/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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/condm.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 09:14:12,061 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 09:14:12,063 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 09:14:12,098 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 09:14:12,099 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 09:14:12,101 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 09:14:12,102 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 09:14:12,105 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 09:14:12,107 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 09:14:12,108 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 09:14:12,110 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 09:14:12,111 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 09:14:12,111 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 09:14:12,113 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 09:14:12,114 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 09:14:12,115 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 09:14:12,116 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 09:14:12,117 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 09:14:12,119 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 09:14:12,137 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 09:14:12,139 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 09:14:12,145 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 09:14:12,146 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 09:14:12,147 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 09:14:12,150 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 09:14:12,150 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 09:14:12,151 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 09:14:12,152 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 09:14:12,152 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 09:14:12,153 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 09:14:12,154 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 09:14:12,155 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 09:14:12,155 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 09:14:12,156 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 09:14:12,157 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 09:14:12,158 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 09:14:12,158 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 09:14:12,159 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 09:14:12,159 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 09:14:12,160 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 09:14:12,161 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 09:14:12,163 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 [2020-10-28 09:14:12,190 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 09:14:12,190 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 09:14:12,192 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 09:14:12,192 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 09:14:12,192 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 09:14:12,193 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 09:14:12,193 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 09:14:12,193 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 09:14:12,193 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 09:14:12,193 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 09:14:12,193 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 09:14:12,194 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 09:14:12,194 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 09:14:12,194 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 09:14:12,194 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 09:14:12,194 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 09:14:12,195 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 09:14:12,195 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 09:14:12,195 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 09:14:12,195 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 09:14:12,195 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 09:14:12,196 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 09:14:12,196 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 09:14:12,196 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 09:14:12,196 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 09:14:12,196 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 09:14:12,197 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 09:14:12,197 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 09:14:12,197 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 09:14:12,197 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 09:14:12,594 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 09:14:12,625 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 09:14:12,629 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 09:14:12,630 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 09:14:12,631 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 09:14:12,633 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/condm.c [2020-10-28 09:14:12,716 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/732a830ff/7058768e923b47b782f2757d65d3aebf/FLAG5b93c2172 [2020-10-28 09:14:13,338 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 09:14:13,339 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/condm.c [2020-10-28 09:14:13,346 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/732a830ff/7058768e923b47b782f2757d65d3aebf/FLAG5b93c2172 [2020-10-28 09:14:13,705 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/732a830ff/7058768e923b47b782f2757d65d3aebf [2020-10-28 09:14:13,708 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 09:14:13,715 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 09:14:13,717 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 09:14:13,718 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 09:14:13,723 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 09:14:13,724 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:14:13" (1/1) ... [2020-10-28 09:14:13,730 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ebfc791 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:14:13, skipping insertion in model container [2020-10-28 09:14:13,730 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:14:13" (1/1) ... [2020-10-28 09:14:13,739 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 09:14:13,772 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 09:14:13,959 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 09:14:13,977 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 09:14:14,022 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 09:14:14,045 INFO L208 MainTranslator]: Completed translation [2020-10-28 09:14:14,045 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:14:14 WrapperNode [2020-10-28 09:14:14,046 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 09:14:14,047 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 09:14:14,048 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 09:14:14,048 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 09:14:14,065 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:14:14" (1/1) ... [2020-10-28 09:14:14,067 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:14:14" (1/1) ... [2020-10-28 09:14:14,091 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:14:14" (1/1) ... [2020-10-28 09:14:14,091 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:14:14" (1/1) ... [2020-10-28 09:14:14,114 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:14:14" (1/1) ... [2020-10-28 09:14:14,126 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:14:14" (1/1) ... [2020-10-28 09:14:14,129 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:14:14" (1/1) ... [2020-10-28 09:14:14,139 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 09:14:14,141 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 09:14:14,141 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 09:14:14,141 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 09:14:14,143 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:14:14" (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 [2020-10-28 09:14:14,248 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 09:14:14,248 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 09:14:14,248 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 09:14:14,249 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 09:14:14,250 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 09:14:14,250 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 09:14:14,251 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 09:14:14,252 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 09:14:14,252 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 09:14:14,252 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 09:14:14,253 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 09:14:14,254 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 09:14:14,254 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 09:14:14,254 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-28 09:14:14,255 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 09:14:14,256 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-28 09:14:14,256 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 09:14:14,257 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 09:14:14,257 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 09:14:14,257 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 09:14:14,258 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 09:14:14,258 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 09:14:14,693 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 09:14:14,693 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-28 09:14:14,696 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:14:14 BoogieIcfgContainer [2020-10-28 09:14:14,696 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 09:14:14,698 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 09:14:14,698 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 09:14:14,705 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 09:14:14,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 09:14:13" (1/3) ... [2020-10-28 09:14:14,710 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@206fe4ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:14:14, skipping insertion in model container [2020-10-28 09:14:14,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:14:14" (2/3) ... [2020-10-28 09:14:14,710 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@206fe4ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:14:14, skipping insertion in model container [2020-10-28 09:14:14,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:14:14" (3/3) ... [2020-10-28 09:14:14,716 INFO L111 eAbstractionObserver]: Analyzing ICFG condm.c [2020-10-28 09:14:14,754 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 09:14:14,759 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 09:14:14,775 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 09:14:14,807 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 09:14:14,808 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 09:14:14,808 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 09:14:14,808 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 09:14:14,808 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 09:14:14,809 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 09:14:14,809 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 09:14:14,809 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 09:14:14,830 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-10-28 09:14:14,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 09:14:14,838 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:14:14,839 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] [2020-10-28 09:14:14,840 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:14:14,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:14:14,848 INFO L82 PathProgramCache]: Analyzing trace with hash -603566119, now seen corresponding path program 1 times [2020-10-28 09:14:14,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:14:14,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [601510572] [2020-10-28 09:14:14,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:14:15,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:15,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:15,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:15,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:15,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:16,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:16,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 09:14:16,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:14:16,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1035 [2020-10-28 09:14:16,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:16,057 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:16,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:14:16,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-28 09:14:16,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:14:16,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-28 09:14:16,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:14:16,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:16,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:16,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:16,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:14:16,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:14:16,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 09:14:16,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:16,223 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:16,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:14:16,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:14:16,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:14:16,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 09:14:16,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:14:16,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:16,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:16,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:16,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:16,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:14:16,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:14:16,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 09:14:16,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:16,252 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:16,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:14:16,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-28 09:14:16,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:14:16,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:14:16,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:14:16,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [601510572] [2020-10-28 09:14:16,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:14:16,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 09:14:16,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005248054] [2020-10-28 09:14:16,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 09:14:16,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:14:16,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 09:14:16,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 09:14:16,297 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 3 states. [2020-10-28 09:14:16,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:14:16,458 INFO L93 Difference]: Finished difference Result 65 states and 83 transitions. [2020-10-28 09:14:16,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 09:14:16,460 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-10-28 09:14:16,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:14:16,469 INFO L225 Difference]: With dead ends: 65 [2020-10-28 09:14:16,469 INFO L226 Difference]: Without dead ends: 31 [2020-10-28 09:14:16,473 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 [2020-10-28 09:14:16,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-28 09:14:16,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-28 09:14:16,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-28 09:14:16,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2020-10-28 09:14:16,519 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 23 [2020-10-28 09:14:16,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:14:16,520 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2020-10-28 09:14:16,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 09:14:16,520 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2020-10-28 09:14:16,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 09:14:16,522 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:14:16,522 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] [2020-10-28 09:14:16,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 09:14:16,523 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:14:16,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:14:16,524 INFO L82 PathProgramCache]: Analyzing trace with hash 689239426, now seen corresponding path program 1 times [2020-10-28 09:14:16,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:14:16,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [358037113] [2020-10-28 09:14:16,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:14:16,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:16,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:16,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:16,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:16,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:17,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:17,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 09:14:17,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:14:17,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 770 [2020-10-28 09:14:17,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:17,318 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:17,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 09:14:17,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 09:14:17,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 09:14:17,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:14:17,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:14:17,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:17,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:17,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:17,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:14:17,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:14:17,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:14:17,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:17,391 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:17,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:14:17,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:14:17,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:14:17,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:14:17,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:14:17,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:17,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:17,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:17,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:14:17,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:14:17,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:14:17,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:17,404 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:17,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:14:17,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:14:17,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:14:17,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:14:17,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:14:17,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [358037113] [2020-10-28 09:14:17,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:14:17,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 09:14:17,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058658234] [2020-10-28 09:14:17,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 09:14:17,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:14:17,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 09:14:17,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 09:14:17,414 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 5 states. [2020-10-28 09:14:17,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:14:17,643 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2020-10-28 09:14:17,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 09:14:17,643 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-28 09:14:17,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:14:17,645 INFO L225 Difference]: With dead ends: 50 [2020-10-28 09:14:17,645 INFO L226 Difference]: Without dead ends: 34 [2020-10-28 09:14:17,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 09:14:17,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-28 09:14:17,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-10-28 09:14:17,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-28 09:14:17,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-10-28 09:14:17,656 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 23 [2020-10-28 09:14:17,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:14:17,656 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-10-28 09:14:17,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 09:14:17,657 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-10-28 09:14:17,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 09:14:17,658 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:14:17,658 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] [2020-10-28 09:14:17,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 09:14:17,658 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:14:17,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:14:17,659 INFO L82 PathProgramCache]: Analyzing trace with hash 493588519, now seen corresponding path program 1 times [2020-10-28 