/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/loops/eureka_01-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 09:56:42,830 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 09:56:42,835 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 09:56:42,891 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 09:56:42,892 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 09:56:42,898 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 09:56:42,901 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 09:56:42,905 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 09:56:42,909 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 09:56:42,914 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 09:56:42,916 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 09:56:42,917 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 09:56:42,917 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 09:56:42,921 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 09:56:42,924 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 09:56:42,927 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 09:56:42,928 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 09:56:42,932 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 09:56:42,941 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 09:56:42,945 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 09:56:42,950 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 09:56:42,952 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 09:56:42,953 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 09:56:42,956 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 09:56:42,962 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 09:56:42,963 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 09:56:42,968 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 09:56:42,969 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 09:56:42,970 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 09:56:42,972 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 09:56:42,972 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 09:56:42,973 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 09:56:42,975 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 09:56:42,976 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 09:56:42,977 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 09:56:42,977 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 09:56:42,978 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 09:56:42,978 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 09:56:42,978 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 09:56:42,979 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 09:56:42,980 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 09:56:42,987 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 [2020-10-29 09:56:43,046 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 09:56:43,046 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 09:56:43,051 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 09:56:43,051 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 09:56:43,052 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 09:56:43,052 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 09:56:43,052 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 09:56:43,052 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 09:56:43,053 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 09:56:43,053 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 09:56:43,054 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 09:56:43,054 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 09:56:43,054 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 09:56:43,055 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 09:56:43,055 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 09:56:43,055 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 09:56:43,055 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 09:56:43,055 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 09:56:43,055 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 09:56:43,056 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 09:56:43,056 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 09:56:43,056 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 09:56:43,056 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 09:56:43,056 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 09:56:43,057 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 09:56:43,057 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 09:56:43,057 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 09:56:43,057 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 09:56:43,057 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 09:56:43,057 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 09:56:43,444 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 09:56:43,471 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 09:56:43,475 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 09:56:43,477 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 09:56:43,478 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 09:56:43,480 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/eureka_01-1.c [2020-10-29 09:56:43,561 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4e60a5b1e/3d12a545024e433ba84622a7f602ebba/FLAGd0e846593 [2020-10-29 09:56:44,237 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 09:56:44,238 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/eureka_01-1.c [2020-10-29 09:56:44,248 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4e60a5b1e/3d12a545024e433ba84622a7f602ebba/FLAGd0e846593 [2020-10-29 09:56:44,562 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4e60a5b1e/3d12a545024e433ba84622a7f602ebba [2020-10-29 09:56:44,566 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 09:56:44,574 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 09:56:44,579 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 09:56:44,579 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 09:56:44,584 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 09:56:44,586 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:56:44" (1/1) ... [2020-10-29 09:56:44,591 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@522b80ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:56:44, skipping insertion in model container [2020-10-29 09:56:44,592 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:56:44" (1/1) ... [2020-10-29 09:56:44,601 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 09:56:44,624 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 09:56:44,871 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:56:44,881 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 09:56:44,927 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:56:44,957 INFO L208 MainTranslator]: Completed translation [2020-10-29 09:56:44,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:56:44 WrapperNode [2020-10-29 09:56:44,960 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 09:56:44,961 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 09:56:44,962 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 09:56:44,962 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 09:56:44,977 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:56:44" (1/1) ... [2020-10-29 09:56:44,979 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:56:44" (1/1) ... [2020-10-29 09:56:45,005 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:56:44" (1/1) ... [2020-10-29 09:56:45,005 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:56:44" (1/1) ... [2020-10-29 09:56:45,043 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:56:44" (1/1) ... [2020-10-29 09:56:45,058 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:56:44" (1/1) ... [2020-10-29 09:56:45,066 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:56:44" (1/1) ... [2020-10-29 09:56:45,072 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 09:56:45,075 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 09:56:45,076 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 09:56:45,076 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 09:56:45,077 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:56:44" (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 [2020-10-29 09:56:45,181 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 09:56:45,181 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 09:56:45,182 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 09:56:45,182 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 09:56:45,183 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-29 09:56:45,183 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 09:56:45,183 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 09:56:45,184 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 09:56:45,184 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 09:56:45,184 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 09:56:45,186 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 09:56:45,186 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 09:56:45,186 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-29 09:56:45,187 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 09:56:45,187 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 09:56:45,188 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 09:56:45,188 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 09:56:45,189 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 09:56:45,189 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 09:56:45,189 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 09:56:45,902 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 09:56:45,903 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-29 09:56:45,905 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:56:45 BoogieIcfgContainer [2020-10-29 09:56:45,905 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 09:56:45,907 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 09:56:45,907 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 09:56:45,911 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 09:56:45,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 09:56:44" (1/3) ... [2020-10-29 09:56:45,912 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@788818f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:56:45, skipping insertion in model container [2020-10-29 09:56:45,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:56:44" (2/3) ... [2020-10-29 09:56:45,913 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@788818f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:56:45, skipping insertion in model container [2020-10-29 09:56:45,913 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:56:45" (3/3) ... [2020-10-29 09:56:45,914 INFO L111 eAbstractionObserver]: Analyzing ICFG eureka_01-1.c [2020-10-29 09:56:45,927 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 09:56:45,932 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 09:56:45,947 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 09:56:45,975 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 09:56:45,975 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 09:56:45,976 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 09:56:45,976 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 09:56:45,976 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 09:56:45,976 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 09:56:45,976 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 09:56:45,977 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 09:56:45,996 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-10-29 09:56:46,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-29 09:56:46,003 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:56:46,004 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] [2020-10-29 09:56:46,005 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:56:46,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:56:46,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1323235863, now seen corresponding path program 1 times [2020-10-29 09:56:46,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:56:46,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1214897876] [2020-10-29 09:56:46,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:56:46,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:56:46,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:56:46,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:56:46,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:56:46,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:56:46,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-29 09:56:46,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:56:46,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 482 [2020-10-29 09:56:46,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:56:46,682 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:56:46,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:56:46,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 09:56:46,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:56:46,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 09:56:46,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:56:46,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:56:46,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:56:46,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:56:46,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:56:46,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:56:46,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 09:56:46,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:56:46,803 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:56:46,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:56:46,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:56:46,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:56:46,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:56:46,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:56:46,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1214897876] [2020-10-29 09:56:46,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:56:46,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-29 09:56:46,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5933197] [2020-10-29 09:56:46,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-29 09:56:46,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:56:46,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-29 09:56:46,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-29 09:56:46,842 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 3 states. [2020-10-29 09:56:46,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:56:46,973 INFO L93 Difference]: Finished difference Result 70 states and 97 transitions. [2020-10-29 09:56:46,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-29 09:56:46,975 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-10-29 09:56:46,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:56:46,984 INFO L225 Difference]: With dead ends: 70 [2020-10-29 09:56:46,984 INFO L226 Difference]: Without dead ends: 33 [2020-10-29 09:56:46,988 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-29 09:56:47,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-29 09:56:47,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-29 09:56:47,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-29 09:56:47,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2020-10-29 09:56:47,037 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 20 [2020-10-29 09:56:47,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:56:47,037 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2020-10-29 09:56:47,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-29 09:56:47,038 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2020-10-29 09:56:47,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-29 09:56:47,039 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:56:47,039 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] [2020-10-29 09:56:47,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 09:56:47,040 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:56:47,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:56:47,041 INFO L82 PathProgramCache]: Analyzing trace with hash -120064893, now seen corresponding path program 1 times [2020-10-29 09:56:47,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:56:47,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [947160419] [2020-10-29 09:56:47,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:56:47,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:56:47,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:56:47,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:56:47,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:56:47,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-29 09:56:47,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:56:47,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 742 [2020-10-29 09:56:47,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:56:47,812 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:56:47,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:56:47,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 09:56:47,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 09:56:47,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:56:47,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:56:47,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:56:47,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:56:47,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:56:47,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:56:47,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:56:47,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:56:47,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:56:47,892 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:56:47,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:56:47,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:56:47,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:56:47,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:56:47,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:56:47,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [947160419] [2020-10-29 09:56:47,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:56:47,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 09:56:47,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812044293] [2020-10-29 09:56:47,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 09:56:47,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:56:47,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 09:56:47,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:56:47,903 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 6 states. [2020-10-29 09:56:48,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:56:48,158 INFO L93 Difference]: Finished difference Result 82 states and 102 transitions. [2020-10-29 09:56:48,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 09:56:48,159 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-29 09:56:48,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:56:48,162 INFO L225 Difference]: With dead ends: 82 [2020-10-29 09:56:48,162 INFO L226 Difference]: Without dead ends: 49 [2020-10-29 09:56:48,163 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:56:48,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-29 09:56:48,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 