2020-10-27 14:41:16,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:41:16,780 INFO L225 Difference]: With dead ends: 134 [2020-10-27 14:41:16,780 INFO L226 Difference]: Without dead ends: 127 [2020-10-27 14:41:16,784 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1659 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=424, Invalid=6716, Unknown=0, NotChecked=0, Total=7140 [2020-10-27 14:41:16,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-27 14:41:16,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 114. [2020-10-27 14:41:16,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-27 14:41:16,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 123 transitions. [2020-10-27 14:41:16,801 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 123 transitions. Word has length 78 [2020-10-27 14:41:16,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:41:16,801 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 123 transitions. [2020-10-27 14:41:16,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-27 14:41:16,801 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 123 transitions. [2020-10-27 14:41:16,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-27 14:41:16,802 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:41:16,802 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:41:16,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 14:41:16,803 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:41:16,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:41:16,804 INFO L82 PathProgramCache]: Analyzing trace with hash -480962858, now seen corresponding path program 11 times [2020-10-27 14:41:16,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:41:16,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [958628171] [2020-10-27 14:41:16,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:41:16,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:16,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:16,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:16,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:16,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:21,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:21,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-27 14:41:21,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:41:21,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-27 14:41:21,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:21,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:41:21,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-27 14:41:21,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 14:41:21,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:21,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:41:21,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:21,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:22,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:22,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:41:22,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:41:22,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:41:22,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:22,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:41:22,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:41:22,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:41:22,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:22,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:41:22,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:22,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:22,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:22,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:41:22,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:41:22,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:41:22,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:22,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:41:22,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:41:22,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:41:22,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:22,028 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-27 14:41:22,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [958628171] [2020-10-27 14:41:22,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:41:22,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:41:22,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754642743] [2020-10-27 14:41:22,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:41:22,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:41:22,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:41:22,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:41:22,036 INFO L87 Difference]: Start difference. First operand 114 states and 123 transitions. Second operand 14 states. [2020-10-27 14:41:22,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:41:22,876 INFO L93 Difference]: Finished difference Result 238 states and 260 transitions. [2020-10-27 14:41:22,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 14:41:22,876 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 80 [2020-10-27 14:41:22,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:41:22,878 INFO L225 Difference]: With dead ends: 238 [2020-10-27 14:41:22,878 INFO L226 Difference]: Without dead ends: 134 [2020-10-27 14:41:22,879 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:41:22,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-27 14:41:22,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 119. [2020-10-27 14:41:22,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-27 14:41:22,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 127 transitions. [2020-10-27 14:41:22,895 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 127 transitions. Word has length 80 [2020-10-27 14:41:22,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:41:22,895 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 127 transitions. [2020-10-27 14:41:22,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:41:22,896 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 127 transitions. [2020-10-27 14:41:22,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-27 14:41:22,897 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:41:22,897 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:41:22,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 14:41:22,897 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:41:22,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:41:22,898 INFO L82 PathProgramCache]: Analyzing trace with hash -613140812, now seen corresponding path program 12 times [2020-10-27 14:41:22,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:41:22,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2113991762] [2020-10-27 14:41:22,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:41:22,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:22,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:22,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:23,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:23,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:24,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:27,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:27,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-27 14:41:27,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:41:27,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 14:41:27,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:27,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:41:27,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-27 14:41:27,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 14:41:27,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:28,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:41:28,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:28,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:28,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:28,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:41:28,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:41:28,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:41:28,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:28,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:41:28,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:41:28,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:41:28,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:28,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:41:28,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:28,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:28,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:28,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:41:28,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:41:28,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:41:28,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:28,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:41:28,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:41:28,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:41:28,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:28,118 