09:14:17,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:14:17,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1768333891] [2020-10-28 09:14:17,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:14:17,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:17,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:17,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:17,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:17,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:17,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:17,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:18,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:18,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:18,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:22,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:22,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 09:14:22,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 09:14:22,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4410 [2020-10-28 09:14:22,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:22,105 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:22,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 09:14:22,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 09:14:22,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 09:14:22,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:14:22,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:14:22,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:22,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:22,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:22,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:14:22,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:14:22,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:14:22,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:22,267 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:22,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:14:22,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:14:22,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:14:22,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:14:22,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:14:22,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:22,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:22,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:22,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:14:22,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:14:22,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:14:22,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:22,278 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:22,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:14:22,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:14:22,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:14:22,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:14:22,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 09:14:22,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1768333891] [2020-10-28 09:14:22,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:14:22,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 09:14:22,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148787518] [2020-10-28 09:14:22,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 09:14:22,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:14:22,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 09:14:22,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 09:14:22,301 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 7 states. [2020-10-28 09:14:22,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:14:22,561 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2020-10-28 09:14:22,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 09:14:22,562 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-10-28 09:14:22,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:14:22,565 INFO L225 Difference]: With dead ends: 56 [2020-10-28 09:14:22,565 INFO L226 Difference]: Without dead ends: 44 [2020-10-28 09:14:22,566 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:14:22,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-28 09:14:22,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 36. [2020-10-28 09:14:22,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-28 09:14:22,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-10-28 09:14:22,580 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 28 [2020-10-28 09:14:22,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:14:22,581 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-10-28 09:14:22,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 09:14:22,581 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-10-28 09:14:22,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 09:14:22,582 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:14:22,583 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] [2020-10-28 09:14:22,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 09:14:22,583 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:14:22,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:14:22,584 INFO L82 PathProgramCache]: Analyzing trace with hash 100561509, now seen corresponding path program 1 times [2020-10-28 09:14:22,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:14:22,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [747905225] [2020-10-28 09:14:22,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:14:22,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:22,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:22,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:22,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:23,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:23,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 09:14:23,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:14:23,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 919 [2020-10-28 09:14:23,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:23,527 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:23,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 09:14:23,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:14:23,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 09:14:23,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:14:23,737 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 26 [2020-10-28 09:14:24,053 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 26 [2020-10-28 09:14:24,262 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 28 [2020-10-28 09:14:24,438 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 22 [2020-10-28 09:14:24,616 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 18 [2020-10-28 09:14:24,823 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 24 [2020-10-28 09:14:25,069 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 21 [2020-10-28 09:14:25,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:14:25,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:25,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:25,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:25,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:14:25,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:14:25,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:14:25,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:25,156 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:25,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:14:25,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:14:25,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:14:25,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:14:25,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:14:25,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:25,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:25,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:25,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:14:25,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:14:25,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:14:25,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:25,162 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:25,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:14:25,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:14:25,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:14:25,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:14:25,168 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:14:25,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [747905225] [2020-10-28 09:14:25,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:14:25,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 09:14:25,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27275199] [2020-10-28 09:14:25,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 09:14:25,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:14:25,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 09:14:25,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-10-28 09:14:25,171 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 15 states. [2020-10-28 09:14:26,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:14:26,139 INFO L93 Difference]: Finished difference Result 79 states and 92 transitions. [2020-10-28 09:14:26,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 09:14:26,140 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2020-10-28 09:14:26,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:14:26,144 INFO L225 Difference]: With dead ends: 79 [2020-10-28 09:14:26,145 INFO L226 Difference]: Without dead ends: 62 [2020-10-28 09:14:26,146 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2020-10-28 09:14:26,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-28 09:14:26,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2020-10-28 09:14:26,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-28 09:14:26,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2020-10-28 09:14:26,170 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 28 [2020-10-28 09:14:26,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:14:26,170 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2020-10-28 09:14:26,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 09:14:26,170 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2020-10-28 09:14:26,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 09:14:26,174 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:14:26,174 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] [2020-10-28 09:14:26,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 09:14:26,174 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:14:26,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:14:26,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1678212733, now seen corresponding path program 2 times [2020-10-28 09:14:26,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:14:26,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1419710256] [2020-10-28 09:14:26,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:14:26,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:26,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:26,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:26,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:26,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:28,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:28,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-28 09:14:28,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:14:28,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2262 [2020-10-28 09:14:28,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:28,458 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:28,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 09:14:28,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:14:28,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 09:14:28,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:14:28,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:14:28,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:28,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:28,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:28,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:14:28,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:14:28,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:14:28,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:28,547 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:28,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:14:28,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:14:28,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:14:28,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:14:28,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:14:28,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:28,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:28,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:28,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:14:28,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:14:28,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:14:28,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:28,554 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:28,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:14:28,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:14:28,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:14:28,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:14:28,559 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:14:28,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1419710256] [2020-10-28 09:14:28,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:14:28,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 09:14:28,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623374876] [2020-10-28 09:14:28,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 09:14:28,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:14:28,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 09:14:28,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:14:28,564 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand 8 states. [2020-10-28 09:14:28,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:14:28,895 INFO L93 Difference]: Finished difference Result 73 states and 81 transitions. [2020-10-28 09:14:28,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 09:14:28,896 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-10-28 09:14:28,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:14:28,897 INFO L225 Difference]: With dead ends: 73 [2020-10-28 09:14:28,897 INFO L226 Difference]: Without dead ends: 61 [2020-10-28 09:14:28,898 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 [2020-10-28 09:14:28,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-28 09:14:28,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 51. [2020-10-28 09:14:28,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-28 09:14:28,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2020-10-28 09:14:28,909 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 30 [2020-10-28 09:14:28,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:14:28,910 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2020-10-28 09:14:28,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 09:14:28,910 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2020-10-28 09:14:28,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 09:14:28,911 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:14:28,911 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 09:14:28,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 09:14:28,911 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:14:28,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:14:28,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1080780804, now seen corresponding path program 3 times [2020-10-28 09:14:28,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:14:28,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1981875042] [2020-10-28 09:14:28,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:14:28,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:28,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:28,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:29,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:29,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:30,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:30,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:30,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:31,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:31,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 09:14:31,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 09:14:31,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2949 [2020-10-28 09:14:31,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:31,875 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:31,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 09:14:31,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:14:31,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 09:14:31,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:14:31,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:14:31,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:31,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:31,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:31,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:14:31,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:14:31,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:14:31,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:31,972 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:31,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:14:31,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:14:31,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:14:31,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:14:31,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:14:31,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:31,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:31,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:31,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:14:31,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:14:31,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:14:31,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:31,981 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:31,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:14:31,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:14:31,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:14:31,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:14:31,987 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:14:31,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1981875042] [2020-10-28 09:14:31,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:14:31,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 09:14:31,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337525551] [2020-10-28 09:14:31,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 09:14:31,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:14:31,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 09:14:31,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:14:31,991 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand 8 states. [2020-10-28 09:14:32,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:14:32,316 INFO L93 Difference]: Finished difference Result 80 states and 91 transitions. [2020-10-28 09:14:32,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 09:14:32,317 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-10-28 09:14:32,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:14:32,319 INFO L225 Difference]: With dead ends: 80 [2020-10-28 09:14:32,319 INFO L226 Difference]: Without dead ends: 49 [2020-10-28 09:14:32,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-28 09:14:32,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-28 09:14:32,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-10-28 09:14:32,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-28 09:14:32,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-10-28 09:14:32,336 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 31 [2020-10-28 09:14:32,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:14:32,338 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-10-28 09:14:32,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 09:14:32,338 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-10-28 09:14:32,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 09:14:32,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:14:32,339 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 09:14:32,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 09:14:32,339 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:14:32,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:14:32,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1903668454, now seen corresponding path program 2 times [2020-10-28 09:14:32,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:14:32,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1653616826] [2020-10-28 09:14:32,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:14:32,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:32,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:32,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:32,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:32,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-28 09:14:32,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:14:32,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 590 [2020-10-28 09:14:32,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:32,967 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:32,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 09:14:32,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:14:32,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 09:14:32,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:14:33,354 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 30 [2020-10-28 09:14:33,655 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 24 [2020-10-28 