35. [2020-10-29 09:56:48,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-29 09:56:48,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2020-10-29 09:56:48,178 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 20 [2020-10-29 09:56:48,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:56:48,178 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2020-10-29 09:56:48,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 09:56:48,178 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2020-10-29 09:56:48,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-29 09:56:48,180 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:56:48,180 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] [2020-10-29 09:56:48,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 09:56:48,180 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:56:48,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:56:48,181 INFO L82 PathProgramCache]: Analyzing trace with hash -8333369, now seen corresponding path program 1 times [2020-10-29 09:56:48,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:56:48,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1565213779] [2020-10-29 09:56:48,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:56:48,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:56:48,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:56:48,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:56:48,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:56:48,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-29 09:56:48,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:56:48,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 451 [2020-10-29 09:56:48,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:56:48,658 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:56:48,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:56:48,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 09:56:48,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-29 09:56:48,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:56:48,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:56:48,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:56:48,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:56:48,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:56:48,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:56:48,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:56:48,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 09:56:48,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:56:48,968 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:56:48,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:56:48,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:56:48,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 09:56:48,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:56:48,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:56:48,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1565213779] [2020-10-29 09:56:48,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:56:48,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:56:48,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958830080] [2020-10-29 09:56:48,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:56:48,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:56:48,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:56:48,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:56:48,981 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 15 states. [2020-10-29 09:56:50,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:56:50,738 INFO L93 Difference]: Finished difference Result 120 states and 150 transitions. [2020-10-29 09:56:50,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-29 09:56:50,741 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 26 [2020-10-29 09:56:50,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:56:50,744 INFO L225 Difference]: With dead ends: 120 [2020-10-29 09:56:50,744 INFO L226 Difference]: Without dead ends: 117 [2020-10-29 09:56:50,746 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=344, Invalid=1378, Unknown=0, NotChecked=0, Total=1722 [2020-10-29 09:56:50,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-29 09:56:50,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 55. [2020-10-29 09:56:50,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-29 09:56:50,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2020-10-29 09:56:50,763 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 26 [2020-10-29 09:56:50,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:56:50,763 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2020-10-29 09:56:50,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:56:50,763 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2020-10-29 09:56:50,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-29 09:56:50,764 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:56:50,765 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] [2020-10-29 09:56:50,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 09:56:50,765 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:56:50,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:56:50,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1580014533, now seen corresponding path program 1 times [2020-10-29 09:56:50,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:56:50,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1508965820] [2020-10-29 09:56:50,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:56:50,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:56:50,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:56:51,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:56:51,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:56:51,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-29 09:56:51,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:56:51,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 583 [2020-10-29 09:56:51,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:56:51,390 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:56:51,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:56:51,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 09:56:51,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 09:56:51,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:56:51,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:56:51,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:56:51,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:56:51,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:56:51,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:56:51,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:56:51,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 09:56:51,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:56:51,508 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:56:51,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:56:51,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:56:51,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:56:51,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:56:51,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 09:56:51,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1508965820] [2020-10-29 09:56:51,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:56:51,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:56:51,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650553047] [2020-10-29 09:56:51,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:56:51,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:56:51,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:56:51,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:56:51,517 INFO L87 Difference]: Start difference. First operand 55 states and 66 transitions. Second operand 9 states. [2020-10-29 09:56:51,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:56:51,953 INFO L93 Difference]: Finished difference Result 113 states and 139 transitions. [2020-10-29 09:56:51,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:56:51,957 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-10-29 09:56:51,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:56:51,961 INFO L225 Difference]: With dead ends: 113 [2020-10-29 09:56:51,961 INFO L226 Difference]: Without dead ends: 110 [2020-10-29 09:56:51,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:56:51,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-29 09:56:51,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 61. [2020-10-29 09:56:51,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-29 09:56:51,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 76 transitions. [2020-10-29 09:56:51,980 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 76 transitions. Word has length 26 [2020-10-29 09:56:51,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:56:51,980 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 76 transitions. [2020-10-29 09:56:51,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:56:51,980 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 76 transitions. [2020-10-29 09:56:51,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-29 09:56:51,981 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:56:51,982 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] [2020-10-29 09:56:51,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 09:56:51,982 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:56:51,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:56:51,983 INFO L82 PathProgramCache]: Analyzing trace with hash 446340090, now seen corresponding path program 2 times [2020-10-29 09:56:51,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:56:51,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [260524428] [2020-10-29 09:56:51,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:56:51,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:56:52,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:56:52,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:56:52,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:56:52,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-29 09:56:52,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:56:52,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 326 [2020-10-29 09:56:52,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:56:52,327 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:56:52,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:56:52,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 09:56:52,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-29 09:56:52,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:56:52,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:56:52,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:56:52,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:56:52,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:56:52,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:56:52,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:56:52,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 09:56:52,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:56:52,444 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:56:52,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:56:52,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:56:52,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:56:52,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:56:52,455 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:56:52,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [260524428] [2020-10-29 09:56:52,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:56:52,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:56:52,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758844138] [2020-10-29 09:56:52,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:56:52,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:56:52,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:56:52,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:56:52,459 INFO L87 Difference]: Start difference. First operand 61 states and 76 transitions. Second operand 8 states. [2020-10-29 09:56:52,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:56:52,785 INFO L93 Difference]: Finished difference Result 201 states and 262 transitions. [2020-10-29 09:56:52,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:56:52,786 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2020-10-29 09:56:52,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:56:52,788 INFO L225 Difference]: With dead ends: 201 [2020-10-29 09:56:52,788 INFO L226 Difference]: Without dead ends: 142 [2020-10-29 09:56:52,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:56:52,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-29 09:56:52,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 93. [2020-10-29 09:56:52,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-29 09:56:52,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 119 transitions. [2020-10-29 09:56:52,830 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 119 transitions. Word has length 29 [2020-10-29 09:56:52,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:56:52,831 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 119 transitions. [2020-10-29 09:56:52,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:56:52,831 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 119 transitions. [2020-10-29 09:56:52,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-29 09:56:52,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:56:52,837 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:56:52,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 09:56:52,838 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:56:52,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:56:52,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1190099693, now seen corresponding path program 1 times [2020-10-29 09:56:52,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:56:52,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1955419936] [2020-10-29 09:56:52,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:56:52,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:56:52,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:56:52,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:56:53,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:56:53,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-29 09:56:53,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:56:53,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 431 [2020-10-29 09:56:53,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:56:53,325 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:56:53,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:56:53,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-29 09:56:53,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-29 09:56:53,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 09:56:53,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:56:53,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:56:53,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:56:53,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:56:53,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:56:53,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:56:53,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 09:56:53,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:56:53,404 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:56:53,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:56:53,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:56:53,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:56:53,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:56:53,410 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 09:56:53,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1955419936] [2020-10-29 09:56:53,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:56:53,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 09:56:53,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32797547] [2020-10-29 09:56:53,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 09:56:53,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:56:53,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 09:56:53,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:56:53,416 INFO L87 Difference]: Start difference. First operand 93 states and 119 transitions. Second operand 6 states. [2020-10-29 09:56:53,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:56:53,650 INFO L93 Difference]: Finished difference Result 151 states and 191 transitions. [2020-10-29 09:56:53,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 09:56:53,652 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-10-29 09:56:53,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:56:53,654 INFO L225 Difference]: With dead ends: 151 [2020-10-29 09:56:53,654 INFO L226 Difference]: Without dead ends: 129 [2020-10-29 09:56:53,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:56:53,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-29 09:56:53,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 110. [2020-10-29 09:56:53,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-29 09:56:53,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 142 transitions. [2020-10-29 09:56:53,714 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 142 transitions. Word has length 29 [2020-10-29 09:56:53,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:56:53,714 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 142 transitions. [2020-10-29 09:56:53,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 09:56:53,714 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 142 transitions. [2020-10-29 09:56:53,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-29 09:56:53,717 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:56:53,717 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:56:53,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 09:56:53,718 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:56:53,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:56:53,719 INFO L82 PathProgramCache]: Analyzing trace with hash 474748432, now seen corresponding path program 1 times [2020-10-29 09:56:53,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:56:53,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [489212656] [2020-10-29 09:56:53,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:56:53,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:56:53,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:56:53,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:56:53,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-29 09:56:53,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:56:53,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 183 [2020-10-29 09:56:53,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:56:53,927 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:56:53,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:56:53,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 09:56:53,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-29 09:56:53,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:56:53,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:56:53,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:56:53,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:56:54,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:56:54,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:56:54,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:56:54,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:56:54,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:56:54,004 