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-10-27 14:41:28,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2113991762] [2020-10-27 14:41:28,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:41:28,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:41:28,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756522904] [2020-10-27 14:41:28,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:41:28,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:41:28,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:41:28,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:41:28,122 INFO L87 Difference]: Start difference. First operand 119 states and 127 transitions. Second operand 14 states. [2020-10-27 14:41:28,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:41:28,769 INFO L93 Difference]: Finished difference Result 128 states and 136 transitions. [2020-10-27 14:41:28,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 14:41:28,770 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 82 [2020-10-27 14:41:28,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:41:28,772 INFO L225 Difference]: With dead ends: 128 [2020-10-27 14:41:28,772 INFO L226 Difference]: Without dead ends: 91 [2020-10-27 14:41:28,773 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:41:28,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-27 14:41:28,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2020-10-27 14:41:28,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-27 14:41:28,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 96 transitions. [2020-10-27 14:41:28,786 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 96 transitions. Word has length 82 [2020-10-27 14:41:28,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:41:28,786 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 96 transitions. [2020-10-27 14:41:28,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:41:28,786 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 96 transitions. [2020-10-27 14:41:28,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-27 14:41:28,787 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:41:28,787 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:41:28,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 14:41:28,788 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:41:28,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:41:28,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1510757292, now seen corresponding path program 13 times [2020-10-27 14:41:28,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:41:28,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [414495390] [2020-10-27 14:41:28,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:41:28,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:28,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:30,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:33,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:33,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-27 14:41:33,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:41:33,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-27 14:41:33,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:33,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 67 [2020-10-27 14:41:33,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:41:33,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-27 14:41:33,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:34,924 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2020-10-27 14:41:35,451 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 56 [2020-10-27 14:41:35,610 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 48 [2020-10-27 14:41:35,803 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 53 [2020-10-27 14:41:36,121 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 48 [2020-10-27 14:41:36,447 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 44 [2020-10-27 14:41:37,652 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 43 [2020-10-27 14:41:37,863 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 44 [2020-10-27 14:41:38,093 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 52 [2020-10-27 14:41:38,351 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 52 [2020-10-27 14:41:38,615 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 52 [2020-10-27 14:41:38,872 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 53 [2020-10-27 14:41:39,166 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 61 [2020-10-27 14:41:39,421 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 55 [2020-10-27 14:41:39,733 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 62 [2020-10-27 14:41:39,953 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2020-10-27 14:41:40,183 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2020-10-27 14:41:40,493 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 59 [2020-10-27 14:41:40,718 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2020-10-27 14:41:40,981 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 53 [2020-10-27 14:41:41,184 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 45 [2020-10-27 14:41:41,414 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2020-10-27 14:41:45,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:41:45,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:45,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:45,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:45,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:41:45,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:41:45,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:41:45,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:45,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:41:45,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:41:45,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:41:45,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:45,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:41:45,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:45,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:45,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:45,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:41:45,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:41:45,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:41:45,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:45,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:41:45,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:41:45,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:41:45,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:45,802 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:41:45,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [414495390] [2020-10-27 14:41:45,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:41:45,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2020-10-27 14:41:45,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524894696] [2020-10-27 14:41:45,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-10-27 14:41:45,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:41:45,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-10-27 14:41:45,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=389, Invalid=4303, Unknown=0, NotChecked=0, Total=4692 [2020-10-27 14:41:45,806 INFO L87 Difference]: Start difference. First operand 91 states and 96 transitions. Second operand 69 states. [2020-10-27 14:41:47,727 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 49 [2020-10-27 14:41:48,213 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 56 [2020-10-27 14:41:48,929 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 107 [2020-10-27 14:41:49,311 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2020-10-27 14:41:50,173 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 115 [2020-10-27 14:41:50,543 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 54 [2020-10-27 14:41:50,863 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 