09:14:33,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:14:33,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:33,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:33,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:33,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:14:33,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:14:33,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:14:33,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:33,734 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:33,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:14:33,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:14:33,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:14:33,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:14:33,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:14:33,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:33,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:33,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:33,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:14:33,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:14:33,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:14:33,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:33,741 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:33,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:14:33,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:14:33,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:14:33,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:14:33,749 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:14:33,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1653616826] [2020-10-28 09:14:33,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:14:33,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 09:14:33,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777994071] [2020-10-28 09:14:33,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 09:14:33,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:14:33,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 09:14:33,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-28 09:14:33,752 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 11 states. [2020-10-28 09:14:34,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:14:34,392 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2020-10-28 09:14:34,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 09:14:34,393 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2020-10-28 09:14:34,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:14:34,395 INFO L225 Difference]: With dead ends: 72 [2020-10-28 09:14:34,395 INFO L226 Difference]: Without dead ends: 57 [2020-10-28 09:14:34,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2020-10-28 09:14:34,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-28 09:14:34,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 51. [2020-10-28 09:14:34,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-28 09:14:34,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2020-10-28 09:14:34,406 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 33 [2020-10-28 09:14:34,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:14:34,407 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2020-10-28 09:14:34,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 09:14:34,407 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2020-10-28 09:14:34,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 09:14:34,408 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:14:34,408 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 09:14:34,408 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 09:14:34,408 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:14:34,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:14:34,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1316862440, now seen corresponding path program 1 times [2020-10-28 09:14:34,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:14:34,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [37498897] [2020-10-28 09:14:34,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:14:34,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:34,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:34,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:34,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:34,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:34,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:35,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:35,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-28 09:14:35,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:14:35,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1059 [2020-10-28 09:14:35,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:35,483 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:35,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:14:35,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-28 09:14:35,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 09:14:35,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:14:35,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:14:35,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:35,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:35,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:35,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:14:35,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:14:35,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:14:35,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:35,551 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:35,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:14:35,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:14:35,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:14:35,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:14:35,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:14:35,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:35,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:35,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:35,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:14:35,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:14:35,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:14:35,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:35,558 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:35,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:14:35,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:14:35,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:14:35,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:14:35,562 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 09:14:35,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [37498897] [2020-10-28 09:14:35,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:14:35,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 09:14:35,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676173362] [2020-10-28 09:14:35,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 09:14:35,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:14:35,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 09:14:35,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 09:14:35,564 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand 4 states. [2020-10-28 09:14:35,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:14:35,724 INFO L93 Difference]: Finished difference Result 81 states and 90 transitions. [2020-10-28 09:14:35,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 09:14:35,725 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-10-28 09:14:35,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:14:35,727 INFO L225 Difference]: With dead ends: 81 [2020-10-28 09:14:35,728 INFO L226 Difference]: Without dead ends: 66 [2020-10-28 09:14:35,728 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 09:14:35,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-28 09:14:35,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-10-28 09:14:35,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-28 09:14:35,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2020-10-28 09:14:35,739 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 33 [2020-10-28 09:14:35,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:14:35,739 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2020-10-28 09:14:35,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 09:14:35,740 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2020-10-28 09:14:35,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 09:14:35,741 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:14:35,741 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 09:14:35,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 09:14:35,741 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:14:35,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:14:35,742 INFO L82 PathProgramCache]: Analyzing trace with hash 923835430, now seen corresponding path program 4 times [2020-10-28 09:14:35,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:14:35,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1759080273] [2020-10-28 09:14:35,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:14:35,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:35,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:35,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:35,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:35,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:35,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:36,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:36,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:36,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:36,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:37,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:38,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:40,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:40,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-28 09:14:40,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 09:14:40,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4997 [2020-10-28 09:14:40,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:40,757 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:40,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 09:14:40,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:14:40,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 09:14:40,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:14:41,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:14:41,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:41,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:41,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:41,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:14:41,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:14:41,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:14:41,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:41,143 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:41,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:14:41,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:14:41,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:14:41,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:14:41,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:14:41,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:41,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:41,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:41,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:14:41,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:14:41,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:14:41,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:41,151 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:41,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:14:41,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:14:41,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:14:41,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:14:41,156 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:14:41,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1759080273] [2020-10-28 09:14:41,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:14:41,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 09:14:41,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840400227] [2020-10-28 09:14:41,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 09:14:41,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:14:41,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 09:14:41,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-28 09:14:41,158 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand 10 states. [2020-10-28 09:14:41,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:14:41,718 INFO L93 Difference]: Finished difference Result 83 states and 93 transitions. [2020-10-28 09:14:41,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 09:14:41,718 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2020-10-28 09:14:41,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:14:41,719 INFO L225 Difference]: With dead ends: 83 [2020-10-28 09:14:41,720 INFO L226 Difference]: Without dead ends: 68 [2020-10-28 09:14:41,720 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2020-10-28 09:14:41,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-28 09:14:41,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 56. [2020-10-28 09:14:41,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-28 09:14:41,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2020-10-28 09:14:41,732 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 33 [2020-10-28 09:14:41,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:14:41,732 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2020-10-28 09:14:41,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 09:14:41,733 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2020-10-28 09:14:41,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 09:14:41,734 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:14:41,734 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2020-10-28 09:14:41,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 09:14:41,734 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:14:41,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:14:41,735 INFO L82 PathProgramCache]: Analyzing trace with hash 676835237, now seen corresponding path program 3 times [2020-10-28 09:14:41,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:14:41,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [834473474] [2020-10-28 09:14:41,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:14:41,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:41,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:41,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:42,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:42,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:42,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:43,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:45,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:45,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-28 09:14:45,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 09:14:45,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3799 [2020-10-28 09:14:45,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:45,549 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:45,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 09:14:45,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:14:45,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 09:14:45,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:14:45,970 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 27 [2020-10-28 09:14:46,423 WARN L193 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 42 [2020-10-28 09:14:46,826 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 32 [2020-10-28 09:14:47,670 WARN L193 SmtUtils]: Spent 773.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 28 [2020-10-28 09:14:47,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:14:47,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:47,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:47,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:47,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:14:47,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:14:47,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:14:47,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:47,770 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:47,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:14:47,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:14:47,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:14:47,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:14:47,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:14:47,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:47,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:47,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:47,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:14:47,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:14:47,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:14:47,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:47,777 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:47,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:14:47,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:14:47,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:14:47,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:14:47,795 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 09:14:47,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [834473474] [2020-10-28 09:14:47,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:14:47,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 09:14:47,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155644065] [2020-10-28 09:14:47,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 09:14:47,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:14:47,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 09:14:47,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-28 09:14:47,798 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand 11 states. [2020-10-28 09:14:48,265 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-10-28 09:14:48,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:14:48,575 INFO L93 Difference]: Finished difference Result 72 states and 78 transitions. [2020-10-28 09:14:48,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 09:14:48,577 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 36 [2020-10-28 09:14:48,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:14:48,578 INFO L225 Difference]: With dead ends: 72 [2020-10-28 09:14:48,578 INFO L226 Difference]: Without dead ends: 69 [2020-10-28 09:14:48,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:14:48,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-28 09:14:48,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 53. [2020-10-28 09:14:48,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-28 09:14:48,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2020-10-28 09:14:48,592 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 36 [2020-10-28 09:14:48,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:14:48,593 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2020-10-28 09:14:48,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 09:14:48,593 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2020-10-28 09:14:48,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 09:14:48,594 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:14:48,594 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2020-10-28 09:14:48,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 09:14:48,595 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:14:48,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:14:48,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1324066141, now seen corresponding path program 5 times [2020-10-28 09:14:48,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:14:48,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1846175260] [2020-10-28 09:14:48,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:14:48,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:48,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:48,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:48,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:48,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:48,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:48,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:48,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:49,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:49,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:49,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:50,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:52,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:52,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-28 09:14:52,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 09:14:52,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3595 [2020-10-28 09:14:52,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:52,206 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:52,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 09:14:52,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:14:52,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 09:14:52,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:14:52,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:14:52,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:52,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:52,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:52,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:14:52,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:14:52,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:14:52,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:52,482 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:52,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:14:52,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:14:52,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:14:52,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:14:52,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:14:52,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:52,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:52,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:52,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:14:52,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:14:52,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:14:52,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:52,490 