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:56:54,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:56:54,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:56:54,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:56:54,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:56:54,010 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-29 09:56:54,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [489212656] [2020-10-29 09:56:54,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:56:54,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:56:54,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844142234] [2020-10-29 09:56:54,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:56:54,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:56:54,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:56:54,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:56:54,014 INFO L87 Difference]: Start difference. First operand 110 states and 142 transitions. Second operand 4 states. [2020-10-29 09:56:54,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:56:54,120 INFO L93 Difference]: Finished difference Result 190 states and 244 transitions. [2020-10-29 09:56:54,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:56:54,121 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-10-29 09:56:54,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:56:54,123 INFO L225 Difference]: With dead ends: 190 [2020-10-29 09:56:54,123 INFO L226 Difference]: Without dead ends: 92 [2020-10-29 09:56:54,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:56:54,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-29 09:56:54,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2020-10-29 09:56:54,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-29 09:56:54,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 114 transitions. [2020-10-29 09:56:54,148 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 114 transitions. Word has length 32 [2020-10-29 09:56:54,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:56:54,149 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 114 transitions. [2020-10-29 09:56:54,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:56:54,149 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 114 transitions. [2020-10-29 09:56:54,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-29 09:56:54,151 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:56:54,152 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:56:54,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 09:56:54,152 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:56:54,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:56:54,153 INFO L82 PathProgramCache]: Analyzing trace with hash -2014780530, now seen corresponding path program 1 times [2020-10-29 09:56:54,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:56:54,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1375300645] [2020-10-29 09:56:54,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:56:54,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:56:54,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:56:54,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:56:57,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:56:57,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-29 09:56:57,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:56:57,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3167 [2020-10-29 09:56:57,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:56:57,394 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:56:57,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:56:57,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 09:56:57,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-29 09:56:57,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:56:57,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:56:57,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:56:57,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:56:57,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:56:57,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:56:57,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:56:57,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:56:57,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:56:57,720 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:56:57,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:56:57,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:56:57,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:56:57,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:56:57,731 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 09:56:57,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1375300645] [2020-10-29 09:56:57,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:56:57,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:56:57,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23394443] [2020-10-29 09:56:57,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:56:57,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:56:57,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:56:57,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:56:57,736 INFO L87 Difference]: Start difference. First operand 91 states and 114 transitions. Second operand 12 states. [2020-10-29 09:56:58,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:56:58,668 INFO L93 Difference]: Finished difference Result 253 states and 324 transitions. [2020-10-29 09:56:58,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 09:56:58,669 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-29 09:56:58,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:56:58,673 INFO L225 Difference]: With dead ends: 253 [2020-10-29 09:56:58,673 INFO L226 Difference]: Without dead ends: 234 [2020-10-29 09:56:58,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:56:58,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-10-29 09:56:58,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 117. [2020-10-29 09:56:58,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-29 09:56:58,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 154 transitions. [2020-10-29 09:56:58,711 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 154 transitions. Word has length 32 [2020-10-29 09:56:58,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:56:58,712 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 154 transitions. [2020-10-29 09:56:58,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:56:58,712 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 154 transitions. [2020-10-29 09:56:58,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-29 09:56:58,715 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:56:58,715 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, 1, 1, 1, 1] [2020-10-29 09:56:58,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 09:56:58,715 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:56:58,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:56:58,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1967977502, now seen corresponding path program 2 times [2020-10-29 09:56:58,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:56:58,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1171475671] [2020-10-29 09:56:58,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:56:58,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:56:58,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:56:58,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:57:00,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:57:00,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:57:03,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:57:03,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-29 09:57:03,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:57:03,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-29 09:57:03,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:57:03,755 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:57:03,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:57:03,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 09:57:03,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-29 09:57:03,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:57:04,204 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 45 [2020-10-29 09:57:04,380 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 41 [2020-10-29 09:57:04,675 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 52 [2020-10-29 09:57:04,958 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 56 [2020-10-29 09:57:05,141 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 42 [2020-10-29 09:57:05,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:57:05,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:57:05,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:57:05,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:57:05,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:57:05,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:57:05,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:57:05,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:57:05,376 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:57:05,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:57:05,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:57:05,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:57:05,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:57:05,392 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:57:05,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1171475671] [2020-10-29 09:57:05,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:57:05,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:57:05,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759162471] [2020-10-29 09:57:05,393 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:57:05,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:57:05,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:57:05,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:57:05,395 INFO L87 Difference]: Start difference. First operand 117 states and 154 transitions. Second operand 14 states. [2020-10-29 09:57:05,584 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2020-10-29 09:57:05,839 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2020-10-29 09:57:05,990 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2020-10-29 09:57:06,440 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2020-10-29 09:57:06,704 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2020-10-29 09:57:07,033 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 64 [2020-10-29 09:57:07,399 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2020-10-29 09:57:07,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:57:07,871 INFO L93 Difference]: Finished difference Result 270 states and 349 transitions. [2020-10-29 09:57:07,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-29 09:57:07,872 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2020-10-29 09:57:07,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:57:07,874 INFO L225 Difference]: With dead ends: 270 [2020-10-29 09:57:07,874 INFO L226 Difference]: Without dead ends: 226 [2020-10-29 09:57:07,875 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2020-10-29 09:57:07,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-10-29 09:57:07,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 155. [2020-10-29 09:57:07,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-29 09:57:07,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 205 transitions. [2020-10-29 09:57:07,909 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 205 transitions. Word has length 35 [2020-10-29 09:57:07,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:57:07,910 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 205 transitions. [2020-10-29 09:57:07,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:57:07,910 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 205 transitions. [2020-10-29 09:57:07,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-29 09:57:07,911 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:57:07,911 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:57:07,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 09:57:07,918 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:57:07,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:57:07,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1150329052, now seen corresponding path program 1 times [2020-10-29 09:57:07,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:57:07,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [969715920] [2020-10-29 09:57:07,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:57:07,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:57:07,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:57:08,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:57:09,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:57:10,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:57:12,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:57:12,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:57:12,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-29 09:57:12,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 09:57:12,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-29 09:57:12,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:57:12,960 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:57:12,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:57:12,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 09:57:12,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-29 09:57:12,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:57:13,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:57:13,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:57:13,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:57:13,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:57:13,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:57:13,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:57:13,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:57:13,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:57:13,372 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:57:13,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:57:13,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:57:13,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:57:13,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:57:13,382 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 09:57:13,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [969715920] [2020-10-29 09:57:13,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:57:13,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:57:13,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59880574] [2020-10-29 09:57:13,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:57:13,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:57:13,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:57:13,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:57:13,386 INFO L87 Difference]: Start difference. First operand 155 states and 205 transitions. Second operand 13 states. [2020-10-29 09:57:14,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:57:14,256 INFO L93 Difference]: Finished difference Result 212 states and 270 transitions. [2020-10-29 09:57:14,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 09:57:14,257 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-10-29 09:57:14,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:57:14,260 INFO L225 Difference]: With dead ends: 212 [2020-10-29 09:57:14,260 INFO L226 Difference]: Without dead ends: 189 [2020-10-29 09:57:14,261 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2020-10-29 09:57:14,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-29 09:57:14,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 158. [2020-10-29 09:57:14,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-29 09:57:14,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 209 transitions. [2020-10-29 09:57:14,285 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 209 transitions. Word has length 35 [2020-10-29 09:57:14,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:57:14,285 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 209 transitions. [2020-10-29 09:57:14,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:57:14,286 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 209 transitions. [2020-10-29 09:57:14,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-29 09:57:14,286 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:57:14,286 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:57:14,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 09:57:14,287 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:57:14,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:57:14,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1232123927, now seen corresponding path program 1 times [2020-10-29 09:57:14,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:57:14,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [192015729] [2020-10-29 09:57:14,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:57:14,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:57:14,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:57:14,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:57:14,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:57:15,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:57:16,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:57:16,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:57:16,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:57:19,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:57:19,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-29 09:57:19,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 09:57:19,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-29 09:57:19,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:57:19,304 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:57:19,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:57:19,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 09:57:19,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-29 09:57:19,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:57:19,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:57:19,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:57:19,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:57:19,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:57:19,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:57:19,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:57:19,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:57:19,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:57:19,876 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:57:19,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:57:19,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:57:19,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:57:19,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:57:19,888 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 09:57:19,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [192015729] [2020-10-29 09:57:19,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:57:19,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:57:19,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541924200] [2020-10-29 