65 [2020-10-27 14:41:51,189 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 48 [2020-10-27 14:41:51,433 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 50 [2020-10-27 14:41:51,770 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 50 [2020-10-27 14:41:52,011 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2020-10-27 14:41:52,330 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 43 [2020-10-27 14:41:52,855 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 46 [2020-10-27 14:41:53,294 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 38 [2020-10-27 14:41:54,294 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 80 [2020-10-27 14:41:54,754 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 69 [2020-10-27 14:41:55,385 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 85 [2020-10-27 14:41:56,852 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 68 [2020-10-27 14:41:57,504 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 63 [2020-10-27 14:41:57,772 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2020-10-27 14:41:58,733 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 99 [2020-10-27 14:41:58,975 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-10-27 14:42:02,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:42:02,284 INFO L93 Difference]: Finished difference Result 167 states and 178 transitions. [2020-10-27 14:42:02,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2020-10-27 14:42:02,285 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 90 [2020-10-27 14:42:02,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:42:02,287 INFO L225 Difference]: With dead ends: 167 [2020-10-27 14:42:02,287 INFO L226 Difference]: Without dead ends: 160 [2020-10-27 14:42:02,293 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4426 ImplicationChecksByTransitivity, 22.9s TimeCoverageRelationStatistics Valid=1330, Invalid=14672, Unknown=0, NotChecked=0, Total=16002 [2020-10-27 14:42:02,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-27 14:42:02,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 132. [2020-10-27 14:42:02,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-27 14:42:02,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 141 transitions. [2020-10-27 14:42:02,309 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 141 transitions. Word has length 90 [2020-10-27 14:42:02,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:42:02,309 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 141 transitions. [2020-10-27 14:42:02,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-10-27 14:42:02,309 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 141 transitions. [2020-10-27 14:42:02,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-27 14:42:02,310 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:42:02,310 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:42:02,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 14:42:02,310 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:42:02,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:42:02,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1333375946, now seen corresponding path program 14 times [2020-10-27 14:42:02,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:42:02,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1103630785] [2020-10-27 14:42:02,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:42:02,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:02,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:02,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:02,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:02,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:07,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:07,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-27 14:42:07,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:42:07,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-27 14:42:07,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:07,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:42:07,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 56 [2020-10-27 14:42:07,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 14:42:07,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:07,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:42:07,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:07,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:07,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:07,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:42:07,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:42:07,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:42:07,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:07,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:42:07,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:42:07,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:42:07,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:07,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:42:07,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:07,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:07,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:07,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:42:07,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:42:07,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:42:07,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:07,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:42:07,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:42:07,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:42:07,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:07,609 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-27 14:42:07,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1103630785] [2020-10-27 14:42:07,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:42:07,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:42:07,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44588777] [2020-10-27 14:42:07,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:42:07,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:42:07,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:42:07,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:42:07,620 INFO L87 Difference]: Start difference. First operand 132 states and 141 transitions. Second operand 16 states. [2020-10-27 14:42:08,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:42:08,737 INFO L93 Difference]: Finished difference Result 298 states and 322 transitions. [2020-10-27 14:42:08,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 14:42:08,738 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 92 [2020-10-27 14:42:08,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:42:08,739 INFO L225 Difference]: With dead ends: 298 [2020-10-27 14:42:08,740 INFO L226 Difference]: Without dead ends: 152 [2020-10-27 14:42:08,741 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:42:08,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-27 14:42:08,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 137. [2020-10-27 14:42:08,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-27 14:42:08,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 145 transitions. [2020-10-27 14:42:08,761 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 145 transitions. Word has length 92 [2020-10-27 14:42:08,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:42:08,762 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 145 transitions. [2020-10-27 14:42:08,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:42:08,762 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 145 transitions. [2020-10-27 14:42:08,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-27 14:42:08,763 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:42:08,763 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:42:08,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 14:42:08,763 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:42:08,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:42:08,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1806379352, now seen corresponding path program 15 times [2020-10-27 14:42:08,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:42:08,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [55624395] [2020-10-27 14:42:08,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:42:08,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:08,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:08,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:08,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:08,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:13,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:13,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-27 