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:52,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:14:52,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:14:52,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:14:52,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:14:52,496 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-28 09:14:52,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1846175260] [2020-10-28 09:14:52,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:14:52,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 09:14:52,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961869955] [2020-10-28 09:14:52,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 09:14:52,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:14:52,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 09:14:52,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:14:52,500 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 8 states. [2020-10-28 09:14:53,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:14:53,059 INFO L93 Difference]: Finished difference Result 129 states and 142 transitions. [2020-10-28 09:14:53,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 09:14:53,060 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2020-10-28 09:14:53,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:14:53,061 INFO L225 Difference]: With dead ends: 129 [2020-10-28 09:14:53,061 INFO L226 Difference]: Without dead ends: 109 [2020-10-28 09:14:53,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:14:53,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-28 09:14:53,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 58. [2020-10-28 09:14:53,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-28 09:14:53,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2020-10-28 09:14:53,075 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 36 [2020-10-28 09:14:53,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:14:53,076 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2020-10-28 09:14:53,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 09:14:53,076 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2020-10-28 09:14:53,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 09:14:53,077 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:14:53,077 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 09:14:53,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 09:14:53,077 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:14:53,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:14:53,078 INFO L82 PathProgramCache]: Analyzing trace with hash 261385153, now seen corresponding path program 6 times [2020-10-28 09:14:53,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:14:53,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1820079162] [2020-10-28 09:14:53,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:14:53,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:53,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:53,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:53,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:53,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:53,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:54,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:55,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:55,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-28 09:14:55,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 09:14:55,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2512 [2020-10-28 09:14:55,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:55,644 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:55,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 09:14:55,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:14:55,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 09:14:55,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:14:56,380 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 24 [2020-10-28 09:14:56,822 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 26 [2020-10-28 09:14:57,309 WARN L193 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 23 [2020-10-28 09:14:57,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:14:57,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:57,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:57,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:57,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:14:57,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:14:57,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:14:57,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:57,438 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:57,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:14:57,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:14:57,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:14:57,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:14:57,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:14:57,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:57,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:57,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:57,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:14:57,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:14:57,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:14:57,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:57,444 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:57,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:14:57,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:14:57,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:14:57,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:14:57,453 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:14:57,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1820079162] [2020-10-28 09:14:57,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:14:57,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 09:14:57,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207307372] [2020-10-28 09:14:57,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 09:14:57,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:14:57,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 09:14:57,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-10-28 09:14:57,455 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand 18 states. [2020-10-28 09:14:58,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:14:58,499 INFO L93 Difference]: Finished difference Result 79 states and 86 transitions. [2020-10-28 09:14:58,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 09:14:58,500 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 38 [2020-10-28 09:14:58,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:14:58,502 INFO L225 Difference]: With dead ends: 79 [2020-10-28 09:14:58,502 INFO L226 Difference]: Without dead ends: 76 [2020-10-28 09:14:58,505 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2020-10-28 09:14:58,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-28 09:14:58,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 61. [2020-10-28 09:14:58,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-28 09:14:58,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 67 transitions. [2020-10-28 09:14:58,517 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 67 transitions. Word has length 38 [2020-10-28 09:14:58,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:14:58,517 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 67 transitions. [2020-10-28 09:14:58,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 09:14:58,517 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 67 transitions. [2020-10-28 09:14:58,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 09:14:58,518 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:14:58,518 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 09:14:58,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 09:14:58,518 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:14:58,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:14:58,519 INFO L82 PathProgramCache]: Analyzing trace with hash -2146708784, now seen corresponding path program 1 times [2020-10-28 09:14:58,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:14:58,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1729197643] [2020-10-28 09:14:58,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:14:58,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:58,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:58,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:59,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:59,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-28 09:14:59,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:14:59,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 932 [2020-10-28 09:14:59,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:59,471 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:59,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 09:14:59,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:14:59,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 09:14:59,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:14:59,963 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 24 [2020-10-28 09:15:00,920 WARN L193 SmtUtils]: Spent 835.00 ms on a formula simplification. DAG size of input: 374 DAG size of output: 21 [2020-10-28 09:15:01,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:15:01,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:01,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:01,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:01,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:15:01,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:15:01,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:15:01,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:01,022 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:01,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:15:01,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:15:01,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:15:01,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:15:01,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:15:01,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:01,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:01,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:01,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:15:01,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:15:01,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:15:01,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:01,028 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:01,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:15:01,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:15:01,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:15:01,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:15:01,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-28 09:15:01,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:01,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:01,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:01,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:15:01,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:15:01,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 09:15:01,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:01,040 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:01,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:15:01,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:15:01,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:15:01,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:15:01,050 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:15:01,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1729197643] [2020-10-28 09:15:01,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:15:01,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 09:15:01,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038831209] [2020-10-28 09:15:01,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 09:15:01,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:15:01,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 09:15:01,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:15:01,053 INFO L87 Difference]: Start difference. First operand 61 states and 67 transitions. Second operand 13 states. [2020-10-28 09:15:02,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:15:02,589 INFO L93 Difference]: Finished difference Result 109 states and 124 transitions. [2020-10-28 09:15:02,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 09:15:02,590 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 41 [2020-10-28 09:15:02,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:15:02,591 INFO L225 Difference]: With dead ends: 109 [2020-10-28 09:15:02,592 INFO L226 Difference]: Without dead ends: 106 [2020-10-28 09:15:02,594 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2020-10-28 09:15:02,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-28 09:15:02,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 78. [2020-10-28 09:15:02,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-28 09:15:02,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 87 transitions. [2020-10-28 09:15:02,619 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 87 transitions. Word has length 41 [2020-10-28 09:15:02,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:15:02,619 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 87 transitions. [2020-10-28 09:15:02,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 09:15:02,619 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 87 transitions. [2020-10-28 09:15:02,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 09:15:02,626 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:15:02,626 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2020-10-28 09:15:02,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 09:15:02,626 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:15:02,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:15:02,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1005543128, now seen corresponding path program 7 times [2020-10-28 09:15:02,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:15:02,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [855791418] [2020-10-28 09:15:02,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:15:02,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:02,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:02,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:02,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:02,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:02,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:03,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:03,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:04,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:04,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:05,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:05,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:06,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:07,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:07,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-28 09:15:07,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 09:15:07,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 09:15:07,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:07,642 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:07,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 09:15:07,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:15:07,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 09:15:07,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:15:07,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:15:07,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:07,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:07,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:07,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:15:07,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:15:07,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:15:07,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:07,783 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:07,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:15:07,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:15:07,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:15:07,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:15:07,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:15:07,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:07,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:07,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:07,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:15:07,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:15:07,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:15:07,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:07,787 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:07,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:15:07,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:15:07,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:15:07,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:15:07,791 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:15:07,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [855791418] [2020-10-28 09:15:07,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:15:07,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 09:15:07,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244991983] [2020-10-28 09:15:07,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 09:15:07,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:15:07,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 09:15:07,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-28 09:15:07,793 INFO L87 Difference]: Start difference. First operand 78 states and 87 transitions. Second operand 12 states. [2020-10-28 09:15:08,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:15:08,488 INFO L93 Difference]: Finished difference Result 199 states and 225 transitions. [2020-10-28 09:15:08,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 09:15:08,489 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 41 [2020-10-28 09:15:08,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:15:08,490 INFO L225 Difference]: With dead ends: 199 [2020-10-28 09:15:08,490 INFO L226 Difference]: Without dead ends: 139 [2020-10-28 09:15:08,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2020-10-28 09:15:08,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-28 09:15:08,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 115. [2020-10-28 09:15:08,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-28 09:15:08,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 125 transitions. [2020-10-28 09:15:08,517 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 125 transitions. Word has length 41 [2020-10-28 09:15:08,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:15:08,518 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 125 transitions. [2020-10-28 09:15:08,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 09:15:08,518 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 125 transitions. [2020-10-28 09:15:08,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-28 09:15:08,519 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:15:08,519 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 09:15:08,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 09:15:08,519 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:15:08,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:15:08,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1423666486, now seen corresponding path program 8 times [2020-10-28 09:15:08,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:15:08,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [223065175] [2020-10-28 09:15:08,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:15:08,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:08,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:08,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:08,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:08,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:08,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:08,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:08,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:08,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:08,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:09,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:09,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:09,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:09,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:09,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:09,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:09,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:11,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:12,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:12,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:13,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:13,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-28 09:15:13,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-28 09:15:13,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 09:15:13,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:13,537 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:13,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 09:15:13,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:15:13,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 09:15:13,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:15:14,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:15:14,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:14,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:14,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:14,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:15:14,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:15:14,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 09:15:14,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:14,131 