09:57:19,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:57:19,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:57:19,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:57:19,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:57:19,890 INFO L87 Difference]: Start difference. First operand 158 states and 209 transitions. Second operand 13 states. [2020-10-29 09:57:21,333 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 44 [2020-10-29 09:57:21,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:57:21,818 INFO L93 Difference]: Finished difference Result 332 states and 437 transitions. [2020-10-29 09:57:21,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 09:57:21,819 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-10-29 09:57:21,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:57:21,822 INFO L225 Difference]: With dead ends: 332 [2020-10-29 09:57:21,822 INFO L226 Difference]: Without dead ends: 313 [2020-10-29 09:57:21,825 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2020-10-29 09:57:21,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-10-29 09:57:21,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 161. [2020-10-29 09:57:21,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-29 09:57:21,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 215 transitions. [2020-10-29 09:57:21,861 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 215 transitions. Word has length 35 [2020-10-29 09:57:21,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:57:21,863 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 215 transitions. [2020-10-29 09:57:21,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:57:21,863 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 215 transitions. [2020-10-29 09:57:21,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-29 09:57:21,864 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:57:21,864 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:57:21,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 09:57:21,864 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:57:21,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:57:21,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1493845797, now seen corresponding path program 3 times [2020-10-29 09:57:21,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:57:21,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1130761916] [2020-10-29 09:57:21,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:57:21,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:57:21,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:57:22,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:57:24,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:57:26,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:57:26,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-29 09:57:26,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:57:26,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 09:57:26,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:57:26,915 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:57:26,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:57:26,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 09:57:26,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 09:57:26,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:57:27,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:57:27,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:57:27,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:57:27,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:57:27,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:57:27,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:57:27,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:57:27,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:57:27,606 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:57:27,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:57:27,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:57:27,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:57:27,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:57:27,620 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-29 09:57:27,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1130761916] [2020-10-29 09:57:27,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:57:27,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:57:27,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709613505] [2020-10-29 09:57:27,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:57:27,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:57:27,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:57:27,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:57:27,622 INFO L87 Difference]: Start difference. First operand 161 states and 215 transitions. Second operand 15 states. [2020-10-29 09:57:30,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:57:30,332 INFO L93 Difference]: Finished difference Result 458 states and 600 transitions. [2020-10-29 09:57:30,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-29 09:57:30,334 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2020-10-29 09:57:30,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:57:30,338 INFO L225 Difference]: With dead ends: 458 [2020-10-29 09:57:30,338 INFO L226 Difference]: Without dead ends: 430 [2020-10-29 09:57:30,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=246, Invalid=1086, Unknown=0, NotChecked=0, Total=1332 [2020-10-29 09:57:30,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2020-10-29 09:57:30,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 211. [2020-10-29 09:57:30,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-10-29 09:57:30,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 292 transitions. [2020-10-29 09:57:30,380 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 292 transitions. Word has length 38 [2020-10-29 09:57:30,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:57:30,380 INFO L481 AbstractCegarLoop]: Abstraction has 211 states and 292 transitions. [2020-10-29 09:57:30,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:57:30,380 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 292 transitions. [2020-10-29 09:57:30,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-29 09:57:30,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:57:30,381 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:57:30,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 09:57:30,382 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:57:30,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:57:30,382 INFO L82 PathProgramCache]: Analyzing trace with hash -454010482, now seen corresponding path program 4 times [2020-10-29 09:57:30,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:57:30,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2127618250] [2020-10-29 09:57:30,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:57:30,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:57:30,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:57:30,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:57:31,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:57:31,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:57:33,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:57:35,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:57:35,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-29 09:57:35,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 09:57:35,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-29 09:57:35,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:57:35,410 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:57:35,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:57:35,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 09:57:35,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-29 09:57:35,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:57:35,616 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 36 [2020-10-29 09:57:35,760 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 34 [2020-10-29 09:57:35,951 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 42 [2020-10-29 09:57:36,135 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 53 [2020-10-29 09:57:36,274 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2020-10-29 09:57:36,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:57:36,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:57:36,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:57:36,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:57:36,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:57:36,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:57:36,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:57:36,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:57:36,637 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:57:36,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:57:36,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:57:36,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:57:36,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:57:36,655 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:57:36,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2127618250] [2020-10-29 09:57:36,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:57:36,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:57:36,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701624402] [2020-10-29 09:57:36,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:57:36,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:57:36,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:57:36,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:57:36,658 INFO L87 Difference]: Start difference. First operand 211 states and 292 transitions. Second operand 15 states. [2020-10-29 09:57:37,194 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 54 [2020-10-29 09:57:37,424 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 70 [2020-10-29 09:57:37,638 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 64 [2020-10-29 09:57:37,820 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 48 [2020-10-29 09:57:38,058 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2020-10-29 09:57:38,200 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2020-10-29 09:57:38,429 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-10-29 09:57:38,625 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2020-10-29 09:57:38,950 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-10-29 09:57:39,117 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2020-10-29 09:57:39,552 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2020-10-29 09:57:39,717 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 52 [2020-10-29 09:57:39,926 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2020-10-29 09:57:40,094 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2020-10-29 09:57:40,261 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2020-10-29 09:57:40,458 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-10-29 09:57:40,634 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 37 [2020-10-29 09:57:41,555 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2020-10-29 09:57:42,550 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-10-29 09:57:43,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:57:43,210 INFO L93 Difference]: Finished difference Result 612 states and 834 transitions. [2020-10-29 09:57:43,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-29 09:57:43,211 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2020-10-29 09:57:43,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:57:43,215 INFO L225 Difference]: With dead ends: 612 [2020-10-29 09:57:43,215 INFO L226 Difference]: Without dead ends: 518 [2020-10-29 09:57:43,217 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 889 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=476, Invalid=2494, Unknown=0, NotChecked=0, Total=2970 [2020-10-29 09:57:43,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2020-10-29 09:57:43,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 250. [2020-10-29 09:57:43,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-10-29 09:57:43,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 352 transitions. [2020-10-29 09:57:43,267 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 352 transitions. Word has length 38 [2020-10-29 09:57:43,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:57:43,267 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 352 transitions. [2020-10-29 09:57:43,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:57:43,267 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 352 transitions. [2020-10-29 09:57:43,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-29 09:57:43,268 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:57:43,269 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:57:43,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 09:57:43,269 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:57:43,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:57:43,270 INFO L82 PathProgramCache]: Analyzing trace with hash 2035518480, now seen corresponding path program 2 times [2020-10-29 09:57:43,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:57:43,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1951854578] [2020-10-29 09:57:43,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:57:43,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:57:43,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:57:43,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:57:44,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:57:46,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:57:46,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-29 09:57:46,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:57:46,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3249 [2020-10-29 09:57:46,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:57:46,535 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:57:46,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:57:46,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 09:57:46,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 09:57:46,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:57:47,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:57:47,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:57:47,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:57:47,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:57:47,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:57:47,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:57:47,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:57:47,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:57:47,159 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:57:47,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:57:47,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:57:47,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:57:47,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:57:47,168 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 09:57:47,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1951854578] [2020-10-29 09:57:47,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:57:47,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 09:57:47,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346310481] [2020-10-29 09:57:47,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 09:57:47,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:57:47,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 09:57:47,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:57:47,170 INFO L87 Difference]: Start difference. First operand 250 states and 352 transitions. Second operand 16 states. [2020-10-29 09:57:49,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:57:49,968 INFO L93 Difference]: Finished difference Result 563 states and 769 transitions. [2020-10-29 09:57:49,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-29 09:57:49,968 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 38 [2020-10-29 09:57:49,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:57:49,972 INFO L225 Difference]: With dead ends: 563 [2020-10-29 09:57:49,972 INFO L226 Difference]: Without dead ends: 534 [2020-10-29 09:57:49,973 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=266, Invalid=1216, Unknown=0, NotChecked=0, Total=1482 [2020-10-29 09:57:49,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2020-10-29 09:57:50,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 320. [2020-10-29 09:57:50,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2020-10-29 09:57:50,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 466 transitions. [2020-10-29 09:57:50,039 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 466 transitions. Word has length 38 [2020-10-29 09:57:50,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:57:50,039 INFO L481 AbstractCegarLoop]: Abstraction has 320 states and 466 transitions. [2020-10-29 09:57:50,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 09:57:50,039 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 466 transitions. [2020-10-29 09:57:50,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-29 09:57:50,040 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:57:50,041 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, 1, 1, 1, 1, 1] [2020-10-29 09:57:50,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 09:57:50,041 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:57:50,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:57:50,041 INFO L82 PathProgramCache]: Analyzing trace with hash 713387491, now seen corresponding path program 2 times [2020-10-29 09:57:50,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:57:50,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [437848316] [2020-10-29 09:57:50,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:57:50,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:57:50,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:57:50,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:57:50,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:57:50,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:57:50,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:57:51,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:57:52,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:57:55,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:57:55,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-29 09:57:55,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 09:57:55,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-29 09:57:55,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:57:55,067 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:57:55,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:57:55,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 09:57:55,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 09:57:55,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:57:55,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:57:55,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:57:55,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:57:55,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:57:55,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:57:55,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:57:55,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:57:55,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:57:55,160 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:57:55,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:57:55,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:57:55,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:57:55,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:57:55,164 