14:42:13,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:42:13,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 14:42:13,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:13,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:42:13,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-27 14:42:13,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 14:42:13,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:13,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:42:13,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:13,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:13,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:13,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:42:14,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:42:14,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:42:14,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:14,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:42:14,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:42:14,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:42:14,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:14,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:42:14,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:14,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:14,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:14,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:42:14,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:42:14,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:42:14,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:14,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:42:14,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:42:14,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:42:14,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:14,013 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2020-10-27 14:42:14,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [55624395] [2020-10-27 14:42:14,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:42:14,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:42:14,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475329736] [2020-10-27 14:42:14,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:42:14,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:42:14,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:42:14,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:42:14,015 INFO L87 Difference]: Start difference. First operand 137 states and 145 transitions. Second operand 16 states. [2020-10-27 14:42:15,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:42:15,083 INFO L93 Difference]: Finished difference Result 146 states and 154 transitions. [2020-10-27 14:42:15,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 14:42:15,084 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 94 [2020-10-27 14:42:15,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:42:15,085 INFO L225 Difference]: With dead ends: 146 [2020-10-27 14:42:15,085 INFO L226 Difference]: Without dead ends: 103 [2020-10-27 14:42:15,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:42:15,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-27 14:42:15,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2020-10-27 14:42:15,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-27 14:42:15,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 108 transitions. [2020-10-27 14:42:15,099 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 108 transitions. Word has length 94 [2020-10-27 14:42:15,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:42:15,100 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 108 transitions. [2020-10-27 14:42:15,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:42:15,100 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 108 transitions. [2020-10-27 14:42:15,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-27 14:42:15,101 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:42:15,101 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:42:15,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 14:42:15,101 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:42:15,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:42:15,102 INFO L82 PathProgramCache]: Analyzing trace with hash -81191008, now seen corresponding path program 16 times [2020-10-27 14:42:15,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:42:15,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2064670828] [2020-10-27 14:42:15,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:42:15,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:15,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:19,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:22,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:22,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-27 14:42:22,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:42:22,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7768 [2020-10-27 14:42:22,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:22,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 79 [2020-10-27 14:42:22,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:42:22,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-27 14:42:22,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:24,331 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 49 [2020-10-27 14:42:24,479 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 49 [2020-10-27 14:42:24,656 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 50 [2020-10-27 14:42:24,831 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 50 [2020-10-27 14:42:25,001 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 55 [2020-10-27 14:42:25,166 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 55 [2020-10-27 14:42:25,318 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-10-27 14:42:25,481 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-10-27 14:42:25,733 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 65 [2020-10-27 14:42:26,007 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2020-10-27 14:42:26,285 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 60 [2020-10-27 14:42:26,517 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 59 [2020-10-27 14:42:26,757 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 63 [2020-10-27 14:42:26,950 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 56 [2020-10-27 14:42:27,154 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 52 [2020-10-27 14:42:27,330 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 46 [2020-10-27 14:42:27,578 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 49 [2020-10-27 14:42:27,785 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2020-10-27 14:42:27,983 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2020-10-27 14:42:28,669 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 40 [2020-10-27 14:42:28,878 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 34 [2020-10-27 14:42:29,122 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 43 [2020-10-27 14:42:29,415 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 48 [2020-10-27 14:42:29,711 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 48 [2020-10-27 14:42:30,023 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 52 [2020-10-27 14:42:30,322 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 52 [2020-10-27 14:42:30,784 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 60 [2020-10-27 14:42:31,165 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 55 [2020-10-27 14:42:31,492 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 55 [2020-10-27 14:42:31,839 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 50 [2020-10-27 14:42:32,274 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 63 [2020-10-27 14:42:32,665 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 57 [2020-10-27 14:42:33,108 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 63 [2020-10-27 14:42:33,476 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 54 [2020-10-27 14:42:33,882 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 53 [2020-10-27 14:42:34,329 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 52 [2020-10-27 14:42:34,718 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 51 [2020-10-27 14:42:35,088 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 