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:14,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:15:14,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:15:14,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:15:14,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:15:14,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:15:14,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:14,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:14,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:14,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:15:14,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:15:14,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:15:14,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:14,137 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:14,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:15:14,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:15:14,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:15:14,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:15:14,143 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:15:14,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [223065175] [2020-10-28 09:15:14,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:15:14,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 09:15:14,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56401590] [2020-10-28 09:15:14,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 09:15:14,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:15:14,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 09:15:14,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:15:14,146 INFO L87 Difference]: Start difference. First operand 115 states and 125 transitions. Second operand 14 states. [2020-10-28 09:15:15,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:15:15,329 INFO L93 Difference]: Finished difference Result 189 states and 203 transitions. [2020-10-28 09:15:15,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 09:15:15,329 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 43 [2020-10-28 09:15:15,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:15:15,332 INFO L225 Difference]: With dead ends: 189 [2020-10-28 09:15:15,332 INFO L226 Difference]: Without dead ends: 156 [2020-10-28 09:15:15,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2020-10-28 09:15:15,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-28 09:15:15,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 139. [2020-10-28 09:15:15,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-28 09:15:15,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 148 transitions. [2020-10-28 09:15:15,364 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 148 transitions. Word has length 43 [2020-10-28 09:15:15,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:15:15,364 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 148 transitions. [2020-10-28 09:15:15,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 09:15:15,364 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 148 transitions. [2020-10-28 09:15:15,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-28 09:15:15,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:15:15,365 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2020-10-28 09:15:15,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 09:15:15,366 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:15:15,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:15:15,366 INFO L82 PathProgramCache]: Analyzing trace with hash -485128533, now seen corresponding path program 1 times [2020-10-28 09:15:15,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:15:15,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1762896577] [2020-10-28 09:15:15,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:15:15,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:15,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:15,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:15,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:16,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:16,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:16,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:16,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:17,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:19,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:20,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:20,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-28 09:15:20,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 09:15:20,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 09:15:20,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:20,390 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:20,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 09:15:20,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:15:20,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 09:15:20,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:15:22,077 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 16 [2020-10-28 09:15:22,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:15:22,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:22,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:22,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:22,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:15:22,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:15:22,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:15:22,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:22,236 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:22,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:15:22,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:15:22,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:15:22,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:15:22,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:15:22,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:22,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:22,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:22,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:15:22,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:15:22,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:15:22,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:22,241 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:22,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:15:22,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:15:22,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:15:22,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:15:22,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-28 09:15:22,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:22,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:22,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:22,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:15:22,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:15:22,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:15:22,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:22,251 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:22,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:15:22,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:15:22,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:15:22,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:15:22,262 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:15:22,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1762896577] [2020-10-28 09:15:22,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:15:22,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 09:15:22,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794806326] [2020-10-28 09:15:22,263 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 09:15:22,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:15:22,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 09:15:22,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2020-10-28 09:15:22,265 INFO L87 Difference]: Start difference. First operand 139 states and 148 transitions. Second operand 23 states. [2020-10-28 09:15:25,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:15:25,501 INFO L93 Difference]: Finished difference Result 166 states and 175 transitions. [2020-10-28 09:15:25,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-28 09:15:25,503 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 46 [2020-10-28 09:15:25,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:15:25,505 INFO L225 Difference]: With dead ends: 166 [2020-10-28 09:15:25,505 INFO L226 Difference]: Without dead ends: 109 [2020-10-28 09:15:25,508 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=367, Invalid=2183, Unknown=0, NotChecked=0, Total=2550 [2020-10-28 09:15:25,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-28 09:15:25,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 101. [2020-10-28 09:15:25,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-28 09:15:25,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 106 transitions. [2020-10-28 09:15:25,535 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 106 transitions. Word has length 46 [2020-10-28 09:15:25,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:15:25,535 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 106 transitions. [2020-10-28 09:15:25,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 09:15:25,535 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 106 transitions. [2020-10-28 09:15:25,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-28 09:15:25,536 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:15:25,536 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2020-10-28 09:15:25,537 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 09:15:25,537 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:15:25,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:15:25,538 INFO L82 PathProgramCache]: Analyzing trace with hash -801164929, now seen corresponding path program 9 times [2020-10-28 09:15:25,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:15:25,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [249223806] [2020-10-28 09:15:25,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:15:25,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:25,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:25,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:25,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:25,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:25,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:25,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:26,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:26,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:26,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:26,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:26,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:27,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:27,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:27,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:28,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:28,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:28,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:28,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:29,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:29,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:29,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:30,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:30,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-28 09:15:30,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-28 09:15:30,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 09:15:30,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:30,560 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:30,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 09:15:30,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:15:30,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 09:15:30,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:15:30,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:15:30,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:30,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:30,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:30,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:15:30,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:15:30,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:15:30,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:30,961 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:30,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:15:30,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:15:30,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:15:30,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:15:30,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:15:30,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:30,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:30,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:30,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:15:30,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:15:30,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:15:30,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:30,965 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:30,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:15:30,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:15:30,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:15:30,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:15:30,972 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 12 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 09:15:30,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [249223806] [2020-10-28 09:15:30,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:15:30,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 09:15:30,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185282315] [2020-10-28 09:15:30,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 09:15:30,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:15:30,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 09:15:30,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:15:30,975 INFO L87 Difference]: Start difference. First operand 101 states and 106 transitions. Second operand 14 states. [2020-10-28 09:15:32,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:15:32,604 INFO L93 Difference]: Finished difference Result 232 states and 253 transitions. [2020-10-28 09:15:32,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 09:15:32,605 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 46 [2020-10-28 09:15:32,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:15:32,608 INFO L225 Difference]: With dead ends: 232 [2020-10-28 09:15:32,608 INFO L226 Difference]: Without dead ends: 206 [2020-10-28 09:15:32,609 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=218, Invalid=712, Unknown=0, NotChecked=0, Total=930 [2020-10-28 09:15:32,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-28 09:15:32,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 106. [2020-10-28 09:15:32,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-28 09:15:32,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 112 transitions. [2020-10-28 09:15:32,632 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 112 transitions. Word has length 46 [2020-10-28 09:15:32,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:15:32,632 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 112 transitions. [2020-10-28 09:15:32,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 09:15:32,632 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 112 transitions. [2020-10-28 09:15:32,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-28 09:15:32,633 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:15:32,633 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 09:15:32,633 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 09:15:32,634 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:15:32,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:15:32,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1318390499, now seen corresponding path program 10 times [2020-10-28 09:15:32,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:15:32,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [449826134] [2020-10-28 09:15:32,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:15:32,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:32,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:32,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:33,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:33,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:33,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:34,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:34,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:35,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:35,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:35,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:35,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:36,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:37,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:37,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-28 09:15:37,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 09:15:37,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 09:15:37,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:37,670 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:37,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-28 09:15:37,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:15:37,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 09:15:37,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:15:38,263 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 41 [2020-10-28 09:15:38,458 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 45 [2020-10-28 09:15:38,713 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 46 [2020-10-28 09:15:38,993 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 43 [2020-10-28 09:15:39,142 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 38 [2020-10-28 09:15:39,395 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 40 [2020-10-28 09:15:39,594 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 45 [2020-10-28 09:15:39,890 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 39 [2020-10-28 09:15:40,216 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 42 [2020-10-28 09:15:40,631 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 42 [2020-10-28 09:15:41,004 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 37 [2020-10-28 09:15:41,306 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 36 [2020-10-28 09:15:41,586 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 30 [2020-10-28 09:15:41,881 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 30 [2020-10-28 09:15:42,136 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 21 [2020-10-28 09:15:42,412 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 26 [2020-10-28 09:15:42,717 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 18 [2020-10-28 09:15:42,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:15:42,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:42,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:42,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:42,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:15:42,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:15:42,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:15:42,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:42,937 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:42,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:15:42,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:15:42,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:15:42,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:15:42,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:15:42,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:42,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:42,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:42,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:15:42,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:15:42,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:15:42,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:42,942 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:42,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:15:42,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:15:42,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:15:42,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:15:42,965 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:15:42,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [449826134] [2020-10-28 09:15:42,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:15:42,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-28 09:15:42,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576185859] [2020-10-28 09:15:42,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-28 09:15:42,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:15:42,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-28 09:15:42,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2020-10-28 09:15:42,967 INFO L87 Difference]: Start difference. First operand 106 states and 112 transitions. Second operand 28 states. [2020-10-28 09:15:43,999 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2020-10-28 09:15:44,227 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2020-10-28 09:15:44,603 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 56 [2020-10-28 09:15:44,861 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 60 [2020-10-28 09:15:45,161 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 52 [2020-10-28 09:15:45,390 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 50 [2020-10-28 09:15:45,626 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2020-10-28 09:15:46,002 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 71 [2020-10-28 09:15:46,192 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 33 [2020-10-28 09:15:46,538 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 74 [2020-10-28 09:15:46,923 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 72 [2020-10-28 09:15:47,384 WARN L193 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 67 [2020-10-28 09:15:47,653 