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-29 09:57:55,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [437848316] [2020-10-29 09:57:55,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:57:55,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:57:55,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393633970] [2020-10-29 09:57:55,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:57:55,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:57:55,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:57:55,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:57:55,167 INFO L87 Difference]: Start difference. First operand 320 states and 466 transitions. Second operand 8 states. [2020-10-29 09:57:55,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:57:55,627 INFO L93 Difference]: Finished difference Result 363 states and 513 transitions. [2020-10-29 09:57:55,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:57:55,628 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 38 [2020-10-29 09:57:55,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:57:55,630 INFO L225 Difference]: With dead ends: 363 [2020-10-29 09:57:55,630 INFO L226 Difference]: Without dead ends: 344 [2020-10-29 09:57:55,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:57:55,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2020-10-29 09:57:55,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 320. [2020-10-29 09:57:55,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2020-10-29 09:57:55,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 463 transitions. [2020-10-29 09:57:55,708 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 463 transitions. Word has length 38 [2020-10-29 09:57:55,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:57:55,710 INFO L481 AbstractCegarLoop]: Abstraction has 320 states and 463 transitions. [2020-10-29 09:57:55,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:57:55,710 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 463 transitions. [2020-10-29 09:57:55,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-29 09:57:55,712 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:57:55,712 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] [2020-10-29 09:57:55,712 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 09:57:55,712 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:57:55,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:57:55,713 INFO L82 PathProgramCache]: Analyzing trace with hash -546734553, now seen corresponding path program 1 times [2020-10-29 09:57:55,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:57:55,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [535652673] [2020-10-29 09:57:55,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:57:55,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:57:55,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:57:55,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:57:55,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:57:56,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:57:56,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-29 09:57:56,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:57:56,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 854 [2020-10-29 09:57:56,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:57:56,590 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:57:56,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:57:56,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 09:57:56,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-29 09:57:56,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:57:56,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:57:56,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:57:56,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:57:56,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:57:56,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:57:56,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:57:56,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:57:56,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:57:56,766 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:57:56,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:57:56,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:57:56,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 09:57:56,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:57:56,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-29 09:57:56,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:57:56,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:57:56,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:57:56,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 09:57:56,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:57:56,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 09:57:56,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:57:56,773 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:57:56,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:57:56,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:57:56,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 09:57:56,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:57:56,779 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-29 09:57:56,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [535652673] [2020-10-29 09:57:56,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:57:56,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:57:56,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195588859] [2020-10-29 09:57:56,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:57:56,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:57:56,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:57:56,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:57:56,781 INFO L87 Difference]: Start difference. First operand 320 states and 463 transitions. Second operand 12 states. [2020-10-29 09:57:57,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:57:57,830 INFO L93 Difference]: Finished difference Result 555 states and 809 transitions. [2020-10-29 09:57:57,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:57:57,831 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-10-29 09:57:57,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:57:57,837 INFO L225 Difference]: With dead ends: 555 [2020-10-29 09:57:57,837 INFO L226 Difference]: Without dead ends: 552 [2020-10-29 09:57:57,839 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2020-10-29 09:57:57,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2020-10-29 09:57:57,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 374. [2020-10-29 09:57:57,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 374 states. [2020-10-29 09:57:57,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 541 transitions. [2020-10-29 09:57:57,929 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 541 transitions. Word has length 40 [2020-10-29 09:57:57,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:57:57,930 INFO L481 AbstractCegarLoop]: Abstraction has 374 states and 541 transitions. [2020-10-29 09:57:57,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:57:57,930 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 541 transitions. [2020-10-29 09:57:57,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-29 09:57:57,932 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:57:57,932 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:57:57,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 09:57:57,933 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:57:57,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:57:57,933 INFO L82 PathProgramCache]: Analyzing trace with hash -37261463, now seen corresponding path program 1 times [2020-10-29 09:57:57,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:57:57,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1482343198] [2020-10-29 09:57:57,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:57:57,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:57:57,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:57:57,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:57:58,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:57:58,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:57:58,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:57:58,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:57:59,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:57:59,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-29 09:57:59,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 09:57:59,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1176 [2020-10-29 09:57:59,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:57:59,126 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:57:59,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:57:59,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 09:57:59,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 09:57:59,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:57:59,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:57:59,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:57:59,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:57:59,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:57:59,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:57:59,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:57:59,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:57:59,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:57:59,224 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:57:59,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:57:59,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:57:59,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:57:59,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:57:59,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-29 09:57:59,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:57:59,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:57:59,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:57:59,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 09:57:59,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:57:59,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:57:59,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:57:59,232 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:57:59,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:57:59,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:57:59,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 09:57:59,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:57:59,236 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-29 09:57:59,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1482343198] [2020-10-29 09:57:59,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:57:59,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:57:59,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236738659] [2020-10-29 09:57:59,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:57:59,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:57:59,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:57:59,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:57:59,238 INFO L87 Difference]: Start difference. First operand 374 states and 541 transitions. Second operand 9 states. [2020-10-29 09:57:59,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:57:59,724 INFO L93 Difference]: Finished difference Result 572 states and 827 transitions. [2020-10-29 09:57:59,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:57:59,725 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 40 [2020-10-29 09:57:59,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:57:59,728 INFO L225 Difference]: With dead ends: 572 [2020-10-29 09:57:59,731 INFO L226 Difference]: Without dead ends: 313 [2020-10-29 09:57:59,732 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:57:59,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-10-29 09:57:59,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 219. [2020-10-29 09:57:59,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2020-10-29 09:57:59,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 303 transitions. [2020-10-29 09:57:59,797 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 303 transitions. Word has length 40 [2020-10-29 09:57:59,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:57:59,797 INFO L481 AbstractCegarLoop]: Abstraction has 219 states and 303 transitions. [2020-10-29 09:57:59,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:57:59,797 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 303 transitions. [2020-10-29 09:57:59,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-29 09:57:59,798 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:57:59,799 INFO L422 BasicCegarLoop]: trace histogram [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, 1] [2020-10-29 09:57:59,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 09:57:59,799 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:57:59,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:57:59,800 INFO L82 PathProgramCache]: Analyzing trace with hash -794580043, now seen corresponding path program 5 times [2020-10-29 09:57:59,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:57:59,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1067738044] [2020-10-29 09:57:59,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:57:59,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:57:59,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:57:59,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:58:02,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:58:02,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:58:03,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:58:04,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:58:04,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:58:04,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-29 09:58:04,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 09:58:04,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5105 [2020-10-29 09:58:04,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:58:04,926 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:58:04,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 09:58:04,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 09:58:04,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-29 09:58:04,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:58:05,724 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 71 [2020-10-29 09:58:05,933 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 63 [2020-10-29 09:58:06,084 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 53 [2020-10-29 09:58:06,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:58:06,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:58:06,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:58:06,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:58:06,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:58:06,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:58:06,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:58:06,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:58:06,687 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:58:06,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:58:06,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:58:06,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:58:06,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:58:06,702 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 09:58:06,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1067738044] [2020-10-29 09:58:06,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:58:06,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 09:58:06,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140102628] [2020-10-29 09:58:06,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 09:58:06,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:58:06,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 09:58:06,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:58:06,704 INFO L87 Difference]: Start difference. First operand 219 states and 303 transitions. Second operand 17 states. [2020-10-29 09:58:07,045 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2020-10-29 09:58:07,654 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 48 [2020-10-29 09:58:07,833 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 53 [2020-10-29 09:58:08,136 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 69 [2020-10-29 09:58:08,297 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2020-10-29 09:58:08,459 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 57 [2020-10-29 09:58:08,623 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2020-10-29 09:58:08,807 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2020-10-29 09:58:09,023 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 58 [2020-10-29 09:58:09,191 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 60 [2020-10-29 09:58:09,470 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 85 [2020-10-29 09:58:09,641 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 58 [2020-10-29 09:58:10,272 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 66 [2020-10-29 09:58:10,496 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 64 [2020-10-29 09:58:10,696 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 64 [2020-10-29 09:58:10,888 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 60 [2020-10-29 09:58:11,091 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 68 [2020-10-29 09:58:11,320 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 67 [2020-10-29 09:58:11,684 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 65 [2020-10-29 09:58:11,870 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 65 [2020-10-29 09:58:12,183 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 52 [2020-10-29 09:58:12,665 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2020-10-29 09:58:13,124 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 75 [2020-10-29 09:58:13,358 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 72 [2020-10-29 09:58:13,601 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 73 [2020-10-29 09:58:13,980 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 92 [2020-10-29 09:58:14,146 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 54 [2020-10-29 09:58:14,350 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 63 [2020-10-29 09:58:14,534 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 63 [2020-10-29 09:58:14,809 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 91 [2020-10-29 09:58:15,093 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 85 [2020-10-29 09:58:15,428 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 77 [2020-10-29 09:58:15,696 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 82 [2020-10-29 09:58:16,121 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 78 [2020-10-29 09:58:16,390 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 83 [2020-10-29 09:58:16,795 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 56 [2020-10-29 09:58:17,032 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 64 [2020-10-29 09:58:17,246 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 63 [2020-10-29 09:58:17,472 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 60 [2020-10-29 09:58:17,693 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 61 [2020-10-29 09:58:18,289 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 67 [2020-10-29 