49 [2020-10-27 14:42:35,481 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 53 [2020-10-27 14:42:35,804 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 45 [2020-10-27 14:42:36,208 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 53 [2020-10-27 14:42:36,690 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 34 [2020-10-27 14:42:36,940 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 35 [2020-10-27 14:42:37,296 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 44 [2020-10-27 14:42:37,607 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 43 [2020-10-27 14:42:37,961 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 48 [2020-10-27 14:42:38,297 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 48 [2020-10-27 14:42:38,671 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 44 [2020-10-27 14:42:39,003 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 43 [2020-10-27 14:42:39,446 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2020-10-27 14:42:39,819 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 55 [2020-10-27 14:42:40,202 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 52 [2020-10-27 14:42:40,530 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2020-10-27 14:42:40,923 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 60 [2020-10-27 14:42:41,253 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 52 [2020-10-27 14:42:41,591 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 54 [2020-10-27 14:42:41,860 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 48 [2020-10-27 14:42:42,176 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 49 [2020-10-27 14:42:42,740 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 47 [2020-10-27 14:42:44,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:42:44,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:44,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:44,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:44,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:42:44,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:42:44,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:42:44,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:44,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:42:44,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:42:44,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:42:44,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:44,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:42:44,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:44,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:44,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:44,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:42:44,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:42:44,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:42:44,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:44,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:42:44,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:42:44,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:42:44,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:44,443 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 20 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:42:44,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2064670828] [2020-10-27 14:42:44,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:42:44,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81] total 81 [2020-10-27 14:42:44,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048967980] [2020-10-27 14:42:44,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 81 states [2020-10-27 14:42:44,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:42:44,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2020-10-27 14:42:44,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=428, Invalid=6052, Unknown=0, NotChecked=0, Total=6480 [2020-10-27 14:42:44,447 INFO L87 Difference]: Start difference. First operand 103 states and 108 transitions. Second operand 81 states. [2020-10-27 14:42:44,821 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 5 [2020-10-27 14:42:45,367 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 36 [2020-10-27 14:42:48,772 WARN L193 SmtUtils]: Spent 922.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 133 [2020-10-27 14:42:49,247 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 90 [2020-10-27 14:42:49,838 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 93 [2020-10-27 14:42:50,606 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 94 [2020-10-27 14:42:51,211 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 97 [2020-10-27 14:42:51,851 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 105 [2020-10-27 14:42:52,427 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 97 [2020-10-27 14:42:52,977 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 93 [2020-10-27 14:42:53,512 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 91 [2020-10-27 14:42:54,047 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 91 [2020-10-27 14:42:54,570 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 91 [2020-10-27 14:42:55,042 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 92 [2020-10-27 14:42:55,701 WARN L193 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 106 [2020-10-27 14:42:56,198 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 71 [2020-10-27 14:42:57,173 WARN L193 SmtUtils]: Spent 659.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 106 [2020-10-27 14:42:57,610 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2020-10-27 14:42:58,010 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2020-10-27 14:42:58,452 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 67 [2020-10-27 14:42:58,978 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2020-10-27 14:42:59,762 WARN L193 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 96 [2020-10-27 14:43:00,430 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 80 [2020-10-27 14:43:01,162 WARN L193 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 95 [2020-10-27 14:43:01,864 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 90 [2020-10-27 14:43:02,464 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 82 [2020-10-27 14:43:03,110 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 80 [2020-10-27 14:43:03,697 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 81 [2020-10-27 14:43:04,264 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 78 [2020-10-27 14:43:04,762 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 73 [2020-10-27 14:43:05,284 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 75 [2020-10-27 14:43:05,754 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 70 [2020-10-27 14:43:06,240 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 71 [2020-10-27 14:43:06,680 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 72 [2020-10-27 14:43:07,092 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 67 [2020-10-27 14:43:07,664 WARN L193 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 90 [2020-10-27 14:43:07,970 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2020-10-27 14:43:08,239 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-10-27 14:43:08,549 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-27 14:43:08,870 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2020-10-27 14:43:09,270 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-27 14:43:09,643 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2020-10-27 14:43:10,058 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2020-10-27 14:43:10,476 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2020-10-27 14:43:10,880 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-27 14:43:11,246 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-27 14:43:11,740 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 86 [2020-10-27 14:43:12,318 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2020-10-27 14:43:12,829 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-10-27 14:43:13,350 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 82 [2020-10-27 14:43:13,876 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-10-27 14:43:14,287 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2020-10-27 14:43:14,841 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 93 [2020-10-27 14:43:15,374 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-10-27 14:43:16,489 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-10-27 14:43:16,853 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47