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 64 [2020-10-28 09:15:48,004 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2020-10-28 09:15:48,265 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 44 [2020-10-28 09:15:48,567 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2020-10-28 09:15:48,810 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2020-10-28 09:15:49,115 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2020-10-28 09:15:49,332 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-10-28 09:15:49,609 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 43 [2020-10-28 09:15:49,868 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2020-10-28 09:15:50,099 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2020-10-28 09:15:50,279 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 47 [2020-10-28 09:15:50,579 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 29 [2020-10-28 09:15:51,435 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2020-10-28 09:15:51,903 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2020-10-28 09:15:52,140 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2020-10-28 09:15:52,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:15:52,391 INFO L93 Difference]: Finished difference Result 189 states and 204 transitions. [2020-10-28 09:15:52,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-28 09:15:52,392 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 48 [2020-10-28 09:15:52,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:15:52,394 INFO L225 Difference]: With dead ends: 189 [2020-10-28 09:15:52,395 INFO L226 Difference]: Without dead ends: 186 [2020-10-28 09:15:52,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=397, Invalid=3635, Unknown=0, NotChecked=0, Total=4032 [2020-10-28 09:15:52,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-28 09:15:52,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 125. [2020-10-28 09:15:52,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-28 09:15:52,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 134 transitions. [2020-10-28 09:15:52,437 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 134 transitions. Word has length 48 [2020-10-28 09:15:52,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:15:52,437 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 134 transitions. [2020-10-28 09:15:52,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-28 09:15:52,438 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 134 transitions. [2020-10-28 09:15:52,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-28 09:15:52,439 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:15:52,439 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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] [2020-10-28 09:15:52,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 09:15:52,440 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:15:52,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:15:52,440 INFO L82 PathProgramCache]: Analyzing trace with hash -2063882700, now seen corresponding path program 2 times [2020-10-28 09:15:52,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:15:52,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [152320458] [2020-10-28 09:15:52,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:15:52,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:52,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:52,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:53,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:53,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 09:15:53,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:15:53,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1413 [2020-10-28 09:15:53,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:53,872 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:53,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 09:15:53,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:15:53,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 09:15:53,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:15:57,664 WARN L193 SmtUtils]: Spent 2.29 s on a formula simplification. DAG size of input: 332 DAG size of output: 16 [2020-10-28 09:15:58,390 WARN L193 SmtUtils]: Spent 689.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 21 [2020-10-28 09:15:59,361 WARN L193 SmtUtils]: Spent 920.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 31 [2020-10-28 09:15:59,672 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 36 [2020-10-28 09:16:00,016 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 38 [2020-10-28 09:16:00,360 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 38 [2020-10-28 09:16:01,315 WARN L193 SmtUtils]: Spent 840.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 22 [2020-10-28 09:16:01,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:16:01,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:01,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:01,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:01,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:16:01,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:01,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:16:01,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:01,443 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:01,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:01,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:01,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:01,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:01,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:16:01,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:01,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:01,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:01,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:16:01,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:01,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:16:01,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:01,447 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:01,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:01,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:01,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:01,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:01,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-28 09:16:01,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:01,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:01,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:01,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:16:01,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:01,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 09:16:01,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:01,461 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:01,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:16:01,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:01,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:16:01,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:01,476 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 09:16:01,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [152320458] [2020-10-28 09:16:01,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:16:01,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 09:16:01,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997539905] [2020-10-28 09:16:01,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 09:16:01,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:16:01,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 09:16:01,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2020-10-28 09:16:01,478 INFO L87 Difference]: Start difference. First operand 125 states and 134 transitions. Second operand 15 states. [2020-10-28 09:16:02,238 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 25 [2020-10-28 09:16:02,546 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 33 [2020-10-28 09:16:02,854 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 37 [2020-10-28 09:16:03,068 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 43 [2020-10-28 09:16:03,477 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 40 [2020-10-28 09:16:03,648 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 46 [2020-10-28 09:16:03,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:16:03,743 INFO L93 Difference]: Finished difference Result 165 states and 181 transitions. [2020-10-28 09:16:03,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 09:16:03,744 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 51 [2020-10-28 09:16:03,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:16:03,746 INFO L225 Difference]: With dead ends: 165 [2020-10-28 09:16:03,746 INFO L226 Difference]: Without dead ends: 162 [2020-10-28 09:16:03,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=147, Invalid=723, Unknown=0, NotChecked=0, Total=870 [2020-10-28 09:16:03,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-28 09:16:03,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 142. [2020-10-28 09:16:03,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-28 09:16:03,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 154 transitions. [2020-10-28 09:16:03,778 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 154 transitions. Word has length 51 [2020-10-28 09:16:03,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:16:03,778 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 154 transitions. [2020-10-28 09:16:03,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 09:16:03,779 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 154 transitions. [2020-10-28 09:16:03,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-28 09:16:03,779 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:16:03,779 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 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] [2020-10-28 09:16:03,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 09:16:03,780 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:16:03,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:16:03,780 INFO L82 PathProgramCache]: Analyzing trace with hash -155956933, now seen corresponding path program 11 times [2020-10-28 09:16:03,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:16:03,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [840740600] [2020-10-28 09:16:03,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:16:03,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:03,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:03,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:03,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:03,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:03,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:04,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:04,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:05,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:05,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:05,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:06,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:06,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:07,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:07,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:07,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:07,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:08,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:08,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-28 09:16:08,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 09:16:08,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 09:16:08,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:08,798 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:08,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 09:16:08,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:16:08,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 09:16:08,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:09,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:16:09,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:09,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:09,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:09,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:16:09,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:09,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:16:09,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:09,059 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:09,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:09,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:09,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:09,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:09,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:16:09,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:09,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:09,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:09,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:16:09,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:09,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:16:09,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:09,070 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:09,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:09,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:09,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:09,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:09,080 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 25 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:16:09,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [840740600] [2020-10-28 09:16:09,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:16:09,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 09:16:09,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943078161] [2020-10-28 09:16:09,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 09:16:09,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:16:09,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 09:16:09,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-28 09:16:09,085 INFO L87 Difference]: Start difference. First operand 142 states and 154 transitions. Second operand 16 states. [2020-10-28 09:16:10,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:16:10,654 INFO L93 Difference]: Finished difference Result 251 states and 275 transitions. [2020-10-28 09:16:10,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 09:16:10,655 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 50 [2020-10-28 09:16:10,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:16:10,657 INFO L225 Difference]: With dead ends: 251 [2020-10-28 09:16:10,658 INFO L226 Difference]: Without dead ends: 224 [2020-10-28 09:16:10,659 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=209, Invalid=661, Unknown=0, NotChecked=0, Total=870 [2020-10-28 09:16:10,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-28 09:16:10,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 159. [2020-10-28 09:16:10,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-28 09:16:10,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 171 transitions. [2020-10-28 09:16:10,697 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 171 transitions. Word has length 50 [2020-10-28 09:16:10,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:16:10,698 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 171 transitions. [2020-10-28 09:16:10,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 09:16:10,698 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 171 transitions. [2020-10-28 09:16:10,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-28 09:16:10,699 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:16:10,699 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2020-10-28 09:16:10,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 09:16:10,699 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:16:10,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:16:10,699 INFO L82 PathProgramCache]: Analyzing trace with hash 149637708, now seen corresponding path program 12 times [2020-10-28 09:16:10,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:16:10,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [847656516] [2020-10-28 09:16:10,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:16:10,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:10,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:10,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:10,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:10,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:10,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:10,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:10,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:12,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:12,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:12,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:13,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:14,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:14,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:15,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:15,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 09:16:15,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 09:16:15,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 09:16:15,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:15,714 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:15,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 09:16:15,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:16:15,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 09:16:15,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:15,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:16:15,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:15,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:15,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:15,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:16:15,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:15,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:16:15,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:15,923 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:15,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:15,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:15,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:15,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:15,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:16:15,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:15,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:15,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:15,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:16:15,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:15,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:16:15,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:15,931 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:15,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:15,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:15,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:15,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:15,936 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 51 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:16:15,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [847656516] [2020-10-28 09:16:15,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:16:15,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 09:16:15,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620104818] [2020-10-28 09:16:15,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 09:16:15,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:16:15,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 09:16:15,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-28 09:16:15,942 INFO L87 Difference]: Start difference. First operand 159 states and 171 transitions. Second operand 16 states. [2020-10-28 09:16:17,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:16:17,125 INFO L93 Difference]: Finished difference Result 268 states and 294 transitions. [2020-10-28 09:16:17,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-28 09:16:17,126 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 51 [2020-10-28 09:16:17,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:16:17,129 INFO L225 Difference]: With dead ends: 268 [2020-10-28 09:16:17,129 INFO L226 Difference]: Without dead ends: 223 [2020-10-28 09:16:17,130 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=256, Invalid=736, Unknown=0, NotChecked=0, Total=992 [2020-10-28 09:16:17,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-28 09:16:17,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 183. [2020-10-28 09:16:17,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-10-28 09:16:17,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 195 transitions. [2020-10-28 09:16:17,178 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 195 transitions. Word has length 51 [2020-10-28 09:16:17,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:16:17,179 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 195 transitions. [2020-10-28 09:16:17,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 09:16:17,179 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 195 transitions. [2020-10-28 09:16:17,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-28 09:16:17,180 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:16:17,180 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-28 09:16:17,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 09:16:17,180 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:16:17,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:16:17,181 INFO L82 PathProgramCache]: Analyzing trace with hash 527046549, now seen corresponding path program 2 times [2020-10-28 09:16:17,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:16:17,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1985668928] [2020-10-28 