09:58:18,627 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 63 [2020-10-29 09:58:18,877 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 60 [2020-10-29 09:58:19,127 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 61 [2020-10-29 09:58:19,305 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 71 [2020-10-29 09:58:19,918 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 70 [2020-10-29 09:58:20,151 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 62 [2020-10-29 09:58:20,578 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 85 [2020-10-29 09:58:20,764 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2020-10-29 09:58:21,180 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 80 [2020-10-29 09:58:21,465 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 76 [2020-10-29 09:58:21,698 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 81 [2020-10-29 09:58:22,218 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2020-10-29 09:58:22,643 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 65 [2020-10-29 09:58:22,844 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 59 [2020-10-29 09:58:23,301 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 72 [2020-10-29 09:58:23,484 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 73 [2020-10-29 09:58:23,907 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2020-10-29 09:58:24,413 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 78 [2020-10-29 09:58:24,648 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 70 [2020-10-29 09:58:24,879 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 68 [2020-10-29 09:58:25,118 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 78 [2020-10-29 09:58:25,559 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2020-10-29 09:58:25,810 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 82 [2020-10-29 09:58:26,040 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 78 [2020-10-29 09:58:26,290 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 83 [2020-10-29 09:58:26,539 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 72 [2020-10-29 09:58:26,783 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 77 [2020-10-29 09:58:27,101 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 83 [2020-10-29 09:58:27,427 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 88 [2020-10-29 09:58:27,714 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 71 [2020-10-29 09:58:27,898 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 63 [2020-10-29 09:58:28,173 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 83 [2020-10-29 09:58:28,519 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 88 [2020-10-29 09:58:28,830 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 60 [2020-10-29 09:58:28,984 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 61 [2020-10-29 09:58:29,151 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 55 [2020-10-29 09:58:29,381 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 66 [2020-10-29 09:58:29,605 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 66 [2020-10-29 09:58:30,198 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 66 [2020-10-29 09:58:30,474 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 79 [2020-10-29 09:58:30,833 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2020-10-29 09:58:31,210 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 84 [2020-10-29 09:58:31,561 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 89 [2020-10-29 09:58:31,897 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 82 [2020-10-29 09:58:32,191 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 87 [2020-10-29 09:58:32,526 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 67 [2020-10-29 09:58:32,733 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 65 [2020-10-29 09:58:33,007 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 67 [2020-10-29 09:58:34,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:58:34,960 INFO L93 Difference]: Finished difference Result 1116 states and 1486 transitions. [2020-10-29 09:58:34,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2020-10-29 09:58:34,961 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 41 [2020-10-29 09:58:34,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:58:34,968 INFO L225 Difference]: With dead ends: 1116 [2020-10-29 09:58:34,968 INFO L226 Difference]: Without dead ends: 1094 [2020-10-29 09:58:34,976 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9141 ImplicationChecksByTransitivity, 24.3s TimeCoverageRelationStatistics Valid=2495, Invalid=21375, Unknown=0, NotChecked=0, Total=23870 [2020-10-29 09:58:34,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2020-10-29 09:58:35,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 367. [2020-10-29 09:58:35,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 367 states. [2020-10-29 09:58:35,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 524 transitions. [2020-10-29 09:58:35,079 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 524 transitions. Word has length 41 [2020-10-29 09:58:35,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:58:35,079 INFO L481 AbstractCegarLoop]: Abstraction has 367 states and 524 transitions. [2020-10-29 09:58:35,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 09:58:35,079 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 524 transitions. [2020-10-29 09:58:35,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-29 09:58:35,080 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:58:35,080 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:58:35,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 09:58:35,081 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:58:35,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:58:35,081 INFO L82 PathProgramCache]: Analyzing trace with hash -35816928, now seen corresponding path program 3 times [2020-10-29 09:58:35,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:58:35,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1448712352] [2020-10-29 09:58:35,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:58:35,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:58:35,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:58:35,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:58:35,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:58:37,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:58:38,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:58:38,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-29 09:58:38,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:58:38,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3435 [2020-10-29 09:58:38,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:58:38,529 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:58:38,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 09:58:38,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 09:58:38,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-29 09:58:38,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:58:38,709 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 32 [2020-10-29 09:58:38,988 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 39 [2020-10-29 09:58:39,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:58:39,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:58:39,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:58:39,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:58:39,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:58:39,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:58:39,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:58:39,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:58:39,480 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:58:39,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:58:39,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:58:39,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:58:39,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:58:39,490 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-29 09:58:39,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1448712352] [2020-10-29 09:58:39,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:58:39,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 09:58:39,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179866105] [2020-10-29 09:58:39,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 09:58:39,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:58:39,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 09:58:39,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:58:39,492 INFO L87 Difference]: Start difference. First operand 367 states and 524 transitions. Second operand 18 states. [2020-10-29 09:58:41,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:58:41,422 INFO L93 Difference]: Finished difference Result 435 states and 603 transitions. [2020-10-29 09:58:41,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 09:58:41,423 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 41 [2020-10-29 09:58:41,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:58:41,426 INFO L225 Difference]: With dead ends: 435 [2020-10-29 09:58:41,426 INFO L226 Difference]: Without dead ends: 395 [2020-10-29 09:58:41,427 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2020-10-29 09:58:41,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2020-10-29 09:58:41,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 373. [2020-10-29 09:58:41,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 373 states. [2020-10-29 09:58:41,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 532 transitions. [2020-10-29 09:58:41,501 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 532 transitions. Word has length 41 [2020-10-29 09:58:41,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:58:41,501 INFO L481 AbstractCegarLoop]: Abstraction has 373 states and 532 transitions. [2020-10-29 09:58:41,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 09:58:41,502 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 532 transitions. [2020-10-29 09:58:41,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-29 09:58:41,502 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:58:41,502 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:58:41,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 09:58:41,503 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:58:41,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:58:41,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1614570588, now seen corresponding path program 4 times [2020-10-29 09:58:41,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:58:41,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2029213858] [2020-10-29 09:58:41,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:58:41,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:58:41,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:58:41,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:58:41,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:58:42,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:58:46,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:58:46,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-29 09:58:46,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:58:46,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4935 [2020-10-29 09:58:46,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:58:46,452 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:58:46,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:58:46,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-29 09:58:46,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-29 09:58:46,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:58:46,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:58:46,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:58:46,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:58:46,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:58:46,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:58:46,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:58:46,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:58:46,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:58:46,555 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:58:46,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:58:46,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:58:46,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:58:46,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:58:46,561 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-29 09:58:46,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2029213858] [2020-10-29 09:58:46,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:58:46,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:58:46,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018271047] [2020-10-29 09:58:46,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:58:46,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:58:46,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:58:46,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:58:46,564 INFO L87 Difference]: Start difference. First operand 373 states and 532 transitions. Second operand 8 states. [2020-10-29 09:58:47,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:58:47,333 INFO L93 Difference]: Finished difference Result 529 states and 727 transitions. [2020-10-29 09:58:47,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:58:47,334 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-10-29 09:58:47,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:58:47,338 INFO L225 Difference]: With dead ends: 529 [2020-10-29 09:58:47,338 INFO L226 Difference]: Without dead ends: 496 [2020-10-29 09:58:47,338 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:58:47,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2020-10-29 09:58:47,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 372. [2020-10-29 09:58:47,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2020-10-29 09:58:47,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 531 transitions. [2020-10-29 09:58:47,453 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 531 transitions. Word has length 41 [2020-10-29 09:58:47,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:58:47,454 INFO L481 AbstractCegarLoop]: Abstraction has 372 states and 531 transitions. [2020-10-29 09:58:47,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:58:47,454 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 531 transitions. [2020-10-29 09:58:47,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-29 09:58:47,455 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:58:47,455 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-10-29 09:58:47,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 09:58:47,455 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:58:47,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:58:47,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1307428608, now seen corresponding path program 2 times [2020-10-29 09:58:47,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:58:47,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1599857478] [2020-10-29 09:58:47,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:58:47,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:58:47,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:58:47,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:58:47,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:58:47,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:58:47,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:58:47,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:58:48,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:58:48,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:58:48,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-29 09:58:48,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 09:58:48,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1039 [2020-10-29 09:58:48,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:58:48,511 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:58:48,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:58:48,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 09:58:48,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-29 09:58:48,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:58:48,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:58:48,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:58:48,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:58:48,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:58:48,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:58:48,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:58:48,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 09:58:48,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:58:48,729 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:58:48,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:58:48,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:58:48,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 09:58:48,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:58:48,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-29 09:58:48,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:58:48,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:58:48,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:58:48,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 09:58:48,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:58:48,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:58:48,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:58:48,738 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:58:48,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:58:48,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:58:48,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 09:58:48,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:58:48,746 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-29 09:58:48,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1599857478] [2020-10-29 09:58:48,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:58:48,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:58:48,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583349241] [2020-10-29 09:58:48,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:58:48,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:58:48,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:58:48,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:58:48,749 INFO L87 Difference]: Start difference. First operand 372 states and 531 transitions. Second operand 13 states. [2020-10-29 09:58:50,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:58:50,052 INFO L93 Difference]: Finished difference Result 823 states and 1193 transitions. [2020-10-29 09:58:50,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:58:50,053 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 43 [2020-10-29 09:58:50,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:58:50,056 INFO L225 Difference]: With dead ends: 823 [2020-10-29 09:58:50,056 INFO L226 Difference]: Without dead ends: 574 [2020-10-29 09:58:50,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2020-10-29 09:58:50,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2020-10-29 09:58:50,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 327. [2020-10-29 09:58:50,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 327 states. [2020-10-29 09:58:50,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 461 transitions. [2020-10-29 09:58:50,183 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 461 transitions. Word