09:16:17,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:16:17,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:17,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:17,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:17,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:17,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:17,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:18,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:18,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:19,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:19,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:19,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:20,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:20,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:20,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:21,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:21,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:22,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:22,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:22,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:22,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-28 09:16:22,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-28 09:16:22,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 09:16:22,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:22,208 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:22,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-28 09:16:22,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:16:22,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 09:16:22,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:22,629 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 31 [2020-10-28 09:16:22,776 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 29 [2020-10-28 09:16:22,914 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 25 [2020-10-28 09:16:23,105 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 31 [2020-10-28 09:16:23,312 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 29 [2020-10-28 09:16:23,525 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 28 [2020-10-28 09:16:23,690 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 24 [2020-10-28 09:16:23,868 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 23 [2020-10-28 09:16:24,412 WARN L193 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 23 [2020-10-28 09:16:24,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:16:24,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:24,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:24,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:24,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:16:24,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:24,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:16:24,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:24,578 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:24,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:24,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:24,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:24,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:24,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:16:24,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:24,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:24,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:24,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:16:24,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:24,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:16:24,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:24,584 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:24,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:24,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:24,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:24,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:24,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-28 09:16:24,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:24,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:24,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:24,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:16:24,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:24,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 09:16:24,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:24,599 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:24,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:16:24,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:24,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:16:24,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:24,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-28 09:16:24,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:24,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:24,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:24,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:16:24,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:24,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 09:16:24,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:24,621 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:24,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 09:16:24,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:24,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 09:16:24,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:24,727 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 09:16:24,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1985668928] [2020-10-28 09:16:24,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:16:24,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 09:16:24,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890638269] [2020-10-28 09:16:24,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 09:16:24,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:16:24,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 09:16:24,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2020-10-28 09:16:24,729 INFO L87 Difference]: Start difference. First operand 183 states and 195 transitions. Second operand 23 states. [2020-10-28 09:16:25,281 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2020-10-28 09:16:25,963 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2020-10-28 09:16:26,465 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-10-28 09:16:26,992 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2020-10-28 09:16:27,206 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2020-10-28 09:16:27,559 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-10-28 09:16:27,869 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2020-10-28 09:16:28,275 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-10-28 09:16:28,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:16:28,806 INFO L93 Difference]: Finished difference Result 204 states and 219 transitions. [2020-10-28 09:16:28,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-28 09:16:28,809 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 54 [2020-10-28 09:16:28,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:16:28,811 INFO L225 Difference]: With dead ends: 204 [2020-10-28 09:16:28,811 INFO L226 Difference]: Without dead ends: 169 [2020-10-28 09:16:28,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=313, Invalid=1943, Unknown=0, NotChecked=0, Total=2256 [2020-10-28 09:16:28,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-28 09:16:28,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 151. [2020-10-28 09:16:28,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-28 09:16:28,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 162 transitions. [2020-10-28 09:16:28,859 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 162 transitions. Word has length 54 [2020-10-28 09:16:28,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:16:28,859 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 162 transitions. [2020-10-28 09:16:28,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 09:16:28,860 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 162 transitions. [2020-10-28 09:16:28,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-28 09:16:28,863 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:16:28,863 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 09:16:28,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 09:16:28,863 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:16:28,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:16:28,864 INFO L82 PathProgramCache]: Analyzing trace with hash -113305234, now seen corresponding path program 13 times [2020-10-28 09:16:28,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:16:28,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1835145875] [2020-10-28 09:16:28,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:16:28,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:28,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:28,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:29,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:29,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:29,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:29,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:29,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:29,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:29,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:29,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:29,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:30,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:30,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:30,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:30,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:30,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:30,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:30,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:30,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:31,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:31,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:31,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:31,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:31,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:33,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:33,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 09:16:33,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 24 [2020-10-28 09:16:33,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 09:16:33,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:33,889 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:33,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 09:16:33,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:16:33,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 09:16:33,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:34,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:16:34,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:34,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:34,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:34,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:16:34,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:34,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:16:34,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:34,584 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:34,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:34,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:34,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:34,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:34,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:16:34,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:34,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:34,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:34,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:16:34,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:34,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:16:34,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:34,589 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:34,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:34,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:34,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:34,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:34,596 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 16 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:16:34,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1835145875] [2020-10-28 09:16:34,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:16:34,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 09:16:34,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196339159] [2020-10-28 09:16:34,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 09:16:34,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:16:34,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 09:16:34,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2020-10-28 09:16:34,597 INFO L87 Difference]: Start difference. First operand 151 states and 162 transitions. Second operand 18 states. [2020-10-28 09:16:37,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:16:37,110 INFO L93 Difference]: Finished difference Result 197 states and 214 transitions. [2020-10-28 09:16:37,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-28 09:16:37,111 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 53 [2020-10-28 09:16:37,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:16:37,113 INFO L225 Difference]: With dead ends: 197 [2020-10-28 09:16:37,113 INFO L226 Difference]: Without dead ends: 185 [2020-10-28 09:16:37,115 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=444, Invalid=1812, Unknown=0, NotChecked=0, Total=2256 [2020-10-28 09:16:37,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-28 09:16:37,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 154. [2020-10-28 09:16:37,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-28 09:16:37,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 165 transitions. [2020-10-28 09:16:37,153 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 165 transitions. Word has length 53 [2020-10-28 09:16:37,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:16:37,154 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 165 transitions. [2020-10-28 09:16:37,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 09:16:37,154 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 165 transitions. [2020-10-28 09:16:37,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-28 09:16:37,155 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:16:37,155 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 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] [2020-10-28 09:16:37,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 09:16:37,155 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:16:37,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:16:37,156 INFO L82 PathProgramCache]: Analyzing trace with hash 921367559, now seen corresponding path program 3 times [2020-10-28 09:16:37,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:16:37,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1323500822] [2020-10-28 09:16:37,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:16:37,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:37,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:37,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:37,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:38,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:38,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:38,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:39,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:40,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:40,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:41,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:41,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:42,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:42,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-28 09:16:42,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 09:16:42,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 09:16:42,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:42,188 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:42,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-28 09:16:42,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:16:42,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 09:16:42,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:43,348 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 29 [2020-10-28 09:16:43,545 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 28 [2020-10-28 09:16:43,763 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 29 [2020-10-28 09:16:44,012 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 30 [2020-10-28 09:16:44,345 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 31 [2020-10-28 09:16:44,664 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 30 [2020-10-28 09:16:44,882 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 29 [2020-10-28 09:16:45,098 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 24 [2020-10-28 09:16:45,319 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 24 [2020-10-28 09:16:45,524 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 20 [2020-10-28 09:16:45,731 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 22 [2020-10-28 09:16:45,944 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 22 [2020-10-28 09:16:46,224 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 18 [2020-10-28 09:16:46,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:16:46,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:46,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:46,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:46,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:16:46,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:46,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:16:46,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:46,434 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:46,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:46,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:46,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:46,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:46,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:16:46,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:46,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:46,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:46,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:16:46,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:46,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:16:46,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:46,439 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:46,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:46,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:46,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:46,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:46,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-28 09:16:46,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:46,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:46,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:46,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:16:46,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:46,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 09:16:46,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:46,450 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:46,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:16:46,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:46,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:16:46,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:46,469 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 2 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:16:46,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1323500822] [2020-10-28 09:16:46,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:16:46,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-28 09:16:46,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650231732] [2020-10-28 09:16:46,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-28 09:16:46,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:16:46,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-28 09:16:46,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2020-10-28 09:16:46,472 INFO L87 Difference]: Start difference. First operand 154 states and 165 transitions. Second operand 28 states. [2020-10-28 09:16:47,963 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 18 [2020-10-28 09:16:48,164 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 19 [2020-10-28 09:16:48,533 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 24 [2020-10-28 09:16:48,944 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 33 [2020-10-28 09:16:49,361 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 37 [2020-10-28 09:16:49,542 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 37 [2020-10-28 09:16:49,785 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2020-10-28 09:16:50,236 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2020-10-28 09:16:50,431 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-10-28 09:16:50,868 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 42 [2020-10-28 09:16:51,082 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2020-10-28 09:16:52,197 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 29 [2020-10-28 09:16:52,802 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 23 [2020-10-28 09:16:53,092 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 47 [2020-10-28 09:16:53,681 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2020-10-28 09:16:54,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:16:54,087 INFO L93 Difference]: Finished difference Result 205 states and 218 transitions. [2020-10-28 09:16:54,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-28 09:16:54,093 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 56 [2020-10-28 09:16:54,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:16:54,094 INFO L225 Difference]: With dead ends: 205 [2020-10-28 09:16:54,094 INFO L226 Difference]: Without dead ends: 202 [2020-10-28 09:16:54,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1071 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=622, Invalid=4208, Unknown=0, NotChecked=0, Total=4830 [2020-10-28 09:16:54,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-28 09:16:54,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 