has length 43 [2020-10-29 09:58:50,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:58:50,183 INFO L481 AbstractCegarLoop]: Abstraction has 327 states and 461 transitions. [2020-10-29 09:58:50,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:58:50,183 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 461 transitions. [2020-10-29 09:58:50,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-29 09:58:50,193 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:58:50,193 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1] [2020-10-29 09:58:50,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-29 09:58:50,193 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:58:50,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:58:50,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1210850461, now seen corresponding path program 5 times [2020-10-29 09:58:50,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:58:50,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [49877902] [2020-10-29 09:58:50,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:58:50,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:58:50,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:58:50,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:58:50,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:58:51,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:58:52,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:58:53,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:58:53,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:58:55,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:58:55,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-29 09:58:55,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 09:58:55,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5111 [2020-10-29 09:58:55,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:58:55,321 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:58:55,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:58:55,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-29 09:58:55,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-29 09:58:55,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:58:55,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:58:55,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:58:55,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:58:55,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:58:55,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:58:55,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:58:55,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:58:55,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:58:55,441 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:58:55,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:58:55,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:58:55,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:58:55,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:58:55,445 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-29 09:58:55,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [49877902] [2020-10-29 09:58:55,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:58:55,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:58:55,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169732347] [2020-10-29 09:58:55,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:58:55,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:58:55,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:58:55,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:58:55,446 INFO L87 Difference]: Start difference. First operand 327 states and 461 transitions. Second operand 10 states. [2020-10-29 09:58:56,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:58:56,379 INFO L93 Difference]: Finished difference Result 672 states and 905 transitions. [2020-10-29 09:58:56,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:58:56,382 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 44 [2020-10-29 09:58:56,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:58:56,386 INFO L225 Difference]: With dead ends: 672 [2020-10-29 09:58:56,386 INFO L226 Difference]: Without dead ends: 639 [2020-10-29 09:58:56,387 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:58:56,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2020-10-29 09:58:56,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 299. [2020-10-29 09:58:56,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2020-10-29 09:58:56,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 415 transitions. [2020-10-29 09:58:56,476 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 415 transitions. Word has length 44 [2020-10-29 09:58:56,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:58:56,476 INFO L481 AbstractCegarLoop]: Abstraction has 299 states and 415 transitions. [2020-10-29 09:58:56,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:58:56,476 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 415 transitions. [2020-10-29 09:58:56,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-29 09:58:56,477 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:58:56,478 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:58:56,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-29 09:58:56,478 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:58:56,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:58:56,478 INFO L82 PathProgramCache]: Analyzing trace with hash 542962209, now seen corresponding path program 3 times [2020-10-29 09:58:56,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:58:56,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1927745912] [2020-10-29 09:58:56,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:58:56,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:58:56,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:58:56,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:58:56,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:58:56,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:58:57,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:58:58,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:58:59,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:59:00,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:59:01,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:59:01,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:59:01,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:59:01,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-29 09:59:01,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-29 09:59:01,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-29 09:59:01,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:59:01,522 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:59:01,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:59:01,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 09:59:01,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-29 09:59:01,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:59:01,969 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 34 [2020-10-29 09:59:02,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:59:02,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:59:02,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:59:02,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:59:02,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:59:02,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:59:02,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:59:02,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:59:02,433 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:59:02,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:59:02,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:59:02,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:59:02,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:59:02,444 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-29 09:59:02,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1927745912] [2020-10-29 09:59:02,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:59:02,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 09:59:02,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119209685] [2020-10-29 09:59:02,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 09:59:02,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:59:02,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 09:59:02,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:59:02,446 INFO L87 Difference]: Start difference. First operand 299 states and 415 transitions. Second operand 16 states. [2020-10-29 09:59:02,879 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2020-10-29 09:59:04,500 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2020-10-29 09:59:05,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:59:05,700 INFO L93 Difference]: Finished difference Result 661 states and 869 transitions. [2020-10-29 09:59:05,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-29 09:59:05,701 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2020-10-29 09:59:05,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:59:05,705 INFO L225 Difference]: With dead ends: 661 [2020-10-29 09:59:05,705 INFO L226 Difference]: Without dead ends: 658 [2020-10-29 09:59:05,706 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=280, Invalid=1052, Unknown=0, NotChecked=0, Total=1332 [2020-10-29 09:59:05,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2020-10-29 09:59:05,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 347. [2020-10-29 09:59:05,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 347 states. [2020-10-29 09:59:05,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 486 transitions. [2020-10-29 09:59:05,800 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 486 transitions. Word has length 44 [2020-10-29 09:59:05,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:59:05,801 INFO L481 AbstractCegarLoop]: Abstraction has 347 states and 486 transitions. [2020-10-29 09:59:05,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 09:59:05,801 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 486 transitions. [2020-10-29 09:59:05,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-29 09:59:05,802 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:59:05,802 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, 1, 1, 1, 1, 1] [2020-10-29 09:59:05,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-29 09:59:05,802 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:59:05,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:59:05,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1492795408, now seen corresponding path program 1 times [2020-10-29 09:59:05,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:59:05,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1945513228] [2020-10-29 09:59:05,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:59:05,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:59:05,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:59:05,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:59:06,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:59:06,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-29 09:59:06,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:59:06,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 326 [2020-10-29 09:59:06,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:59:06,144 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:59:06,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:59:06,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-29 09:59:06,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 09:59:06,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:59:06,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:59:06,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:59:06,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:59:06,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:59:06,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:59:06,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:59:06,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:59:06,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:59:06,214 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:59:06,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:59:06,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:59:06,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:59:06,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:59:06,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-29 09:59:06,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:59:06,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:59:06,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:59:06,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 09:59:06,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:59:06,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 09:59:06,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:59:06,219 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:59:06,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:59:06,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 09:59:06,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:59:06,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:59:06,222 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-29 09:59:06,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1945513228] [2020-10-29 09:59:06,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:59:06,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 09:59:06,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167453047] [2020-10-29 09:59:06,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 09:59:06,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:59:06,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 09:59:06,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:59:06,224 INFO L87 Difference]: Start difference. First operand 347 states and 486 transitions. Second operand 6 states. [2020-10-29 09:59:06,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:59:06,654 INFO L93 Difference]: Finished difference Result 644 states and 908 transitions. [2020-10-29 09:59:06,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:59:06,655 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2020-10-29 09:59:06,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:59:06,658 INFO L225 Difference]: With dead ends: 644 [2020-10-29 09:59:06,658 INFO L226 Difference]: Without dead ends: 362 [2020-10-29 09:59:06,660 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:59:06,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-10-29 09:59:06,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 349. [2020-10-29 09:59:06,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 349 states. [2020-10-29 09:59:06,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 473 transitions. [2020-10-29 09:59:06,780 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 473 transitions. Word has length 46 [2020-10-29 09:59:06,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:59:06,780 INFO L481 AbstractCegarLoop]: Abstraction has 349 states and 473 transitions. [2020-10-29 09:59:06,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 09:59:06,780 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 473 transitions. [2020-10-29 09:59:06,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-29 09:59:06,781 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:59:06,782 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:59:06,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-29 09:59:06,782 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:59:06,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:59:06,782 INFO L82 PathProgramCache]: Analyzing trace with hash 148821389, now seen corresponding path program 3 times [2020-10-29 09:59:06,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:59:06,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1718393549] [2020-10-29 09:59:06,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:59:06,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:59:06,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:59:06,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:59:07,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:59:07,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:59:07,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-29 09:59:07,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:59:07,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 905 [2020-10-29 09:59:07,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:59:07,701 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:59:07,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:59:07,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 09:59:07,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 09:59:07,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:59:07,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:59:07,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:59:07,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:59:07,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:59:07,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:59:07,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:59:07,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:59:07,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:59:07,823 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:59:07,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:59:07,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:59:07,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:59:07,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:59:07,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-29 09:59:07,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:59:07,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:59:07,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:59:07,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 09:59:07,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:59:07,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:59:07,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:59:07,835 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:59:07,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:59:07,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:59:07,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 09:59:07,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:59:07,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-29 09:59:07,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:59:07,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:59:07,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:59:07,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 09:59:07,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:59:07,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:59:07,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:59:07,843 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:59:07,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:59:07,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:59:07,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 09:59:07,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:59:07,848 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-29 09:59:07,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1718393549] [2020-10-29 09:59:07,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:59:07,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:59:07,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474701559] [2020-10-29 