174. [2020-10-28 09:16:54,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-28 09:16:54,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 184 transitions. [2020-10-28 09:16:54,140 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 184 transitions. Word has length 56 [2020-10-28 09:16:54,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:16:54,141 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 184 transitions. [2020-10-28 09:16:54,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-28 09:16:54,141 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 184 transitions. [2020-10-28 09:16:54,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-28 09:16:54,143 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:16:54,143 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 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] [2020-10-28 09:16:54,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 09:16:54,143 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:16:54,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:16:54,144 INFO L82 PathProgramCache]: Analyzing trace with hash -786859941, now seen corresponding path program 14 times [2020-10-28 09:16:54,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:16:54,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1189531493] [2020-10-28 09:16:54,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:16:54,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:54,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:54,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:54,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:54,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:54,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:54,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:54,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:54,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:55,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:55,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:55,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:55,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:55,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:55,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:55,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:55,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:56,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:57,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:58,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:59,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:59,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 09:16:59,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-28 09:16:59,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 09:16:59,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:59,165 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:59,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 09:16:59,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:16:59,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 09:16:59,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:59,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:16:59,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:59,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:59,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:59,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:16:59,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:59,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:16:59,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:59,546 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:59,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:59,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:59,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:59,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:59,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:16:59,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:59,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:59,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:59,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:16:59,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:59,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:16:59,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:59,551 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:59,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:59,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:59,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:59,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:59,560 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 14 proven. 35 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-10-28 09:16:59,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1189531493] [2020-10-28 09:16:59,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:16:59,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 09:16:59,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278644891] [2020-10-28 09:16:59,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 09:16:59,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:16:59,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 09:16:59,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-28 09:16:59,562 INFO L87 Difference]: Start difference. First operand 174 states and 184 transitions. Second operand 12 states. [2020-10-28 09:17:01,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:17:01,163 INFO L93 Difference]: Finished difference Result 289 states and 315 transitions. [2020-10-28 09:17:01,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 09:17:01,164 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 56 [2020-10-28 09:17:01,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:17:01,166 INFO L225 Difference]: With dead ends: 289 [2020-10-28 09:17:01,166 INFO L226 Difference]: Without dead ends: 257 [2020-10-28 09:17:01,167 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:17:01,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-10-28 09:17:01,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 179. [2020-10-28 09:17:01,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-10-28 09:17:01,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 190 transitions. [2020-10-28 09:17:01,215 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 190 transitions. Word has length 56 [2020-10-28 09:17:01,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:17:01,215 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 190 transitions. [2020-10-28 09:17:01,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 09:17:01,215 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 190 transitions. [2020-10-28 09:17:01,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 09:17:01,216 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:17:01,216 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 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] [2020-10-28 09:17:01,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 09:17:01,216 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:17:01,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:17:01,217 INFO L82 PathProgramCache]: Analyzing trace with hash 492871198, now seen corresponding path program 3 times [2020-10-28 09:17:01,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:17:01,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1952369063] [2020-10-28 09:17:01,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:17:01,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:01,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:01,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:03,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:03,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 09:17:03,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:17:03,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1826 [2020-10-28 09:17:03,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:03,060 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:03,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 09:17:03,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:17:03,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-28 09:17:03,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:17:03,406 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 17 [2020-10-28 09:17:03,596 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 27 [2020-10-28 09:17:03,846 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2020-10-28 09:17:03,983 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2020-10-28 09:17:04,127 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2020-10-28 09:17:04,273 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2020-10-28 09:17:04,458 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 12 [2020-10-28 09:17:04,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:17:04,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:04,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:04,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:04,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:17:04,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:17:04,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:17:04,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:04,617 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:04,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:17:04,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:17:04,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:17:04,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:17:04,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:17:04,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:04,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:04,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:04,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:17:04,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:17:04,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:17:04,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:04,620 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:04,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:17:04,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:17:04,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:17:04,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:17:04,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-28 09:17:04,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:04,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:04,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:04,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:17:04,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:17:04,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 09:17:04,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:04,632 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:04,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:17:04,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:17:04,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:17:04,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:17:04,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-28 09:17:04,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:04,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:04,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:04,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:17:04,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:17:04,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 09:17:04,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:04,646 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:04,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:17:04,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:17:04,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:17:04,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:17:04,675 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 44 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 09:17:04,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1952369063] [2020-10-28 09:17:04,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:17:04,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 09:17:04,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305675750] [2020-10-28 09:17:04,676 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 09:17:04,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:17:04,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 09:17:04,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:17:04,677 INFO L87 Difference]: Start difference. First operand 179 states and 190 transitions. Second operand 17 states. [2020-10-28 09:17:05,913 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 31 [2020-10-28 09:17:06,499 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2020-10-28 09:17:06,759 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 31 [2020-10-28 09:17:07,012 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 35 [2020-10-28 09:17:07,247 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 38 [2020-10-28 09:17:07,676 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2020-10-28 09:17:07,851 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 41 [2020-10-28 09:17:07,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:17:07,920 INFO L93 Difference]: Finished difference Result 211 states and 226 transitions. [2020-10-28 09:17:07,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 09:17:07,922 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 59 [2020-10-28 09:17:07,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:17:07,924 INFO L225 Difference]: With dead ends: 211 [2020-10-28 09:17:07,924 INFO L226 Difference]: Without dead ends: 206 [2020-10-28 09:17:07,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=179, Invalid=1081, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 09:17:07,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-28 09:17:07,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 199. [2020-10-28 09:17:07,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-10-28 09:17:07,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 212 transitions. [2020-10-28 09:17:07,986 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 212 transitions. Word has length 59 [2020-10-28 09:17:07,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:17:07,986 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 212 transitions. [2020-10-28 09:17:07,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 09:17:07,986 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 212 transitions. [2020-10-28 09:17:07,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 09:17:07,987 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:17:07,987 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:17:07,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 09:17:07,987 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:17:07,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:17:07,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1848390023, now seen corresponding path program 15 times [2020-10-28 09:17:07,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:17:07,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2035511738] [2020-10-28 09:17:07,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:17:08,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:08,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:08,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:09,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:09,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:11,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:11,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:12,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:12,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:13,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:13,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-28 09:17:13,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 09:17:13,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5044 [2020-10-28 09:17:13,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:13,051 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:13,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-28 09:17:13,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:17:13,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 09:17:13,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:17:13,930 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 22 [2020-10-28 09:17:14,232 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 20 [2020-10-28 09:17:14,426 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 25 [2020-10-28 09:17:14,610 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 31 [2020-10-28 09:17:14,870 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 30 [2020-10-28 09:17:15,152 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 25 [2020-10-28 09:17:15,316 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 24 [2020-10-28 09:17:15,758 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 23 [2020-10-28 09:17:15,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:17:15,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:15,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:15,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:15,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:17:15,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:17:15,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:17:15,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:15,931 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:15,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:17:15,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:17:15,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:17:15,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:17:15,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:17:15,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:15,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:15,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:15,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:17:15,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:17:15,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:17:15,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:15,935 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:15,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:17:15,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:17:15,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:17:15,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:17:15,967 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 7 proven. 100 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-28 09:17:15,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2035511738] [2020-10-28 09:17:15,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:17:15,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 09:17:15,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109249022] [2020-10-28 09:17:15,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 09:17:15,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:17:15,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 09:17:15,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2020-10-28 09:17:15,975 INFO L87 Difference]: Start difference. First operand 199 states and 212 transitions. Second operand 24 states. [2020-10-28 09:17:18,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:17:18,530 INFO L93 Difference]: Finished difference Result 229 states and 246 transitions. [2020-10-28 09:17:18,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 09:17:18,531 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 58 [2020-10-28 09:17:18,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:17:18,533 INFO L225 Difference]: With dead ends: 229 [2020-10-28 09:17:18,533 INFO L226 Difference]: Without dead ends: 226 [2020-10-28 09:17:18,534 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=180, Invalid=1152, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 09:17:18,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-10-28 09:17:18,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 199. [2020-10-28 09:17:18,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-10-28 09:17:18,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 212 transitions. [2020-10-28 09:17:18,598 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 212 transitions. Word has length 58 [2020-10-28 09:17:18,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:17:18,598 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 212 transitions. [2020-10-28 09:17:18,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 09:17:18,599 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 212 transitions. [2020-10-28 09:17:18,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-28 09:17:18,599 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:17:18,600 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 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] [2020-10-28 09:17:18,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 09:17:18,600 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:17:18,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:17:18,601 INFO L82 PathProgramCache]: Analyzing trace with hash -369198696, now seen corresponding path program 4 times [2020-10-28 09:17:18,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:17:18,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [486971275] [2020-10-28 09:17:18,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:17:18,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:18,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:19,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:21,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:21,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 09:17:21,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:17:21,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2973 [2020-10-28 09:17:21,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:21,596 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:21,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 09:17:21,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:17:21,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-28 09:17:21,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0