09:59:07,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:59:07,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:59:07,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:59:07,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:59:07,850 INFO L87 Difference]: Start difference. First operand 349 states and 473 transitions. Second operand 10 states. [2020-10-29 09:59:08,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:59:08,787 INFO L93 Difference]: Finished difference Result 1229 states and 1712 transitions. [2020-10-29 09:59:08,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:59:08,788 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 48 [2020-10-29 09:59:08,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:59:08,795 INFO L225 Difference]: With dead ends: 1229 [2020-10-29 09:59:08,795 INFO L226 Difference]: Without dead ends: 942 [2020-10-29 09:59:08,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:59:08,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 942 states. [2020-10-29 09:59:09,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 942 to 689. [2020-10-29 09:59:09,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 689 states. [2020-10-29 09:59:09,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 956 transitions. [2020-10-29 09:59:09,015 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 956 transitions. Word has length 48 [2020-10-29 09:59:09,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:59:09,016 INFO L481 AbstractCegarLoop]: Abstraction has 689 states and 956 transitions. [2020-10-29 09:59:09,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:59:09,016 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 956 transitions. [2020-10-29 09:59:09,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-29 09:59:09,017 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:59:09,017 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:59:09,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-29 09:59:09,018 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:59:09,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:59:09,018 INFO L82 PathProgramCache]: Analyzing trace with hash -622293826, now seen corresponding path program 6 times [2020-10-29 09:59:09,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:59:09,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1993476094] [2020-10-29 09:59:09,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:59:09,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:59:09,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:59:09,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:59:09,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:59:14,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:59:14,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-29 09:59:14,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:59:14,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5165 [2020-10-29 09:59:14,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:59:14,200 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:59:14,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:59:14,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-29 09:59:14,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-29 09:59:14,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:59:14,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:59:14,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:59:14,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:59:14,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:59:14,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:59:14,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:59:14,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:59:14,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:59:14,359 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:59:14,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:59:14,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:59:14,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:59:14,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:59:14,363 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 09:59:14,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1993476094] [2020-10-29 09:59:14,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:59:14,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:59:14,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935724861] [2020-10-29 09:59:14,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:59:14,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:59:14,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:59:14,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:59:14,365 INFO L87 Difference]: Start difference. First operand 689 states and 956 transitions. Second operand 12 states. [2020-10-29 09:59:15,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:59:15,707 INFO L93 Difference]: Finished difference Result 1525 states and 2051 transitions. [2020-10-29 09:59:15,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 09:59:15,708 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2020-10-29 09:59:15,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:59:15,715 INFO L225 Difference]: With dead ends: 1525 [2020-10-29 09:59:15,716 INFO L226 Difference]: Without dead ends: 1480 [2020-10-29 09:59:15,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=154, Invalid=352, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:59:15,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1480 states. [2020-10-29 09:59:16,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1480 to 976. [2020-10-29 09:59:16,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 976 states. [2020-10-29 09:59:16,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 1373 transitions. [2020-10-29 09:59:16,120 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 1373 transitions. Word has length 47 [2020-10-29 09:59:16,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:59:16,121 INFO L481 AbstractCegarLoop]: Abstraction has 976 states and 1373 transitions. [2020-10-29 09:59:16,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:59:16,121 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 1373 transitions. [2020-10-29 09:59:16,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-29 09:59:16,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:59:16,146 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:59:16,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-29 09:59:16,147 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:59:16,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:59:16,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1840380342, now seen corresponding path program 2 times [2020-10-29 09:59:16,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:59:16,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [611079117] [2020-10-29 09:59:16,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:59:16,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:59:16,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:59:16,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:59:16,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:59:16,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:59:17,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:59:18,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:59:18,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:59:20,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:59:20,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:59:21,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:59:21,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-29 09:59:21,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 09:59:21,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-29 09:59:21,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:59:21,201 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:59:21,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:59:21,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 09:59:21,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-29 09:59:21,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:59:21,493 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 27 [2020-10-29 09:59:21,611 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 26 [2020-10-29 09:59:21,743 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 33 [2020-10-29 09:59:21,885 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 40 [2020-10-29 09:59:22,063 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 48 [2020-10-29 09:59:22,201 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 44 [2020-10-29 09:59:22,355 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 48 [2020-10-29 09:59:22,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:59:22,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:59:22,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:59:22,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:59:22,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:59:22,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:59:22,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:59:22,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:59:22,439 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:59:22,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:59:22,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:59:22,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:59:22,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:59:22,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-29 09:59:22,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:59:22,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:59:22,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:59:22,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 09:59:22,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:59:22,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 09:59:22,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:59:22,443 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:59:22,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:59:22,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 09:59:22,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:59:22,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:59:22,456 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-29 09:59:22,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [611079117] [2020-10-29 09:59:22,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:59:22,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:59:22,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654158946] [2020-10-29 09:59:22,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:59:22,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:59:22,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:59:22,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:59:22,457 INFO L87 Difference]: Start difference. First operand 976 states and 1373 transitions. Second operand 12 states. [2020-10-29 09:59:23,787 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2020-10-29 09:59:24,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:59:24,499 INFO L93 Difference]: Finished difference Result 1992 states and 2699 transitions. [2020-10-29 09:59:24,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 09:59:24,501 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2020-10-29 09:59:24,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:59:24,507 INFO L225 Difference]: With dead ends: 1992 [2020-10-29 09:59:24,507 INFO L226 Difference]: Without dead ends: 1648 [2020-10-29 09:59:24,509 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:59:24,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1648 states. [2020-10-29 09:59:24,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1648 to 1085. [2020-10-29 09:59:24,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1085 states. [2020-10-29 09:59:24,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1085 states to 1085 states and 1534 transitions. [2020-10-29 09:59:24,842 INFO L78 Accepts]: Start accepts. Automaton has 1085 states and 1534 transitions. Word has length 49 [2020-10-29 09:59:24,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:59:24,843 INFO L481 AbstractCegarLoop]: Abstraction has 1085 states and 1534 transitions. [2020-10-29 09:59:24,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:59:24,843 INFO L276 IsEmpty]: Start isEmpty. Operand 1085 states and 1534 transitions. [2020-10-29 09:59:24,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-29 09:59:24,846 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:59:24,846 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:59:24,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-29 09:59:24,846 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:59:24,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:59:24,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1980928952, now seen corresponding path program 1 times [2020-10-29 09:59:24,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:59:24,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1951098302] [2020-10-29 09:59:24,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:59:24,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-29 09:59:24,867 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-29 09:59:24,867 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-29 09:59:24,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-29 09:59:24,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.10 09:59:24 BoogieIcfgContainer [2020-10-29 09:59:24,893 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-29 09:59:24,895 INFO L168 Benchmark]: Toolchain (without parser) took 160326.29 ms. Allocated memory was 151.0 MB in the beginning and 814.7 MB in the end (delta: 663.7 MB). Free memory was 127.8 MB in the beginning and 331.4 MB in the end (delta: -203.5 MB). Peak memory consumption was 461.4 MB. Max. memory is 8.0 GB. [2020-10-29 09:59:24,896 INFO L168 Benchmark]: CDTParser took 0.55 ms. Allocated memory is still 125.8 MB. Free memory is still 101.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-29 09:59:24,896 INFO L168 Benchmark]: CACSL2BoogieTranslator took 381.29 ms. Allocated memory is still 151.0 MB. Free memory was 127.0 MB in the beginning and 115.6 MB in the end (delta: 11.4 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2020-10-29 09:59:24,897 INFO L168 Benchmark]: Boogie Preprocessor took 110.90 ms. Allocated memory is still 151.0 MB. Free memory was 115.6 MB in the beginning and 113.4 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-29 09:59:24,898 INFO L168 Benchmark]: RCFGBuilder took 829.53 ms. Allocated memory is still 151.0 MB. Free memory was 113.4 MB in the beginning and 126.4 MB in the end (delta: -13.1 MB). Peak memory consumption was 18.9 MB. Max. memory is 8.0 GB. [2020-10-29 09:59:24,899 INFO L168 Benchmark]: TraceAbstraction took 158986.76 ms. Allocated memory was 151.0 MB in the beginning and 814.7 MB in the end (delta: 663.7 MB). Free memory was 125.9 MB in the beginning and 331.4 MB in the end (delta: -205.5 MB). Peak memory consumption was 458.3 MB. Max. memory is 8.0 GB. [2020-10-29 09:59:24,904 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.55 ms. Allocated memory is still 125.8 MB. Free memory is still 101.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 381.29 ms. Allocated memory is still 151.0 MB. Free memory was 127.0 MB in the beginning and 115.6 MB in the end (delta: 11.4 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 110.90 ms. Allocated memory is still 151.0 MB. Free memory was 115.6 MB in the beginning and 113.4 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 829.53 ms. Allocated memory is still 151.0 MB. Free memory was 113.4 MB in the beginning and 126.4 MB in the end (delta: -13.1 MB). Peak memory consumption was 18.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 158986.76 ms. Allocated memory was 151.0 MB in the beginning and 814.7 MB in the end (delta: 663.7 MB). Free memory was 125.9 MB in the beginning and 331.4 MB in the end (delta: -205.5 MB). Peak memory consumption was 458.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 7]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L16] int INFINITY = 899; [L18] int nodecount = __VERIFIER_nondet_int(); [L19] int edgecount = __VERIFIER_nondet_int(); [L20] COND FALSE !(!(0 <= nodecount && nodecount <= 4)) [L21] COND FALSE !(!(0 <= edgecount && edgecount <= 19)) [L22] int source = 0; [L23] int Source[20] = {0,4,1,1,0,0,1,3,4,4,2,2,3,0,0,3,1,2,2,3}; [L24] int Dest[20] = {1,3,4,1,1,4,3,4,3,0,0,0,0,2,3,0,2,1,0,4}; [L25] int Weight[20] = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19}; [L26] int distance[5]; [L27] int x,y; [L28] int i,j; [L30] i = 0 [L30] COND TRUE i < nodecount [L31] COND TRUE i == source [L32] distance[i] = 0 [L30] i++ [L30] COND TRUE i < nodecount [L31] COND FALSE !(i == source) [L35] distance[i] = INFINITY [L30] i++ [L30] COND FALSE !(i < nodecount) [L39] i = 0 [L39] COND TRUE i < nodecount [L41] j = 0 [L41] COND TRUE j < edgecount [L43] EXPR Dest[j] [L43] x = Dest[j] [L44] EXPR Source[j] [L44] y = Source[j] [L45] EXPR distance[x] [L45] EXPR distance[y] [L45] EXPR Weight[j] [L45] COND TRUE distance[x] > distance[y] + Weight[j] [L47] distance[x] = -1 [L41] j++ [L41] COND FALSE !(j < edgecount) [L39] i++ [L39] COND TRUE i < nodecount [L41] j = 0 [L41] COND TRUE j < edgecount [L43] EXPR Dest[j] [L43] x = Dest[j] [L44] EXPR Source[j] [L44] y = Source[j] [L45] EXPR distance[x] [L45] EXPR distance[y] [L45] EXPR Weight[j] [L45] COND FALSE !(distance[x] > distance[y] + Weight[j]) [L41] j++ [L41] COND FALSE !(j < edgecount) [L39] i++ [L39] COND FALSE !(i < nodecount) [L51] i = 0 [L51] COND TRUE i < edgecount [L53] EXPR Dest[i] [L53] x = Dest[i] [L54] EXPR Source[i] [L54] y = Source[i] [L55] EXPR distance[x] [L55] EXPR distance[y] [L55] EXPR Weight[i] [L55] COND FALSE !(distance[x] > distance[y] + Weight[i]) [L51] i++ [L51] COND FALSE !(i < edgecount) [L61] i = 0 [L61] COND TRUE i < nodecount [L63] EXPR distance[i] [L63] CALL __VERIFIER_assert(distance[i]>=0) [L11] COND FALSE !(!(cond)) [L63] RET __VERIFIER_assert(distance[i]>=0) [L61] i++ [L61] COND TRUE i < nodecount [L63] EXPR distance[i] [L63] CALL __VERIFIER_assert(distance[i]>=0) [L11] COND TRUE !(cond) [L12] CALL reach_error() [L7] __assert_fail("0", "eureka_01-1.c", 7, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 45 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 158.8s, OverallIterations: 28, TraceHistogramMax: 4, AutomataDifference: 64.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1332 SDtfs, 3655 SDslu, 5087 SDs, 0 SdLazy, 11410 SolverSat, 1989 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 14.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 763 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 668 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11987 ImplicationChecksByTransitivity, 51.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1085occurred in iteration=27, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.3s AutomataMinimizationTime, 27 MinimizatonAttempts, 4666 StatesRemovedByMinimization, 26 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 90.3s InterpolantComputationTime, 1044 NumberOfCodeBlocks, 1044 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 968 ConstructedInterpolants, 0 QuantifiedInterpolants, 424117 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 27 InterpolantComputations, 3 PerfectInterpolantSequences, 158/369 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...